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Valeurs publiées en ng/L, converties en µg/L ; un « < » indique que tous les composés étaient sous la limite de quantification. Licence de réutilisation non vérifiée pour ce document (les données ouvertes du SPW sont normalement CC BY 4.0) ; attribution SPW-ARNE et SWDE en attendant confirmation."},"pfas":{"status":"measured","sum20":{"value":0.0082,"valueText":"0,0082","unit":"µg/L","limit":0.1,"limitUnit":"µg/L","status":"ok","sampleDate":"2025-12-01T00:00:00Z","sampleId":"ZW1326:2025-12-01"},"pfas4":{"value":0.0014,"valueText":"0,0014","unit":"µg/L","limit":0.004,"limitUnit":"µg/L","status":"ok","sampleDate":"2025-12-01T00:00:00Z","sampleId":"ZW1326:2025-12-01"},"pfas4DetectedCount":1,"lowerBound":true,"sampledAt":null,"qualifiers":[{"name":"PFOS","valueText":"<0,001","unit":"µg/L"},{"name":"PFHxS","valueText":"<0,001","unit":"µg/L"},{"name":"PFNA","valueText":"<0,001","unit":"µg/L"},{"name":"PFDA","valueText":"<0,001","unit":"µg/L"},{"name":"PFUnDA","valueText":"<0,0015","unit":"µg/L"},{"name":"PFDoDA","valueText":"<0,0015","unit":"µg/L"},{"name":"PFTrDA","valueText":"<0,0015","unit":"µg/L"},{"name":"PFBS","valueText":"<0,001","unit":"µg/L"},{"name":"PFPeS","valueText":"<0,001","unit":"µg/L"},{"name":"PFHpS","valueText":"<0,001","unit":"µg/L"},{"name":"PFNS","valueText":"<0,001","unit":"µg/L"},{"name":"PFDS","valueText":"<0,0015","unit":"µg/L"},{"name":"PFUnDS","valueText":"<0,0015","unit":"µg/L"},{"name":"PFDoDS","valueText":"<0,0015","unit":"µg/L"},{"name":"PFTrDS","valueText":"<0,0015","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":"ZW1326:2025-12-01","date":"2025-12-01","commune":"25084","communeName":"Perwez","sourceUrl":"https://environnement.wallonie.be/home/gestion-environnementale/environnement-sante/pfas","networks":["ZW1326"],"sum20":{"value":0.0082,"valueText":"0,0082","unit":"µg/L","nonDetect":false,"lowerBound":false},"pfas4":{"value":0.0014,"valueText":"0,0014","unit":"µg/L","nonDetect":false,"lowerBound":false},"revision":"9b54edcc0ce85353ec22659abcf90e15f7150abfb3ba097682b63d3520f9bc11"},{"id":"ZW1326:2025-10-07","date":"2025-10-07","commune":"25084","communeName":"Perwez","sourceUrl":"https://environnement.wallonie.be/home/gestion-environnementale/environnement-sante/pfas","networks":["ZW1326"],"sum20":{"value":0.0143,"valueText":"0,0143","unit":"µg/L","nonDetect":false,"lowerBound":false},"pfas4":{"value":0.0012,"valueText":"0,0012","unit":"µg/L","nonDetect":false,"lowerBound":false},"revision":"9b3df66546d160bcb92408d76e1641a81383503f03c143562f6528a232e9efd6"},{"id":"ZW1326:2025-09-09","date":"2025-09-09","commune":"25084","communeName":"Perwez","sourceUrl":"https://environnement.wallonie.be/home/gestion-environnementale/environnement-sante/pfas","networks":["ZW1326"],"sum20":{"value":0.0109,"valueText":"0,0109","unit":"µg/L","nonDetect":false,"lowerBound":false},"pfas4":{"value":0.0016,"valueText":"0,0016","unit":"µg/L","nonDetect":false,"lowerBound":false},"revision":"886d93aeeb68227bdb110412f060f9b65295de809386f92c76efe764ad487256"},{"id":"ZW1193:2025-08-11","date":"2025-08-11","commune":"25084","communeName":"Perwez","sourceUrl":"https://environnement.wallonie.be/home/gestion-environnementale/environnement-sante/pfas","networks":["ZW1193"],"sum20":{"value":0.0014,"valueText":"0,0014","unit":"µg/L","nonDetect":false,"lowerBound":false},"pfas4":{"value":null,"valueText":"<0,004","unit":"µg/L","nonDetect":true,"lowerBound":false},"revision":"00fe3bf0ac5ffcbce57b2393e581d0fa3fced051eda9f97797a74cdc9cfc284c"},{"id":"ZW1326:2025-07-08","date":"2025-07-08","commune":"25084","communeName":"Perwez","sourceUrl":"https://environnement.wallonie.be/home/gestion-environnementale/environnement-sante/pfas","networks":["ZW1326"],"sum20":{"value":null,"valueText":"<0,0205","unit":"µg/L","nonDetect":true,"lowerBound":false},"pfas4":{"value":null,"valueText":"<0,004","unit":"µg/L","nonDetect":true,"lowerBound":false},"revision":"1d6f8b2764834700d427c1f8672ac4ebfe375758f96e4861195345cf526147b3"},{"id":"ZW1326:2025-05-06","date":"2025-05-06","commune":"25084","communeName":"Perwez","sourceUrl":"https://environnement.wallonie.be/home/gestion-environnementale/environnement-sante/pfas","networks":["ZW1326"],"sum20":{"value":null,"valueText":"<0,0205","unit":"µg/L","nonDetect":true,"lowerBound":false},"pfas4":{"value":null,"valueText":"<0,004","unit":"µg/L","nonDetect":true,"lowerBound":false},"revision":"a57de99350291bf5106675b9a9222785f0a5a6510981bb554c45d57a331f8009"},{"id":"ZW1326:2025-02-19","date":"2025-02-19","commune":"25084","communeName":"Perwez","sourceUrl":"https://environnement.wallonie.be/home/gestion-environnementale/environnement-sante/pfas","networks":["ZW1326"],"sum20":{"value":null,"valueText":"<0,027","unit":"µg/L","nonDetect":true,"lowerBound":false},"pfas4":{"value":null,"valueText":"<0,004","unit":"µg/L","nonDetect":true,"lowerBound":false},"revision":"63768e5f7e9cf414af15b5dfbb9404266c6659490803402d4bf159ff8bda691b"},{"id":"ZPERWEZ:2025-02-18","date":"2025-02-18","commune":"25084","communeName":"Perwez","sourceUrl":"https://environnement.wallonie.be/home/gestion-environnementale/enviro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