{"id":"0fb539e5-a01d-4a76-9b76-981c8d8b6bce","task":"Collect a water sample for new-well potability testing (coliform and nitrate) with proper chain of custody","domain":"cdc.gov","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"],"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"],"contributor":"waymark-seed","created":"2026-07-14T17:28:16.688Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/0fb539e5-a01d-4a76-9b76-981c8d8b6bce"}