E. coli Present in Well Water: What to Do Immediately

If E. coli is present, do not drink the well water untreated. Use bottled water or another safe source and contact your local health department or well professional.

Search: E. coli present in well water what to doUrgency: Urgent

Tests to run

E. coli
Total coliform
Nitrate
Turbidity

Next steps

Stop using the water for drinking, cooking, ice, brushing teeth, and infant formula.
Check for floodwater, septic issues, damaged well cap, cracked casing, or recent well work.
Disinfect and repair the well only after the contamination pathway is addressed.
Retest for E. coli and total coliform before using the water again.

FAQ

Is E. coli in well water an emergency?

It should be treated urgently because it can indicate fecal contamination and acute illness risk.

Will boiling remove E. coli from well water?

Boiling can kill bacteria when done correctly, but it does not fix the well source and does not remove chemical contaminants.

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Interpret once on the web. Track forever in the app.

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Educational guidance only. Always confirm important decisions with a certified laboratory, local health department, qualified water treatment professional, or clinician.