Systems with a yearly average above an EPA comparison level
34.9%53 of 152 active community water systems
All 152 systems met the sampling requirement for a yearly average. Of those systems, 53 had at least one yearly average above an EPA comparison level and 99 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. South Carolina may use different current standards or guidance. These UCMR 5 results do not determine current federal or state compliance. Find the official South Carolina drinking-water program →
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Find your water system
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 South Carolina
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 | 32 | 152 | 21.1% |
| PFOS: 4 ppt level; unrounded average ≥4.05 ppt after applying EPA rounding | 47 | 152 | 30.9% |
| PFHxS: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 1 | 152 | 0.7% |
| PFNA: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 0 | 152 | 0.0% |
| HFPO-DA: 10 ppt level; unrounded average ≥15 ppt after applying EPA rounding | 7 | 152 | 4.6% |
| Hazard Index: 1 level; unrounded index ≥1.5 and at least two detected components | 7 | 152 | 4.6% |
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 |
|---|---|---|---|---|---|
| ABBEVILLE CITY OF | SC0110001 | 5,650 | Surface water | 1 | Above an EPA comparison level |
| AIKEN CITY OF (0210001) | SC0210001 | 51,533 | Surface water | 5 | No available average above comparison levels |
| ALLENDALE TOWN OF (SC0310001) | SC0310001 | 3,882 | Ground water | 3 | No available average above comparison levels |
| ALLIGATOR RURAL WATER (SC1320004) | SC1320004 | 4,743 | Ground water | 1 | No available average above comparison levels |
| AMICKS FERRY WTR SYSTEM (3250077) | SC3250077 | 3,937 | Surface water purchased | 1 | No available average above comparison levels |
| ANDREWS TOWN OF (SC2210003) | SC2210003 | 3,450 | Ground water | 3 | No available average above comparison levels |
| BAMBERG PUBLIC WORKS (0510001) | SC0510001 | 3,735 | Ground water | 2 | No available average above comparison levels |
| BARNWELL TOWN OF (SC0610001) | SC0610001 | 4,693 | Ground water | 5 | No available average above comparison levels |
| BATESBURG LEESVILLE DPW (3210002) | SC3210002 | 6,814 | Surface water purchased | 1 | Above an EPA comparison level |
| BCWSA EAST COOPER (0820009) | SC0820009 | 12,933 | Surface water purchased | 1 | Above an EPA comparison level |
| BEECH ISLAND W/D (SC0220004) | SC0220004 | 8,935 | Ground water | 6 | No available average above comparison levels |
| BELTON CITY OF (SC0410004) | SC0410004 | 6,762 | Surface water purchased | 1 | Above an EPA comparison level |
| BENNETTSVILLE CITY OF (SC3410001) | SC3410001 | 9,168 | Surface water | 4 | No available average above comparison levels |
| BETHLEHEM-ROANOKE W/D (3920003) | SC3920003 | 6,334 | Surface water purchased | 2 | No available average above comparison levels |
| BGWC I-20 (3250012) | SC3250012 | 7,146 | Surface water purchased | 1 | Above an EPA comparison level |
| BIG CREEK W/S DISTRICT (0420009) | SC0420009 | 13,647 | Surface water purchased | 2 | No available average above comparison levels |
| BISHOPVILLE TOWN OF (3110001) | SC3110001 | 3,810 | Ground water | 5 | No available average above comparison levels |
| BJW&SA (0720003) | SC0720003 | 164,829 | Surface water | 9 | Above an EPA comparison level |
| BLACKSBURG TOWN OF (1110002) | SC1110002 | 4,496 | Surface water purchased | 1 | Above an EPA comparison level |
| BLUE RIDGE WATER CO INC (SC2320003) | SC2320003 | 40,006 | Surface water purchased | 2 | No available average above comparison levels |
| BRANCHVILLE TOWN OF (3810005) | SC3810005 | 1,218 | Ground water | 1 | No available average above comparison levels |
| BREEZY HILL W/D (0220006) | SC0220006 | 21,197 | Surface water | 4 | No available average above comparison levels |
| BROAD CREEK PSD (0720009) | SC0720009 | 3,481 | Surface water purchased | 4 | No available average above comparison levels |
| BROADWAY W&S DISTRICT (0420008) | SC0420008 | 9,586 | Surface water purchased | 1 | No available average above comparison levels |
| BUCKSPORT WATER COMPANY (SC2620003) | SC2620003 | 17,123 | Ground water | 6 | No available average above comparison levels |
| CAMDEN CITY OF (2810001) | SC2810001 | 19,076 | Surface water | 1 | Above an EPA comparison level |
| CASSATT WTR KERSHAW-LEE CO RWA | SC2820005 | 25,485 | Ground water | 13 | No available average above comparison levels |
| CAYCE CITY OF (3210003) | SC3210003 | 17,460 | Surface water | 1 | Above an EPA comparison level |
| CENTRAL TOWN OF (3910005) | SC3910005 | 3,495 | Surface water purchased | 2 | No available average above comparison levels |
| CHARLESTON WATER SYSTEM (SC1010001) | SC1010001 | 327,422 | Surface water | 1 | Above an EPA comparison level |
| CHERAW TOWN OF (1310001) | SC1310001 | 6,325 | Surface water | 1 | No available average above comparison levels |
| CHESTER METROPOLITAN DISTRICT (1220002) | SC1220002 | 15,668 | Surface water | 1 | No available average above comparison levels |
| CHESTERFIELD CO RURAL WATER (SC1320003) | SC1320003 | 25,691 | Ground water purchased | 1 | No available average above comparison levels |
| CLEMSON CITY OF (SC3910004) | SC3910004 | 17,896 | Surface water purchased | 1 | No available average above comparison levels |
| CLEMSON UNIVERSITY (SC3910006) | SC3910006 | 8,320 | Surface water purchased | 1 | No available average above comparison levels |
| CLINTON CITY OF (3010002) | SC3010002 | 8,938 | Surface water | 1 | Above an EPA comparison level |
| CLOVER TOWN OF (4610006) | SC4610006 | 8,400 | Surface water purchased | 1 | No available average above comparison levels |
| COLUMBIA CITY OF (SC4010001) | SC4010001 | 354,068 | Surface water | 2 | Above an EPA comparison level |
| DACUSVILLE-CEDARROCK WT CO (SC3920008) | SC3920008 | 8,700 | Surface water purchased | 2 | No available average above comparison levels |
| DALZELL WATER DISTRICT (SC4320001) | SC4320001 | 3,912 | Ground water | 1 | No available average above comparison levels |
| DANIEL MORGAN WATER DISTRICT (1120001) | SC1120001 | 5,746 | Surface water purchased | 2 | No available average above comparison levels |
| DARLINGTON CITY OF (SC1610001) | SC1610001 | 7,142 | Ground water | 4 | No available average above comparison levels |
| DARLINGTON COUNTY W&SA (1620001) | SC1620001 | 52,288 | Ground water | 3 | No available average above comparison levels |
| DCWA CALOMET VALLEY (1850009) | SC1850009 | 275 | Surface water purchased | 1 | Above an EPA comparison level |
| DCWA KNIGHTSVILLE (1820001) | SC1820001 | 40,141 | Surface water purchased | 5 | Above an EPA comparison level |
| DCWS ASHLEY PHOSPHATE (1820008) | SC1820008 | 26,536 | Surface water purchased | 1 | Above an EPA comparison level |
| DENMARK TOWN OF (0510002) | SC0510002 | 3,500 | Ground water | 3 | No available average above comparison levels |
| DILLON CITY OF (SC1710001) | SC1710001 | 6,998 | Ground water | 4 | No available average above comparison levels |
| DONALDS-DUE WEST W&SA (SC0120001) | SC0120001 | 5,200 | Surface water purchased | 2 | Above an EPA comparison level |
| DRAYTONVILLE WATER DIST (1120003) | SC1120003 | 5,456 | Surface water purchased | 1 | Above an EPA comparison level |
| EASLEY COMBINED UTIL (SC3910002) | SC3910002 | 36,098 | Surface water | 1 | No available average above comparison levels |
| EDGEFIELD CO W&SA (1920001) | SC1920001 | 29,200 | Surface water | 1 | No available average above comparison levels |
| EDISTO BEACH TOWN OF (SC1510006) | SC1510006 | 5,848 | Ground water | 1 | No available average above comparison levels |
| ELECTRIC CITY UTILITIES (0410012) | SC0410012 | 38,204 | Surface water purchased | 1 | No available average above comparison levels |
| FLORENCE CITY OF (SC2110001) | SC2110001 | 79,745 | Surface water | 13 | Above an EPA comparison level |
| FOLLY BEACH CITY OF (1010005) | SC1010005 | 5,086 | Surface water purchased | 1 | Above an EPA comparison level |
| FORT JACKSON (4010501) | SC4010501 | 31,000 | Surface water purchased | 1 | Above an EPA comparison level |
| FORT MILL TOWN OF (SC4610003) | SC4610003 | 25,000 | Surface water purchased | 1 | No available average above comparison levels |
| FRIPP ISLAND PSD (0720002) | SC0720002 | 3,536 | Surface water purchased | 1 | Above an EPA comparison level |
| GAFFNEY BPW (1110001) | SC1110001 | 24,290 | Surface water | 1 | Above an EPA comparison level |
| GASTON RURAL WATER DIST (SC3220002) | SC3220002 | 7,550 | Ground water | 7 | No available average above comparison levels |
| GCWSD KILSOCK WATER SYS (SC2220002) | SC2220002 | 4,417 | Ground water | 5 | No available average above comparison levels |
| GCWSD WACCAMAW NECK (SC2220010) | SC2220010 | 41,300 | Surface water | 1 | Above an EPA comparison level |
| GEORGETOWN CITY OF (2210001) | SC2210001 | 9,092 | Surface water | 1 | Above an EPA comparison level |
| GEORGETOWN RURAL COMM WA (2220001) | SC2220001 | 4,941 | Ground water | 3 | No available average above comparison levels |
| GILBERT-SUMMIT WD (3220001) | SC3220001 | 10,400 | Ground water | 8 | No available average above comparison levels |
| GOUCHER WD (1120004) | SC1120004 | 5,323 | Surface water purchased | 2 | Above an EPA comparison level |
| GRASSY POND WATER CO (1120002) | SC1120002 | 9,895 | Surface water purchased | 2 | Above an EPA comparison level |
| GREENVILLE WATER (2310001) | SC2310001 | 426,057 | Surface water | 2 | No available average above comparison levels |
| GREENWOOD CPW (2410001) | SC2410001 | 52,022 | Surface water | 1 | Above an EPA comparison level |
| GREER CPW (SC2310005) | SC2310005 | 54,024 | Surface water | 1 | No available average above comparison levels |
| GSW&SA (SC2620004) | SC2620004 | 252,840 | Surface water | 7 | Above an EPA comparison level |
| GSW&SA-MARION CITY OF (3310001) | SC3310001 | 9,104 | Ground water | 7 | No available average above comparison levels |
| HAMMOND W/D (SC0420007) | SC0420007 | 21,193 | Surface water purchased | 1 | No available average above comparison levels |
| HARTSVILLE CITY OF (SC1610003) | SC1610003 | 8,711 | Ground water | 4 | No available average above comparison levels |
| HEMINGWAY TOWN OF (SC4510004) | SC4510004 | 3,191 | Ground water | 3 | No available average above comparison levels |
| HILTON HEAD PSD 1 (0720006) | SC0720006 | 25,558 | Surface water purchased | 6 | No available average above comparison levels |
| HOMELAND PARK W/D (0420001) | SC0420001 | 7,328 | Surface water purchased | 1 | No available average above comparison levels |
| HONEA PATH TOWN OF (0410003) | SC0410003 | 4,386 | Surface water purchased | 2 | Above an EPA comparison level |
| INMAN CAMPOBELLO W/D (4220002) | SC4220002 | 41,007 | Surface water purchased | 1 | No available average above comparison levels |
| ISLE OF PALMS W/S COMM (SC1010004) | SC1010004 | 9,530 | Surface water purchased | 2 | Above an EPA comparison level |
| JACKSON TOWN OF (0210002) | SC0210002 | 3,660 | Ground water | 2 | No available average above comparison levels |
| JOHNSONVILLE CITY OF (SC2110011) | SC2110011 | 5,083 | Ground water | 4 | No available average above comparison levels |
| JOINT MUNICIPAL WSC (3220003) | SC3220003 | 47,838 | Surface water purchased | 1 | Above an EPA comparison level |
| KEOWEE KEY UTILITY SYSTEM INC (3750023) | SC3750023 | 4,108 | Surface water purchased | 1 | No available average above comparison levels |
| KIAWAH ISLAND UTILITY (SC1010008) | SC1010008 | 9,550 | Surface water purchased | 1 | Above an EPA comparison level |
| KINGSTREE TOWN OF (4510002) | SC4510002 | 6,009 | Ground water | 5 | No available average above comparison levels |
| LAKE CITY CITY OF (SC2110007) | SC2110007 | 9,191 | Ground water | 6 | No available average above comparison levels |
| LAKE VIEW TOWN OF (SC1710003) | SC1710003 | 1,293 | Ground water purchased | 1 | No available average above comparison levels |
| LAKEWOOD CAMPGROUND (2660049) | SC2660049 | 4,415 | Ground water | 3 | No available average above comparison levels |
| LAMAR TOWN OF (SC1610004) | SC1610004 | 1,034 | Ground water purchased | 1 | No available average above comparison levels |
| LANCASTER CITY OF (SC2910001) | SC2910001 | 14,074 | Surface water purchased | 1 | No available average above comparison levels |
| LANCASTER COUNTY W&SD (2920001) | SC2920001 | 79,107 | Surface water purchased | 1 | No available average above comparison levels |
| LAURENS COUNTY W&S COMM (SC3020001) | SC3020001 | 44,866 | Surface water | 3 | Above an EPA comparison level |
| LCF WATER DISTRICT (SC4220010) | SC4220010 | 18,152 | Surface water purchased | 1 | No available average above comparison levels |
| LEXINGTON TOWN OF (3210001) | SC3210001 | 24,284 | Surface water purchased | 1 | Above an EPA comparison level |
| LIBERTY CITY OF (SC3910003) | SC3910003 | 3,349 | Surface water purchased | 1 | No available average above comparison levels |
| LUGOFF ELGIN WATER AUTH (2820001) | SC2820001 | 25,783 | Surface water | 1 | Above an EPA comparison level |
| MANNING TOWN OF (1410002) | SC1410002 | 5,908 | Ground water | 4 | No available average above comparison levels |
| MARCO RURAL WATER CO (SC3320001) | SC3320001 | 17,120 | Ground water | 7 | No available average above comparison levels |
| MARLBORO WATER CO (SC3420001) | SC3420001 | 5,360 | Ground water | 2 | No available average above comparison levels |
| MCCORMICK CO W&SA (SC3520002) | SC3520002 | 8,500 | Surface water purchased | 3 | Above an EPA comparison level |
| MEANSVILLE RILEY W/D (SC4420001) | SC4420001 | 7,368 | Surface water purchased | 3 | Above an EPA comparison level |
| METRO SUBDISTRICT B (4220003) | SC4220003 | 1,851 | Surface water purchased | 1 | No available average above comparison levels |
| MIDCOUNTY WATER DIST 2 (2020004) | SC2020004 | 3,500 | Surface water purchased | 1 | Above an EPA comparison level |
| MONCKS CORNER CITY OF (SC0810001) | SC0810001 | 8,956 | Surface water purchased | 1 | Above an EPA comparison level |
| MONTMORENCI W/D (0220008) | SC0220008 | 3,837 | Ground water | 2 | No available average above comparison levels |
| MT PLEASANT WATER WORKS (1010002) | SC1010002 | 91,500 | Surface water purchased | 5 | Above an EPA comparison level |
| MULLINS CITY OF (3310002) | SC3310002 | 7,366 | Ground water | 5 | No available average above comparison levels |
| MYRTLE BEACH CITY OF (SC2610001) | SC2610001 | 49,375 | Surface water purchased | 1 | No available average above comparison levels |
| N MYRTLE BEACH CITY OF (SC2610011) | SC2610011 | 43,883 | Surface water purchased | 4 | Above an EPA comparison level |
| NEW ELLENTON-CPW (0210007) | SC0210007 | 7,277 | Ground water | 2 | No available average above comparison levels |
| NEWBERRY CITY OF (3610001) | SC3610001 | 9,947 | Surface water | 1 | Above an EPA comparison level |
| NEWBERRY CO W&SA (3620002) | SC3620002 | 11,157 | Surface water | 1 | Above an EPA comparison level |
| OCEAN LAKES LTD (2660048) | SC2660048 | 10,727 | Surface water purchased | 3 | No available average above comparison levels |
| ORANGEBURG DPU (3810001) | SC3810001 | 47,463 | Surface water | 1 | No available average above comparison levels |
| PENDLETON TOWN OF (SC0410006) | SC0410006 | 5,597 | Surface water purchased | 1 | No available average above comparison levels |
| PICKENS WTP (3910001) | SC3910001 | 10,263 | Surface water purchased | 1 | No available average above comparison levels |
| PIONEER RURAL WATER DIST (SC3720001) | SC3720001 | 16,929 | Surface water | 1 | No available average above comparison levels |
| POWDERSVILLE WATER DISTRICT (SC0420002) | SC0420002 | 34,960 | Surface water purchased | 2 | No available average above comparison levels |
| ROCK HILL CITY OF (SC4610002) | SC4610002 | 89,850 | Surface water | 1 | No available average above comparison levels |
| SALUDA CO W&S AUTHORITY (4120001) | SC4120001 | 4,535 | Surface water | 1 | Above an EPA comparison level |
| SALUDA CPW (4110001) | SC4110001 | 3,390 | Surface water purchased | 1 | Above an EPA comparison level |
| SANDY SPRINGS WATER CO INC (SC0420003) | SC0420003 | 17,311 | Surface water purchased | 2 | No available average above comparison levels |
| SEABROOK ISLAND TOWN OF (1010009) | SC1010009 | 5,939 | Surface water purchased | 1 | Above an EPA comparison level |
| SENECA CITY OF (3710002) | SC3710002 | 39,772 | Surface water | 1 | No available average above comparison levels |
| SHAW AFB (SC4310501) | SC4310501 | 10,000 | Ground water | 4 | Above an EPA comparison level |
| SILVER LAKE MHP (SC3260022) | SC3260022 | 122 | Ground water | 1 | No available average above comparison levels |
| SJWD MIDDLE TYGER WTP (4220006) | SC4220006 | 89,531 | Surface water | 1 | No available average above comparison levels |
| SOUTH ISLAND PSD (SC0720001) | SC0720001 | 18,299 | Ground water | 6 | No available average above comparison levels |
| SOUTHSIDE W/D (3920010) | SC3920010 | 9,568 | Surface water purchased | 3 | No available average above comparison levels |
| SPARTANBURG WATER SYSTEM (4210001) | SC4210001 | 166,364 | Surface water | 1 | No available average above comparison levels |
| ST JOHN'S WATER (SC1020002) | SC1020002 | 22,592 | Surface water purchased | 1 | Above an EPA comparison level |
| STARR-IVA W/D (SC0420005) | SC0420005 | 11,125 | Surface water purchased | 1 | No available average above comparison levels |
| SUMMERVILLE CPW (SC1810003) | SC1810003 | 81,750 | Surface water purchased | 1 | Above an EPA comparison level |
| SUMTER CITY OF (SC4310001) | SC4310001 | 53,070 | Ground water | 6 | No available average above comparison levels |
| SWS-LANDRUM WTP (SC4210003) | SC4210003 | 5,143 | Surface water | 1 | No available average above comparison levels |
| TEGA CAY CITY OF (SC4610008) | SC4610008 | 10,500 | Surface water purchased | 1 | No available average above comparison levels |
| TRICO WATER COMPANY (SC1720001) | SC1720001 | 17,963 | Ground water | 5 | No available average above comparison levels |
| UNION CITY OF (4410001) | SC4410001 | 13,076 | Surface water | 1 | Above an EPA comparison level |
| VALLEY PSA (SC0220012) | SC0220012 | 7,752 | Ground water | 5 | No available average above comparison levels |
| WALTERBORO CITY OF (1510004) | SC1510004 | 11,829 | Ground water | 11 | No available average above comparison levels |
| WARE SHOALS TOWN OF (2410003) | SC2410003 | 3,174 | Surface water purchased | 1 | Above an EPA comparison level |
| WCWSA (SC4510007) | SC4510007 | 7,099 | Ground water | 4 | No available average above comparison levels |
| WEST ANDERSON W/D (0420006) | SC0420006 | 17,430 | Surface water purchased | 1 | No available average above comparison levels |
| WEST COLUMBIA CITY OF (3210004) | SC3210004 | 34,028 | Surface water | 2 | Above an EPA comparison level |
| WESTMINSTER CITY OF (3710003) | SC3710003 | 9,588 | Surface water | 2 | No available average above comparison levels |
| WILLIAMSTON TOWN OF (0410010) | SC0410010 | 6,693 | Surface water purchased | 1 | No available average above comparison levels |
| WINNSBORO TOWN OF (2010001) | SC2010001 | 10,391 | Surface water | 1 | Above an EPA comparison level |
| WOODRUFF ROEBUCK W/D (4220007) | SC4220007 | 32,038 | Surface water | 1 | No available average above comparison levels |
| YORK CITY OF (4610001) | SC4610001 | 11,137 | Surface water purchased | 1 | No available average above comparison levels |
| York County West WD | SC4620003 | 18,273 | 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.