Systems with a yearly average above an EPA comparison level
23.8%85 of 357 active community water systems
All 357 systems met the sampling requirement for a yearly average. Of those systems, 85 had at least one yearly average above an EPA comparison level and 272 did not.
EPA-based study benchmark: a fixed, unrounded research cutoff used to reproduce EPA’s final UCMR 5 technical-assistance classification based on the April 2024 federal levels. It is not a current federal or state standard. The label does not determine compliance, household exposure, or health risk.
State rules: The labels on this page use fixed research cutoffs based on the April 2024 federal levels. Pennsylvania may use different current standards or guidance. These UCMR 5 results do not determine current federal or state compliance. Find the official Pennsylvania drinking-water program →
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A ZIP code finds possible public water systems for an area; it cannot identify the supplier for a specific home. Confirm the provider using a water bill or utility record.
Compound summary
System counts in Pennsylvania
Each count shows how many included water systems had a yearly average above the named EPA comparison level.
| EPA rounding cutoff | Systems above comparison level | Water systems included | Percent |
|---|---|---|---|
| PFOA: 4 ppt level; unrounded average ≥4.05 ppt after applying EPA rounding | 67 | 357 | 18.8% |
| PFOS: 4 ppt level; unrounded average ≥4.05 ppt after applying EPA rounding | 73 | 357 | 20.4% |
| PFHxS: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 2 | 357 | 0.6% |
| PFNA: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 2 | 357 | 0.6% |
| HFPO-DA: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 0 | 357 | 0.0% |
| Hazard Index: 1 level; unrounded index ≥1.5 and at least two detected components | 4 | 357 | 1.1% |
System directory
Community water systems with complete monitoring
“Complete monitoring” means at least one sampling location had every required sample needed to calculate a yearly average. It does not mean every location or home was tested. Each PWSID appears once, preventing double counting across ZIP associations.
| Public water system | PWSID | Population served | Primary source | Sampling locations | EPA comparison result |
|---|---|---|---|---|---|
| AKRON BOROUGH | PA7360128 | 4,200 | Ground water | 2 | No available average above comparison levels |
| ALBION BOROUGH | PA6250007 | 5,842 | Ground water | 2 | No available average above comparison levels |
| ALTOONA WATER AUTHORITY | PA4070023 | 62,500 | Surface water | 4 | No available average above comparison levels |
| AMBLER BORO WATER DEPT | PA1460020 | 20,000 | Surface water | 9 | Above an EPA comparison level |
| AMBRIDGE WATER AUTH | PA5040008 | 19,500 | Surface water | 1 | No available average above comparison levels |
| AQUA PA BENSALEM | PA1090078 | 59,001 | Surface water purchased | 2 | Above an EPA comparison level |
| AQUA PA BRISTOL | PA1090001 | 28,727 | Surface water | 1 | No available average above comparison levels |
| AQUA PA CHALFONT | PA1090005 | 5,900 | Ground water | 3 | Above an EPA comparison level |
| AQUA PA FAWN LAKE FOREST | PA2520037 | 6,533 | Ground water | 6 | No available average above comparison levels |
| AQUA PA FLYING HILLS WA SYS | PA3060018 | 5,100 | Ground water | 3 | Above an EPA comparison level |
| AQUA PA FRIENDSHIP | PA1150137 | 8,800 | Ground water | 7 | Above an EPA comparison level |
| AQUA PA HATBORO | PA1460028 | 12,901 | Surface water purchased | 3 | Above an EPA comparison level |
| AQUA PA INC TREASURE LAKE DIV | PA6170048 | 4,155 | Ground water | 2 | No available average above comparison levels |
| AQUA PA JENKS TWP WTP | PA6270008 | 4,320 | Ground water | 1 | No available average above comparison levels |
| AQUA PA LAKE LATONKA WTP | PA6430059 | 1,600 | Ground water | 1 | No available average above comparison levels |
| AQUA PA MAIN SYSTEM | PA1460073 | 822,600 | Surface water | 19 | Above an EPA comparison level |
| AQUA PA PERKIOMEN TOWNSHIP | PA1460069 | 3,600 | Ground water | 5 | Above an EPA comparison level |
| AQUA PA ROARING CREEK DIVISION | PA4490024 | 43,000 | Surface water | 2 | No available average above comparison levels |
| AQUA PA SHENANGO VALLEY WTP | PA6430054 | 48,000 | Surface water | 1 | No available average above comparison levels |
| AQUA PA SPRING RUN | PA1150089 | 8,151 | Surface water purchased | 4 | Above an EPA comparison level |
| AQUA PA SUPERIOR MAIN SYSTEM | PA1460085 | 11,400 | Surface water purchased | 8 | Above an EPA comparison level |
| AQUA PA SUSQUEHANNA DIVISION | PA2080028 | 15,569 | Ground water | 1 | No available average above comparison levels |
| AQUA PA UWCHLAN | PA1150035 | 35,518 | Surface water purchased | 7 | Above an EPA comparison level |
| AQUA PA WATER CO HONESDALE | PA2640018 | 5,500 | Ground water | 4 | No available average above comparison levels |
| AQUA PA WEST CHESTER | PA1150098 | 48,600 | Surface water | 2 | Above an EPA comparison level |
| ASHLAND AREA WATER AUTHORITY | PA3540030 | 4,200 | Surface water | 1 | Above an EPA comparison level |
| AUDUBON WATER COMPANY | PA1460055 | 8,200 | Surface water purchased | 8 | Above an EPA comparison level |
| AUTH OF BORO OF CHARLEROI | PA5630039 | 27,000 | Surface water | 1 | No available average above comparison levels |
| BADEN BORO WATER DEPT | PA5040080 | 3,948 | Surface water purchased | 1 | No available average above comparison levels |
| BCWSA MAIN LOWER SOUTH | PA1090079 | 52,621 | Surface water purchased | 4 | Above an EPA comparison level |
| BEAR VALLEY JOINT AUTH | PA7280043 | 12,589 | Surface water | 2 | No available average above comparison levels |
| BEAVER BORO MUNI AUTH | PA5040009 | 5,799 | Ground water | 1 | Above an EPA comparison level |
| BEAVER FALLS MUNI AUTH | PA5040012 | 49,500 | Surface water | 1 | No available average above comparison levels |
| BELLE VERNON BORO MUNI AUTH | PA5260004 | 6,000 | Surface water purchased | 1 | No available average above comparison levels |
| BELLEFONTE BOROUGH WATER AUTH | PA4140075 | 9,500 | Ground water | 2 | No available average above comparison levels |
| BIRDSBORO MUNI WATER AUTH | PA3060010 | 5,353 | Surface water | 1 | No available average above comparison levels |
| BLAIRSVILLE MUNI AUTH | PA5320006 | 4,023 | Surface water | 1 | No available average above comparison levels |
| BLYTHE TWP MUNICIPAL AUTHORITY | PA3540017 | 7,100 | Surface water | 3 | No available average above comparison levels |
| BORO OF WAYNESBORO | PA7280032 | 13,200 | Surface water | 2 | No available average above comparison levels |
| BOYERTOWN MUNI AUTH | PA3060081 | 8,000 | Surface water | 1 | No available average above comparison levels |
| BRACKENRIDGE BORO WATER DEPT | PA5020006 | 3,700 | Surface water | 1 | No available average above comparison levels |
| BRADFORD CITY WATER AUTHORITY | PA6420014 | 18,500 | Surface water | 1 | No available average above comparison levels |
| BRIGHTON TWP MUNI AUTH | PA5040017 | 7,920 | Ground water purchased | 1 | No available average above comparison levels |
| BROCKWAY BORO MUNICIPAL AUTH | PA6330002 | 4,384 | Surface water | 2 | No available average above comparison levels |
| BRODHEAD CREEK REG WATER AUTH | PA2450034 | 30,000 | Surface water | 4 | No available average above comparison levels |
| BROOKVILLE MUNICIPAL AUTH | PA6330004 | 6,220 | Surface water | 1 | No available average above comparison levels |
| BUCK HILL FALLS WATER CO | PA2450020 | 876 | Surface water | 2 | No available average above comparison levels |
| BUCKINGHAM TWP COLD SPRING | PA1090137 | 4,760 | Ground water | 2 | Above an EPA comparison level |
| BUFFALO TWP MUN AUTH FREEPORT | PA5030019 | 5,849 | Surface water | 1 | No available average above comparison levels |
| CAERNARVON TWP AUTH | PA3060052 | 4,245 | Ground water | 3 | Above an EPA comparison level |
| CAPITAL REGION WATER | PA7220049 | 66,540 | Surface water | 1 | No available average above comparison levels |
| CARLISLE WATER TRMT PLT | PA7210002 | 26,000 | Surface water | 1 | Above an EPA comparison level |
| CATASAUQUA MUN WATER WORKS | PA3390044 | 6,598 | Ground water | 1 | No available average above comparison levels |
| CENTRAL INDIANA CO WATER AUTH | PA5320040 | 4,920 | Surface water | 1 | No available average above comparison levels |
| CENTRE HALL BORO WATER DEPT | PA4140077 | 1,900 | Ground water | 1 | No available average above comparison levels |
| CHAMBERSBURG BORO WATER SYS | PA7280005 | 31,048 | Surface water | 1 | No available average above comparison levels |
| CHESTER WATER AUTHORITY | PA1230004 | 140,437 | Surface water | 1 | No available average above comparison levels |
| CITY OF BETHLEHEM | PA3480046 | 117,259 | Surface water | 1 | No available average above comparison levels |
| CITY OF DUBOIS WATER DEPART | PA6170016 | 7,794 | Surface water | 1 | No available average above comparison levels |
| CITY OF LANCASTER, PA | PA7360058 | 120,000 | Surface water | 2 | Above an EPA comparison level |
| CITY OF LOCK HAVEN WATER DEPT | PA4180048 | 10,000 | Surface water | 1 | No available average above comparison levels |
| CLEARFIELD MUNICIPAL AUTH | PA6170008 | 14,000 | Surface water | 2 | No available average above comparison levels |
| COLLEGE TWP. WATER AUTHORITY | PA4140082 | 6,000 | Ground water | 2 | No available average above comparison levels |
| COLLEGEVILLE TRAPPE JOINT PWD | PA1460022 | 8,470 | Ground water | 7 | Above an EPA comparison level |
| COLUMBIA WATER CO | PA7360123 | 25,200 | Surface water | 3 | No available average above comparison levels |
| CONEMAUGH TWP MUNI AUTH | PA4560048 | 7,800 | Surface water | 4 | No available average above comparison levels |
| CONNEAUT LAKE BOROUGH WTP | PA6200015 | 870 | Ground water | 1 | No available average above comparison levels |
| COOPER TWP MUNICIPAL AUTH | PA6170041 | 3,700 | Surface water | 1 | No available average above comparison levels |
| CORAOPOLIS WATER & SEWER AUTH | PA5020010 | 5,804 | Surface water purchased | 2 | Above an EPA comparison level |
| COUDERSPORT BORO AUTHORITY | PA6530009 | 3,166 | Ground water | 2 | No available average above comparison levels |
| CRANBERRY TWP WTP | PA5100094 | 42,000 | Surface water purchased | 1 | No available average above comparison levels |
| CRESWELL HEIGHTS JT AUTH | PA5040063 | 15,000 | Ground water | 1 | No available average above comparison levels |
| CROYLE TWP WATER AUTH | PA4110299 | 989 | Surface water purchased | 1 | No available average above comparison levels |
| DALLASTOWN YOE WATER AUTH | PA7670085 | 12,300 | Surface water purchased | 1 | No available average above comparison levels |
| DANVILLE MUNICIPAL WATER AUTH | PA4470007 | 4,992 | Surface water | 1 | No available average above comparison levels |
| DENVER BORO | PA7360017 | 3,861 | Surface water | 2 | No available average above comparison levels |
| DERRY BORO MUNI AUTH | PA5650049 | 6,500 | Surface water | 1 | No available average above comparison levels |
| DILLSBURG AREA AUTHORITY | PA7670071 | 8,962 | Ground water | 4 | Above an EPA comparison level |
| DOVER TWP WATER SYS | PA7670073 | 21,097 | Surface water purchased | 9 | Above an EPA comparison level |
| DOWNINGTOWN WATER AUTHORITY | PA1150026 | 9,900 | Surface water | 1 | No available average above comparison levels |
| DOYLESTOWN BORO WATER DEPT | PA1090081 | 8,700 | Ground water | 5 | Above an EPA comparison level |
| DTMA MAIN SYSTEM | PA1090128 | 8,655 | Surface water purchased | 8 | Above an EPA comparison level |
| DUQUESNE WATER DEPT | PA5020012 | 5,565 | Surface water purchased | 1 | No available average above comparison levels |
| E ARMSTRONG CNTY MUNI AUTH | PA5030004 | 1,875 | Ground water | 1 | No available average above comparison levels |
| E STROUDSBURG BORO WATER DEPT | PA2450023 | 13,000 | Surface water | 5 | No available average above comparison levels |
| EAST COCALICO TOWNSHIP | PA7360113 | 6,735 | Groundwater under influence of surface water | 10 | Above an EPA comparison level |
| EAST DONEGAL TWP MUNICIPAL AUT | PA7360083 | 4,048 | Ground water | 1 | No available average above comparison levels |
| EAST DUNKARD WATER AUTHORITY | PA5300012 | 4,200 | Surface water | 1 | No available average above comparison levels |
| EAST HEMPFIELD WATER AUTH | PA7360063 | 20,988 | Surface water purchased | 7 | Above an EPA comparison level |
| EAST PETERSBURG BOROUGH | PA7360135 | 6,215 | Surface water purchased | 2 | Above an EPA comparison level |
| EASTON AREA WATER SYSTEM | PA3480050 | 96,867 | Surface water | 1 | No available average above comparison levels |
| EBENSBURG BORO MUNI AUTH | PA4110009 | 8,500 | Surface water | 2 | No available average above comparison levels |
| EDGEWORTH BORO MUNI AUTH | PA5020015 | 7,781 | Surface water purchased | 2 | No available average above comparison levels |
| EDINBORO WATER AUTHORITY | PA6250022 | 7,800 | Ground water | 1 | No available average above comparison levels |
| EEI MEADOWS COMPLEX | PA2400115 | 628 | Ground water | 1 | Above an EPA comparison level |
| ELIZABETHTOWN AREA WATER | PA7360124 | 19,000 | Surface water | 6 | Above an EPA comparison level |
| ELLSWORTH BORO WATER DEPT | PA5630044 | 1,250 | Surface water purchased | 1 | No available average above comparison levels |
| EMMAUS BOROUGH PUBLIC WATER | PA3390032 | 14,000 | Ground water | 4 | Above an EPA comparison level |
| EMPORIUM WATER COMPANY | PA6120002 | 3,300 | Surface water | 1 | No available average above comparison levels |
| EPHRATA AREA JOINT AUTHORITY | PA7360045 | 24,500 | Surface water | 3 | Above an EPA comparison level |
| ERIE CITY WATER AUTHORITY | PA6250028 | 220,001 | Surface water | 2 | No available average above comparison levels |
| EVITTS CREEK WATER CO | PA4050028 | 100 | Surface water | 1 | No available average above comparison levels |
| FAIRVIEW TWP WATER AUTH DIST 3 | PA6250040 | 3,320 | Ground water | 1 | No available average above comparison levels |
| FAIRVIEW TWP WATER AUTHORITY | PA6250087 | 4,500 | Surface water purchased | 1 | No available average above comparison levels |
| FALLS TWP WATER & SEWER DEPT | PA1090022 | 24,400 | Surface water purchased | 1 | No available average above comparison levels |
| FAWN FRAZER JT WATER AUTH | PA5020076 | 4,650 | Surface water purchased | 2 | No available average above comparison levels |
| FINDLAY TWP MUNICIPAL AUTH | PA5020078 | 11,460 | Surface water purchased | 2 | No available average above comparison levels |
| FISHERTOWN WATER ASSN | PA4050029 | 801 | Ground water | 1 | No available average above comparison levels |
| FLEETWOOD BORO WATER SYSTEM | PA3060029 | 4,218 | Ground water | 3 | No available average above comparison levels |
| FOX CHAPEL AUTH | PA5020040 | 18,500 | Surface water purchased | 1 | No available average above comparison levels |
| FOXCROFT MANOR MOBILE HOME PK | PA4410166 | 200 | Ground water | 1 | No available average above comparison levels |
| FRANKLIN CO GEN AUTH | PA7280045 | 4,400 | Surface water | 1 | No available average above comparison levels |
| FREELAND BORO MUNI WATER AUTH | PA2400054 | 4,610 | Ground water | 5 | Above an EPA comparison level |
| GENERAL AUTHORITY OF FRANKLIN | PA6610020 | 9,096 | Ground water | 2 | No available average above comparison levels |
| GETTYSBURG MUNI AUTH | PA7010019 | 12,425 | Surface water | 7 | Above an EPA comparison level |
| GIRARD BORO WATER DEPT | PA6250049 | 3,301 | Ground water | 3 | No available average above comparison levels |
| GLENDALE VALLEY MUNICIPAL AUTH | PA4110060 | 3,200 | Ground water purchased | 3 | No available average above comparison levels |
| GREATER JOHNSTOWN WA RIVERSIDE | PA4110034 | 49,500 | Surface water | 1 | No available average above comparison levels |
| GREENCASTLE AREA WATER AUTH | PA7280014 | 5,500 | Surface water | 1 | No available average above comparison levels |
| GREENVILLE MUNI WATER AUTH | PA6430037 | 8,600 | Surface water | 1 | No available average above comparison levels |
| GROVE CITY BORO WATER DEPT | PA6430040 | 7,871 | Ground water | 1 | No available average above comparison levels |
| GUILFORD WATER AUTH | PA7280038 | 28,135 | Ground water | 3 | No available average above comparison levels |
| HAMBURG MUNI WATER&SEWER AUTH | PA3060035 | 4,990 | Surface water | 2 | No available average above comparison levels |
| HAMPTON SHALER WATER AUTHORITY | PA5020019 | 61,949 | Surface water purchased | 2 | No available average above comparison levels |
| HANOVER MUNI WATER WORKS | PA7670076 | 40,900 | Surface water | 1 | No available average above comparison levels |
| HARMONY BORO WATER AUTH | PA5100042 | 6,669 | Surface water | 1 | No available average above comparison levels |
| HARRISON TWP WATER AUTH | PA5020108 | 13,411 | Surface water | 1 | No available average above comparison levels |
| HASTINGS MUNI AUTH | PA4110013 | 2,100 | Surface water | 2 | No available average above comparison levels |
| HCA HAZLETON DIVISION | PA2408001 | 45,000 | Surface water | 1 | No available average above comparison levels |
| HEGINS HUBLEY AUTHORITY | PA3540047 | 3,870 | Ground water | 3 | No available average above comparison levels |
| HELLERTOWN BOROUGH AUTHORITY | PA3480052 | 5,800 | Ground water | 3 | No available average above comparison levels |
| HEMLOCK FARMS (MAIN) | PA2520033 | 8,321 | Ground water | 5 | No available average above comparison levels |
| HICKORY HILLS MHC | PA3480015 | 800 | Ground water | 1 | No available average above comparison levels |
| HIGHLAND S & W AUTH BEAVERDAM | PA4110017 | 22,617 | Surface water | 1 | No available average above comparison levels |
| HIGHRIDGE WATER AUTH | PA5650069 | 16,000 | Surface water | 2 | No available average above comparison levels |
| HILLTOWN TWP WATER&SEWER AUTH | PA1090117 | 5,770 | Surface water purchased | 4 | Above an EPA comparison level |
| HOLLIDAYSBURG MUNI AUTH | PA4070017 | 8,523 | Surface water purchased | 1 | No available average above comparison levels |
| HORSHAM WATER&SEWER AUTHORITY | PA1460033 | 26,000 | Surface water purchased | 11 | Above an EPA comparison level |
| HOUTZDALE MUNICIPAL AUTHORITY | PA6170023 | 8,410 | Surface water | 1 | No available average above comparison levels |
| HUNTINGDON BORO WATER DEPT | PA4310012 | 13,776 | Surface water | 1 | No available average above comparison levels |
| ICMSA CROOKED CREEK | PA5320109 | 9,638 | Surface water | 1 | No available average above comparison levels |
| INDIAN CREEK VALLEY WATER AUTH | PA5260011 | 7,000 | Surface water | 4 | No available average above comparison levels |
| JERSEY SHORE AREA JNT WAT AUTH | PA4410156 | 6,600 | Surface water | 2 | No available average above comparison levels |
| KENNETT SQUARE MUN WATER WORKS | PA1150108 | 6,328 | Surface water purchased | 3 | Above an EPA comparison level |
| KITTANNING SUBURB JT WATER AUT | PA5030043 | 8,000 | Surface water | 1 | No available average above comparison levels |
| KLINE TOWNSHIP MUN AUTHORITY | PA3540014 | 6,700 | Ground water | 2 | No available average above comparison levels |
| KUTZTOWN BOROUGH WATER | PA3060041 | 14,200 | Groundwater under influence of surface water | 1 | No available average above comparison levels |
| LAKEVIEW MOBILEHOME PARK | PA5100080 | 44 | Ground water | 1 | No available average above comparison levels |
| LANSFORD COALDALE JT WATER AUT | PA3130004 | 9,300 | Ground water | 1 | No available average above comparison levels |
| LATROBE MUNI AUTH | PA5650060 | 30,000 | Surface water | 1 | No available average above comparison levels |
| LCA ALLENTOWN DIVISION | PA3390024 | 118,000 | Surface water | 2 | No available average above comparison levels |
| LCA NORTH WHITEHALL DIVISION | PA3390055 | 2,910 | Surface water purchased | 1 | No available average above comparison levels |
| LCA WLSA CENTRAL DIVISION | PA3390073 | 47,693 | Surface water purchased | 14 | Above an EPA comparison level |
| LEBANON WATER AUTH | PA7380010 | 57,000 | Surface water | 1 | No available average above comparison levels |
| LEHIGHTON WATER AUTHORITY | PA3130009 | 9,000 | Surface water | 1 | No available average above comparison levels |
| LEWISTOWN BORO MUNI AUTH | PA4440010 | 29,432 | Surface water | 1 | No available average above comparison levels |
| LITITZ BORO | PA7360126 | 9,397 | Groundwater under influence of surface water | 1 | No available average above comparison levels |
| LITTLESTOWN BORO | PA7010022 | 7,300 | Ground water | 7 | Above an EPA comparison level |
| LONDON GROVE TWP MUN AUTH | PA1150165 | 4,770 | Surface water purchased | 2 | No available average above comparison levels |
| LOWER BUCKS CO JOINT MUN AUTH | PA1090026 | 63,007 | Surface water | 1 | No available average above comparison levels |
| LOWER SAUCON AUTHORITY | PA3480027 | 5,700 | Surface water purchased | 1 | No available average above comparison levels |
| LUTHERAN HOME AT TOPTON | PA3060094 | 410 | Ground water | 1 | No available average above comparison levels |
| MAHANOY TWP AUTH | PA3540011 | 5,584 | Surface water | 1 | No available average above comparison levels |
| MAIDENCREEK TWP WATER AUTH | PA3060012 | 7,505 | Ground water | 3 | No available average above comparison levels |
| MANHEIM AREA WATER & SEWER AUT | PA7360078 | 6,701 | Groundwater under influence of surface water | 1 | Above an EPA comparison level |
| MANOR TWP JT MUNI AUTH | PA5030006 | 6,744 | Ground water | 1 | No available average above comparison levels |
| MANSFIELD BOROUGH MUN AUTH | PA2590038 | 4,100 | Surface water | 1 | No available average above comparison levels |
| MAPLE MANOR MHP | PA5100071 | 37 | Ground water | 1 | No available average above comparison levels |
| MASONIC HOMES | PA7360025 | 3,707 | Ground water | 1 | No available average above comparison levels |
| MASONTOWN MUNI WATER WORKS | PA5260013 | 3,841 | Surface water purchased | 1 | No available average above comparison levels |
| MAWC SWEENEY PLANT | PA5650032 | 143,000 | Surface water | 1 | No available average above comparison levels |
| MEADVILLE AREA WATER AUTHORITY | PA6200036 | 17,339 | Ground water | 1 | No available average above comparison levels |
| MESHOPPEN BOROUGH WATER CO | PA2660010 | 563 | Ground water | 1 | No available average above comparison levels |
| MIDDLESEX TWP MUNI AUTH | PA7210063 | 3,527 | Ground water | 2 | No available average above comparison levels |
| MIFFLINBURG BORO WATER DEPT | PA4600012 | 3,690 | Surface water | 1 | No available average above comparison levels |
| MIFFLINTOWN MUNI AUTH | PA4340008 | 4,450 | Surface water | 1 | No available average above comparison levels |
| MILFORD TWP WATER AUTHORITY | PA1090125 | 4,497 | Ground water | 3 | No available average above comparison levels |
| MILLERSBURG WATER AUTH | PA7220034 | 4,600 | Surface water | 2 | Above an EPA comparison level |
| MILLERSVILLE UNIV | PA7360127 | 7,950 | Ground water | 1 | Above an EPA comparison level |
| MILLVILLE MUNICIPAL AUTHORITY | PA4190017 | 969 | Groundwater under influence of surface water | 1 | No available average above comparison levels |
| MINERSVILLE MUNICIPAL WATER AU | PA3540035 | 7,275 | Surface water | 1 | No available average above comparison levels |
| MONACA BORO WATER DEPT | PA5040039 | 6,500 | Ground water | 1 | No available average above comparison levels |
| MONROEVILLE MUNICIPAL AUTH | PA5020027 | 48,500 | Surface water purchased | 3 | No available average above comparison levels |
| MONTOURSVILLE WATER COMPANY | PA4410175 | 4,983 | Ground water | 2 | Above an EPA comparison level |
| MOON TWP MUNI AUTH | PA5020011 | 38,000 | Surface water | 1 | Above an EPA comparison level |
| MORRISVILLE MUNIC AUTHORITY | PA1090037 | 13,342 | Surface water | 1 | No available average above comparison levels |
| MOUNTAIN WATER ASSN | PA5260032 | 3,856 | Surface water purchased | 2 | No available average above comparison levels |
| MT JOY BORO AUTH | PA7360091 | 15,261 | Groundwater under influence of surface water | 2 | No available average above comparison levels |
| MT PENN BORO MUNI AUTH | PA3060082 | 10,400 | Ground water | 2 | No available average above comparison levels |
| MT UNION MUNICIPAL AUTH | PA4310016 | 5,801 | Surface water | 3 | No available average above comparison levels |
| MUHLENBERG TWP MUNI AUTH | PA3060038 | 22,400 | Ground water | 8 | Above an EPA comparison level |
| MUN AUTH OF BORO OF BEDFORD | PA4050002 | 5,127 | Surface water | 1 | No available average above comparison levels |
| MUN WATER AUTH OF ALIQUIPPA | PA5040006 | 15,685 | Ground water | 1 | No available average above comparison levels |
| MUNI AUTH OF WASHINGTON TWP | PA5260009 | 9,100 | Surface water | 2 | No available average above comparison levels |
| MUNICIPAL AUTHORITY OF CORRY | PA6250012 | 7,800 | Ground water | 1 | No available average above comparison levels |
| MUNICIPAL AUTHORITY SUNBURY | PA4490007 | 11,043 | Surface water | 1 | No available average above comparison levels |
| MUNICIPAL WATER AUTH ADAMS TWP | PA5100141 | 8,700 | Surface water purchased | 1 | No available average above comparison levels |
| MYERSTOWN WATER AUTH | PA7380025 | 9,500 | Groundwater under influence of surface water | 1 | No available average above comparison levels |
| N MIDDLETON WATER AUTH | PA7210049 | 8,455 | Surface water | 2 | Above an EPA comparison level |
| NANTY GLO WATER AUTH | PA4110023 | 3,152 | Surface water | 1 | No available average above comparison levels |
| NEVILLE TWP WATER DEPT | PA5020029 | 6,750 | Surface water purchased | 1 | No available average above comparison levels |
| NEW FREEDOM BORO WATER AUTH | PA7670082 | 4,464 | Surface water purchased | 5 | No available average above comparison levels |
| NEW HOLLAND BOROUGH | PA7360099 | 8,490 | Ground water | 4 | Above an EPA comparison level |
| NEW KENSINGTON MUNI AUTH | PA5650070 | 47,800 | Surface water | 1 | No available average above comparison levels |
| NEW OXFORD MUNCI AUTH | PA7010025 | 3,963 | Surface water | 2 | Above an EPA comparison level |
| NEW SEWICKLEY TWP MUNI AUTH | PA5040085 | 4,276 | Surface water purchased | 3 | No available average above comparison levels |
| NEW WILMINGTON BORO WATER DEPT | PA6370035 | 4,500 | Surface water purchased | 1 | No available average above comparison levels |
| NEWTOWN ARTESIAN WATER CO | PA1090043 | 38,500 | Surface water purchased | 4 | Above an EPA comparison level |
| NEWVILLE BORO WATER AUTH | PA7210041 | 2,070 | Groundwater under influence of surface water | 1 | No available average above comparison levels |
| NORTH EAST BOROUGH WATER DEPT | PA6250061 | 4,601 | Surface water | 1 | No available average above comparison levels |
| NORTH FAYETTE CNTY MUNI AUTH | PA5260019 | 35,409 | Surface water | 1 | No available average above comparison levels |
| NORTH PENN WATER AUTHORITY | PA1460034 | 91,941 | Surface water purchased | 5 | Above an EPA comparison level |
| NORTH SEWICKLEY MUN WATER AUTH | PA5040010 | 4,578 | Surface water purchased | 2 | No available average above comparison levels |
| NORTH WALES WATER AUTHORITY | PA1460048 | 72,496 | Surface water | 7 | Above an EPA comparison level |
| NORTHAMPTON BORO MUNI AUTH | PA3480057 | 40,000 | Surface water | 1 | No available average above comparison levels |
| NORTHAMPTON BUCKS CO MUN AUTH | PA1090089 | 36,750 | Surface water purchased | 16 | Above an EPA comparison level |
| NORTHERN CAMBRIA MUNI WATER | PA4110003 | 4,500 | Groundwater under influence of surface water | 3 | No available average above comparison levels |
| NWWA WARRINGTON TOWNSHIP | PA1090070 | 21,588 | Surface water purchased | 13 | No available average above comparison levels |
| OAKMONT WATER AUTHORITY | PA5020036 | 39,901 | Surface water | 1 | No available average above comparison levels |
| OIL CITY | PA6610023 | 9,608 | Ground water | 1 | No available average above comparison levels |
| OXFORD BOROUGH | PA1150066 | 5,280 | Surface water purchased | 2 | No available average above comparison levels |
| PA AM WATER CO-FRACKVILLE DIST | PA3540032 | 5,583 | Ground water | 1 | Above an EPA comparison level |
| PA AMER WATER CO | PA7220017 | 50,200 | Surface water | 1 | No available average above comparison levels |
| PA AMER WATER CO BROWNELL | PA2359001 | 12,560 | Surface water | 1 | No available average above comparison levels |
| PA AMER WATER CO ELLWOOD CTY | PA6370011 | 17,200 | Surface water | 1 | No available average above comparison levels |
| PA AMER WATER CO LAKE SCRANTON | PA2359008 | 137,142 | Surface water | 8 | Above an EPA comparison level |
| PA AMER WATER CO NEW CASTLE | PA6370034 | 43,279 | Surface water | 1 | No available average above comparison levels |
| PA AMER WATER CO SUSQUEHANNA | PA2580024 | 4,230 | Surface water | 2 | No available average above comparison levels |
| PA AMER WATER CO-PITTSBURGH | PA5020039 | 686,000 | Surface water | 3 | No available average above comparison levels |
| PA AMERICAN COATESVILLE | PA1150106 | 36,960 | Surface water | 1 | No available average above comparison levels |
| PA AMERICAN NORRISTOWN | PA1460046 | 88,885 | Surface water | 1 | No available average above comparison levels |
| PA AMERICAN ROYERSFORD | PA1150166 | 49,508 | Surface water | 5 | Above an EPA comparison level |
| PA AMERICAN WATER BERWICK | PA4190013 | 15,282 | Ground water | 1 | Above an EPA comparison level |
| PA AMERICAN WATER CO BUTLER | PA5100012 | 43,286 | Surface water | 1 | No available average above comparison levels |
| PA AMERICAN WATER CO CLARION | PA6160001 | 10,372 | Surface water | 1 | No available average above comparison levels |
| PA AMERICAN WATER CO KANE | PA6420019 | 5,725 | Surface water | 1 | No available average above comparison levels |
| PA AMERICAN WATER CO WARREN | PA6620020 | 14,650 | Ground water | 1 | No available average above comparison levels |
| PA AMERICAN WATER CO WEST | PA7210029 | 105,127 | Surface water | 2 | Above an EPA comparison level |
| PA AMERICAN WATER CO YARDLEY | PA1090074 | 33,171 | Surface water | 3 | Above an EPA comparison level |
| PA AMERICAN WATER CO-INDIANA D | PA5320025 | 22,360 | Surface water | 1 | No available average above comparison levels |
| PA AMERICAN WATER PUNXSY | PA6330010 | 8,419 | Surface water | 1 | No available average above comparison levels |
| PA AMERICAN WATER STEELTON | PA7220036 | 6,428 | Surface water | 1 | No available average above comparison levels |
| PA AMERICAN WHITE DEER | PA4490023 | 30,209 | Surface water | 2 | No available average above comparison levels |
| PA-AMERICAN WATER CO-CONNELLSV | PA5260022 | 11,425 | Surface water purchased | 2 | No available average above comparison levels |
| PA-AMERICAN WATER CO-KITTANNIG | PA5030008 | 4,499 | Surface water | 1 | No available average above comparison levels |
| PA-AMERICAN WATER- UNIONTOWN | PA5260020 | 23,125 | Surface water purchased | 2 | No available average above comparison levels |
| PA-AMERICAN WATER-BROWNSVILLE | PA5260005 | 7,844 | Surface water | 2 | No available average above comparison levels |
| PALMERTON MUNICIPAL AUTHORITY | PA3130012 | 7,000 | Ground water | 2 | Above an EPA comparison level |
| PAW BANGOR DISTRICT | PA3480038 | 9,008 | Surface water | 2 | No available average above comparison levels |
| PAW BLUE MOUNTAIN DIVISION | PA3480055 | 23,763 | Surface water | 2 | No available average above comparison levels |
| PAW CEASETOWN | PA2409002 | 58,467 | Surface water | 1 | No available average above comparison levels |
| PAW CRYSTAL LAKE | PA2409003 | 9,773 | Surface water | 1 | No available average above comparison levels |
| PAW GLEN ALSACE DIV | PA3060088 | 24,951 | Surface water purchased | 12 | Above an EPA comparison level |
| PAW HUNTSVILLE | PA2409013 | 11,987 | Surface water | 1 | No available average above comparison levels |
| PAW NESBITT | PA2409010 | 52,640 | Surface water | 1 | No available average above comparison levels |
| PAW PENN DISTRICT | PA3060069 | 28,508 | Ground water | 7 | Above an EPA comparison level |
| PAW PHILIPSBURG | PA4140087 | 20,865 | Surface water | 2 | No available average above comparison levels |
| PAW WATRES | PA2409011 | 52,002 | Surface water | 1 | No available average above comparison levels |
| PAWC POCONO DISTRICT | PA2450063 | 17,860 | Ground water | 10 | Above an EPA comparison level |
| PAWC SAW CREEK ESTATES | PA2520062 | 7,016 | Ground water | 4 | No available average above comparison levels |
| PENN ESTATES UTILITIES INCORP | PA2450065 | 4,300 | Ground water | 7 | No available average above comparison levels |
| PENN STATE UNIV. | PA4140095 | 37,000 | Ground water | 1 | No available average above comparison levels |
| PENNS CREEK MUNICIPAL AUTH | PA4550019 | 725 | Ground water | 2 | No available average above comparison levels |
| PERKASIE REGIONAL AUTHORITY | PA1090046 | 15,000 | Ground water | 4 | Above an EPA comparison level |
| PHILADELPHIA WATER DEPARTMENT | PA1510001 | 1,600,000 | Surface water | 3 | Above an EPA comparison level |
| PHOENIXVILLE WATER DEPT | PA1150077 | 16,599 | Surface water | 1 | No available average above comparison levels |
| PIKE TWP MUNICIPAL AUTHORITY | PA6170013 | 4,500 | Surface water | 1 | No available average above comparison levels |
| PITTSBURGH WATER & SEWER AUTH | PA5020038 | 520,000 | Surface water | 1 | No available average above comparison levels |
| PLEASANT VALLEY WATER AUTH | PA5260006 | 3,630 | Surface water purchased | 2 | No available average above comparison levels |
| PLUM BORO MUNI AUTH | PA5020041 | 27,500 | Surface water purchased | 3 | No available average above comparison levels |
| PLUMSTEAD NORTHERN SYSTEM | PA1090144 | 2,605 | Ground water | 4 | Above an EPA comparison level |
| PORTAGE BORO MUNI AUTH | PA4110027 | 6,500 | Surface water | 2 | No available average above comparison levels |
| POTTSTOWN BOROUGH WATER AUTH | PA1460037 | 36,000 | Surface water | 1 | No available average above comparison levels |
| QUAKERTOWN BORO | PA1090082 | 12,800 | Ground water | 8 | Above an EPA comparison level |
| READING AREA WATER AUTHORITY | PA3060059 | 95,100 | Surface water | 1 | Above an EPA comparison level |
| RED LION MUNICIPAL AUTHORITY | PA7670086 | 15,882 | Surface water | 1 | No available average above comparison levels |
| RESERVE TWP WATER DEPT | PA5020047 | 3,204 | Surface water purchased | 1 | No available average above comparison levels |
| RICHLAND TWP WATER AUTHORITY | PA1090131 | 6,800 | Ground water | 3 | Above an EPA comparison level |
| RICHLAND TWP WATER AUTHORITY, PA | PA5020018 | 10,190 | Surface water purchased | 1 | No available average above comparison levels |
| RIDGWAY BOROUGH WATER SYSTEM | PA6240012 | 4,700 | Surface water | 1 | No available average above comparison levels |
| ROAMINGWOOD SEWER AND WATER | PA2640025 | 3,775 | Ground water | 5 | No available average above comparison levels |
| ROBINSON TWP MUNI AUTH | PA5020045 | 16,354 | Surface water | 1 | No available average above comparison levels |
| ROCKVIEW | PA4140098 | 2,850 | Surface water | 3 | No available average above comparison levels |
| ROCKWOOD BORO MUNI AUTH | PA4560020 | 1,250 | Ground water | 1 | No available average above comparison levels |
| SALISBURY TWP WATER SYSTEM | PA3390062 | 8,522 | Surface water purchased | 1 | No available average above comparison levels |
| SCHUYLKILL CO MUN AUTH | PA3540038 | 31,850 | Surface water | 4 | No available average above comparison levels |
| SCHUYLKILL HAVEN BORO WATER | PA3540041 | 6,000 | Surface water | 1 | No available average above comparison levels |
| SCHWENKSVILLE BOROUGH AUTH | PA1460042 | 5,200 | Surface water purchased | 4 | Above an EPA comparison level |
| SELINSGROVE MUN WATERWORKS | PA4550005 | 5,584 | Ground water | 3 | No available average above comparison levels |
| SENECA & CRANBERRY MALL DIST | PA6610031 | 4,500 | Ground water | 2 | No available average above comparison levels |
| SEVEN SPRINGS MUNI AUTH | PA4560024 | 3,000 | Groundwater under influence of surface water | 3 | No available average above comparison levels |
| SEWICKLEY BORO WATER AUTH | PA5020050 | 6,800 | Ground water | 1 | No available average above comparison levels |
| SHARPSVILLE BORO WATER CO | PA6430055 | 5,029 | Surface water purchased | 1 | No available average above comparison levels |
| SHENANDOAH MUN WATER AUTHORITY | PA3540044 | 9,500 | Surface water | 1 | No available average above comparison levels |
| SHILLINGTON MUNI AUTH | PA3060067 | 13,300 | Surface water purchased | 4 | No available average above comparison levels |
| SHIPPENSBURG BORO WATER AUTH | PA7210043 | 17,800 | Surface water | 4 | No available average above comparison levels |
| SHREWSBURY BOROUGH | PA7670088 | 4,727 | Ground water | 8 | Above an EPA comparison level |
| SKYVIEW GARDENS HEIGHTS APTS | PA7500030 | 186 | Ground water | 3 | No available average above comparison levels |
| SLATINGTON BOROUGH WATER SYS | PA3390039 | 4,450 | Surface water | 2 | No available average above comparison levels |
| SLIPPERY ROCK MUNI AUTH | PA5100079 | 15,778 | Ground water | 2 | No available average above comparison levels |
| SOMERSET BORO MUNI WATER AUTH | PA4560042 | 6,309 | Surface water purchased | 3 | No available average above comparison levels |
| SOMERSET TWP MUNI AUTH OAKRIDG | PA4560046 | 3,800 | Surface water purchased | 1 | No available average above comparison levels |
| SOUTH MIDDLETON TWP WATER AUTH | PA7210050 | 11,695 | Surface water purchased | 3 | No available average above comparison levels |
| SOUTHWESTERN CAMBRIA CNTY AUTH | PA4110041 | 4,400 | Surface water purchased | 2 | No available average above comparison levels |
| SOUTHWESTERN PA WATER AUTH | PA5300017 | 40,200 | Surface water | 1 | No available average above comparison levels |
| SPRING TWP WATER AUTHORITY | PA4140118 | 3,300 | Ground water | 2 | No available average above comparison levels |
| SPRINGDALE BORO WATER DEPT | PA5020053 | 3,405 | Ground water | 1 | No available average above comparison levels |
| ST MARYS AREA WATER AUTH | PA6240016 | 19,588 | Surface water | 1 | No available average above comparison levels |
| STATE COLLEGE BORO WATER AUTH. | PA4140096 | 72,000 | Surface water | 5 | No available average above comparison levels |
| STATE CORRECTIONAL INST | PA7210046 | 3,500 | Surface water | 2 | No available average above comparison levels |
| STEWARTSTOWN BORO WATER AUTH | PA7670062 | 5,206 | Surface water purchased | 5 | Above an EPA comparison level |
| SUBURBAN LOCK HAVEN WATER AUTH | PA4180049 | 9,700 | Surface water purchased | 1 | No available average above comparison levels |
| SUEZ MECHANICSBURG | PA7210028 | 45,013 | Surface water | 4 | Above an EPA comparison level |
| SUEZ MIDDLETOWN | PA7220038 | 9,600 | Ground water | 5 | Above an EPA comparison level |
| SUEZ NEWBERRY SYSTEM | PA7670061 | 6,480 | Ground water | 6 | Above an EPA comparison level |
| SUEZ WATER PA | PA7220015 | 110,000 | Surface water | 2 | No available average above comparison levels |
| SUEZ WATER PA BETHEL | PA1230012 | 7,809 | Surface water purchased | 4 | Above an EPA comparison level |
| SUEZ WATER PA DALLAS | PA2400076 | 7,563 | Ground water | 7 | Above an EPA comparison level |
| SUEZ WATER PA INC BLOOMSBURG | PA4190008 | 29,382 | Surface water | 1 | No available average above comparison levels |
| SUMMIT TOWNSHIP WATER AUTHORIT | PA6250090 | 12,500 | Surface water purchased | 2 | No available average above comparison levels |
| SWT MAIN SYSTEM | PA3390065 | 14,500 | Surface water purchased | 9 | No available average above comparison levels |
| TAMAQUA AREA WATER AUTHORITY | PA3540012 | 8,000 | Surface water | 1 | No available average above comparison levels |
| TARENTUM BORO WATER DEPT | PA5020055 | 4,927 | Surface water | 1 | No available average above comparison levels |
| TELFORD BOROUGH AUTHORITY | PA1460050 | 7,700 | Surface water purchased | 7 | Above an EPA comparison level |
| TITUSVILLE MUNICIPAL WATER | PA6200051 | 6,146 | Ground water | 1 | Above an EPA comparison level |
| TOBYHANNA ARMY DEPOT | PA2450053 | 3,800 | Ground water | 1 | No available average above comparison levels |
| TOWANDA MUNICIPAL AUTHORITY | PA2080029 | 5,000 | Groundwater under influence of surface water | 2 | No available average above comparison levels |
| TUNKHANNOCK BORO MUNIC AUTH | PA2660014 | 5,349 | Ground water | 4 | Above an EPA comparison level |
| TYRONE BORO WATER AUTH | PA4070021 | 6,500 | Surface water | 1 | No available average above comparison levels |
| UNION CITY MUNICIPAL AUTHORITY | PA6250064 | 4,295 | Surface water | 1 | No available average above comparison levels |
| UPPER HANOVER WATER AUTHORITY | PA1460036 | 4,600 | Ground water | 4 | No available average above comparison levels |
| UPPER LEACOCK TOWNSHIP | PA7360140 | 7,734 | Surface water purchased | 3 | Above an EPA comparison level |
| UPPER SAUCON TWP WATER SUPPLY | PA3390077 | 7,300 | Surface water purchased | 5 | No available average above comparison levels |
| UPPER SOUTHAMPTON MUN AUTH | PA1090063 | 16,000 | Surface water purchased | 3 | Above an EPA comparison level |
| WARMINSTER MUNICIPAL AUTHORITY | PA1090069 | 36,000 | Surface water purchased | 3 | No available average above comparison levels |
| WARWICK TWP LITITZ SYS | PA7360116 | 8,561 | Purchased ground water under influence of surface water source | 1 | No available average above comparison levels |
| WARWICK TWP WATER & SEWER AUTH | PA1090127 | 14,699 | Surface water purchased | 2 | Above an EPA comparison level |
| WASHINGTON TWP MUNI AUTH | PA7280026 | 6,134 | Ground water | 5 | No available average above comparison levels |
| WASHINGTON TWP WATER SYSTEM | PA6250092 | 797 | Ground water | 1 | No available average above comparison levels |
| WATERFORD MUNICIPAL AUTHORITY | PA6250065 | 1,700 | Ground water | 1 | No available average above comparison levels |
| WELLSBORO MUNICIPAL AUTHORITY | PA2590042 | 8,225 | Surface water | 1 | No available average above comparison levels |
| WERNERSVILLE MUNI WATER AUTH | PA3060076 | 7,920 | Surface water purchased | 7 | No available average above comparison levels |
| WEST CNTY MUNI AUTH-MCKEESPORT | PA5020025 | 32,644 | Surface water | 1 | No available average above comparison levels |
| WEST EARL WATER AUTHORITY | PA7360143 | 4,327 | Surface water purchased | 2 | No available average above comparison levels |
| WEST MANCHESTER TWP AUTH | PA7670101 | 9,960 | Ground water | 3 | Above an EPA comparison level |
| WEST READING BORO WATER | PA3060078 | 4,300 | Surface water purchased | 1 | No available average above comparison levels |
| WEST VIEW WATER AUTHORITY | PA5020043 | 200,000 | Surface water | 2 | No available average above comparison levels |
| WESTERN ALLEGHENY COUNTY MUN A | PA5020034 | 19,031 | Surface water purchased | 4 | No available average above comparison levels |
| WHITEHALL TWP AUTHORITY | PA3390081 | 13,063 | Ground water | 5 | Above an EPA comparison level |
| WILKINSBURG-PENN JT WATER AUTH | PA5020056 | 125,000 | Surface water | 2 | No available average above comparison levels |
| WILLIAMSPORT MUN WATER AUTH | PA4410173 | 51,000 | Surface water | 1 | No available average above comparison levels |
| WINDBER AREA AUTH | PA4560013 | 9,463 | Ground water | 1 | No available average above comparison levels |
| WOMELSDORF ROBESONIA JT AUTH | PA3060080 | 7,070 | Ground water | 3 | No available average above comparison levels |
| WRIGHTSVILLE BORO MUNI AUTH | PA7670097 | 4,076 | Surface water | 1 | No available average above comparison levels |
| WYOMISSING BORO WATER SYSTEM | PA3060083 | 8,500 | Surface water purchased | 1 | No available average above comparison levels |
| YORK WATER CO | PA7670100 | 206,762 | Surface water | 1 | No available average above comparison levels |
| ZELIENOPLE BORO | PA5100093 | 4,123 | Surface water purchased | 1 | No available average above comparison levels |
How the count works
What is included
Each active community water system with enough required samples for a yearly average is counted once, even if it is linked with several ZIP codes. Private wells are excluded, and UCMR 5 did not comprehensively monitor every small system.