{"schemaVersion":2,"id":"us-MA3073000","communeId":"MA3073000","name":"Dedham Westwood Water Dist.","slug":"dedham-westwood-water-dist-ma3073000","country":"us","region":"Massachusetts","supplier":"DEDHAM WESTWOOD WATER DIST.","networks":[{"code":"00030/00030","name":"EPTDS (Booster Station Connection-Prov. Hwy.) (MWRA Connection)"},{"code":"90001/10008","name":"Entry Point to Dist. System (White Lodge WTP)"},{"code":"90002/10009","name":"Entry Point to Dist. System (Bridge Street WTP)"}],"latestSampleDate":"2025-10-16T00:00:00Z","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). 3 entry points sampled, 8 sampling events between 2025-01-13 and 2025-10-16. The page's PFAS values come from the newest sample at Entry Point to Dist. System (White Lodge WTP) (90001/10008), 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":0.0111,"valueText":"0.0111","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"exceeded","sampleDate":"2025-07-15T00:00:00Z","sampleId":"35969490001SE2"},"pfas4DetectedCount":2,"lowerBound":true,"sampledAt":{"commune":"MA3073000","name":"Entry Point to Dist. System (White Lodge WTP)","network":"90001/10008"},"qualifiers":[{"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 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":"PFBA","valueText":"<0.005","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":"PFHpA","valueText":"<0.003","unit":"µg/L"},{"name":"PFHpS","valueText":"<0.003","unit":"µg/L"},{"name":"PFHxA","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":"35991383001SE4","date":"2025-10-16","commune":"MA3073000","communeName":"DEDHAM WESTWOOD WATER DIST.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00030/00030"],"sum20":null,"pfas4":{"value":null,"valueText":"<0.015","unit":"µg/L","nonDetect":true,"lowerBound":true,"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"}]},"revision":"431d45624ba2661078337e3565afb12728a15ca46544827971f873d6fad04be7"},{"id":"35969490001SE2","date":"2025-07-15","commune":"MA3073000","communeName":"DEDHAM WESTWOOD WATER DIST.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["90001/10008"],"sum20":null,"pfas4":{"value":0.0111,"valueText":"0.0111","unit":"µg/L","nonDetect":false,"lowerBound":true,"qualifiers":[{"name":"PFHxS","valueText":"<0.003","unit":"µg/L"},{"name":"PFNA","valueText":"<0.004","unit":"µg/L"}]},"revision":"2b952f406dfd307208bc160eac6aef819231f5c2f7ca73e5556f038d51ad0a22"},{"id":"35969490003SE2","date":"2025-07-15","commune":"MA3073000","communeName":"DEDHAM WESTWOOD WATER DIST.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["90002/10009"],"sum20":null,"pfas4":{"value":0.0047,"valueText":"0.0047","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":"b78f3520e7c4244e8f540b1a217acbe1e9be88f28adb59e688d15f1bebf04ea9"},{"id":"35969501001SE3","date":"2025-07-15","commune":"MA3073000","communeName":"DEDHAM WESTWOOD WATER DIST.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00030/00030"],"sum20":null,"pfas4":{"value":null,"valueText":"<0.015","unit":"µg/L","nonDetect":true,"lowerBound":true,"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"}]},"revision":"a1bbafc20fad98056c644d368c64ae8f08702a8b0fcd0ebc53c9f31f4dca2dbb"},{"id":"35947605001SE2","date":"2025-04-07","commune":"MA3073000","communeName":"DEDHAM WESTWOOD WATER DIST.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00030/00030"],"sum20":null,"pfas4":{"value":null,"valueText":"<0.015","unit":"µg/L","nonDetect":true,"lowerBound":true,"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"}]},"revision":"c910d1720a5679ceae615c046a72797a3ee8aab1cfbfa7df85b27718b5aa61ab"},{"id":"35930342001SE1","date":"2025-01-13","commune":"MA3073000","communeName":"DEDHAM WESTWOOD WATER DIST.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00030/00030"],"sum20":null,"pfas4":{"value":null,"valueText":"<0.015","unit":"µg/L","nonDetect":true,"lowerBound":true,"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"}]},"revision":"4a065847aefe7482572bd6629b0bdd97b0d4d2530af6e9ed4697896d07506020"},{"id":"35930342003SE1","date":"2025-01-13","commune":"MA3073000","communeName":"DEDHAM WESTWOOD WATER DIST.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["90001/10008"],"sum20":null,"pfas4":{"value":0.0115,"valueText":"0.0115","unit":"µg/L","nonDetect":false,"lowerBound":true,"qualifiers":[{"name":"PFHxS","valueText":"<0.003","unit":"µg/L"},{"name":"PFNA","valueText":"<0.004","unit":"µg/L"}]},"revision":"6227323c7317aa796a385e8034585abac8967bab754b4fa28fbad9636fc32818"},{"id":"35930342005SE1","date":"2025-01-13","commune":"MA3073000","communeName":"DEDHAM WESTWOOD WATER 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