{"schema_version":"1.2","pwsid":"WI2680277","system_name":"PRAIRIE VILLAGE WATER TRUST","city":"NORTH PRAIRIE","state":"WI","population_served":2100,"source_type":"GW","summary":"PRAIRIE VILLAGE WATER TRUST serves approximately 2,100 people in NORTH PRAIRIE, Wisconsin. Based on contaminant analyses from DNR, WQP, EPA ECHO, 3 contaminants have been measured above federal EPA standards (MCL) and 5 exceed health-based guidelines. The most significant finding is PFOS (Perfluorooctane Sulfonate) at 13 ng/L, which is 3.3x the EPA legal limit. Data is drawn from source-level compliance monitoring and covers 2000 through 2026. Results reflect conditions at the point of collection (wells, treatment plants), not necessarily at the tap.","data_period":{"start":"2000-04-11","end":"2026-09-09"},"contaminants_tested":56,"contaminants_detected":24,"exceedances":3,"guideline_exceedances":5,"contaminants":[{"name":"Chlorine (free)","code":"0700","cas_number":null,"group":"disinfectants","section":"other_detected","measured_value":0.36,"unit":"mg/L","sample_date":"2026-09-09","source":"DNR","source_scope":"source_monitoring","health_guideline_value":4,"health_guideline_source":"EPA MCLG","epa_mcl_value":4,"status":"below_limits","detection_limit":null},{"name":"PFHpA (Perfluoroheptanoic 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Uranium)","code":"4000_EXCL","cas_number":null,"group":"radionuclides","section":"legal_violation","measured_value":16.8,"unit":"pCi/L","sample_date":"2026-01-08","source":"DNR","source_scope":"source_monitoring","health_guideline_value":null,"health_guideline_source":null,"epa_mcl_value":15,"status":"exceeds_legal_limit","detection_limit":null},{"name":"Fluoride (natural)","code":"FLUORIDE","cas_number":"16984-48-8","group":"inorganics","section":"other_detected","measured_value":0.063,"unit":"mg/L","sample_date":"2026-01-08","source":"DNR","source_scope":"source_monitoring","health_guideline_value":4,"health_guideline_source":"EPA MCLG","epa_mcl_value":4,"status":"below_limits","detection_limit":null},{"name":"Barium","code":"BARIUM","cas_number":"7440-39-3","group":"inorganics","section":"other_detected","measured_value":0.065,"unit":"mg/L","sample_date":"2026-01-08","source":"DNR","source_scope":"source_monitoring","health_guideline_value":1,"health_guideline_source":"OEHHA PHG 2003 (hypertension endpoint)","epa_mcl_value":2,"status":"below_limits","detection_limit":null},{"name":"Uranium","code":"4006","cas_number":"7440-61-1","group":"radionuclides","section":"other_detected","measured_value":0.366,"unit":"ug/L","sample_date":"2026-01-08","source":"DNR","source_scope":"source_monitoring","health_guideline_value":0.0005,"health_guideline_source":"OEHHA PHG","epa_mcl_value":0.03,"status":"below_limits","detection_limit":null},{"name":"Combined Radium (226+228)","code":"4010","cas_number":null,"group":"radionuclides","section":"other_detected","measured_value":4.61,"unit":"pCi/L","sample_date":"2026-01-08","source":"DNR","source_scope":"source_monitoring","health_guideline_value":0,"health_guideline_source":"EPA MCLG","epa_mcl_value":5,"status":"approaching","detection_limit":null},{"name":"Radon","code":"RADON","cas_number":"10043-92-2","group":"radionuclide","section":"other_detected","measured_value":34.8,"unit":"pCi/L","sample_date":"2025-08-25","source":"DNR","source_scope":"source_monitoring","health_guideline_value":300,"health_guideline_source":"EPA proposed MCL (1999, never finalized)","epa_mcl_value":null,"status":"below_limits","detection_limit":null},{"name":"Cadmium","code":"1010","cas_number":null,"group":"inorganics","section":"other_detected","measured_value":0.00002,"unit":"mg/L","sample_date":"2025-08-20","source":"DNR","source_scope":"source_monitoring","health_guideline_value":0.005,"health_guideline_source":"EPA 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ECHO","url":"https://echo.epa.gov/"}],"pfas_combined_display":{"value":17,"unit":"ng/L","sample_date":"2026-07-06","note":"Legacy 2016 EPA Health Advisory combined PFOA+PFOS metric. Not a current MCL."},"well_counts":{"active":3,"retired":0,"facilities_synced_at":"2026-10-15T05:00:54.057Z"},"historical_wells":[],"has_only_historical_data":false,"pfas_hazard_index":{"value":0.3355,"compounds_used":["PFHXS","PFNA","PFBS"],"is_partial":true,"threshold":1,"components":[{"code":"PFHXS","value_ng_l":2.8,"hbwc_ng_l":10,"ratio":0.28},{"code":"PFNA","value_ng_l":0.53,"hbwc_ng_l":10,"ratio":0.053},{"code":"PFBS","value_ng_l":4.9,"hbwc_ng_l":2000,"ratio":0.0025}]},"tthm_lraa":[{"monitoring_point":"system_wide","value":6.7,"unit":"ug/L","quarters_used":["2023Q3","2024Q3","2025Q3","2026Q3"],"sample_count":4,"mcl":80,"exceeds_mcl":false}],"haa5_lraa":[{"monitoring_point":"system_wide","value":2.72,"unit":"ug/L","quarters_used":["2023Q3","2024Q3","2025Q3","2026Q3"],"sample_count":4,"mcl":60,"exceeds_mcl":false}]}