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

StateViolationsSystems
Florida7,905929
Texas2,479886
Alaska1,32958
Puerto Rico1,19897
Oregon977288
Oklahoma790222
Colorado743174
Arizona717223
Utah616204
Idaho590164
Connecticut514108
Montana464177
Missouri451187
Georgia406164
New Mexico397140
New Jersey382151
Michigan347154
South Carolina21286
Indiana18578
New Hampshire180100

Water Systems with Most Total Coliform Violations