{"schemaVersion":2,"id":"us-MA2032000","communeId":"MA2032000","name":"Blackstone Water Department","slug":"blackstone-water-department-ma2032000","country":"us","region":"Massachusetts","supplier":"BLACKSTONE WATER DEPARTMENT","networks":[{"code":"203200002G/MULT6","name":"ELM ST. WATER TREATMENT FACILITY (Well Treatment) (Well Treatment Facility (7 wells))"}],"latestSampleDate":"2025-10-07T00:00:00Z","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. Treatment reported to EPA for PFAS: other treatment (OTH). 1 entry point sampled, 2 sampling events between 2025-04-07 and 2025-10-07. The page's PFAS values come from the newest sample at ELM ST. WATER TREATMENT FACILITY (Well Treatment) (Well Treatment Facility (7 wells)) (203200002G/MULT6). 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":0.0057,"valueText":"0.0057","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"exceeded","sampleDate":"2025-10-07T00:00:00Z","sampleId":"133196P"},"pfas4DetectedCount":1,"lowerBound":true,"sampledAt":{"commune":"MA2032000","name":"ELM ST. WATER TREATMENT FACILITY (Well Treatment) (Well Treatment Facility (7 wells))","network":"203200002G/MULT6"},"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":"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":"PFPeA","valueText":"<0.003","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":"133196P","date":"2025-10-07","commune":"MA2032000","communeName":"BLACKSTONE WATER DEPARTMENT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["203200002G/MULT6"],"sum20":null,"pfas4":{"value":0.0057,"valueText":"0.0057","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":"3b956c2719cc3d6b88163578faec467a4667bc9123e25f92a696fffc4a1c8953"},{"id":"127529P","date":"2025-04-07","commune":"MA2032000","communeName":"BLACKSTONE WATER DEPARTMENT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["203200002G/MULT6"],"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":"9f9ef17974ae108d49e1285800baca72009a5331e86c925ed611945c61efae05"}],"revision":"8054e574b4ee5d9c9ea804df4ea88328374131c0c977606464a2e0b88321c9bb","us":{"pwsid":"MA2032000","state":"MA","systemType":"CWS","sizeClass":"S","sourceWater":["GW"],"counties":["Worcester"],"zips":["01504"],"entryPoints":1,"samples":2,"detectedCompounds":["PFOA"],"treatment":["OTH"],"potentialSources":"No","pfoaMax":0.0057,"pfosMax":null,"hazardIndex":null,"centroidSource":"sab"}}