Find a Water Test Add or claim a listing

Your well water test came back bad. Now what?

A positive bacteria result usually means shock chlorinating the well, finding how contamination got in, and retesting. Chemical problems like nitrates, arsenic or iron usually need a treatment system matched to the specific contaminant.

How to do it

  1. If E. coli is present, switch to bottled water or boil water for drinking and cooking until it's fixed.
  2. Inspect the well cap and casing for gaps, and look for nearby septic or runoff issues.
  3. Shock chlorinate the well (or hire a well contractor), then retest after the chlorine flushes out.
  4. For chemical contaminants, get quotes for treatment matched to that contaminant, and ask for a post-install test.
  5. Retest on a schedule to confirm the fix holds.

What to avoid

Certified labs for retesting

Wisconsin 25Ohio 21Minnesota 15Massachusetts 9Baltimore, MD 6Milwaukee, WI 6New Haven County, CT 5Maryland 5Hennepin County, MN 5Green Bay, WI 5Pennsylvania 4Fairfield County, CT 4Washington County, WI 4Walworth County, WI 4Connecticut 3Hartford County, CT 3Essex County, MA 3Summit County, OH 3Cincinnati, OH 3Franklin County, OH 3Stevens Point, WI 3Door County, WI 3Waukesha County, WI 3Racine County, WI 3Milwaukee County, WI 3Superior, WI 3Ozaukee County, WI 3Oshkosh, WI 3Port Washington, WI 3Madison, WI 3Stratford, CT 2Aberdeen, MD 2Harford County, MD 2Carroll County, MD 2Prince George's County, MD 2Anne Arundel County, MD 2Towson, MD 2Frederick County, MD 2Stevensville, MD 2Frederick, MD 2

Bad result? Get help from water treatment pros near your area

Tell us what your test found and we'll connect you with up to three local water treatment companies.

What happens next

  1. We match your ZIP to water treatment companies nearby.
  2. They contact you directly to talk through your results.
  3. Compare options and pick one, or none. No fee, no obligation.

Free, no obligation. We don't sell your details to anyone else.

Just need a lab? Every certified lab is listed above with directions.