{"schemaVersion":2,"id":"us-MA3320000","communeId":"MA3320000","name":"Wenham Water Dept.","slug":"wenham-water-dept-ma3320000","country":"us","region":"Massachusetts","supplier":"WENHAM WATER DEPT.","networks":[{"code":"332000001G/10004","name":"WELLS #1 & #2 (GP WELL  1)"}],"latestSampleDate":"2024-11-06T00:00:00Z","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: no PFAS treatment (NMT). 1 entry point sampled, 2 sampling events between 2024-05-14 and 2024-11-06. The page's PFAS values come from the newest sample at WELLS #1 & #2 (GP WELL  1) (332000001G/10004). 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":0.0108,"valueText":"0.0108","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"exceeded","sampleDate":"2024-11-06T00:00:00Z","sampleId":"122725P"},"pfas4DetectedCount":2,"lowerBound":true,"sampledAt":{"commune":"MA3320000","name":"WELLS #1 & #2 (GP WELL  1)","network":"332000001G/10004"},"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":"PFHpA","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":"122725P","date":"2024-11-06","commune":"MA3320000","communeName":"WENHAM WATER DEPT.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["332000001G/10004"],"sum20":null,"pfas4":{"value":0.0108,"valueText":"0.0108","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":"aca5263cc1034d9953a539b56e8a82d014298b2337335a564e228e3674171d68"},{"id":"116362P","date":"2024-05-14","commune":"MA3320000","communeName":"WENHAM WATER DEPT.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["332000001G/10004"],"sum20":null,"pfas4":{"value":0.0136,"valueText":"0.0136","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":"b5b381a245fccf8d8e60406dddacef19814e250cec993d44010d5df9a089ab18"}],"revision":"af170fc8a50465d350e13a819be445f1bad691b795495c682360285180845cf8","us":{"pwsid":"MA3320000","state":"MA","systemType":"CWS","sizeClass":"S","sourceWater":["GW"],"counties":["Essex"],"zips":["01982","01984"],"entryPoints":1,"samples":2,"detectedCompounds":["PFOA","PFOS","PFBS","PFHxA","PFPeA"],"treatment":["NMT"],"potentialSources":"No","pfoaMax":0.0072,"pfosMax":0.0064,"hazardIndex":0.0017,"centroidSource":"sab"}}