{"schemaVersion":2,"id":"us-NY2902851","communeId":"NY2902851","name":"Roslyn WD","slug":"roslyn-wd-ny2902851","country":"us","region":"New York","supplier":"ROSLYN WD","networks":[{"code":"01870/TO1870","name":"Entry Point to Dist. System (Well #1 GAC Plant)"},{"code":"02400/TO2400","name":"Entry Point to Dist. System (Well #2 Treatment)"},{"code":"04265/TO4265","name":"Entry Point to Dist. System (Well #3 Treatment)"},{"code":"04623/TO4623","name":"Entry Point to Dist. System (Well #4 Treatment)"},{"code":"05852/TO5852","name":"Entry Point to Dist. System (Well #5 Treatment)"},{"code":"07104/TO7104","name":"Entry Point to Dist. System (Well #6 Treatment)"},{"code":"07873/TO7873","name":"Entry Point to Dist. System (Well #7 Treatment)"},{"code":"08010/TO8010","name":"Entry Point to Dist. System (Well #8 GAC Plant)"}],"latestSampleDate":"2025-06-25T00:00:00Z","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), other treatment (OTH). 8 entry points sampled, 23 sampling events between 2024-10-02 and 2025-06-25. The page's PFAS values come from the newest sample at Entry Point to Dist. System (Well #4 Treatment) (04623/TO4623), 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":0.0054,"valueText":"0.0054","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"exceeded","sampleDate":"2025-05-07T00:00:00Z","sampleId":"35954009001SE2"},"pfas4DetectedCount":1,"lowerBound":true,"sampledAt":{"commune":"NY2902851","name":"Entry Point to Dist. System (Well #4 Treatment)","network":"04623/TO4623"},"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":"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":"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":"35957392001SE2","date":"2025-05-21","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["08010/TO8010"],"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":"63a004cdb4ab48031e25f1c2fa7d013b25a1b311647a6ca33fd1d5c41f5e65aa"},{"id":"35954009001SE2","date":"2025-05-07","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["04623/TO4623"],"sum20":null,"pfas4":{"value":0.0054,"valueText":"0.0054","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":"15f178b9455e806e5e31221286aa0ed9192a5752f235522626277af31b7817bf"},{"id":"35954009003SE2","date":"2025-05-07","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["05852/TO5852"],"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":"3c5606fccc8c13ebff77dc04d04244e8d3ddb1f2cdc4a08b5471f5646f3e6040"},{"id":"35953711001SE2","date":"2025-05-06","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["02400/TO2400"],"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":"b843a748a24c927256182ca625268cd98d332b7f208f9dd597d901e52d230c6d"},{"id":"35953711003SE2","date":"2025-05-06","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["07104/TO7104"],"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":"b44baf59755e8ade83b6e800d14adf6c673a765c0cb03f7c551d37835a500871"},{"id":"35952783001SE2","date":"2025-05-01","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["04265/TO4265"],"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":"ac03e9b845a4bbf9f2b80a7cfeae3e7f64c86fadf98aa023336da1f155513e36"},{"id":"35952783003SE2","date":"2025-05-01","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["07873/TO7873"],"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":"a4c2cc7a92bc1a0b89e95f00d60ec54bbce27e14d68055e6d6106eb57ebab636"},{"id":"35949613001SE2","date":"2025-04-15","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["01870/TO1870"],"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":"017921fd8cdc3b5951da15bab438ef392b61d18a3fd46029f3c6f0fffff9c363"},{"id":"35919118001SE1","date":"2024-11-13","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["07104/TO7104"],"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":"e2cb72d1662580a5be65b0dea85277ef294e4371ac64f0e06d9f56379e085aab"},{"id":"35919118003SE1","date":"2024-11-13","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["08010/TO8010"],"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":"b8368e027636dd3081da5f5e20738b522f6f91271057fd185926616809db0087"},{"id":"35918725001SE1","date":"2024-11-12","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["02400/TO2400"],"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":"75b9c464a2a0b736ef42042f3cf1adbb92a5a4395db87c3328d2ec760c1f5776"},{"id":"35918725003SE1","date":"2024-11-12","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["04265/TO4265"],"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":"ef1363f6f3a868f0612c35d67cf5f545a8fcd83d876cafee6d23a4013eadc0e8"},{"id":"35917524001SE1","date":"2024-11-06","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["04623/TO4623"],"sum20":null,"pfas4":{"value":0.0056,"valueText":"0.0056","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":"980a30510b4f9898a2896567f7887584c5ea92c1e4913e7898faf3dd7fa8099f"},{"id":"35917524003SE1","date":"2024-11-06","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["07873/TO7873"],"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":"a0c21680f3e7c819a896a59191845c626807b5af88cd166b7edfdda81432a6d3"},{"id":"35917788001SE1","date":"2024-11-05","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["05852/TO5852"],"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":"90f636e171f48582ba39dbba28b4b0da4b9bb500308a4d86bde6ca3bcdc7df27"},{"id":"35909801001SE1","date":"2024-10-02","commune":"NY2902851","communeName":"ROSLYN WD","sourceUrl":"https://www.epa.gov/dwucmr/occurrence-data-unregulated-contaminant-monitoring-rule","networks":["01870/TO1870"],"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":"d93bd3976a81000f852f487b16b573a0f10082ce5ec529ad47191ab5a755b6da"}],"revision":"b33d175cffe6ecb301655ddfea8a01c44ef031cd02206df592261e26f4eceb4e","us":{"pwsid":"NY2902851","state":"NY","systemType":"CWS","sizeClass":"L","sourceWater":["GW"],"counties":["Nassau"],"zips":["11576","11577"],"entryPoints":8,"samples":23,"detectedCompounds":["PFOA","PFPeA"],"treatment":["GAC","NMT","OTH"],"potentialSources":"DK","pfoaMax":0.0056,"pfosMax":null,"hazardIndex":null,"centroidSource":"sab"}}