Which Filter After a Positive Bacteria Test in Well Water?

Do not choose a filter before understanding why bacteria were present. Inspect the well, correct the source, disinfect if appropriate, and consider UV or continuous disinfection only when needed.

Search: well water filter after positive bacteria testUrgency: Urgent

Tests to run

Total coliform
E. coli
Turbidity
Nitrate

Next steps

Use alternate water until bacteria retesting is clear.
Inspect the well cap, casing, seal, plumbing, and nearby contamination sources.
Shock chlorinate only according to local guidance and after addressing obvious defects.
Consider UV or continuous chlorination for recurring bacteria after source correction.

FAQ

Can a carbon filter remove coliform bacteria?

No. Carbon is not a reliable bacteria treatment and can become a place where microbes grow if misused.

Is UV better than shock chlorination?

They solve different problems. Shock chlorination disinfects the well system temporarily, while UV treats water passing through the unit.

Download iOS App

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

Save test history, set annual reminders, compare results over time, and create a shareable report.

Download the iOS app

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