Collecting a well water sample
Texas A&M AgriLife Extension says bacteria samples must go in a sterile bottle from a health department lab or extension office.
Taking the sample
Texas A&M AgriLife Extension says to sample from a cold water faucet with the aerator removed.
Texas A&M AgriLife Extension says not to sample from hot or mixing faucets, leaky faucets, treated or softened water taps, or a hose.
Texas A&M AgriLife Extension says to run the water at full flow for five minutes, then reduce it to a pencil thin stream before filling.
Texas A&M AgriLife Extension says to hold the cap in one hand, never set it down or touch the inside, and fill without overflowing.
Texas A&M AgriLife Extension says to refrigerate the sample and get it to the lab in an ice chest, ideally within six hours and no later than 30.
The Missouri State Public Health Laboratory says private well samples must reach the lab and testing must start within 48 hours of collection.
Texas A&M AgriLife Extension advises sampling on a day that lets the sample reach the lab Monday through Thursday, avoiding weekends and holidays.
Sources: Use a sterile bottle; Missouri: 48 hour limit; Avoid weekend arrival
Common questions
How do I take a well water sample?
Texas A&M AgriLife Extension says bacteria samples must go in a sterile bottle from a health department lab or extension office.