{"schemaVersion":2,"id":"us-NY5103705","communeId":"NY5103705","name":"Riverhead Water District","slug":"riverhead-water-district-ny5103705","country":"us","region":"New York","supplier":"RIVERHEAD WD","networks":[{"code":"07261/T07261","name":"Treated Tap (Well 2)"},{"code":"10834/T10834","name":"Treated Tap (Well 1A)"},{"code":"12945/T129453","name":"Treated Tap (Well 16-1 TP)"},{"code":"12965/T129656","name":"Treated Tap (Well 15-1, 15-2 & 15-3 Treatment TP Plant)"},{"code":"13031/T130317","name":"Treated Tap (Well17-1 TP)"},{"code":"15117/T15117","name":"Treated Tap (Well 3A)"},{"code":"17707/T17707T122918","name":"After Treatment (Well 11-1 & 11-2 TP)"},{"code":"34272/T34272T105439","name":"After Treatment (Well 7-2 & 7-3 TP)"},{"code":"78329/1","name":"Treated Tap (Well 4-1 & 4-2 TP)"},{"code":"78331/1","name":"Treated Tap (Well 5-1 & 5-2 TP)"}],"latestSampleDate":"2024-05-03T00:00:00Z","conformity":{"conclusion":null,"bacteriological":"unknown","chemical":"unknown"},"source":{"name":"U.S. Environmental Protection Agency, Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) occurrence data, final dataset (August 2026)","url":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","license":"Public domain (U.S. federal government work, 17 U.S.C. § 105)","kind":"open_data_file","verified":true,"retrievedAt":"2026-09-19T19:22:35.464Z","note":"UCMR 5 results do not indicate compliance or noncompliance with the PFAS drinking water standards. Samples are taken at the entry point to the distribution system, not at the tap; the system may have changed sources or installed treatment since. Treatment reported to EPA for PFAS: granular activated carbon (GAC), no PFAS treatment (NMT). 10 entry points sampled, 27 sampling events between 2023-06-14 and 2024-05-03. The page's PFAS values come from the newest sample at Treated Tap (Well 5-1 & 5-2 TP) (78331/1), the entry point with the highest PFOA + PFOS + PFNA + PFHxS sum; the other entry points' maxima are listed as separate rows. Non-detects are shown as \"<\" followed by EPA's minimum reporting level (3 to 20 ng/L); PFAS-4 sums quantified compounds only, so it is a lower bound when a compound was not detected. Registry (name, population, counties, ZIPs) from EPA SDWIS/ECHO; service-area centroid from EPA ORD."},"pfas":{"status":"measured","sum20":null,"pfas4":{"value":null,"valueText":"<0.015","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"ok","sampleDate":"2023-12-01T00:00:00Z","sampleId":"GL00212-05","nonDetect":true,"upperBound":0.015},"pfas4DetectedCount":0,"lowerBound":true,"sampledAt":{"commune":"NY5103705","name":"Treated Tap (Well 5-1 & 5-2 TP)","network":"78331/1"},"qualifiers":[{"name":"PFOA","valueText":"<0.004","unit":"µg/L"},{"name":"PFOS","valueText":"<0.004","unit":"µg/L"},{"name":"PFHxS","valueText":"<0.003","unit":"µg/L"},{"name":"PFNA","valueText":"<0.004","unit":"µg/L"},{"name":"HFPO-DA","valueText":"<0.005","unit":"µg/L"},{"name":"PFBS","valueText":"<0.003","unit":"µg/L"},{"name":"11Cl-PF3OUdS","valueText":"<0.005","unit":"µg/L"},{"name":"4:2 FTS","valueText":"<0.003","unit":"µg/L"},{"name":"6:2 FTS","valueText":"<0.005","unit":"µg/L"},{"name":"8:2 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