{"schemaVersion":2,"id":"us-MA4171000","communeId":"MA4171000","name":"Marshfield Water Department","slug":"marshfield-water-department-ma4171000","country":"us","region":"Massachusetts","supplier":"MARSHFIELD WATER DEPARTMENT","networks":[{"code":"90001/10009","name":"Entry Point to Dist. System (Mt. Skirgo Wells)"},{"code":"90002/10004","name":"Entry Point to Dist. System (Furnace Brook Well 2)"},{"code":"90003/10005","name":"Entry Point to Dist. System (Furnace Brook Well 3)"},{"code":"90004/10006","name":"Entry Point to Dist. System (Furnace Brook Well 4)"},{"code":"90005/10012","name":"Entry Point to Dist. System (S. River Street Well)"},{"code":"90006/10011","name":"Entry Point to Dist. System (School Street Well)"},{"code":"90007/10015","name":"Entry Point to Dist. System (Webster Well 1)"},{"code":"90008/10002","name":"Entry Point to Dist. System (Ferry Street Well)"},{"code":"90009/10016","name":"Entry Point to Dist. System (Webster Well 2)"},{"code":"90010/10001","name":"Entry Point to Dist. System (Church Street Well)"},{"code":"90011/10013","name":"Entry Point to Dist. System (Union Station 1)"},{"code":"90012/10014","name":"Entry Point to Dist. System (Union Station 2)"},{"code":"90013/10051","name":"Entry Point to Dist. System (Spring Street Well)"},{"code":"90014/10007","name":"Entry Point to Dist. System (Furnace Brook Well 1A)"},{"code":"90015/10064","name":"Entry Point to Dist. System (Ferry Street 2 Wellfield)"},{"code":"90016/10067","name":"Entry Point to Dist. System (Fairgrounds Well)"}],"latestSampleDate":"2025-03-19T00:00:00Z","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: no PFAS treatment (NMT). 16 entry points sampled, 46 sampling events between 2024-03-05 and 2025-03-19. The page's PFAS values come from the newest sample at Entry Point to Dist. System (Furnace Brook Well 1A) (90014/10007), 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":0.0068,"valueText":"0.0068","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"exceeded","sampleDate":"2025-01-29T00:00:00Z","sampleId":"810-136030-1"},"pfas4DetectedCount":1,"lowerBound":true,"sampledAt":{"commune":"MA4171000","name":"Entry Point to Dist. 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