Well Water Nerd

E. coli in New Hampshire well water

In New Hampshire, 4% of 46 tested private well samples exceeded the EPA limit for E. coli (0 MPN/100mL).

E. coli in a well means fecal contamination from septic systems, animals or surface water entering the well. It can cause serious gastrointestinal illness. Any detection is a failure.

Sources

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