{"schemaVersion":2,"id":"us-MA3347000","communeId":"MA3347000","name":"Woburn Water Dept.","slug":"woburn-water-dept-ma3347000","country":"us","region":"Massachusetts","supplier":"WOBURN WATER DEPT.","networks":[{"code":"00001/EP001","name":"EPTDS (Red Roof Inn - Meter 230) (MWRA Connection)"},{"code":"20012/20019","name":"Entry Point to Dist. System (Horn Pond WTP)"}],"latestSampleDate":"2025-10-14T00:00:00Z","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: granular activated carbon (GAC), no PFAS treatment (NMT). 2 entry points sampled, 6 sampling events between 2025-01-14 and 2025-10-14. The page's PFAS values come from the newest sample at Entry Point to Dist. System (Horn Pond WTP) (20012/20019), 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":0.0153,"valueText":"0.0153","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"exceeded","sampleDate":"2025-07-22T00:00:00Z","sampleId":"35971041001SE2"},"pfas4DetectedCount":2,"lowerBound":true,"sampledAt":{"commune":"MA3347000","name":"Entry Point to Dist. System (Horn Pond WTP)","network":"20012/20019"},"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":"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":"35990564001SE4","date":"2025-10-14","commune":"MA3347000","communeName":"WOBURN WATER DEPT.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00001/EP001"],"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":"9da6c86de98366893fae4aa7cc125ce9a37e3d8a58b5f2c19836eaf8924dc19b"},{"id":"35971040001SE3","date":"2025-07-22","commune":"MA3347000","communeName":"WOBURN WATER DEPT.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00001/EP001"],"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":"24e3b06b2d4af5b74357e9fd662bc4cc8293879bdbfe4824c84bdab6443ec20d"},{"id":"35971041001SE2","date":"2025-07-22","commune":"MA3347000","communeName":"WOBURN WATER DEPT.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["20012/20019"],"sum20":null,"pfas4":{"value":0.0153,"valueText":"0.0153","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":"a84b59e10e9d250ba2012c9831807e6210161c90b92ce0c792c1fc68425468bc"},{"id":"35947929001SE2","date":"2025-04-08","commune":"MA3347000","communeName":"WOBURN WATER DEPT.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00001/EP001"],"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":"998ed643320929ca065d4d1cf4d80d0d239c1f14ffaa7ae56da190493c3e04d5"},{"id":"35930709001SE1","date":"2025-01-14","commune":"MA3347000","communeName":"WOBURN WATER DEPT.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00001/EP001"],"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":"ee4089877ce51b5cd16190e86d2ad89044981d14019ec16a6a4e2ed43849a1a1"},{"id":"35930709003SE1","date":"2025-01-14","commune":"MA3347000","communeName":"WOBURN WATER DEPT.","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["20012/20019"],"sum20":null,"pfas4":{"value":0.0119,"valueText":"0.0119","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":"fc462bbc36fc1f4b1f2fe67cd7799953f0ea39f1d155c7764b8b415985d9041f"}],"revision":"072514366a7ffe728bbd7e2fb4313b875cc6051dc24f9eb7b2d08d4d65842309","us":{"pwsid":"MA3347000","state":"MA","systemType":"CWS","sizeClass":"L","sourceWater":["GW","SW"],"counties":["Middlesex"],"zips":["01801","01813","01815","01888"],"entryPoints":2,"samples":6,"detectedCompounds":["PFOA","PFOS","PFBS","PFBA","PFHxA","PFPeA"],"treatment":["GAC","NMT"],"potentialSources":"Yes","pfoaMax":0.0084,"pfosMax":0.0069,"hazardIndex":0.0019,"centroidSource":"sab"}}