Annual well water test
Annual · typically April–June
Why it matters
You're on well water, which means you are your own water utility — no city lab is checking your water, ever. The EPA's rules stop at the municipal system; private wells are entirely on the owner.
Spring is the right time to sample: snowmelt and heavy rains push surface contamination into groundwater, so a clean spring test is a meaningful clean.
What skipping it costs
$0–$10,000
Nobody regulates your well but you. Contamination has no taste at the levels that matter — a failed septic system two properties uphill shows up in your glass, not your nose. The test is $40; the years of not knowing are the real cost.
Two ways to get it done
Do it yourself
You'll need: State-certified lab test kit (coliform + nitrates, ~$25–$60).
- Get a kit from a state-certified lab — your county health department or state lab mails them. Skip the instant-read strips from the hardware store; they can't see what matters.
- Sample from an inside tap per the lab's instructions: remove the aerator, flame or sanitize the faucet tip, run cold water 5 minutes, fill without touching the bottle rim.
- Get it to the lab within their window (usually 24–30 hours) — bacteria samples expire fast.
- Baseline year: add arsenic, lead, and anything your county flags (your state's private-well program lists local concerns). After that, coliform + nitrates annually, the full panel every 3–5 years.
- Reading results: total coliform positive → retest immediately; if it confirms, shock-chlorinate and test again. E. coli positive → bottled water now, then fix and retest. Nitrates over 10 mg/L matters urgently for infants and pregnancy.
Hire it out
$100–$250National fair range — local labor moves this number.
A water-sampling service visit runs $100–$250 and mostly buys you chain-of-custody sampling — worth it for real-estate transactions or a contamination dispute, unnecessary for the annual check.
Where well owners get hurt is the "free water test" from treatment companies: it finds hardness (cosmetic), calls it a crisis, and quotes a $4,000 system. Take any treatment recommendation back to your actual lab report, and remember the county extension office will interpret it for free.
Ask the tech
- Which certified lab runs the analysis, and can results come directly to me?
- Are you testing at the wellhead and at the tap, or just one?
- What's included beyond bacteria and nitrates?
Red flags you're being upsold
- Free 'water tests' from treatment-system companies — that's a sales appointment with a test strip.
- A treatment system quoted from hardness alone. Hard water is a comfort issue, not a safety issue.
- Anyone who won't give you the raw lab report.
Second opinion time: Any treatment system quote over $2,000 — take the lab report to your county extension office first; they'll read it for free with nothing to sell you.
The call
DIY the sample, always use a state-certified lab, and never buy treatment from the company that ran a free test.