Missouri Water Systems
1,688 community water systems in Missouri, ranked by violation count. Data from EPA Safe Drinking Water Information System (SDWIS).
Water Systems
1,688
Health-Based Violation Records
6,737
Health Violations
576 systems
Population Served
5,882,217
Missouri community water systems are regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act; each utility files compliance results with the state's primacy agency and, for federally listed contaminants, with the U.S. Environmental Protection Agency directly. PlainEnviro's health-based SDWIS extract above counts health-based exceedances only -- monitoring and reporting violations are not present in these figures.
Violation counts reflect both infrastructure realities and reporting diligence, a state with more small rural systems will accumulate more monitoring-type violations without necessarily delivering worse water. Health-based violations are the stronger safety signal. A past violation does not itself indicate current unsafe water; utilities must notify customers, remediate, and publish an annual Consumer Confidence Report. All numbers below draw directly from the federal SDWIS record.
Which water systems have violations? (154)
| # | System Name | Violations | Health |
|---|---|---|---|
| 1 | TERRE DU LAC Des Peres | 162 | Yes |
| 2 | MAYSVILLE PWS Maysville | 131 | Yes |
| 3 | MONROE CITY PWS Monroe | 93 | Yes |
| 4 | LEADWOOD PWS Leadwood | 91 | Yes |
| 5 | FREDERICKTOWN PWS Fredricktown | 63 | Yes |
| 6 | MO AMERICAN GARDEN CITY Joplin | 55 | Yes |
| 7 | LOUISIANA PWS Louisiana | 54 | Yes |
| 8 | BONNE TERRE PWS Bonne Terre | 43 | Yes |
| 9 | FARMINGTON PWS Farmington | 42 | Yes |
| 10 | MO AMERICAN IRONTON Chesterfield | 32 | Yes |
| 11 | KING CITY PWS King City | 32 | Yes |
| 12 | POPLAR BLUFF PWS Poplar Bluff | 30 | Yes |
| 13 | RALLS COUNTY PWSD 1 Hannibal | 28 | Yes |
| 14 | LAF JO SALINE COUNTY CONS PWSD 2 Higginsville | 26 | Yes |
| 15 | POTOSI PWS Potosi | 26 | Yes |
| 16 | SALINE COUNTY PWSD 3 Marshall | 21 | Yes |
| 17 | MEMPHIS PWS Memphis | 21 | Yes |
| 18 | VANDALIA PWS Vandalia | 20 | Yes |
| 19 | COOPER COUNTY CONSOLIDATED PWSD # 1 Boonville | 20 | Yes |
| 20 | HANNIBAL PWS Hannibal | 19 | Yes |
| 21 | LAMAR PWS Lamar | 19 | Yes |
| 22 | NEW FRANKLIN PWS New Franklin | 18 | Yes |
| 23 | ARCHIE PWS Archie | 17 | Yes |
| 24 | MARSHALL PWS Marshall | 16 | Yes |
| 25 | LAKE ROYALE S/D Des Peres | 16 | Yes |
| 26 | KIRKSVILLE PWS Kirksville | 15 | Yes |
| 27 | FAYETTE PWS Fayette | 15 | Yes |
| 28 | LEBANON PWS Lebanon | 12 | Yes |
| 29 | BOONVILLE PWS Boonville | 12 | Yes |
| 30 | LEXINGTON PWS Lexington | 12 | Yes |
| 31 | FARMINGTON CORRECTIONAL CENTER Farmington | 12 | Yes |
| 32 | PERRY COUNTY PWSD 1 Perryville | 12 | Yes |
| 33 | MARYVILLE PWS Maryville | 10 | Yes |
| 34 | SALEM PWS Salem | 10 | Yes |
| 35 | CRYSTAL CITY PWS Crystal City | 10 | Yes |
| 36 | SWEET SPRINGS PWS Sweet Springs | 10 | Yes |
| 37 | DIXON PWS Dixon | 10 | Yes |
| 38 | ANDREW COUNTY PWSD 3 Fillmore | 10 | Yes |
| 39 | HENRY COUNTY PWSD 4 Urich | 10 | Yes |
| 40 | ADRIAN PWS Adrian | 9 | Yes |
| 41 | MAGNOLIA-GREEN ACRES SUBDIVISION Des Peres | 9 | Yes |
| 42 | WEST PLAINS PWS West Plains | 8 | Yes |
| 43 | MARSHFIELD PWS Marshfield | 8 | Yes |
| 44 | GRUNDY COUNTY PWSD 1 Trenton | 8 | Yes |
| 45 | CLINTON COUNTY PWSD 3 Cameron | 8 | Yes |
| 46 | HENRY COUNTY PWSD 3 Clinton | 8 | Yes |
| 47 | HARRY S TRUMAN PWSD 2 Montrose | 8 | Yes |
| 48 | STEELE PWS Steele | 8 | Yes |
| 49 | BISMARCK PWS Bismarck | 7 | Yes |
| 50 | MORGAN COUNTY PWSD # 2 Stover | 7 | Yes |
| 51 | CLARKTON PWS Clarkton | 7 | Yes |
| 52 | MOBERLY PWS Moberly | 6 | Yes |
| 53 | PULASKI COUNTY PWSD 1 Laquey | 6 | Yes |
| 54 | CLAY COUNTY PWSD 3 Holt | 6 | Yes |
| 55 | SOUTHWEST RURAL WATER DISTRICT 1 Exeter | 6 | Yes |
| 56 | CONCORDIA PWS Concordia | 6 | Yes |
| 57 | HOWARD COUNTY CONS PWSD 1 Franklin | 6 | Yes |
| 58 | BIG LAKE VILLAGE OF PWS Craig | 6 | Yes |
| 59 | PIEDMONT PWS Piedmont | 6 | Yes |
| 60 | UNIONVILLE PWS Unionville | 6 | Yes |
| 61 | WELLSGATE Des Peres | 6 | Yes |
| 62 | PLATTE COUNTY PWSD 8 Smithville | 6 | Yes |
| 63 | MOSCOW MILLS PWS Moscow Mills | 5 | Yes |
| 64 | CUBA PWS Cuba | 5 | Yes |
| 65 | AVA PWS Ava | 5 | Yes |
| 66 | BATES COUNTY PWSD 5 Adrian | 5 | Yes |
| 67 | PUTNAM COUNTY PWSD 1 Unionville | 5 | Yes |
| 68 | HAMILTON PWS Hamilton | 5 | Yes |
| 69 | MILAN PWS Milan | 5 | Yes |
| 70 | LINCOLN PWS Lincoln | 5 | Yes |
| 71 | APPLETON CITY PWS Appleton City | 5 | Yes |
| 72 | SMITHVILLE PWS Smithville | 4 | Yes |
| 73 | VERNON COUNTY CONS PWSD 1 Nevada | 4 | Yes |
| 74 | ELDON PWS Eldon | 4 | Yes |
| 75 | HARRISON COUNTY PWSD 2 Bethany | 4 | Yes |
| 76 | MO AMERICAN LAWSON St Joseph | 4 | Yes |
| 77 | HOLT COUNTY PWSD 1 Oregon | 4 | Yes |
| 78 | MINER PWS Miner | 4 | Yes |
| 79 | PULASKI COUNTY PWSD 3 Crocker | 4 | Yes |
| 80 | WASHINGTON PWS Washington | 3 | Yes |
| 81 | ROGERSVILLE PWS Rogersville | 3 | Yes |
| 82 | ST CLAIR PWS St Clair | 3 | Yes |
| 83 | MISSISSIPPI COUNTY PWSD 1 Anniston | 3 | Yes |
| 84 | DUNKLIN COUNTY PWSD 2 Senath | 3 | Yes |
| 85 | BATES COUNTY PWSD 4 Rich Hill | 3 | Yes |
| 86 | CEDAR COUNTY PWSD 1 El Dorando Springs | 3 | Yes |
| 87 | CRANE PWS Crane | 3 | Yes |
| 88 | GENTRY COUNTY PWSD 1 Albany | 3 | Yes |
| 89 | STANBERRY PWS Stanberry | 3 | Yes |
| 90 | JCPSD SUMMER SET Hillsboro | 3 | Yes |
| 91 | ENCOUNTER COVE CAMP & CONFERENCE CENTER Roach | 3 | Yes |
| 92 | BILLINGS PWS Billings | 3 | Yes |
| 93 | SIKESTON PWS Sikeston | 2 | Yes |
| 94 | JACKSON PWS Jackson | 2 | Yes |
| 95 | LINCOLN COUNTY PWSD 1 Winfield | 2 | Yes |
| 96 | CAMERON PWS Cameron | 2 | Yes |
| 97 | EXCELSIOR SPRINGS PWS Excelsior Springs | 2 | Yes |
| 98 | CHARITON LINN COUNTY PWSD 3 Brookfield | 2 | Yes |
| 99 | CALIFORNIA PWS California | 2 | Yes |
| 100 | MAGNOLIA-LAKESHORE ESTATES Des Peres | 2 | Yes |
| 101 | CANTON PWS Canton | 2 | Yes |
| 102 | MERCER COUNTY PWSD 1 Mercer | 2 | Yes |
| 103 | RIPLEY COUNTY PWSD 2 Doniphan | 2 | Yes |
| 104 | RAY COUNTY PWSD 1 Lawson | 2 | Yes |
| 105 | DAVIESS COUNTY PWSD 2 Gallatin | 2 | Yes |
| 106 | ALBANY PWS Albany | 2 | Yes |
| 107 | ELSBERRY PWS Elsberry | 2 | Yes |
| 108 | RICHLAND PWS Richland | 2 | Yes |
| 109 | WESTON PWS Weston | 2 | Yes |
| 110 | CS HARRISBURG UTILITY COMPANY Des Peres | 2 | Yes |
| 111 | BUTLER COUNTY PWSD 2 Qulin | 2 | Yes |
| 112 | BATES COUNTY PWSD 6 Butler | 2 | Yes |
| 113 | INDIAN HILLS UTILITIES OPERATING COMPANY Des Peres | 2 | Yes |
| 114 | SARCOXIE PWS Sarcoxie | 2 | Yes |
| 115 | WINFIELD PWS Winfield | 2 | Yes |
| 116 | ASH GROVE PWS Ash Grove | 2 | Yes |
| 117 | RICH HILL PWS Rich Hill | 2 | Yes |
| 118 | ADVANCE PWS Advance | 2 | Yes |
| 119 | GLASGOW PWS Glasgow | 2 | Yes |
| 120 | LIBERTY UTILITIES VENICE Aurora | 2 | Yes |
| 121 | ARANSAS BAY UTILITIES Des Peres | 2 | Yes |
| 122 | KANSAS CITY PWS Kansas City | 1 | Yes |
| 123 | CAPE GIRARDEAU PWS Cape Girardeau | 1 | Yes |
| 124 | NIXA PWS Nixa | 1 | Yes |
| 125 | WILLARD PWS Willard | 1 | Yes |
| 126 | NODAWAY COUNTY PWSD 1 Maryville | 1 | Yes |
| 127 | RICHMOND PWS Richmond | 1 | Yes |
| 128 | STE GENEVIEVE PWS Ste Genevieve | 1 | Yes |
| 129 | CLINTON CO PWSD 4 SYS 1 Lathrop | 1 | Yes |
| 130 | DUNKLIN COUNTY PWSD 1 Campbell | 1 | Yes |
| 131 | MONTGOMERY CO PWSD 1 Warrenton | 1 | Yes |
| 132 | MALDEN PWS Malden | 1 | Yes |
| 133 | EL DORADO SPRINGS PWS El Dorado Springs | 1 | Yes |
| 134 | PORTAGEVILLE PWS Portageville | 1 | Yes |
| 135 | HILLSBORO PWS Hillsboro | 1 | Yes |
| 136 | WINDSOR PWS Windsor | 1 | Yes |
| 137 | HOLDEN PWS Holden | 1 | Yes |
| 138 | LIVINGSTON COUNTY PWSD 2 Chillicothe | 1 | Yes |
| 139 | CLEVER PWS Clever | 1 | Yes |
| 140 | HOLIDAY HILLS RESORT Aurora | 1 | Yes |
| 141 | LAKE OZARK PWS Lake Ozark | 1 | Yes |
| 142 | CARTERVILLE PWS Carterville | 1 | Yes |
| 143 | SLATER PWS Slater | 1 | Yes |
| 144 | SENATH PWS Senath | 1 | Yes |
| 145 | COLLEGE OF THE OZARKS Point Lookout | 1 | Yes |
| 146 | SALISBURY PWS Salisbury | 1 | Yes |
| 147 | MO AMERICAN WARDSVILLE Cottleville | 1 | Yes |
| 148 | LINN COUNTY CONS PWSD 1 Purdin | 1 | Yes |
| 149 | LINN LIVINGSTON COUNTY PWSD 3 Wheeling | 1 | Yes |
| 150 | CAMDEN COUNTY PWSD 1 Macks Creek | 1 | Yes |
| 151 | ORAN PWS Oran | 1 | Yes |
| 152 | MO EASTERN CORRECTIONAL CENTER Pacific | 1 | Yes |
| 153 | HUMANSVILLE PWS Humansville | 1 | Yes |
| 154 | MO AMERICAN MAPLEWOOD SUBDIVISION Joplin | 1 | Yes |
Systems with No Violations (346)
346 water systems in Missouri have zero recorded violations. Showing the 50 largest by population served.
MO AMERICAN ST LOUIS ST CHARLES COUNTIES (1,111,000) ST LOUIS CITY PWS (304,709) CITY UTILITIES OF SPRINGFIELD (210,898) CITY OF COLUMBIA UTILITIES (126,254) INDEPENDENCE PWS (120,000) ST CHARLES COUNTY PWSD 2 (100,587) LEES SUMMIT PWS (99,400) MO AMERICAN ST JOSEPH (89,171) ST CHARLES PWS (78,961) MO AMERICAN JOPLIN (73,728) BLUE SPRINGS PWS (61,084) ST PETERS PWS (52,575) WENTZVILLE PWS (41,784) UNIVERSITY OF MISSOURI COLUMBIA (40,000) JEFFERSON CO CONS PWSD C 1 (37,000) FORT LEONARD WOOD (34,000) OFALLON PWS (32,515) LIBERTY PWS (30,800) MO AMERICAN JEFFERSON CITY DISTRICT (30,075) KIRKWOOD PWS (28,000) GLADSTONE PWS (27,000) BOONE COUNTY CONS PWSD 1 (24,700) JACKSON COUNTY PWSD 1 (24,500) BELTON PWS (23,598) OZARK PWS (22,000) SEDALIA PWS (21,725) RAYMORE PWS (21,517) JEFFERSON COUNTY PWSD 1 (21,113) ROLLA PWS (20,800) MO AMERICAN WARRENSBURG (18,500) RAYTOWN WATER COMPANY (17,066) JEFFERSON COUNTY PWSD 3 (17,000) MO AMERICAN PLATTE COUNTY (16,645) COLE COUNTY PWSD 1 (16,548) JEFFERSON COUNTY PWSD 2 (16,548) JACKSON COUNTY PWSD 2 (16,440) REPUBLIC PWS (16,100) GRAIN VALLEY PWS (16,000) BOONE COUNTY PWSD 9 (15,035) TROY PWS (15,000) CARTHAGE PWS (14,600) WEBB CITY PWS (13,404) COLE COUNTY PWSD 2 (13,107) CALLAWAY 2 WATER DISTRICT (13,080) MO AMERICAN MEXICO (13,000) FESTUS PWS (13,000) MACON CO PWSD 1 (12,865) BRANSON PWS (12,640) FULTON PWS (12,600) JOHNSON COUNTY PWSD 2 (12,490) +296 more
All Water Systems in Missouri (1,688)
Page 10 of 34, ordered by population served.
Frequently Asked Questions
How many water systems are in Missouri?
Missouri has 1,688 community water systems tracked by the EPA, serving a combined population of 5,882,217 people.
How many water systems in Missouri have health violations?
576 water systems in Missouri have health-based violations, which include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. These represent 34% of all systems in the state.
How many health-based violation records are in this extract for Missouri?
PlainEnviro's health-based EPA SDWIS extract contains 6,737 records joined to 1,688 active community water systems in Missouri. Monitoring and reporting records are not included.
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About This Data
Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Only community water systems (CWS) are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.