Systems reaching a study comparison level
1.9%4 of 209 active community water systems with complete monitoring
All 209 systems had complete monitoring. 4 reached at least one study comparison level; 205 did not. “Study comparison level” means the dated EPA technical cutoff used in this January 2026 research release. It does not determine household exposure, health risk, or current legal compliance.
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ZIP codes are used only to route visitors to public water systems that reported serving them. Confirm the actual provider using a water bill or utility record.
Compound summary
System counts in Mississippi
Each count shows how many included water systems reached the named study level.
| Study comparison | Systems reaching level | Water systems included | Percent |
|---|---|---|---|
| PFOA: study level 4.05 ppt (April 2024 EPA level: 4 ppt) | 4 | 209 | 1.9% |
| PFOS: study level 4.05 ppt (April 2024 EPA level: 4 ppt) | 3 | 209 | 1.4% |
| PFHxS: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 209 | 0.0% |
| PFNA: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 209 | 0.0% |
| HFPO-DA: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 209 | 0.0% |
| Hazard Index: study level 1.5 with at least two detected components (April 2024 EPA level: 1) | 0 | 209 | 0.0% |
System directory
Community water systems with complete monitoring
Each PWSID appears once, preventing double counting across ZIP associations.
| Public water system | PWSID | Population served | Primary source | Sampling locations | Study comparison |
|---|---|---|---|---|---|
| ADAMS CO W/A #2-SOUTH | MS0010009 | 8,097 | Ground water | 5 | Below the study levels |
| ADAMS CO W/A #4-KAISER LAKE | MS0010015 | 8,078 | Ground water | 4 | Below the study levels |
| ALCORN STATE UNIVERSITY | MS0110013 | 3,000 | Ground water | 1 | Below the study levels |
| ALCORN W/A #1-INDIAN SPRINGS | MS0020006 | 5,456 | Ground water | 2 | Below the study levels |
| ALGOMA WATER ASSOCIATION | MS0580001 | 6,879 | Ground water | 5 | Below the study levels |
| ARNOLD LINE WATER ASSOCIATION | MS0370001 | 6,600 | Ground water | 3 | Below the study levels |
| BARRONTOWN W/A | MS0180001 | 7,999 | Ground water | 6 | Below the study levels |
| BEAR CREEK W/A -EAST | MS0450002 | 18,770 | Ground water | 4 | Below the study levels |
| BEAR CREEK W/A-WEST | MS0450021 | 26,677 | Ground water | 5 | Below the study levels |
| BEAT III W/A #1-SAND HILL | MS0210001 | 3,881 | Ground water | 2 | Below the study levels |
| BIG V WATER ASSOCIATION | MS0590002 | 3,878 | Ground water | 3 | Below the study levels |
| BOONEVILLE WATER DEPT. | MS0590004 | 9,995 | Ground water | 3 | Below the study levels |
| BROADMOOR UTILITIES, INC | MS0010005 | 1,185 | Ground water | 1 | Below the study levels |
| CALHOUN WATER ASSOCIATION | MS0340001 | 3,730 | Ground water | 2 | Below the study levels |
| CASON WATER ASSOCIATION | MS0480019 | 4,570 | Surface water purchased | 1 | Below the study levels |
| CENTRAL W/A-EAST SIDE | MS0500004 | 6,442 | Ground water | 1 | Below the study levels |
| CENTRAL W/A-SOUTHWEST | MS0500009 | 5,312 | Ground water | 3 | Below the study levels |
| CITY OF AMORY | MS0480002 | 9,350 | Ground water | 1 | Below the study levels |
| CITY OF BATESVILLE | MS0540002 | 7,463 | Ground water | 7 | Below the study levels |
| CITY OF BAY ST LOUIS | MS0230001 | 9,284 | Ground water | 4 | Below the study levels |
| CITY OF BELZONI | MS0270001 | 4,768 | Ground water | 3 | Below the study levels |
| CITY OF BILOXI | MS0240001 | 23,310 | Ground water | 12 | Below the study levels |
| CITY OF BILOXI-FRENCH | MS0240036 | 4,968 | Ground water | 3 | Below the study levels |
| CITY OF BILOXI-NORTH | MS0240084 | 9,858 | Ground water | 6 | Below the study levels |
| CITY OF BRANDON | MS0610003 | 31,852 | Ground water | 9 | Below the study levels |
| CITY OF BROOKHAVEN | MS0430002 | 12,513 | Ground water | 4 | Below the study levels |
| CITY OF CANTON, MS | MS0450006 | 16,785 | Ground water | 2 | Below the study levels |
| CITY OF CLEVELAND, MS | MS0060006 | 16,392 | Ground water | 4 | Below the study levels |
| CITY OF CLINTON | MS0250003 | 25,000 | Ground water | 11 | Below the study levels |
| CITY OF COLUMBIA | MS0460003 | 5,900 | Ground water | 1 | Below the study levels |
| CITY OF CORINTH, MS | MS0020002 | 15,000 | Surface water | 6 | Reached a study level |
| CITY OF ELLISVILLE | MS0340003 | 4,600 | Ground water | 4 | Below the study levels |
| CITY OF EUPORA | MS0780005 | 5,586 | Ground water | 1 | Below the study levels |
| CITY OF FLOWOOD | MS0610075 | 31,574 | Ground water | 8 | Below the study levels |
| CITY OF FLOWOOD - NORANCO | MS0610044 | 4,274 | Ground water | 2 | Below the study levels |
| CITY OF FOREST | MS0620002 | 5,430 | Ground water | 6 | Below the study levels |
| CITY OF GAUTIER | MS0300004 | 22,253 | Ground water | 9 | Below the study levels |
| CITY OF GREENVILLE, MS | MS0760004 | 29,602 | Ground water | 8 | Below the study levels |
| CITY OF GREENWOOD | MS0420001 | 19,140 | Ground water | 7 | Below the study levels |
| CITY OF GRENADA | MS0220003 | 12,762 | Ground water | 3 | Below the study levels |
| CITY OF GULFPORT | MS0240003 | 75,056 | Ground water | 21 | Below the study levels |
| CITY OF HATTIESBURG | MS0180008 | 43,449 | Ground water | 6 | Below the study levels |
| CITY OF HERNANDO | MS0170009 | 14,457 | Ground water | 1 | Below the study levels |
| CITY OF HERNANDO-JAYBIRD | MS0170002 | 6,750 | Ground water | 1 | Below the study levels |
| CITY OF HOLLY SPRINGS | MS0470002 | 9,779 | Ground water | 2 | Reached a study level |
| CITY OF HORN LAKE | MS0170022 | 13,649 | Ground water | 4 | Below the study levels |
| CITY OF HOUSTON | MS0090005 | 3,772 | Ground water | 3 | Below the study levels |
| CITY OF INDIANOLA | MS0670006 | 9,464 | Ground water | 3 | Below the study levels |
| CITY OF IUKA | MS0710006 | 7,268 | Ground water | 1 | Below the study levels |
| CITY OF JACKSON, MS | MS0250008 | 189,673 | Surface water | 3 | Below the study levels |
| CITY OF JACKSON-MADDOX RD. | MS0250012 | 28,098 | Ground water | 6 | Below the study levels |
| CITY OF LAUREL | MS0340021 | 18,100 | Ground water | 5 | Below the study levels |
| CITY OF LELAND | MS0760006 | 4,591 | Ground water | 2 | Below the study levels |
| CITY OF LONG BEACH | MS0240005 | 18,514 | Ground water | 7 | Below the study levels |
| CITY OF LOUISVILLE | MS0800004 | 7,545 | Ground water | 1 | Below the study levels |
| CITY OF LOUISVILLE - NORTHEAST | MS0800005 | 780 | Ground water | 1 | Below the study levels |
| CITY OF MADISON | MS0450010 | 16,136 | Ground water | 4 | Below the study levels |
| CITY OF MCCOMB | MS0570004 | 12,041 | Ground water | 1 | Below the study levels |
| CITY OF MERIDIAN | MS0380005 | 34,466 | Ground water | 2 | Below the study levels |
| CITY OF MORTON | MS0620009 | 3,400 | Ground water | 4 | Below the study levels |
| CITY OF MOSS POINT | MS0300008 | 12,524 | Ground water | 1 | Below the study levels |
| CITY OF NATCHEZ | MS0010002 | 14,520 | Ground water | 1 | Below the study levels |
| CITY OF NEW ALBANY | MS0730006 | 8,900 | Ground water | 8 | Below the study levels |
| CITY OF NEWTON | MS0510009 | 3,373 | Ground water | 1 | Below the study levels |
| CITY OF OCEAN SPRINGS | MS0300005 | 26,168 | Ground water | 5 | Below the study levels |
| CITY OF OLIVE BRANCH | MS0170015 | 54,025 | Ground water | 6 | Below the study levels |
| CITY OF OXFORD | MS0360011 | 28,500 | Ground water | 5 | Reached a study level |
| CITY OF PASCAGOULA | MS0300006 | 22,686 | Ground water | 3 | Below the study levels |
| CITY OF PASS CHRISTIAN | MS0240009 | 10,436 | Ground water | 5 | Below the study levels |
| CITY OF PEARL | MS0610017 | 27,115 | Ground water | 10 | Below the study levels |
| CITY OF PETAL | MS0180011 | 9,509 | Ground water | 3 | Below the study levels |
| CITY OF PHILADELPHIA | MS0500008 | 6,921 | Ground water | 1 | Below the study levels |
| CITY OF PONTOTOC | MS0580006 | 9,398 | Ground water | 6 | Below the study levels |
| CITY OF POPLARVILLE | MS0550006 | 3,334 | Ground water | 2 | Below the study levels |
| CITY OF RICHLAND | MS0610023 | 7,000 | Ground water | 6 | Below the study levels |
| CITY OF RIPLEY | MS0700008 | 11,351 | Ground water | 8 | Below the study levels |
| CITY OF SARDIS | MS0540018 | 3,439 | Ground water | 2 | Below the study levels |
| CITY OF SENATOBIA | MS0690005 | 8,354 | Ground water | 4 | Below the study levels |
| CITY OF SOUTHAVEN | MS0170018 | 56,000 | Ground water | 4 | Below the study levels |
| CITY OF STARKVILLE | MS0530020 | 32,027 | Ground water | 4 | Below the study levels |
| CITY OF TUPELO | MS0410015 | 37,000 | Surface water purchased | 1 | Below the study levels |
| CITY OF VICKSBURG | MS0750010 | 29,238 | Ground water | 1 | Below the study levels |
| CITY OF WATER VALLEY | MS0810011 | 3,380 | Ground water | 3 | Below the study levels |
| CITY OF WAVELAND | MS0230002 | 6,400 | Ground water | 4 | Below the study levels |
| CITY OF WAYNESBORO | MS0770003 | 4,570 | Ground water | 2 | Below the study levels |
| CITY OF WEST POINT | MS0130008 | 15,062 | Ground water | 5 | Below the study levels |
| CITY OF WIGGINS | MS0660005 | 4,300 | Ground water | 4 | Below the study levels |
| CITY OF WINONA | MS0490010 | 5,071 | Ground water | 1 | Below the study levels |
| CITY OF YAZOO CITY | MS0820014 | 9,913 | Ground water | 5 | Below the study levels |
| CLARKDALE WATER ASSN # 1 | MS0380001 | 4,500 | Ground water | 4 | Below the study levels |
| CLARKSDALE PUBLIC UTILITIES | MS0140002 | 14,903 | Ground water | 7 | Below the study levels |
| CLAYTON VILLAGE W/A #1-EAST | MS0530006 | 4,984 | Ground water | 3 | Below the study levels |
| CMU - LAKE CAROLINE | MS0450034 | 8,511 | Ground water | 3 | Below the study levels |
| COLUMBUS LIGHT & WATER | MS0440003 | 23,616 | Ground water | 2 | Below the study levels |
| COMBINED UTILITIES | MS0200001 | 6,658 | Ground water | 3 | Below the study levels |
| COPIAH-NEW ZION WATER ASSN,INC | MS0150009 | 3,791 | Ground water | 4 | Below the study levels |
| CRYSTAL SPRINGS WATER SERVICE | MS0150003 | 5,961 | Ground water | 1 | Below the study levels |
| CULKIN WATER DIST | MS0750002 | 11,730 | Ground water | 1 | Below the study levels |
| DIAMONDHEAD UTILITIES-NORTH | MS0230005 | 12,577 | Ground water | 4 | Below the study levels |
| DIBERVILLE W/S | MS0240002 | 12,721 | Ground water | 3 | Below the study levels |
| DIXIE COMMUNITY UTILITY ASSN. | MS0180005 | 5,840 | Ground water | 3 | Below the study levels |
| EAST LEFLORE WATER & SEWER DST | MS0420010 | 5,206 | Ground water | 3 | Below the study levels |
| EAST LOWNDES #4-HERMAN-VAUGHN | MS0440100 | 5,678 | Ground water | 1 | Below the study levels |
| EAST LOWNDES W/A #2-HUCKLEBERRY | MS0440080 | 7,035 | Ground water | 1 | Below the study levels |
| EAST LOWNDES W/A A EAST-OLD YORKVILLE | MS0440081 | 4,778 | Ground water | 1 | Below the study levels |
| EAST LOWNDES W/A B WEST-OLD YORKVILLE RD | MS0440103 | 7,355 | Ground water | 1 | Below the study levels |
| EAST MADISON WATER ASSN-WEST | MS0450007 | 7,339 | Ground water | 5 | Below the study levels |
| EAST PONTOTOC WATER ASSN | MS0580002 | 5,170 | Ground water | 4 | Below the study levels |
| EAST QUITMAN W/A | MS0120011 | 3,546 | Ground water | 4 | Below the study levels |
| EUDORA UTILITIES ASSOCIATION | MS0170006 | 3,749 | Ground water | 1 | Below the study levels |
| FANNIN WATER ASSN-NORTH | MS0610008 | 7,690 | Ground water | 5 | Below the study levels |
| FARMINGTON WATER ASSOCIATION | MS0020003 | 6,925 | Ground water | 2 | Below the study levels |
| FISHER FERRY WATER DISTRICT | MS0750004 | 5,094 | Ground water | 1 | Below the study levels |
| G T & Y WATER DISTRICT INC | MS0220002 | 3,907 | Ground water | 4 | Below the study levels |
| GLADE WATERWORKS ASSN | MS0340005 | 3,340 | Ground water | 3 | Below the study levels |
| GLENDALE UTILITY DISTRICT | MS0180007 | 4,477 | Ground water | 3 | Below the study levels |
| GREENFIELD WATER ASSOCIATION | MS0610011 | 6,088 | Ground water | 3 | Below the study levels |
| GULF PARK | MS0300044 | 4,813 | Ground water | 6 | Below the study levels |
| HAMILTON WATER DISTRICT | MS0480007 | 4,029 | Ground water | 2 | Below the study levels |
| HARMONTOWN WATER ASSOCIATION | MS0360007 | 1,393 | Ground water | 2 | Below the study levels |
| HEBRON WATER ASSOCIATION | MS0540008 | 1,146 | Ground water | 3 | Below the study levels |
| HILLDALE WATER DISTRICT | MS0750005 | 5,578 | Ground water | 2 | Below the study levels |
| HORN LAKE WATER ASSOCIATION | MS0170010 | 12,735 | Ground water | 2 | Below the study levels |
| HUB WATER ASSOCIATION | MS0460008 | 3,260 | Ground water | 2 | Below the study levels |
| HUMPHREYS CO. W/A #1-MIDNIGHT | MS0270018 | 544 | Ground water | 2 | Below the study levels |
| J P UTILITY DISTRICT | MS0340007 | 3,839 | Ground water | 5 | Below the study levels |
| JACKSON CO UTILITY AUTHORITY-EAST | MS0300166 | 6,270 | Ground water | 2 | Below the study levels |
| JACKSON CO UTILITY AUTHORITY-WEST | MS0300164 | 6,178 | Ground water | 4 | Below the study levels |
| JAYESS-TOPEKA-TILTON W/A | MS0390001 | 3,450 | Ground water | 1 | Below the study levels |
| KEESLER AIR FORCE BASE | MS0240049 | 8,006 | Ground water | 7 | Below the study levels |
| KILN UTILITY AND FIRE DISTRICT OF HANCOC | MS0230050 | 7,051 | Ground water purchased | 1 | Below the study levels |
| KOSSUTH W/A #3-PINE MOUNTAIN | MS0020007 | 5,830 | Ground water | 5 | Below the study levels |
| LAMAR PARK WATER & SEWAGE ASSN | MS0370004 | 7,714 | Ground water | 4 | Below the study levels |
| LAMPTON WATER ASSOCIATION | MS0460009 | 1,983 | Ground water | 1 | Below the study levels |
| LANGFORD WATER ASSOCIATION | MS0610012 | 4,013 | Ground water | 4 | Below the study levels |
| LEESBURG WATER ASSOCIATION | MS0610013 | 3,836 | Ground water | 3 | Below the study levels |
| LEWISBURG WATER ASSOCIATION | MS0170011 | 9,390 | Ground water | 2 | Below the study levels |
| LEXIE WATER ASSOCIATION, INC. | MS0740004 | 4,290 | Ground water | 1 | Below the study levels |
| LINCOLN RURAL W/A-HEUCKS RET | MS0430030 | 3,778 | Ground water | 2 | Below the study levels |
| LONG CREEK WATER ASSN #2 | MS0380106 | 3,977 | Ground water | 3 | Below the study levels |
| MACON ELECTRIC & WATER DEPT. | MS0520004 | 5,174 | Ground water | 4 | Below the study levels |
| MAGEES CREEK W/A-NORTH | MS0740076 | 9,792 | Ground water | 3 | Below the study levels |
| MARSHALL CO WATER ASSN | MS0470105 | 5,599 | Ground water | 2 | Below the study levels |
| MCNAIR-STAMPLEY W/A #1 | MS0320003 | 1,148 | Ground water | 1 | Below the study levels |
| MOOREVILLE-RICHMOND W/A #1 | MS0410007 | 3,807 | Ground water | 6 | Below the study levels |
| MS STATE UNIVERSITY | MS0530012 | 15,000 | Ground water | 4 | Below the study levels |
| MT GILEAD-IMPROVE WATER ASSN | MS0460012 | 2,416 | Ground water | 1 | Below the study levels |
| NAVAL CONSTRUCTION BATTAL CTR | MS0240060 | 3,347 | Ground water | 3 | Below the study levels |
| NE ITAWAMBA W/A #1-RIDGE | MS0290016 | 2,537 | Ground water | 1 | Below the study levels |
| NESBIT WATER ASSOCIATION | MS0170014 | 5,988 | Ground water | 1 | Below the study levels |
| NORTH HINDS W/A #1-BROWNSVILLE | MS0250015 | 4,277 | Ground water | 3 | Below the study levels |
| NORTH LAMAR WATER ASSOCIATION | MS0370006 | 12,778 | Ground water | 4 | Below the study levels |
| NORTH LAUDERDALE W/A, INC | MS0380006 | 10,544 | Ground water | 4 | Below the study levels |
| NORTH LEE W/A-AUBURN SYSTEM #1 | MS0410001 | 1,088 | Ground water | 3 | Below the study levels |
| NORTH LUMBERTON UTILITY ASSN | MS0370007 | 4,071 | Ground water | 3 | Below the study levels |
| NORTH PIKE WATER ASSOCIATION | MS0570008 | 5,359 | Ground water | 2 | Below the study levels |
| NORTH TALLAHATCHIE W/A | MS0680007 | 3,089 | Ground water | 2 | Below the study levels |
| NTS UTILITY ASSOCIATION | MS0380028 | 5,103 | Ground water | 2 | Below the study levels |
| OAK HILL WATER ASSN | MS0580004 | 4,739 | Ground water | 4 | Below the study levels |
| OKATOMA WATER ASSOCIATION #2 | MS0640022 | 5,866 | Ground water | 5 | Below the study levels |
| PALMER CREEK UTILITY ASSC, INC | MS0240247 | 570 | Ground water | 1 | Below the study levels |
| PEARL RIVER CENTRAL W/A | MS0550005 | 11,830 | Ground water | 4 | Below the study levels |
| PEARL RIVER CENTRAL W/A-BI CO | MS0550058 | 4,406 | Ground water | 2 | Below the study levels |
| PICAYUNE UTILITIES, CITY OF | MS0550004 | 11,859 | Ground water | 3 | Below the study levels |
| PLEASANT GROVE WATER ASSN | MS0540016 | 747 | Ground water purchased | 1 | Below the study levels |
| PLEASANT RIDGE W/A | MS0340014 | 5,808 | Ground water | 3 | Below the study levels |
| PROGRESS COMM WATER ASSN | MS0370008 | 7,017 | Ground water | 3 | Below the study levels |
| PRVWSD-PELAHATCHIE BAY | MS0610036 | 11,790 | Ground water | 3 | Below the study levels |
| QUINCY WATER ASSOCIATION #1 | MS0480011 | 3,519 | Ground water | 1 | Below the study levels |
| RANDOLPH WATER ASSOCIATION #1 | MS0580007 | 1,299 | Ground water | 3 | Below the study levels |
| REEDTOWN WATER ASSN | MS0250021 | 3,260 | Ground water | 4 | Below the study levels |
| S MS PUBLIC WATER AUTH-ROCK HILL | MS0180022 | 803 | Ground water | 1 | Below the study levels |
| SEBASTOPOL WATER ASSOCIATION | MS0620010 | 6,207 | Ground water | 5 | Below the study levels |
| SOUTH CENTRAL WATER ASSN | MS0250022 | 12,260 | Ground water | 2 | Below the study levels |
| SOUTHERN RANKIN W/A #2 PLAIN | MS0610024 | 3,810 | Ground water | 2 | Below the study levels |
| SOUTHWEST COVINGTON W/A | MS0160009 | 3,601 | Ground water | 2 | Below the study levels |
| SOUTHWEST JONES W/A-NORTH | MS0340019 | 6,690 | Ground water | 4 | Below the study levels |
| STANDARD DEDEAUX WATER ASSOCIATION | MS0230063 | 5,386 | Ground water | 3 | Below the study levels |
| STENNIS SPACE CENTER | MS0230015 | 4,700 | Ground water | 4 | Below the study levels |
| STRAYHORN W/A-CROCKETT | MS0690006 | 2,801 | Ground water | 4 | Below the study levels |
| STRINGER WATER WORKS | MS0310012 | 3,556 | Ground water | 4 | Below the study levels |
| SUNNYHILL WATER ASSOCIATION | MS0570014 | 3,833 | Ground water | 3 | Below the study levels |
| SUNRISE UTILITY ASSN INC | MS0180013 | 6,067 | Ground water | 3 | Below the study levels |
| SW RANKIN WATER ASSOCIATION #1 | MS0610026 | 3,128 | Ground water | 2 | Below the study levels |
| TALLAHALA W/A-ANTIOCH | MS0310001 | 3,427 | Ground water | 6 | Below the study levels |
| TOOMSUBA WATER ASSOCIATION | MS0380009 | 3,828 | Ground water | 3 | Below the study levels |
| TOPISAW CREEK | MS0430029 | 5,349 | Ground water | 3 | Below the study levels |
| TOWN OF ABERDEEN | MS0480001 | 7,783 | Ground water | 11 | Below the study levels |
| TOWN OF BAY SPRINGS | MS0310002 | 2,925 | Ground water | 5 | Below the study levels |
| TOWN OF CALEDONIA | MS0440002 | 6,589 | Ground water | 2 | Below the study levels |
| TOWN OF DUNCAN | MS0060008 | 341 | Ground water | 2 | Below the study levels |
| TOWN OF FLORENCE | MS0610009 | 5,824 | Ground water | 3 | Below the study levels |
| TOWN OF GUNTOWN | MS0410006 | 3,577 | Ground water | 3 | Below the study levels |
| TOWN OF PLANTERSVILLE | MS0410011 | 1,845 | Ground water | 3 | Below the study levels |
| TOWN OF PORT GIBSON | MS0110005 | 3,047 | Ground water | 1 | Below the study levels |
| TOWN OF RENOVA | MS0060015 | 1,357 | Ground water | 1 | Below the study levels |
| TOWN OF SALTILLO | MS0410012 | 6,766 | Surface water purchased | 1 | Below the study levels |
| TOWN OF TUNICA | MS0720004 | 4,689 | Ground water | 3 | Below the study levels |
| TOWN OF TUTWILER | MS0680010 | 1,040 | Ground water | 3 | Below the study levels |
| TOWN OF WALNUT | MS0700011 | 1,449 | Ground water | 2 | Below the study levels |
| TUNICA COUNTY UTILITY DISTRICT | MS0720024 | 6,690 | Ground water | 8 | Below the study levels |
| UNION CHURCH WATERWORKS ASSN | MS0320004 | 1,456 | Ground water | 1 | Below the study levels |
| UNIVERSITY OF MISSISSIPPI | MS0360015 | 26,874 | Ground water | 3 | Reached a study level |
| WALLERVILLE WATER ASSOCIATION | MS0730009 | 2,886 | Ground water | 3 | Below the study levels |
| WALLS WATER ASSN- LAKE FOREST | MS0170043 | 9,298 | Ground water | 1 | Below the study levels |
| WEST JACKSON CO UTILITY DIST | MS0300156 | 28,544 | Ground water | 14 | Below the study levels |
| WEST LAMAR WATER ASSN #1 | MS0370011 | 18,491 | Ground water | 6 | Below the study levels |
| WHEELER-FRANKSTOWN WATER ASSN | MS0590014 | 4,203 | Ground water | 5 | Below the study levels |
| WHISTLER WATER ASSOCIATION | MS0770004 | 4,116 | Ground water | 3 | Below the study levels |
How the count works
What is included
Each active community water system with complete monitoring 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. This page does not apply Mississippi's state-specific standards or determine compliance. Use the official state or territory drinking-water program for current regulatory information.