Well Water Tests Positive for Bacteria: Your Next Steps
Last Updated: October 28, 2026
Immediate Steps After a Positive Well Water Bacteria Test
A positive well water bacteria result means bacteria were detected in your sample. If you're weighing a rural purchase, here’s a guideline to well inspection cost for rural buyers that covers related concern. I'm Valerie Fields with Exodus Realty.
Total coliform bacteria live in soil and surface water.
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Addressing these biological contaminants is a critical component of maintaining a healthy home environment, much like how mold testing serves as a vital safeguard during the property acquisition process.
How to Disinfect a Well
The Environmental Protection Agency's private well guidance is a good starting point for homeowners new to well care. Your local health department can also give you the exact chlorine amount for your well's depth and diameter, since that math depends on your specific system.
Well Water Retesting After Disinfection
Wait until the chlorine is fully flushed from the system before you collect a sample. The Centers for Disease Control and Prevention's well testing guidance recommends retesting after treatment and then on a regular schedule to catch problems early.
If you are selling a rural property, what to know before selling rural land covers what buyers will ask about water and well condition, and my Free Sellers Guide walks you through preparing a home for the market.
A positive bacteria test can feel alarming, but in most cases it is a solvable problem with the right steps and a clean retest. I am Valerie Fields, REALTOR® with Exodus Realty, and I help buyers and sellers across Decatur, Rush, Franklin, Fayette, and Ripley Counties work through the practical questions that come with rural property, water, wells, and acreage. If you have real estate questions, I am glad to help you think them through. Reach out to Exodus Realty whenever you are ready to talk.
