Well Water Nerd

Total coliform in Texas well water

In Texas, 0% of 13 tested private well samples exceeded the EPA limit for total coliform (0 MPN/100mL).

Coliform bacteria live in soil and on plants as well as in sewage. Their presence means surface water or soil is getting into the well through the cap, casing or a nearby defect. Most coliforms are harmless, but they mean disease-causing organisms can get in the same way.

Check your total coliform number

Type the value from your lab report. It is compared to the EPA limit, the same way the full interpretation does it.

Getting it fixed

Book a free in-home water test with a licensed local company, or see the treatment guide for what removes total coliform.

Sources

  • Individual samples from the USGS Water Quality Portal and state monitoring, summarized per geography. total coliform counts and shares are listed on each county and town page with their sources.