Well Water Near a Farm: What Should You Test?

For a private well near agricultural land, prioritize nitrate, bacteria, pesticides where locally relevant, and basic chemistry that shows runoff or source changes.

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Tests to run

Nitrate
Total coliform
E. coli
Pesticides if locally relevant
Turbidity
Chloride

Next steps

Test nitrate and bacteria at least annually and after heavy rain or flooding.
Ask the lab or extension office which pesticide or herbicide panels are relevant locally.
Check chloride, TDS, and turbidity for runoff clues.
Track results over time because seasonal changes can matter.

FAQ

Can fertilizer affect well water?

Yes, fertilizer can contribute nitrate to groundwater, especially in vulnerable wells and agricultural areas.

Should I test pesticides in well water?

If your well is near agricultural activity, ask a local lab, extension service, or health department which compounds are worth testing.

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.

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