{"schemaVersion":2,"id":"us-MA3315000","communeId":"MA3315000","name":"Wayland Water Department","slug":"wayland-water-department-ma3315000","country":"us","region":"Massachusetts","supplier":"WAYLAND WATER DEPARTMENT","networks":[{"code":"00012/20000","name":"Entry Point to Dist. System (Baldwin Pond Treatment Facility)"},{"code":"00013/10002","name":"Entry Point to Dist. System (Campbell Road GP Well #1)"},{"code":"00014/20001","name":"Entry Point to Dist. System (Happy Hollow GP Wells 1, 2 and 3)"},{"code":"00018/10008","name":"Entry Point to Dist. System (Chamberlain GP Well)"}],"latestSampleDate":"2023-10-18T00:00:00Z","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: ion exchange (IEX), no PFAS treatment (NMT). 4 entry points sampled, 8 sampling events between 2023-04-11 and 2023-10-18. The page's PFAS values come from the newest sample at Entry Point to Dist. System (Chamberlain GP Well) (00018/10008), 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":0.012,"valueText":"0.012","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"exceeded","sampleDate":"2023-10-18T00:00:00Z","sampleId":"L2362102-01"},"pfas4DetectedCount":2,"lowerBound":true,"sampledAt":{"commune":"MA3315000","name":"Entry Point to Dist. System (Chamberlain GP Well)","network":"00018/10008"},"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":"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":"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":"L2362102-01","date":"2023-10-18","commune":"MA3315000","communeName":"WAYLAND WATER DEPARTMENT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00018/10008"],"sum20":null,"pfas4":{"value":0.012,"valueText":"0.012","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":"3f24b641698057ada8996c68075fcfab3fd93ae1602d87eb4bca95186a6abecb"},{"id":"L2362102-03","date":"2023-10-18","commune":"MA3315000","communeName":"WAYLAND WATER DEPARTMENT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00012/20000"],"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":"24e3066ab7091c4fec1e2ec4ee6cbfbb4e026041a98855f75b6ef749279a0926"},{"id":"L2362102-05","date":"2023-10-18","commune":"MA3315000","communeName":"WAYLAND WATER DEPARTMENT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00013/10002"],"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":"406d04e9c54075170216339d63230729ead481484045700aff846fca8e8788da"},{"id":"L2362102-07","date":"2023-10-18","commune":"MA3315000","communeName":"WAYLAND WATER DEPARTMENT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00014/20001"],"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":"07c73994c2a8a972aba6b349b4d9badc81848f88e253f4914daf1b4684d0706f"},{"id":"L2319327-01","date":"2023-04-11","commune":"MA3315000","communeName":"WAYLAND WATER DEPARTMENT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00013/10002"],"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":"82511fa2e909915c5dc0ee3c68b10c5d6dfb05b674e67cc5f78ad78d400377eb"},{"id":"L2319327-03","date":"2023-04-11","commune":"MA3315000","communeName":"WAYLAND WATER DEPARTMENT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00018/10008"],"sum20":null,"pfas4":{"value":0.013,"valueText":"0.013","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":"f02c21bc1fd933dd6cac86815021bfd4dc1c33188276be52acfd4fbff829307d"},{"id":"L2319327-05","date":"2023-04-11","commune":"MA3315000","communeName":"WAYLAND WATER 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DEPARTMENT","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["00012/20000"],"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":"c5b32ca31944c77420d68ac8c666f19c683ad2adf76184e1e9266f94a37bd87a"}],"revision":"9713087a2f9693a6bcb143d778f002495dee16cab57fef2e9813ae2f9438ef26","us":{"pwsid":"MA3315000","state":"MA","systemType":"CWS","sizeClass":"L","sourceWater":["GW"],"counties":["Middlesex"],"zips":["01778"],"entryPoints":4,"samples":8,"detectedCompounds":["PFOA","PFOS","PFBA","PFHpA","PFHxA","PFPeA"],"treatment":["IEX","NMT"],"potentialSources":"DK","pfoaMax":0.009,"pfosMax":0.004,"hazardIndex":null,"centroidSource":"sab"}}