{"schemaVersion":2,"id":"us-MA4001000","communeId":"MA4001000","name":"Abington/Rockland Joint Wtr. Works","slug":"abington-rockland-joint-wtr-works-ma4001000","country":"us","region":"Massachusetts","supplier":"ABINGTON/ROCKLAND JOINT WTR. WORKS","networks":[{"code":"10005/19400","name":"Entry Point to Dist. System (Myers Avenue WTP)"},{"code":"10344/1593","name":"Entry Point to Dist. System (Great Sandy Bottom Pond WTP)"},{"code":"10345/1594","name":"Entry Point to Dist. System (Hingham Street WTP)"}],"latestSampleDate":"2025-02-06T00:00:00Z","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), powdered activated carbon (PAC). 3 entry points sampled, 14 sampling events between 2024-05-17 and 2025-02-06. The page's PFAS values come from the newest sample at Entry Point to Dist. System (Hingham Street WTP) (10345/1594), 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":0.023,"valueText":"0.023","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"exceeded","sampleDate":"2025-02-06T00:00:00Z","sampleId":"L2506662-01"},"pfas4DetectedCount":3,"lowerBound":true,"sampledAt":{"commune":"MA4001000","name":"Entry Point to Dist. System (Hingham Street WTP)","network":"10345/1594"},"qualifiers":[{"name":"PFNA","valueText":"<0.004","unit":"µg/L"},{"name":"HFPO-DA","valueText":"<0.005","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 FTS","valueText":"<0.005","unit":"µg/L"},{"name":"9Cl-PF3ONS","valueText":"<0.002","unit":"µg/L"},{"name":"ADONA","valueText":"<0.003","unit":"µg/L"},{"name":"NEtFOSAA","valueText":"<0.005","unit":"µg/L"},{"name":"NFDHA","valueText":"<0.02","unit":"µg/L"},{"name":"NMeFOSAA","valueText":"<0.006","unit":"µg/L"},{"name":"PFDA","valueText":"<0.003","unit":"µg/L"},{"name":"PFDoA","valueText":"<0.003","unit":"µg/L"},{"name":"PFEESA","valueText":"<0.003","unit":"µg/L"},{"name":"PFHpS","valueText":"<0.003","unit":"µg/L"},{"name":"PFMBA","valueText":"<0.003","unit":"µg/L"},{"name":"PFMPA","valueText":"<0.004","unit":"µg/L"},{"name":"PFPeS","valueText":"<0.004","unit":"µg/L"},{"name":"PFTA","valueText":"<0.008","unit":"µg/L"},{"name":"PFTrDA","valueText":"<0.007","unit":"µg/L"},{"name":"PFUnA","valueText":"<0.002","unit":"µg/L"}],"comparison":{"proposed":{"value":0.0005,"period":"annual_mean","official":false,"state":"over"},"sweden":{"value":0.004,"jurisdiction":"se"},"franceSum20":{"value":0.1,"jurisdiction":"fr"}}},"samples":[{"id":"L2506661-01","date":"2025-02-06","commune":"MA4001000","communeName":"ABINGTON/ROCKLAND JOINT WTR. 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WORKS","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["10344/1593"],"sum20":null,"pfas4":{"value":0.004,"valueText":"0.004","unit":"µg/L","nonDetect":false,"lowerBound":true,"qualifiers":[{"name":"PFOS","valueText":"<0.004","unit":"µg/L"},{"name":"PFHxS","valueText":"<0.003","unit":"µg/L"},{"name":"PFNA","valueText":"<0.004","unit":"µg/L"}]},"revision":"14312545862dc5266d0194df4c187664c135a749a21977ef5c7548f5847a9f43"},{"id":"L2460860-02","date":"2024-10-18","commune":"MA4001000","communeName":"ABINGTON/ROCKLAND JOINT WTR. 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