Missouri Drinking Water Compliance Records
1,432 water systems serving 5,707,087 people. 18,854 historical EPA violation records in the Q2 2026 snapshot.
TapScore Compliance-History Grades
A
711
50%
B
366
26%
C
280
20%
D
67
5%
F
8
1%
1,432
Water Systems
5,707,087
Population Served
18,854
Historical Records
4,742
Health-Based (All Years)
Systems With the Most Recent EPA Records
AIRPORT VILLAGE MHP
42 served129 historical records77 recent
C
CRESTVIEW MHP
35 served242 historical records68 recent
D
FROHNA PWS
250 served92 historical records66 recent
C
OZARK PARK ESTATES
150 served121 historical records58 recent
D
FREEBURG PWS
450 served49 historical records46 recent
C
LAKE SHERWOOD SUBD
1,100 served52 historical records45 recent
C
STARLIGHT VILLAGE
65 served224 historical records42 recent
D
SENATH PWS
1,767 served53 historical records40 recent
D
FENNEC FOX WAY LLC
70 served54 historical records40 recent
C
MO ARK WATER CO
1,478 served89 historical records39 recent
C
Large Systems With No Recent Records
MO AMERICAN ST LOUIS ST CHARLES COUNTIES
1,111,000 served0 historical records
A
ST LOUIS CITY PWS
304,709 served1 historical record
A
CITY UTILITIES OF SPRINGFIELD
210,898 served0 historical records
A
CITY OF COLUMBIA UTILITIES
126,254 served0 historical records
A
ST CHARLES COUNTY PWSD 2
100,587 served1 historical record
A
MO AMERICAN ST JOSEPH
89,171 served1 historical record
A
MO AMERICAN JOPLIN
73,728 served1 historical record
A
ST PETERS PWS
52,575 served2 historical records
A
UNIVERSITY OF MISSOURI COLUMBIA
40,000 served4 historical records
A
JEFFERSON CO CONS PWSD C 1
37,000 served2 historical records
A
Largest Water Systems in Missouri
| Water System | Grade | Population | Historical Records |
|---|---|---|---|
| MO AMERICAN ST LOUIS ST CHARLES COUNTIES | A | 1,111,000 | 0 |
| KANSAS CITY PWS | B | 553,295 | 3 |
| ST LOUIS CITY PWS | A | 304,709 | 1 |
| CITY UTILITIES OF SPRINGFIELD | A | 210,898 | 0 |
| CITY OF COLUMBIA UTILITIES | A | 126,254 | 0 |
| INDEPENDENCE PWS | B | 120,000 | 3 |
| ST CHARLES COUNTY PWSD 2 | A | 100,587 | 1 |
| LEES SUMMIT PWS | C | 99,400 | 8 |
| MO AMERICAN ST JOSEPH | A | 89,171 | 1 |
| ST CHARLES PWS | B | 78,961 | 5 |
| MO AMERICAN JOPLIN | A | 73,728 | 1 |
| BLUE SPRINGS PWS | B | 61,084 | 4 |
| ST PETERS PWS | A | 52,575 | 2 |
| WENTZVILLE PWS | B | 41,784 | 6 |
| UNIVERSITY OF MISSOURI COLUMBIA | A | 40,000 | 4 |
| CAPE GIRARDEAU PWS | C | 39,941 | 6 |
| JEFFERSON CO CONS PWSD C 1 | A | 37,000 | 2 |
| FORT LEONARD WOOD | A | 34,000 | 1 |
| OFALLON PWS | B | 32,515 | 3 |
| LIBERTY PWS | C | 30,800 | 31 |
Contaminants in Missouri
Lead in MissouriArsenic in MissouriNitrate in MissouriFluoride in MissouriPFOS in MissouriPFOA in MissouriTHMs in MissouriHAA5 in Missouri
Cities in Missouri
CHESTERFIELD(4)KANSAS CITY(3)ST. LOUIS(4)ST LOUIS(4)SPRINGFIELD(18)COLUMBIA(7)INDEPENDENCE(3)LEES SUMMIT(4)JOPLIN(31)ST JOSEPH(6)O'FALLON(10)DEKALB(3)ST. JOSEPH(1)ANDREW(1)WATHENA, KS(1)ELWOOD, KS(1)ST CHARLES(1)ST. CHARLES(1)JEFFERSON CITY(7)BLUE SPRINGS(1)ST PETERS(1)ST. PETERS(1)CAPE GIRARDEAU(12)WENTZVILLE(2)ARNOLD(5)LIBERTY(6)BARNHART(1)FORT LEONARD WOOD(1)RAYTOWN(2)O FALLON(2)BELTON(8)AURORA(25)LEBANON(4)BRANSON(18)POPLAR BLUFF(4)NIXA(8)KIRKWOOD(1)RAYMORE(4)GLADSTONE(1)WARRENSBURG(3)FULTON(3)KIRKSVILLE(2)MOBERLY(2)HANNIBAL(2)GRANDVIEW(1)JACKSON(4)FARMINGTON(6)ROLLA(7)SEDALIA(11)OZARK(7)RAYMOOR(1)PARKVILLE(3)KEARNEY(3)GRAIN VALLEY(2)LAKE LOTAWANA(2)MACON(2)HARRISONVILLE(3)SIKESTON(4)NEVADA(2)WASHINGTON(5)CLINTON(5)MARYVILLE(3)TROY(14)MEXICO(2)COTTLEVILLE(8)HIGH RIDGE(4)WEBB CITY(2)EUREKA(3)PARKDALE(1)MURPHY(1)REPUBLIC(2)MARSHALL(3)FESTUS(5)WEST PLAINS(5)CHILLICOTHE(4)CAMERON(3)WINFIELD(2)HOLDEN(2)RICHMOND(2)WAYNESVILLE(5)CARTHAGE(3)SMITHVILLE(3)PLATTE CITY(3)DES PERES(31)LAMAR(2)ODESSA(3)PLEASANT HILL(3)CARL JUNCTION(2)DEXTER(4)UNION(11)EXCELSIOR SPRINGS(3)PERRYVILLE(7)HILLSBORO(6)WARRENTON(7)NEOSHO(5)BOLIVAR(6)KENNETT(2)LAKE OZARK(5)HIGGINSVILLE(2)POLO(3)