{"schemaVersion":2,"id":"us-MA3164000","communeId":"MA3164000","name":"Lynnfield Center Water District","slug":"lynnfield-center-water-district-ma3164000","country":"us","region":"Massachusetts","supplier":"LYNNFIELD CENTER WATER DISTRICT","networks":[{"code":"316400002G/10272","name":"STATION #2 (MAIN ST GP WELL) (MAIN STREET G.P. WELL)"},{"code":"316400003G/ST3","name":"STA. #3 (GWTP) - FINISHED WATER (PHILLIPS WELL 9A)"},{"code":"316400005G/10275","name":"STA. #4 (GLEN DRIVE WELLS 5G-8G) (GLEN DRIVE WELL 1)"}],"latestSampleDate":"2024-01-09T00:00:00Z","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), ion exchange (IEX), no PFAS treatment (NMT). 3 entry points sampled, 6 sampling events between 2023-05-02 and 2024-01-09. The page's PFAS values come from the newest sample at STA. #4 (GLEN DRIVE WELLS 5G-8G) (GLEN DRIVE WELL 1) (316400005G/10275), 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":0.0061,"valueText":"0.0061","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"exceeded","sampleDate":"2023-11-07T00:00:00Z","sampleId":"109535P"},"pfas4DetectedCount":1,"lowerBound":true,"sampledAt":{"commune":"MA3164000","name":"STA. #4 (GLEN DRIVE WELLS 5G-8G) (GLEN DRIVE WELL 1)","network":"316400005G/10275"},"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":"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":"112602R","date":"2024-01-09","commune":"MA3164000","communeName":"LYNNFIELD CENTER WATER DISTRICT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["316400002G/10272"],"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":"3cfb1761636554481105d6f60577e8524934e0dcaf386b80734b07a4fdb9a0da"},{"id":"109533P","date":"2023-11-07","commune":"MA3164000","communeName":"LYNNFIELD CENTER WATER 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DISTRICT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["316400003G/ST3"],"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":"083b75e7cd35d76a8b9fbd70648fbcca6223233a207aec06b79958bc88f5c63d"},{"id":"109535P","date":"2023-11-07","commune":"MA3164000","communeName":"LYNNFIELD CENTER WATER DISTRICT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["316400005G/10275"],"sum20":null,"pfas4":{"value":0.0061,"valueText":"0.0061","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":"3601c3cf4bf997159a916ad7cd78eee795ce7364c0275b6203046a30194bb165"},{"id":"103778P","date":"2023-05-02","commune":"MA3164000","communeName":"LYNNFIELD CENTER WATER DISTRICT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["316400003G/ST3"],"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":"44553ef8b8af24b452f8337812070b38b52c0f96280eaa1c7995c246abc6461c"},{"id":"103779P","date":"2023-05-02","commune":"MA3164000","communeName":"LYNNFIELD CENTER WATER DISTRICT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["316400005G/10275"],"sum20":null,"pfas4":{"value":0.0051,"valueText":"0.0051","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":"fca93c5723a9202634a14a32017a36a6fb8538a27cc9342e6dfe764f08d091a2"}],"revision":"80cad485f3ad93ed729d8152574c681edb97ab5327564412affb5ff5f6cb9b9f","us":{"pwsid":"MA3164000","state":"MA","systemType":"CWS","sizeClass":"S","sourceWater":["GW"],"counties":["Essex"],"zips":["01940"],"entryPoints":3,"samples":6,"detectedCompounds":["PFOA","PFBA","PFHxA","PFPeA"],"treatment":["GAC","IEX","NMT"],"potentialSources":"DK","pfoaMax":0.0061,"pfosMax":null,"hazardIndex":null,"centroidSource":"sab"}}