{"schemaVersion":2,"id":"us-MA3166000","communeId":"MA3166000","name":"Manchester By the Sea DPW","slug":"manchester-by-the-sea-dpw-ma3166000","country":"us","region":"Massachusetts","supplier":"MANCHESTER BY THE SEA DPW","networks":[{"code":"316600001G/10001","name":"LINCOLN ST. WELL #1 (LINCOLN ST WELL)"},{"code":"316600001S/10004","name":"GRAVELLY POND W.T.P. (GRAVELLY POND)"}],"latestSampleDate":"2025-12-02T00:00:00Z","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). 2 entry points sampled, 7 sampling events between 2025-02-11 and 2025-12-02. The page's PFAS values come from the newest sample at LINCOLN ST. WELL #1 (LINCOLN ST WELL) (316600001G/10001), 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":0.0168,"valueText":"0.0168","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"exceeded","sampleDate":"2025-08-13T00:00:00Z","sampleId":"131275P"},"pfas4DetectedCount":2,"lowerBound":true,"sampledAt":{"commune":"MA3166000","name":"LINCOLN ST. WELL #1 (LINCOLN ST WELL)","network":"316600001G/10001"},"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":"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":"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":"135496R","date":"2025-12-02","commune":"MA3166000","communeName":"MANCHESTER BY THE SEA DPW","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["316600001S/10004"],"sum20":null,"pfas4":{"value":0.0046,"valueText":"0.0046","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":"e36d2537c53f8b32404ec936fce16ee63ae76b1af27ff00a3439b635c46939b8"},{"id":"131275P","date":"2025-08-13","commune":"MA3166000","communeName":"MANCHESTER BY THE SEA DPW","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["316600001G/10001"],"sum20":null,"pfas4":{"value":0.0168,"valueText":"0.0168","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":"6d3951c4ea6d5762362ea5e1992cb3c66fa75deab38da9a9ca9e9539b28e24aa"},{"id":"131276P","date":"2025-08-13","commune":"MA3166000","communeName":"MANCHESTER BY THE SEA DPW","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["316600001S/10004"],"sum20":null,"pfas4":{"value":0.0049,"valueText":"0.0049","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":"afeb8bcdf3c2d5e2698b0754f14c12f7b05eca2cc8054419f65159f2a4fb34fe"},{"id":"128498P","date":"2025-05-06","commune":"MA3166000","communeName":"MANCHESTER BY THE SEA DPW","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["316600001S/10004"],"sum20":null,"pfas4":{"value":0.0046,"valueText":"0.0046","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":"68401a2e6672d259583fced490bd139a0343792fc682f2387b5a70c5c55ff4ae"},{"id":"125634P","date":"2025-02-11","commune":"MA3166000","communeName":"MANCHESTER BY THE SEA DPW","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["316600001G/10001"],"sum20":null,"pfas4":{"value":0.0097,"valueText":"0.0097","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":"2104236db1815da5e113b8ceeea05bec01d058f4e5b96188c05e641cff3af280"},{"id":"125635P","date":"2025-02-11","commune":"MA3166000","communeName":"MANCHESTER BY THE SEA DPW","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["316600001S/10004"],"sum20":null,"pfas4":{"value":0.0043,"valueText":"0.0043","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":"96dd37a9013b551621c6430fe516a5a70c3e569631309c615c89cf27eee46a01"}],"revision":"789a41bbfbf1442f1279a64d1e12db1ea79a03d7ed2c4c59dfe1465efa2a7394","us":{"pwsid":"MA3166000","state":"MA","systemType":"CWS","sizeClass":"S","sourceWater":["GW","SW"],"counties":["Essex"],"zips":["01944"],"entryPoints":2,"samples":7,"detectedCompounds":["PFOA","PFOS","PFBS","PFHpA","PFHxA","PFPeA"],"treatment":["NMT"],"potentialSources":"DK","pfoaMax":0.012,"pfosMax":0.0048,"hazardIndex":0.0025,"centroidSource":"sab"}}