{"schemaVersion":2,"id":"us-MA2270000","communeId":"MA2270000","name":"Shirley Water District","slug":"shirley-water-district-ma2270000","country":"us","region":"Massachusetts","supplier":"SHIRLEY WATER DISTRICT","networks":[{"code":"227000002G/02G","name":"CATACUNEMAUG RD WTP (TREATED) (CATACUNEMAUG RD)"},{"code":"227000003G/03G","name":"PATTERSON RD WTP (TREATED) (PATTERSON ROAD GRAVEL PACKED WELL)"},{"code":"227000004G/04G","name":"WALKER WELL WTP (TREATED) (WALKER WELL)"}],"latestSampleDate":"2026-01-07T00:00:00Z","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. 3 entry points sampled, 7 sampling events between 2024-04-10 and 2026-01-07. The page's PFAS values come from the newest sample at CATACUNEMAUG RD WTP (TREATED) (CATACUNEMAUG RD) (227000002G/02G), 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":0.006,"valueText":"0.006","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"exceeded","sampleDate":"2026-01-07T00:00:00Z","sampleId":"135564R"},"pfas4DetectedCount":1,"lowerBound":true,"sampledAt":{"commune":"MA2270000","name":"CATACUNEMAUG RD WTP (TREATED) (CATACUNEMAUG RD)","network":"227000002G/02G"},"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"},{"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":"NFDHA","valueText":"<0.02","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":"PFPeA","valueText":"<0.003","unit":"µg/L"},{"name":"PFPeS","valueText":"<0.004","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":"135564R","date":"2026-01-07","commune":"MA2270000","communeName":"SHIRLEY WATER DISTRICT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["227000002G/02G"],"sum20":null,"pfas4":{"value":0.006,"valueText":"0.006","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":"1e63d83856eb26bab49abade394b60390ee6d689fbb18b0c9c5d427fa0655a6f"},{"id":"121844P","date":"2025-10-01","commune":"MA2270000","communeName":"SHIRLEY WATER 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DISTRICT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["227000003G/03G"],"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":"f4e2eff82acf7ece54f286c500e9395c316061eb99d93f999a653263d5b973df"},{"id":"115856P","date":"2024-04-10","commune":"MA2270000","communeName":"SHIRLEY WATER DISTRICT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["227000004G/04G"],"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":"9ebc3454c1c984d869294a8ef74848f33f217d04db36a21e1caeaa96d9ca36b8"}],"revision":"6bd409abe3c646c35426f0b985f0954c760c24bedd2ff9d3d84bf77b3aa12d36","us":{"pwsid":"MA2270000","state":"MA","systemType":"CWS","sizeClass":"S","sourceWater":["GW"],"counties":["Middlesex"],"zips":["01464","01523"],"entryPoints":3,"samples":7,"detectedCompounds":["PFOA","PFBS","PFHpA","PFHxA","PFPeA"],"treatment":[],"potentialSources":"DK","pfoaMax":0.0069,"pfosMax":null,"hazardIndex":null,"centroidSource":"sab"}}