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If E. coli or other fecal coliform bacteria are in well water, the water has come into contact with human or animal waste and could cause disease. People who drink water from a private well should have the water tested at least once a year to make sure that it is safe to drink.
Are coliform bacteria just a well water problem? No. Naturally occurring coliforms can contaminate any surface water source — that’s why municipal water is disinfected. Occasionally, however, a public water system may issue boil orders because samples tested positive for coliforms.
In this guide, we’ll share everything you need to know about coliform bacteria in well water, including how this pathogen gets into water supplies, why it’s so dangerous, and how to eliminate it from your water supply.
Key points. Test your well water at least once every year for total coliform bacteria, nitrates, total dissolved solids, and pH level. Contact your health department to find out what other germs or chemicals to test for based on where you live. Use a state-certified laboratory to test your water.
Removing Bacteria from Drinking Water. Problems with wells or springs that test positive for coliform bacteria can sometimes be solved with relatively simple actions. If your water supply tests positive, consider the following steps to solve the problem.
Presence of coliform bacteria indicates water contamination and the presence of intestinal parasites and pathogens in a water supply. What are some sources of coliform bacteria? Sources of these bacteria include runoff from woodlands, pastures, feedlots, septic tanks, and sewage plants.
Jennifer Byrd. If you drink from a private well water source, you’re probably at least somewhat familiar with coliform bacteria. Commonly found in soil and plants, most coliform bacteria are usually harmless.