Louisiana Water Quality
According to EPA Safe Drinking Water Information System (SDWIS), Louisiana has 815 active community water systems in this extract. PlainEnviro's health-based slice lists 14,536 violation records across 50 systems with at least one such row. These are historical EPA registry counts, not a statewide drinkability score.
Health-based violation records for 815 community water systems in Louisiana. Source: EPA Safe Drinking Water Information System (SDWIS).
Water Systems with Most Health-Based Records
| # | Water System | Health-Based Records | Health |
|---|---|---|---|
| 1 | PENDLETON WATER ASSOCIATION Many | 306 | Yes |
| 2 | TOWN OF FERRIDAY WATER SYSTEM Ferriday | 284 | Yes |
| 3 | VIXEN WATER SYSTEM Columbia | 268 | Yes |
| 4 | TOWN OF OIL CITY WATER SYSTEM Oil City | 247 | Yes |
| 5 | BELLWOOD WATER SYSTEM Provencal | 240 | Yes |
| 6 | FAIRVIEW UNION WATER SYSTEM Coushatta | 209 | Yes |
| 7 | LAKE ST JOHN WATERWORKS DISTRICT 1 Ferriday | 205 | Yes |
| 8 | EBARB WWKS DIST #1 - NORTH EBARB Zwolle | 202 | Yes |
| 9 | RED HILL WATERWORKS INC. Georgetown | 195 | Yes |
| 10 | JONES MCGINTY WATER SYSTEM Bonita | 193 | Yes |
| 11 | WEST WINN WATER SYSTEM INC Winnfield | 193 | Yes |
| 12 | SANDY POINT 480 WATER SYSTEM Campti | 191 | Yes |
| 13 | CITY OF FRANKLIN WATER SUPPLY Franklin | 191 | Yes |
| 14 | TOWN OF NEWELLTON WATER SYSTEM Newellton | 170 | Yes |
| 15 | WARDS CHAPEL WATER SYSTEM Farmerville | 164 | Yes |
| 16 | TOWN OF PLAIN DEALING WATER SYSTEM Plain Dealing | 162 | Yes |
| 17 | VILLAGE OF DOWNSVILLE WATER SYSTEM Downsville | 162 | Yes |
| 18 | ALBERTA WATER SYSTEM Castor | 161 | Yes |
| 19 | VILLAGE OF TULLOS WATER SYSTEM Tullos | 152 | Yes |
| 20 | VILLAGE OF RIDGECREST WATER SUPPLY Ridgecrest | 151 | Yes |
| 21 | SARDIS WATER SYSTEM Gilbert | 147 | Yes |
| 22 | PLEASANT HILLS-CROSSROADS WATER SYSTEMS Joyce | 139 | Yes |
| 23 | UNION SPRINGS WATER SYSTEM Converse | 137 | Yes |
| 24 | EBARB WWKS DIST # 1 - N EBARB/BELMONT Zwolle | 137 | Yes |
| 25 | LITROE WATER SYSTEM Marion | 137 | Yes |
| 26 | SOUTH DESOTO WATER SYSTEM Mansfield | 131 | Yes |
| 27 | VILLAGE OF CLAYTON WATER SYSTEM Clayton | 127 | Yes |
| 28 | PRAIRIE ROAD WATER DISTRICT Monroe | 126 | Yes |
| 29 | TRI-WATER SYSTEM Farmerville | 125 | Yes |
| 30 | PORT SULPHUR WATER DISTRICT Belle Chasse | 123 | Yes |
| 31 | VILLAGE OF CALVIN WATER SYSTEM Calvin | 122 | Yes |
| 32 | CADEVILLE WATER DISTRICT West Monroe | 120 | Yes |
| 33 | CAMERON PARISH WW DISTRICT 7 Creole | 118 | Yes |
| 34 | SALEM WATER SYSTEM Farmerville | 117 | Yes |
| 35 | SPRINGHILL COMMUNITY WATER SYSTEM Ringgold | 115 | Yes |
| 36 | UNION PARISH WATERWORKS DISTRICT 1 Farmerville | 114 | Yes |
| 37 | VILLAGE OF SIKES WATER SYSTEM Sikes | 113 | Yes |
| 38 | BELMONT WATERWORKS INC Belmont | 112 | Yes |
| 39 | VILLAGE OF MOORINGSPORT WATER SYSTEM Mooringsport | 111 | Yes |
| 40 | HICO WATER SYSTEM Dubach | 111 | Yes |
| 41 | EBARB WWKS DIST # 1 - AIMWELL AREA Zwolle | 111 | Yes |
| 42 | SPILLWAY ESTATES WATER SYSTEM Mandeville | 109 | Yes |
| 43 | VILLAGE OF MARION WATER SYSTEM Marion | 108 | Yes |
| 44 | TOWN OF ZWOLLE WATER SYSTEM Zwolle | 107 | Yes |
| 45 | LINVILLE-HAILE WATER SYSTEM Marion | 107 | Yes |
| 46 | TANNEHILL WATER SYSTEM Winnfield | 105 | Yes |
| 47 | HOLUM WATER SYSTEM Grayson | 102 | Yes |
| 48 | TOWN OF BERNICE WATER SYSTEM Bernice | 91 | Yes |
| 49 | DARBONNE WS NORTH Bernice | 91 | Yes |
| 50 | TOWN OF FARMERVILLE WATER SYSTEM Farmerville | 89 | Yes |
Most Common Contaminants in Louisiana
| Contaminant | Violations | Systems Affected |
|---|---|---|
| TTHM | 7,559 | 173 |
| Groundwater Rule | 2,804 | 395 |
| Total Haloacetic Acids (HAA5) | 2,383 | 85 |
| Interim Enhanced Surface Water Treatment Rule | 379 | 18 |
| LEAD AND COPPER RULE REVISIONS | 252 | 172 |
| Revised Total Coliform Rule | 215 | 56 |
| Arsenic | 213 | 10 |
| Coliform (TCR) | 192 | 50 |
| Surface Water Treatment Rule | 152 | 9 |
| Lead and Copper Rule | 147 | 43 |
| CARBON, TOTAL | 122 | 12 |
| Long Term 2 Enhanced Surface Water Treatment Rule | 36 | 11 |
| Chlorine dioxide | 24 | 4 |
| Chlorine | 18 | 2 |
| Coliform (Pre-TCR) | 13 | 4 |
Cities with Water Quality Issues
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About This Data
Water quality data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. Only community water systems (CWS) in Louisiana are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.