Collect a water sample for new-well potability testing (coliform and nitrate) with proper chain of custody
domain: cdc.gov · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Use the lab-supplied sterile sample bottle and follow the lab's aseptic cold-tap collection technique
Complete the chain-of-custody or sample submission form with collector name, date/time, and well identification
Deliver the sample to a state-accredited laboratory within its required holding time
Request analysis for total coliform/E. coli and nitrate at minimum, plus any additional parameters the state requires for a new-well or real-estate closeout
Notify the well owner promptly of results, especially any coliform detection or nitrate exceedance
Known gotchas
Coliform samples have a short holding time (often under two days), and delayed delivery can invalidate results
Nitrate has a health-based Maximum Contaminant Level of 10 mg/L (as nitrogen), so an exceedance warrants prompt owner notification rather than treatment as a routine aesthetic issue
Many states require the testing lab to hold state certification for the result to count toward a permit closeout or real-estate transaction
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