Missouri Tap Water Quality Report
685 cities analyzed • 4,631,280 people served
Updated September 2026 • Data from EWG & EPA SDWIS
685
Cities Analyzed
6.4
Avg Above Guidelines
4,631,280
Total Population Served
Best Water Quality
Willard (0 above guidelines)
Most Concerns
O Fallon (16 above guidelines)
Most Common Contaminants in Missouri
| Contaminant | Found In | % of Cities |
|---|---|---|
| Total trihalomethanes (TTHMs) carcinogen | 507 of 685 | 74% |
| Chloroform carcinogen | 481 of 685 | 70% |
| Bromodichloromethane carcinogen | 477 of 685 | 70% |
| Barium | 475 of 685 | 69% |
| Dibromochloromethane carcinogen | 458 of 685 | 67% |
| Haloacetic acids (HAA5) carcinogen | 392 of 685 | 57% |
| Manganese | 388 of 685 | 57% |
| Nitrate and nitrite carcinogen | 370 of 685 | 54% |
| Dichloroacetic acid carcinogen | 343 of 685 | 50% |
| Fluoride | 330 of 685 | 48% |
City-by-City Water Quality Rankings
Ranked by number of contaminants above EWG health guidelines (most to fewest).
| # | City | Detected | Above Guidelines | Above Legal | People Served |
|---|---|---|---|---|---|
| 1 | O Fallon | 36 | 16 | 0 | 100,587 |
| 2 | St Louis | 30 | 15 | 0 | 304,709 |
| 3 | Barnhart | 31 | 15 | 0 | 36,000 |
| 4 | Arnold | 31 | 15 | 0 | 20,000 |
| 5 | Chesterfield | 31 | 14 | 0 | 1,100,000 |
| 6 | St Peters | 35 | 14 | 0 | 52,575 |
| 7 | Jefferson City | 26 | 14 | 0 | 30,075 |
| 8 | Kirkwood | 31 | 14 | 0 | 28,000 |
| 9 | Webb City | 26 | 14 | 0 | 12,488 |
| 10 | Arnonld | 31 | 14 | 0 | 10,000 |
| 11 | Joplin | 22 | 13 | 0 | 73,728 |
| 12 | St Charles | 31 | 13 | 0 | 73,040 |
| 13 | Neosho | 22 | 13 | 0 | 12,157 |
| 14 | Festus | 20 | 13 | 0 | 12,054 |
| 15 | Mexico | 18 | 13 | 0 | 12,000 |
| 16 | Maryville | 20 | 13 | 0 | 10,775 |
| 17 | Smithville | 22 | 13 | 0 | 10,290 |
| 18 | Elsberry | 25 | 13 | 1 | 2,051 |
| 19 | Garden City | 21 | 13 | 0 | 1,590 |
| 20 | Bridgeton | 31 | 13 | 0 | 240 |
| 21 | Springfield | 22 | 12 | 0 | 172,025 |
| 22 | Wentzville | 24 | 12 | 0 | 41,784 |
| 23 | Ft Leonard Wood | 22 | 12 | 0 | 34,000 |
| 24 | Kirksville | 22 | 12 | 0 | 17,304 |
| 25 | Hannibal | 23 | 12 | 0 | 17,108 |
| 26 | Poplar Bluff | 19 | 12 | 0 | 17,043 |
| 27 | High Ridge | 21 | 12 | 0 | 16,548 |
| 28 | Sikeston | 26 | 12 | 0 | 16,291 |
| 29 | Marshall | 20 | 12 | 0 | 13,065 |
| 30 | West Plains | 18 | 12 | 0 | 12,000 |
| 31 | Kearney | 26 | 12 | 0 | 11,500 |
| 32 | Higginsville | 19 | 12 | 0 | 7,180 |
| 33 | Savannah | 20 | 12 | 0 | 5,868 |
| 34 | Milan | 17 | 12 | 0 | 4,327 |
| 35 | Cosby | 19 | 12 | 0 | 3,580 |
| 36 | Boonville | 19 | 12 | 0 | 2,451 |
| 37 | Stanberry | 17 | 12 | 0 | 2,290 |
| 38 | Rushville | 19 | 12 | 0 | 2,050 |
| 39 | Sweet Springs | 19 | 12 | 0 | 1,412 |
| 40 | Waverly | 20 | 12 | 0 | 800 |
| 41 | Fenton | 21 | 12 | 0 | 500 |
| 42 | Malta Bend | 20 | 12 | 0 | 200 |
| 43 | Gentry | 17 | 12 | 0 | 25 |
| 44 | Mound City | 16 | 12 | 0 | 0 |
| 45 | Alma | 20 | 12 | 0 | 0 |
| 46 | Canton | 19 | 12 | 2 | 0 |
| 47 | Annapolis | 18 | 12 | 1 | 0 |
| 48 | Green City | 17 | 12 | 0 | 0 |
| 49 | Kansas City | 22 | 11 | 0 | 513,800 |
| 50 | Columbia | 19 | 11 | 0 | 126,254 |
| 51 | Independence | 18 | 11 | 0 | 117,084 |
| 52 | St Joseph | 18 | 11 | 0 | 77,000 |
| 53 | Cape Girardeau | 24 | 11 | 0 | 39,941 |
| 54 | Liberty | 23 | 11 | 0 | 31,167 |
| 55 | Gladstone | 20 | 11 | 0 | 27,365 |
| 56 | Grandview | 18 | 11 | 0 | 24,500 |
| 57 | Belton | 22 | 11 | 0 | 23,598 |
| 58 | Raytown | 23 | 11 | 0 | 17,066 |
| 59 | Kennett | 21 | 11 | 0 | 10,500 |
| 60 | Cameron | 15 | 11 | 0 | 9,933 |
| 61 | Odessa | 18 | 11 | 0 | 8,250 |
| 62 | Waldron | 22 | 11 | 0 | 6,900 |
| 63 | Peculiar | 23 | 11 | 0 | 5,000 |
| 64 | Herculaneum | 19 | 11 | 0 | 4,227 |
| 65 | Sibley | 18 | 11 | 0 | 3,915 |
| 66 | Queen City | 24 | 11 | 0 | 3,482 |
| 67 | Vandalia | 17 | 11 | 0 | 3,140 |
| 68 | Buckner | 18 | 11 | 0 | 3,076 |
| 69 | Portageville | 17 | 11 | 0 | 3,074 |
| 70 | Carrollton | 15 | 11 | 0 | 3,063 |
| 71 | Sugar Creek | 18 | 11 | 0 | 2,500 |
| 72 | Monroe City | 17 | 11 | 0 | 2,443 |
| 73 | Montrose | 16 | 11 | 0 | 2,387 |
| 74 | Weatherby Lake | 22 | 11 | 0 | 2,077 |
| 75 | Huntsville | 17 | 11 | 0 | 1,563 |
| 76 | Wheeling | 15 | 11 | 0 | 1,350 |
| 77 | Archie | 16 | 11 | 0 | 1,300 |
| 78 | Paris | 17 | 11 | 0 | 1,250 |
| 79 | Wellsville | 16 | 11 | 0 | 1,210 |
| 80 | Maysville | 16 | 11 | 0 | 1,093 |
| 81 | Edina | 16 | 11 | 0 | 1,014 |
| 82 | Unity Village | 23 | 11 | 0 | 1,000 |
| 83 | New London | 17 | 11 | 0 | 975 |
| 84 | Ferrelview | 22 | 11 | 0 | 850 |
| 85 | Clarence | 18 | 11 | 0 | 813 |
| 86 | Lancaster | 23 | 11 | 0 | 728 |
| 87 | La Belle | 17 | 11 | 0 | 660 |
| 88 | Lewistown | 17 | 11 | 0 | 580 |
| 89 | Madison | 17 | 11 | 0 | 554 |
| 90 | Dearborn | 22 | 11 | 0 | 529 |
| 91 | Rockville | 17 | 11 | 0 | 500 |
| 92 | Farber | 16 | 11 | 0 | 450 |
| 93 | Osborn | 16 | 11 | 0 | 405 |
| 94 | St Marys | 15 | 11 | 0 | 360 |
| 95 | Northmoor | 22 | 11 | 0 | 328 |
| 96 | Callao | 18 | 11 | 0 | 311 |
| 97 | Linneus | 15 | 11 | 0 | 278 |
| 98 | Curryville | 16 | 11 | 0 | 255 |
| 99 | Mayview | 16 | 11 | 0 | 211 |
| 100 | Emma | 15 | 11 | 0 | 205 |
| 101 | Birmingham | 22 | 11 | 0 | 200 |
| 102 | Graham | 13 | 11 | 0 | 170 |
| 103 | Westboro | 13 | 11 | 0 | 141 |
| 104 | Stoutsville | 16 | 11 | 0 | 25 |
| 105 | Concordia | 15 | 11 | 0 | 0 |
| 106 | Camden Point | 22 | 11 | 0 | 0 |
| 107 | Oak Grove | 18 | 11 | 0 | 0 |
| 108 | Bogard | 15 | 11 | 0 | 0 |
| 109 | Hamilton | 18 | 11 | 0 | 0 |
| 110 | Laredo | 15 | 11 | 0 | 0 |
| 111 | Appleton City | 16 | 11 | 0 | 0 |
| 112 | Ewing | 18 | 11 | 0 | 0 |
| 113 | Rolla | 18 | 10 | 0 | 20,800 |
| 114 | Moberly | 19 | 10 | 0 | 13,783 |
| 115 | Troy | 17 | 10 | 0 | 12,500 |
| 116 | Macon | 18 | 10 | 0 | 11,606 |
| 117 | Branson | 20 | 10 | 0 | 11,416 |
| 118 | Clinton | 17 | 10 | 0 | 11,373 |
| 119 | Excelsior Springs | 19 | 10 | 0 | 11,084 |
| 120 | St Joseph | 17 | 10 | 0 | 10,600 |
| 121 | Harrisonville | 15 | 10 | 0 | 10,019 |
| 122 | Monett | 17 | 10 | 0 | 9,027 |
| 123 | Lake Lotawana | 15 | 10 | 0 | 9,002 |
| 124 | Desloge | 12 | 10 | 0 | 5,034 |
| 125 | Lexington | 13 | 10 | 0 | 4,729 |
| 126 | Lathrop | 16 | 10 | 0 | 4,518 |
| 127 | No Kansas City | 18 | 10 | 0 | 4,500 |
| 128 | Bethany | 14 | 10 | 0 | 3,740 |
| 129 | Wright City | 16 | 10 | 0 | 3,550 |
| 130 | Pleasant Hill | 13 | 10 | 0 | 2,875 |
| 131 | Lawson | 19 | 10 | 0 | 2,500 |
| 132 | Chillicothe | 13 | 10 | 0 | 2,215 |
| 133 | Slater | 15 | 10 | 0 | 1,856 |
| 134 | Weston | 13 | 10 | 0 | 1,850 |
| 135 | Parkville | 17 | 10 | 0 | 1,850 |
| 136 | Memphis | 15 | 10 | 0 | 1,822 |
| 137 | Point Lookout | 13 | 10 | 0 | 1,700 |
| 138 | Purdin | 15 | 10 | 0 | 1,620 |
| 139 | Princeton | 13 | 10 | 0 | 1,166 |
| 140 | La Grange | 18 | 10 | 2 | 1,102 |
| 141 | Lake Waukomis | 17 | 10 | 0 | 1,097 |
| 142 | Lilbourn | 14 | 10 | 0 | 1,018 |
| 143 | Drexel | 13 | 10 | 0 | 965 |
| 144 | Jamesport | 14 | 10 | 0 | 826 |
| 145 | Bevier | 18 | 10 | 0 | 762 |
| 146 | Truesdale | 17 | 10 | 0 | 732 |
| 147 | Edgerton | 16 | 10 | 0 | 503 |
| 148 | Ridgeway | 14 | 10 | 0 | 464 |
| 149 | Gilman City | 14 | 10 | 0 | 387 |
| 150 | Altanta | 16 | 10 | 0 | 385 |
| 151 | Henrietta | 13 | 10 | 0 | 356 |
| 152 | Cainsville | 14 | 10 | 0 | 290 |
| 153 | Wyaconda | 11 | 10 | 0 | 227 |
| 154 | Coffey | 14 | 10 | 0 | 166 |
| 155 | York | 17 | 10 | 0 | 135 |
| 156 | Gilliam | 16 | 10 | 0 | 125 |
| 157 | Elmer | 18 | 10 | 0 | 52 |
| 158 | Conception Jct | 14 | 10 | 0 | 0 |
| 159 | Albany | 12 | 10 | 0 | 0 |
| 160 | Maitland | 12 | 10 | 0 | 0 |
| 161 | Crystal City | 17 | 10 | 0 | 0 |
| 162 | Plattsburg | 16 | 10 | 0 | 0 |
| 163 | Trimble | 16 | 10 | 0 | 0 |
| 164 | Bosworth | 14 | 10 | 1 | 0 |
| 165 | Chula | 13 | 10 | 0 | 0 |
| 166 | Arcadia | 14 | 10 | 0 | 0 |
| 167 | Hume | 17 | 10 | 0 | 0 |
| 168 | Eagleville | 14 | 10 | 0 | 0 |
| 169 | Sedalia | 22 | 9 | 0 | 22,000 |
| 170 | Raymore | 14 | 9 | 0 | 19,767 |
| 171 | Grain Valley | 15 | 9 | 0 | 16,000 |
| 172 | Eureka | 14 | 9 | 0 | 11,000 |
| 173 | Richmond | 15 | 9 | 0 | 9,360 |
| 174 | Park Hills | 13 | 9 | 0 | 8,587 |
| 175 | Perryville | 17 | 9 | 0 | 8,555 |
| 176 | Dexter | 16 | 9 | 0 | 7,927 |
| 177 | Scott City | 13 | 9 | 0 | 4,565 |
| 178 | Ste Genevieve | 11 | 9 | 0 | 4,485 |
| 179 | Freeman | 16 | 9 | 0 | 4,143 |
| 180 | Palmyra | 14 | 9 | 0 | 3,595 |
| 181 | Louisiana | 15 | 9 | 0 | 3,364 |
| 182 | Mercer | 10 | 9 | 0 | 3,200 |
| 183 | Morley | 10 | 9 | 0 | 3,150 |
| 184 | Marceline | 13 | 9 | 0 | 2,650 |
| 185 | Piedmont | 12 | 9 | 0 | 2,620 |
| 186 | Gallatin | 9 | 9 | 0 | 2,448 |
| 187 | Warsaw | 13 | 9 | 0 | 2,236 |
| 188 | Pattonsburg | 12 | 9 | 0 | 2,103 |
| 189 | Craig | 13 | 9 | 0 | 2,000 |
| 190 | Bernie | 12 | 9 | 0 | 1,859 |
| 191 | Shelbina | 14 | 9 | 0 | 1,771 |
| 192 | Salisbury | 13 | 9 | 0 | 1,620 |
| 193 | Rockport | 12 | 9 | 0 | 1,318 |
| 194 | New Franklin | 12 | 9 | 0 | 1,089 |
| 195 | Oregon | 10 | 9 | 0 | 1,085 |
| 196 | Brunswick | 9 | 9 | 0 | 1,078 |
| 197 | Marble Hill | 11 | 9 | 0 | 862 |
| 198 | Orrick | 15 | 9 | 0 | 850 |
| 199 | Van Buren | 14 | 9 | 0 | 819 |
| 200 | Russellville | 12 | 9 | 0 | 800 |
| 201 | Excelsior Spgs | 15 | 9 | 0 | 750 |
| 202 | Norborne | 14 | 9 | 0 | 708 |
| 203 | Southwest City | 14 | 9 | 0 | 600 |
| 204 | Polo | 9 | 9 | 0 | 575 |
| 205 | Parma | 13 | 9 | 0 | 550 |
| 206 | Wayland | 11 | 9 | 0 | 533 |
| 207 | Fisk | 13 | 9 | 0 | 498 |
| 208 | Keytesville | 13 | 9 | 0 | 476 |
| 209 | Meadville | 14 | 9 | 0 | 476 |
| 210 | Essex | 11 | 9 | 0 | 423 |
| 211 | Lesterville | 12 | 9 | 0 | 400 |
| 212 | East Lynne | 12 | 9 | 0 | 350 |
| 213 | Prtg De Sioux | 12 | 9 | 0 | 345 |
| 214 | Laclede | 18 | 9 | 0 | 345 |
| 215 | Frankford | 13 | 9 | 0 | 323 |
| 216 | Amazonia | 12 | 9 | 0 | 312 |
| 217 | Kingston | 13 | 9 | 0 | 290 |
| 218 | Brashear | 11 | 9 | 0 | 288 |
| 219 | New Hampton | 9 | 9 | 0 | 283 |
| 220 | De Kalb | 9 | 9 | 0 | 250 |
| 221 | Altamont | 9 | 9 | 0 | 207 |
| 222 | Blackwater | 9 | 9 | 0 | 181 |
| 223 | Elmo | 11 | 9 | 0 | 169 |
| 224 | Nelson | 9 | 9 | 0 | 158 |
| 225 | Miami | 9 | 9 | 0 | 140 |
| 226 | Rosendale | 10 | 9 | 0 | 130 |
| 227 | Tina | 9 | 9 | 0 | 130 |
| 228 | Jameson | 9 | 9 | 0 | 121 |
| 229 | Rock Port | 12 | 9 | 0 | 25 |
| 230 | Glasgow | 13 | 9 | 0 | 0 |
| 231 | Holt | 14 | 9 | 0 | 0 |
| 232 | Hardin | 15 | 9 | 0 | 0 |
| 233 | Lake Sherwood | 16 | 9 | 0 | 0 |
| 234 | Fairfax | 12 | 9 | 0 | 0 |
| 235 | Fillmore | 9 | 9 | 0 | 0 |
| 236 | Tarkio | 12 | 9 | 0 | 0 |
| 237 | Braymer | 15 | 9 | 0 | 0 |
| 238 | Breckenridge | 9 | 9 | 0 | 0 |
| 239 | Arrow Rock | 9 | 9 | 0 | 0 |
| 240 | Dawn | 15 | 9 | 0 | 0 |
| 241 | Eminence | 12 | 9 | 0 | 0 |
| 242 | Hale | 9 | 9 | 0 | 0 |
| 243 | Kidder | 9 | 9 | 0 | 0 |
| 244 | Amoret | 14 | 9 | 0 | 0 |
| 245 | Amsterdam | 14 | 9 | 0 | 0 |
| 246 | Ashland | 12 | 9 | 0 | 0 |
| 247 | Cleveland | 15 | 9 | 0 | 0 |
| 248 | Creighton | 9 | 9 | 0 | 0 |
| 249 | Fayette | 12 | 9 | 0 | 0 |
| 250 | Bolckow | 13 | 9 | 0 | 0 |
| 251 | Birch Tree | 13 | 9 | 0 | 0 |
| 252 | Lees Summit | 13 | 8 | 0 | 99,400 |
| 253 | Blue Springs | 14 | 8 | 0 | 54,395 |
| 254 | Warrensburg | 16 | 8 | 0 | 20,473 |
| 255 | Jackson | 16 | 8 | 0 | 15,481 |
| 256 | Lebanon | 18 | 8 | 0 | 14,932 |
| 257 | Winfield | 17 | 8 | 0 | 14,000 |
| 258 | Holden | 15 | 8 | 0 | 11,652 |
| 259 | Platte City | 13 | 8 | 0 | 9,552 |
| 260 | Warrenton | 14 | 8 | 0 | 8,208 |
| 261 | House Springs | 17 | 8 | 0 | 7,500 |
| 262 | Clarksdale | 10 | 8 | 0 | 7,283 |
| 263 | Kahoka | 10 | 8 | 0 | 7,140 |
| 264 | Perry | 10 | 8 | 0 | 6,482 |
| 265 | Brookfield | 10 | 8 | 0 | 5,913 |
| 266 | Philadelphia | 10 | 8 | 0 | 4,900 |
| 267 | Lamar | 15 | 8 | 0 | 4,500 |
| 268 | Trenton | 15 | 8 | 0 | 3,900 |
| 269 | Bonne Terre | 13 | 8 | 0 | 3,537 |
| 270 | New Madrid | 11 | 8 | 0 | 3,113 |
| 271 | Anniston | 8 | 8 | 0 | 3,000 |
| 272 | Unionville | 9 | 8 | 0 | 2,997 |
| 273 | Shelbyville | 9 | 8 | 0 | 2,855 |
| 274 | Montgomery City | 13 | 8 | 0 | 2,811 |
| 275 | Rich Hill | 10 | 8 | 0 | 2,160 |
| 276 | Rockaway Beach | 12 | 8 | 0 | 1,839 |
| 277 | Deepwater | 11 | 8 | 0 | 1,800 |
| 278 | Butler | 8 | 8 | 0 | 1,613 |
| 279 | Gower | 10 | 8 | 0 | 1,525 |
| 280 | Grant City | 9 | 8 | 0 | 1,460 |
| 281 | Advance | 12 | 8 | 1 | 1,400 |
| 282 | La Plata | 13 | 8 | 0 | 1,366 |
| 283 | Cottleville | 11 | 8 | 0 | 1,200 |
| 284 | Urich | 9 | 8 | 0 | 1,140 |
| 285 | King City | 12 | 8 | 0 | 1,100 |
| 286 | Humansville | 13 | 8 | 0 | 1,048 |
| 287 | Village Of Loch Lloyd | 13 | 8 | 0 | 938 |
| 288 | Lockwood | 11 | 8 | 0 | 936 |
| 289 | Morehouse | 10 | 8 | 0 | 900 |
| 290 | Sunrise Beach | 13 | 8 | 0 | 812 |
| 291 | Pilot Knob | 12 | 8 | 0 | 746 |
| 292 | Miller | 9 | 8 | 0 | 699 |
| 293 | New Bloomfield | 13 | 8 | 0 | 669 |
| 294 | Burlington Jct | 12 | 8 | 0 | 630 |
| 295 | Naylor | 11 | 8 | 0 | 611 |
| 296 | Vienna | 11 | 8 | 0 | 591 |
| 297 | Higbee | 10 | 8 | 0 | 560 |
| 298 | Novinger | 10 | 8 | 0 | 550 |
| 299 | Hopkins | 14 | 8 | 0 | 550 |
| 300 | Marston | 13 | 8 | 0 | 500 |
| 301 | Bucklin | 10 | 8 | 0 | 467 |
| 302 | Ravenwood | 12 | 8 | 0 | 440 |
| 303 | Union Star | 9 | 8 | 0 | 437 |
| 304 | Bull Creek | 10 | 8 | 0 | 400 |
| 305 | Wyatt | 11 | 8 | 0 | 362 |
| 306 | Mindenmines | 12 | 8 | 0 | 340 |
| 307 | Neelyville | 10 | 8 | 0 | 310 |
| 308 | Diggins | 10 | 8 | 0 | 300 |
| 309 | Browning | 8 | 8 | 0 | 265 |
| 310 | Easton | 10 | 8 | 0 | 250 |
| 311 | Skidmore | 10 | 8 | 0 | 245 |
| 312 | Theodosia | 10 | 8 | 1 | 243 |
| 313 | Sheridan | 12 | 8 | 0 | 235 |
| 314 | Blodgett | 11 | 8 | 0 | 215 |
| 315 | Mendon | 10 | 8 | 0 | 207 |
| 316 | Sedgewickville | 11 | 8 | 0 | 197 |
| 317 | Parnell | 8 | 8 | 0 | 195 |
| 318 | Glenwood | 9 | 8 | 0 | 195 |
| 319 | Hunnewell | 9 | 8 | 0 | 184 |
| 320 | Newtown | 8 | 8 | 0 | 183 |
| 321 | Mosby | 9 | 8 | 0 | 119 |
| 322 | Galt | 9 | 8 | 0 | 98 |
| 323 | Kirbyville | 10 | 8 | 0 | 90 |
| 324 | Clearmont | 10 | 8 | 0 | 0 |
| 325 | Kingsville | 15 | 8 | 0 | 0 |
| 326 | Calhoun | 9 | 8 | 0 | 0 |
| 327 | Osceola | 11 | 8 | 0 | 0 |
| 328 | Cross Timbers | 11 | 8 | 0 | 0 |
| 329 | Clarkton | 13 | 8 | 0 | 0 |
| 330 | Cowgill | 13 | 8 | 0 | 0 |
| 331 | Knox City | 9 | 8 | 0 | 0 |
| 332 | Bertrand | 10 | 8 | 0 | 0 |
| 333 | Augusta | 10 | 8 | 0 | 0 |
| 334 | Downing | 10 | 8 | 0 | 0 |
| 335 | Jamestown | 12 | 8 | 0 | 0 |
| 336 | Spickard | 9 | 8 | 0 | 0 |
| 337 | Blairstown | 8 | 8 | 0 | 0 |
| 338 | Chilhowee | 15 | 8 | 0 | 0 |
| 339 | Deerfield | 11 | 8 | 0 | 0 |
| 340 | Franklin | 11 | 8 | 0 | 0 |
| 341 | Barnard | 10 | 8 | 0 | 0 |
| 342 | Green Castle | 8 | 8 | 0 | 0 |
| 343 | Farmington | 18 | 7 | 0 | 18,217 |
| 344 | Nevada | 12 | 7 | 0 | 8,925 |
| 345 | Hayti | 11 | 7 | 0 | 6,042 |
| 346 | Mount Vernon | 9 | 7 | 0 | 4,575 |
| 347 | Malden | 13 | 7 | 0 | 3,706 |
| 348 | Broseley | 10 | 7 | 0 | 2,600 |
| 349 | Gideon | 14 | 7 | 0 | 2,200 |
| 350 | Carterville | 11 | 7 | 0 | 1,982 |
| 351 | Adrian | 12 | 7 | 0 | 1,635 |
| 352 | Lampe | 15 | 7 | 0 | 1,478 |
| 353 | Marthasville | 14 | 7 | 0 | 1,200 |
| 354 | Miner | 12 | 7 | 0 | 921 |
| 355 | Pomona | 9 | 7 | 0 | 850 |
| 356 | Liberal | 11 | 7 | 0 | 759 |
| 357 | Matthews | 10 | 7 | 0 | 628 |
| 358 | Wardell | 12 | 7 | 0 | 427 |
| 359 | Schell City | 12 | 7 | 0 | 250 |
| 360 | Vanduser | 12 | 7 | 0 | 168 |
| 361 | Houstonia | 12 | 7 | 0 | 0 |
| 362 | Centerview | 12 | 7 | 0 | 0 |
| 363 | East Prairie | 11 | 7 | 0 | 0 |
| 364 | Charleston | 14 | 7 | 0 | 0 |
| 365 | Canalou | 11 | 7 | 0 | 0 |
| 366 | Chaffee | 11 | 7 | 0 | 0 |
| 367 | Bowling Green | 15 | 7 | 0 | 0 |
| 368 | Mountain View | 8 | 7 | 0 | 0 |
| 369 | Bolivar | 12 | 6 | 0 | 11,000 |
| 370 | Whiteman AFB | 12 | 6 | 0 | 10,707 |
| 371 | Marshfield | 10 | 6 | 0 | 7,425 |
| 372 | Greenwood | 8 | 6 | 0 | 5,705 |
| 373 | Rogersville | 11 | 6 | 0 | 3,213 |
| 374 | Oronogo | 10 | 6 | 0 | 2,500 |
| 375 | Oak Ridge | 12 | 6 | 0 | 2,500 |
| 376 | Sparta | 9 | 6 | 0 | 1,946 |
| 377 | Sheldon | 11 | 6 | 0 | 1,800 |
| 378 | Linn | 10 | 6 | 0 | 1,500 |
| 379 | Leadwood | 11 | 6 | 0 | 1,247 |
| 380 | St Paul | 10 | 6 | 0 | 1,218 |
| 381 | Purdy | 9 | 6 | 0 | 1,100 |
| 382 | Exeter | 9 | 6 | 0 | 772 |
| 383 | Iberia | 8 | 6 | 0 | 747 |
| 384 | Strasburg | 8 | 6 | 0 | 638 |
| 385 | Hermitage | 11 | 6 | 0 | 621 |
| 386 | Pleasant Hope | 11 | 6 | 0 | 614 |
| 387 | Foristell | 10 | 6 | 0 | 550 |
| 388 | Laddonia | 10 | 6 | 0 | 511 |
| 389 | Gravois Mills | 10 | 6 | 0 | 400 |
| 390 | Tracy | 6 | 6 | 0 | 330 |
| 391 | Clark | 10 | 6 | 0 | 300 |
| 392 | Walker | 10 | 6 | 0 | 283 |
| 393 | Dudley | 9 | 6 | 0 | 222 |
| 394 | Koshkonong | 10 | 6 | 0 | 212 |
| 395 | Meta | 7 | 6 | 0 | 210 |
| 396 | Ironton | 9 | 6 | 0 | 207 |
| 397 | Belgrade | 9 | 6 | 0 | 175 |
| 398 | Morrison | 11 | 6 | 0 | 140 |
| 399 | Leopold | 10 | 6 | 0 | 130 |
| 400 | Kingdom City | 9 | 6 | 0 | 128 |
| 401 | Overland Park | 10 | 6 | 0 | 100 |
| 402 | Buffalo | 9 | 6 | 0 | 48 |
| 403 | High Hill | 12 | 6 | 0 | 30 |
| 404 | Cassville | 9 | 6 | 0 | 0 |
| 405 | Hayti Heights | 9 | 6 | 0 | 0 |
| 406 | Diamond | 9 | 6 | 0 | 0 |
| 407 | Ozark | 15 | 5 | 0 | 22,000 |
| 408 | Republic | 14 | 5 | 0 | 16,100 |
| 409 | Carthage | 15 | 5 | 0 | 14,600 |
| 410 | Fulton | 13 | 5 | 0 | 13,080 |
| 411 | Holts Summit | 11 | 5 | 0 | 9,840 |
| 412 | Battlefield | 19 | 5 | 0 | 9,168 |
| 413 | Aurora | 15 | 5 | 0 | 8,529 |
| 414 | Carl Junction | 9 | 5 | 0 | 8,142 |
| 415 | De Soto | 10 | 5 | 0 | 8,000 |
| 416 | Mapaville | 12 | 5 | 0 | 6,100 |
| 417 | Mountain Grove | 9 | 5 | 0 | 4,789 |
| 418 | Tipton | 8 | 5 | 0 | 3,262 |
| 419 | Owensville | 8 | 5 | 0 | 2,800 |
| 420 | Versailles | 9 | 5 | 0 | 2,482 |
| 421 | Jane | 11 | 5 | 0 | 2,481 |
| 422 | Thayer | 6 | 5 | 0 | 2,243 |
| 423 | Cabool | 9 | 5 | 0 | 2,146 |
| 424 | Mansfield | 10 | 5 | 0 | 1,193 |
| 425 | Jasper | 9 | 5 | 0 | 932 |
| 426 | Sturgeon | 10 | 5 | 0 | 872 |
| 427 | Wellington | 6 | 5 | 0 | 812 |
| 428 | Pineville | 7 | 5 | 0 | 791 |
| 429 | Wheaton | 8 | 5 | 0 | 698 |
| 430 | Kelso | 8 | 5 | 0 | 586 |
| 431 | Summersville | 12 | 5 | 0 | 502 |
| 432 | Delta | 9 | 5 | 0 | 480 |
| 433 | Fair Play | 7 | 5 | 0 | 475 |
| 434 | Galena | 10 | 5 | 0 | 450 |
| 435 | Otterville | 8 | 5 | 0 | 450 |
| 436 | Bell City | 9 | 5 | 0 | 416 |
| 437 | Frohna | 9 | 5 | 0 | 350 |
| 438 | Risco | 9 | 5 | 0 | 278 |
| 439 | Manhattan | 11 | 5 | 0 | 250 |
| 440 | Mineral Point | 9 | 5 | 0 | 231 |
| 441 | Stotts City | 8 | 5 | 0 | 225 |
| 442 | Bates City | 6 | 5 | 0 | 225 |
| 443 | Picher | 6 | 5 | 0 | 115 |
| 444 | South Greenfield | 8 | 5 | 0 | 100 |
| 445 | Levasy | 5 | 5 | 0 | 82 |
| 446 | Green Ridge | 8 | 5 | 0 | 0 |
| 447 | Clarksville | 9 | 5 | 0 | 0 |
| 448 | Bronaugh | 10 | 5 | 0 | 0 |
| 449 | Collins | 8 | 5 | 0 | 0 |
| 450 | Altenburg | 9 | 5 | 0 | 0 |
| 451 | Noel | 8 | 5 | 0 | 0 |
| 452 | Leeton | 7 | 5 | 0 | 0 |
| 453 | Windsor | 8 | 4 | 0 | 2,900 |
| 454 | Knob Noster | 9 | 4 | 0 | 2,863 |
| 455 | Potosi | 11 | 4 | 0 | 2,650 |
| 456 | Osage Beach | 8 | 4 | 0 | 2,611 |
| 457 | Steele | 7 | 4 | 0 | 1,940 |
| 458 | Bloomfield | 8 | 4 | 0 | 1,933 |
| 459 | Fredericktown | 8 | 4 | 0 | 1,705 |
| 460 | Highlandville | 7 | 4 | 0 | 1,417 |
| 461 | Oran | 9 | 4 | 0 | 1,294 |
| 462 | Reeds Spring | 7 | 4 | 0 | 1,287 |
| 463 | Laurie | 9 | 4 | 0 | 990 |
| 464 | Auxvasse | 8 | 4 | 0 | 983 |
| 465 | Puxico | 7 | 4 | 0 | 881 |
| 466 | Golden City | 7 | 4 | 0 | 764 |
| 467 | Irondale | 8 | 4 | 0 | 594 |
| 468 | Blue Eye | 8 | 4 | 0 | 525 |
| 469 | Purcell | 4 | 4 | 0 | 432 |
| 470 | Newburg | 7 | 4 | 0 | 424 |
| 471 | Niangua | 6 | 4 | 0 | 411 |
| 472 | Wheatland | 7 | 4 | 0 | 371 |
| 473 | Williamsville | 5 | 4 | 0 | 342 |
| 474 | St Thomas | 8 | 4 | 0 | 260 |
| 475 | Missouri City | 4 | 4 | 0 | 254 |
| 476 | Holland | 7 | 4 | 0 | 230 |
| 477 | Centerville | 6 | 4 | 0 | 200 |
| 478 | Kaiser | 8 | 4 | 0 | 172 |
| 479 | Belleview | 6 | 4 | 0 | 140 |
| 480 | Foley | 6 | 4 | 0 | 70 |
| 481 | Ionia | 7 | 4 | 0 | 0 |
| 482 | Prairie Home | 11 | 4 | 0 | 0 |
| 483 | Centertown | 9 | 4 | 0 | 0 |
| 484 | Pilot Grove | 7 | 4 | 0 | 0 |
| 485 | Marquand | 11 | 4 | 0 | 0 |
| 486 | Ellington | 7 | 4 | 0 | 0 |
| 487 | Ava | 7 | 4 | 0 | 0 |
| 488 | Bland | 6 | 4 | 0 | 0 |
| 489 | Washington | 10 | 3 | 0 | 14,068 |
| 490 | Union | 6 | 3 | 0 | 12,348 |
| 491 | Caruthersville | 9 | 3 | 0 | 5,562 |
| 492 | Pevely | 9 | 3 | 0 | 5,400 |
| 493 | St Robert | 8 | 3 | 0 | 5,192 |
| 494 | St Clair | 8 | 3 | 0 | 4,700 |
| 495 | Camdenton | 5 | 3 | 0 | 3,960 |
| 496 | Doniphan | 6 | 3 | 0 | 2,650 |
| 497 | Hermann | 8 | 3 | 0 | 2,500 |
| 498 | Stockton | 9 | 3 | 0 | 1,892 |
| 499 | Sarcoxie | 6 | 3 | 0 | 1,539 |
| 500 | Bismarck | 6 | 3 | 0 | 1,470 |
| 501 | California | 6 | 3 | 0 | 1,425 |
| 502 | Villa Ridge | 8 | 3 | 0 | 1,300 |
| 503 | Wappapello | 6 | 3 | 0 | 1,200 |
| 504 | Gainesville | 6 | 3 | 0 | 742 |
| 505 | Norwood | 8 | 3 | 0 | 665 |
| 506 | Hornersville | 9 | 3 | 0 | 663 |
| 507 | Wooldridge | 7 | 3 | 0 | 562 |
| 508 | Cedar Hill | 7 | 3 | 0 | 490 |
| 509 | Stark City | 7 | 3 | 0 | 450 |
| 510 | Weaubleau | 7 | 3 | 0 | 418 |
| 511 | Lanagan | 7 | 3 | 0 | 417 |
| 512 | Chadwick | 5 | 3 | 0 | 325 |
| 513 | Mokane | 9 | 3 | 0 | 208 |
| 514 | Silex | 9 | 3 | 0 | 206 |
| 515 | Irvine | 4 | 3 | 0 | 113 |
| 516 | Cape Fair | 7 | 3 | 0 | 113 |
| 517 | Waynesville | 5 | 2 | 0 | 8,038 |
| 518 | Sullivan | 9 | 2 | 0 | 7,081 |
| 519 | Hallsville | 9 | 2 | 0 | 6,455 |
| 520 | Pacific | 8 | 2 | 0 | 6,000 |
| 521 | Salem | 8 | 2 | 0 | 4,935 |
| 522 | Eldon | 5 | 2 | 0 | 4,895 |
| 523 | Centralia | 6 | 2 | 0 | 4,625 |
| 524 | Cuba | 6 | 2 | 0 | 3,292 |
| 525 | Pittsburg | 5 | 2 | 0 | 3,084 |
| 526 | Hillsboro | 4 | 2 | 0 | 3,000 |
| 527 | Houston | 4 | 2 | 0 | 2,090 |
| 528 | Seymour | 3 | 2 | 0 | 1,943 |
| 529 | Steelville | 3 | 2 | 0 | 1,672 |
| 530 | Greenfield | 5 | 2 | 0 | 1,400 |
| 531 | Winona | 4 | 2 | 0 | 1,325 |
| 532 | Seligman | 5 | 2 | 0 | 890 |
| 533 | Edgar Springs | 4 | 2 | 0 | 800 |
| 534 | Conway | 4 | 2 | 0 | 788 |
| 535 | Golden | 6 | 2 | 0 | 484 |
| 536 | Leasburg | 3 | 2 | 0 | 353 |
| 537 | Raymondville | 3 | 2 | 0 | 341 |
| 538 | Bourbon | 5 | 2 | 0 | 214 |
| 539 | Ridgedale | 5 | 2 | 0 | 175 |
| 540 | Catawissa | 4 | 2 | 0 | 150 |
| 541 | Flemington | 5 | 2 | 0 | 124 |
| 542 | Myrtle | 4 | 2 | 0 | 120 |
| 543 | Weldon Spring | 6 | 2 | 0 | 100 |
| 544 | Dittmer | 4 | 2 | 0 | 100 |
| 545 | Benton | 3 | 2 | 0 | 72 |
| 546 | Silva | 5 | 2 | 0 | 45 |
| 547 | Eagle Rock | 5 | 2 | 0 | 40 |
| 548 | Richdale | 5 | 2 | 0 | 25 |
| 549 | Climax Springs | 5 | 2 | 0 | 0 |
| 550 | Edwards | 7 | 2 | 0 | 0 |
| 551 | Macks Creek | 5 | 2 | 0 | 0 |
| 552 | Grandin | 5 | 2 | 0 | 0 |
| 553 | Ellsinore | 5 | 2 | 0 | 0 |
| 554 | Cardwell | 6 | 2 | 0 | 0 |
| 555 | Barnett | 5 | 2 | 0 | 0 |
| 556 | Granby | 6 | 2 | 0 | 0 |
| 557 | Nixa | 8 | 1 | 0 | 24,532 |
| 558 | Lake Ozark | 8 | 1 | 0 | 5,613 |
| 559 | Powersite | 5 | 1 | 0 | 4,500 |
| 560 | El Dorado Spgs | 5 | 1 | 0 | 3,593 |
| 561 | Senath | 6 | 1 | 0 | 3,087 |
| 562 | Licking | 2 | 1 | 0 | 2,781 |
| 563 | Forsyth | 4 | 1 | 0 | 2,413 |
| 564 | Willow Springs | 6 | 1 | 0 | 2,254 |
| 565 | Richland | 3 | 1 | 0 | 1,863 |
| 566 | Washburn | 4 | 1 | 0 | 1,800 |
| 567 | Dixon | 5 | 1 | 0 | 1,500 |
| 568 | Duenweg | 5 | 1 | 0 | 1,469 |
| 569 | Pierce City | 5 | 1 | 0 | 1,200 |
| 570 | Stover | 6 | 1 | 0 | 1,200 |
| 571 | Moscow Mills | 5 | 1 | 0 | 897 |
| 572 | Viburnum | 6 | 1 | 0 | 800 |
| 573 | Des Peres | 5 | 1 | 0 | 800 |
| 574 | Jonesburg | 6 | 1 | 0 | 768 |
| 575 | Westphalia | 5 | 1 | 0 | 705 |
| 576 | Stoutland | 2 | 1 | 0 | 657 |
| 577 | Hartville | 3 | 1 | 0 | 655 |
| 578 | Shell Knob | 4 | 1 | 0 | 583 |
| 579 | Smithton | 5 | 1 | 0 | 563 |
| 580 | Bloomsdale | 3 | 1 | 0 | 562 |
| 581 | Alba | 5 | 1 | 0 | 555 |
| 582 | Greenville | 3 | 1 | 0 | 497 |
| 583 | Bois D Arc | 3 | 1 | 0 | 485 |
| 584 | Branson West | 4 | 1 | 0 | 484 |
| 585 | Grovespring | 3 | 1 | 0 | 483 |
| 586 | St Elizabeth | 4 | 1 | 0 | 435 |
| 587 | Urbana | 3 | 1 | 0 | 409 |
| 588 | Everton | 4 | 1 | 0 | 352 |
| 589 | Bellflower | 6 | 1 | 0 | 350 |
| 590 | Martinsburg | 5 | 1 | 0 | 304 |
| 591 | Bakersfield | 2 | 1 | 0 | 303 |
| 592 | Roach | 4 | 1 | 0 | 280 |
| 593 | Dadeville | 4 | 1 | 0 | 218 |
| 594 | Asbury | 5 | 1 | 0 | 207 |
| 595 | Rocky Mount | 5 | 1 | 0 | 200 |
| 596 | Mill Spring | 1 | 1 | 0 | 200 |
| 597 | Linn Creek | 2 | 1 | 0 | 190 |
| 598 | Middletown | 5 | 1 | 0 | 167 |
| 599 | St Ann | 4 | 1 | 0 | 154 |
| 600 | Halfway | 5 | 1 | 0 | 151 |
| 601 | Lonedell | 3 | 1 | 0 | 135 |
| 602 | Caledonia | 2 | 1 | 0 | 130 |
| 603 | Steedman | 5 | 1 | 0 | 113 |
| 604 | Robertsville | 2 | 1 | 0 | 110 |
| 605 | Fair Grove | 6 | 1 | 0 | 100 |
| 606 | Brighton | 2 | 1 | 0 | 87 |
| 607 | Gravois Mill | 3 | 1 | 0 | 75 |
| 608 | Tecumseh | 2 | 1 | 0 | 73 |
| 609 | Verona | 5 | 1 | 0 | 70 |
| 610 | Burfordville | 2 | 1 | 0 | 70 |
| 611 | Ofallon | 7 | 1 | 0 | 60 |
| 612 | Goodman | 4 | 1 | 0 | 51 |
| 613 | Arcola | 4 | 1 | 0 | 45 |
| 614 | Reeds Springs | 3 | 1 | 0 | 38 |
| 615 | La Monte | 6 | 1 | 0 | 30 |
| 616 | Hawk Point | 6 | 1 | 0 | 30 |
| 617 | Stanton | 2 | 1 | 0 | 28 |
| 618 | Belle | 3 | 1 | 0 | 25 |
| 619 | Imperial | 5 | 1 | 0 | 25 |
| 620 | Hughesville | 5 | 1 | 0 | 0 |
| 621 | Cole Camp | 4 | 1 | 0 | 0 |
| 622 | New Florence | 5 | 1 | 0 | 0 |
| 623 | Fremont | 2 | 1 | 0 | 0 |
| 624 | Bunker | 2 | 1 | 0 | 0 |
| 625 | Rocky Comfort | 4 | 1 | 0 | 0 |
| 626 | Clarksburg | 5 | 1 | 0 | 0 |
| 627 | Beaufort | 6 | 1 | 0 | 0 |
| 628 | Devils Elbo | 2 | 1 | 0 | 0 |
| 629 | Anderson | 4 | 1 | 0 | 0 |
| 630 | Fairview | 3 | 1 | 0 | 0 |
| 631 | Ash Grove | 2 | 1 | 0 | 0 |
| 632 | Willard | 3 | 0 | 0 | 8,312 |
| 633 | Campbell | 3 | 0 | 0 | 4,365 |
| 634 | Roby | 3 | 0 | 0 | 3,032 |
| 635 | Seneca | 4 | 0 | 0 | 2,390 |
| 636 | Clever | 3 | 0 | 0 | 2,139 |
| 637 | Kimberling City | 2 | 0 | 0 | 2,052 |
| 638 | New Haven | 3 | 0 | 0 | 2,000 |
| 639 | Taneyville | 5 | 0 | 0 | 2,000 |
| 640 | Qulin | 3 | 0 | 0 | 1,625 |
| 641 | Hollister | 2 | 0 | 0 | 1,275 |
| 642 | Loose Creek | 3 | 0 | 0 | 1,221 |
| 643 | Crocker | 2 | 0 | 0 | 1,093 |
| 644 | Alton | 2 | 0 | 0 | 1,000 |
| 645 | Fordland | 2 | 0 | 0 | 900 |
| 646 | Walnut Grove | 0 | 0 | 0 | 665 |
| 647 | Holcomb | 5 | 0 | 0 | 635 |
| 648 | Butterfield | 3 | 0 | 0 | 470 |
| 649 | Morrisville | 3 | 0 | 0 | 400 |
| 650 | Chamois | 3 | 0 | 0 | 396 |
| 651 | Kissee Mills | 3 | 0 | 0 | 370 |
| 652 | Walnut Shade | 2 | 0 | 0 | 343 |
| 653 | West Sullivan | 6 | 0 | 0 | 343 |
| 654 | Chestnut Ridge | 2 | 0 | 0 | 315 |
| 655 | Gasconade | 3 | 0 | 0 | 280 |
| 656 | St James | 3 | 0 | 0 | 200 |
| 657 | Hurley | 1 | 0 | 0 | 178 |
| 658 | Syracuse | 3 | 0 | 0 | 172 |
| 659 | Rhineland | 4 | 0 | 0 | 170 |
| 660 | Freistatt | 3 | 0 | 0 | 165 |
| 661 | Stella | 3 | 0 | 0 | 158 |
| 662 | Tuscumbia | 1 | 0 | 0 | 150 |
| 663 | Strafford | 2 | 0 | 0 | 125 |
| 664 | Louisburg | 3 | 0 | 0 | 122 |
| 665 | Leslie | 4 | 0 | 0 | 90 |
| 666 | Mt Vernon | 2 | 0 | 0 | 80 |
| 667 | Lowry City | 3 | 0 | 0 | 50 |
| 668 | Spokane | 3 | 0 | 0 | 50 |
| 669 | Desoto | 3 | 0 | 0 | 30 |
| 670 | Gerald | 3 | 0 | 0 | 30 |
| 671 | Labadie | 4 | 0 | 0 | 30 |
| 672 | Billings | 2 | 0 | 0 | 28 |
| 673 | Lincoln | 3 | 0 | 0 | 0 |
| 674 | Fortuna | 3 | 0 | 0 | 0 |
| 675 | Crane | 3 | 0 | 0 | 0 |
| 676 | Eugene | 2 | 0 | 0 | 0 |
| 677 | Arbyrd | 3 | 0 | 0 | 0 |
| 678 | Berger | 3 | 0 | 0 | 0 |
| 679 | Rosebud | 4 | 0 | 0 | 0 |
| 680 | Bonnots Mill | 3 | 0 | 0 | 0 |
| 681 | Laquey | 4 | 0 | 0 | 0 |
| 682 | Argyle | 4 | 0 | 0 | 0 |
| 683 | Bunceton | 3 | 0 | 0 | 0 |
| 684 | Preston | 1 | 0 | 0 | 0 |
| 685 | Freeburg | 5 | 0 | 0 | 0 |
Recommended Filtration for Missouri
Based on the most common contaminants found across Missouri (Total trihalomethanes (TTHMs), Chloroform, Bromodichloromethane), we recommend a reverse osmosis system or high-quality carbon block filter to remove disinfection byproducts and their precursors.
Echo RO System
Removes up to 99.9% of contaminants. The gold standard for drinking water in Missouri homes.
View RO SystemsEcho Whole-Home Filter
Protect every tap in your home from chlorine, VOCs, and disinfection byproducts.
View Whole-Home FiltersEcho Hydrogen Water Flask
Once your water is clean, supercharge it with molecular hydrogen for antioxidant and anti-inflammatory benefits.
Shop Hydrogen FlaskFrequently Asked Questions
Is Missouri tap water safe to drink?
Water quality varies significantly across Missouri. Of the 685 cities analyzed, the average city has 6.4 contaminants above EWG health guidelines. The best water quality was found in Willard. We recommend checking your specific city's report for detailed information.
What city has the best water in Missouri?
Based on our analysis, Willard has the fewest contaminants above EWG health guidelines in Missouri, with 0 above guideline levels.
What city has the worst water in Missouri?
Based on our analysis, O Fallon has the most contaminants above EWG health guidelines in Missouri, with 16 above guideline levels.
What's the best water filter for Missouri residents?
For most Missouri households, we recommend a reverse osmosis (RO) system for drinking water and a whole-home filter for showers and baths. The specific recommendation depends on your city's contaminant profile — check your city's report for personalized guidance.
National Water Quality Reports
Data sources: Environmental Working Group (EWG) Tap Water Database, U.S. EPA Safe Drinking Water Information System (SDWIS)
Last updated: September 2026
Methodology: Contaminant levels are compared against both EPA legal limits (Maximum Contaminant Levels) and EWG health guidelines, which are often stricter and based on the latest scientific research.
