Total Coliform in Drinking Water
What you need to know about total coliform in your tap water.
EPA Limit (MCL)
N/A presence
EPA Goal (MCLG)
0 presence
Category
Microbiological
Health Effects
Indicates possible presence of harmful bacteria
Common Sources
Naturally present in the environment
How to Remove Total Coliform from Water
Recommended filtration methods: Disinfection (chlorine, UV)
22,491
Total Violations
5,367
Systems Affected
Total Coliform Violations by State
| State | Violations | Systems |
|---|---|---|
| Florida | 7,905 | 929 |
| Texas | 2,479 | 886 |
| Alaska | 1,329 | 58 |
| Puerto Rico | 1,198 | 97 |
| Oregon | 977 | 288 |
| Oklahoma | 790 | 222 |
| Colorado | 743 | 174 |
| Arizona | 717 | 223 |
| Utah | 616 | 204 |
| Idaho | 590 | 164 |
| Connecticut | 514 | 108 |
| Montana | 464 | 177 |
| Missouri | 451 | 187 |
| Georgia | 406 | 164 |
| New Mexico | 397 | 140 |
| New Jersey | 382 | 151 |
| Michigan | 347 | 154 |
| South Carolina | 212 | 86 |
| Indiana | 185 | 78 |
| New Hampshire | 180 | 100 |
Water Systems with Most Total Coliform Violations
GRAYLING WATER SYSTEM
207 served243 violations
F
KWIGILLINGOK WASHETERIA
400 served195 violations
D
RIVIERA BEACH UTILITY DISTRICT, CITY OF
46,762 served192 violations
D
AKUTAN
95 served148 violations
D
FORT LAUDERDALE, CITY OF
185,163 served133 violations
C
ALAKANUK WATER SYSTEM
570 served129 violations
F
NATIVE VILLAGE OF SLEETMUTE
82 served106 violations
F
CANDLEWOOD SHORES TAX DISTRICT
1,315 served84 violations
C
NUNAM IQUA WATER SYSTEM
213 served83 violations
F
METROPOLITANO
1,077,332 served70 violations
F