{"site_no":"05587450","name":"Mississippi River at Grafton, IL","slug":"mississippi-river-at-grafton-il","url":"https://streamflowdata.com/stations/mississippi-river-at-grafton-il","state":"IL","county":"Jersey County","lat":38.9679722,"lng":-90.429,"drainage_area_sqmi":171300,"datum_ft":403.32,"huc_code":"07110009","river":{"name":"Mississippi River","slug":"mississippi-river"},"current":{"reading_time":"2026-05-30T00:30:00+00:00","discharge_cfs":95200,"gage_height_ft":15.43},"flood_stage":{"action_stage_ft":18,"flood_stage_ft":20,"moderate_flood_ft":24,"major_flood_ft":29},"today_statistics":{"month":6,"day":11,"p10":71000,"p25":117000,"p50":214000,"p75":261000,"p95":386000},"recent_daily_values":[{"date":"2026-05-28","discharge_cfs":87600,"gage_height_ft":null},{"date":"2026-05-27","discharge_cfs":99600,"gage_height_ft":null},{"date":"2026-05-26","discharge_cfs":109000,"gage_height_ft":null},{"date":"2026-05-25","discharge_cfs":106000,"gage_height_ft":null},{"date":"2026-05-24","discharge_cfs":131000,"gage_height_ft":null},{"date":"2026-05-23","discharge_cfs":166000,"gage_height_ft":null},{"date":"2026-05-22","discharge_cfs":168000,"gage_height_ft":null},{"date":"2026-05-21","discharge_cfs":168000,"gage_height_ft":null},{"date":"2026-05-20","discharge_cfs":179000,"gage_height_ft":null},{"date":"2026-05-19","discharge_cfs":174000,"gage_height_ft":null},{"date":"2026-05-18","discharge_cfs":108000,"gage_height_ft":null},{"date":"2026-05-17","discharge_cfs":102000,"gage_height_ft":null},{"date":"2026-05-16","discharge_cfs":112000,"gage_height_ft":null},{"date":"2026-05-15","discharge_cfs":168000,"gage_height_ft":null},{"date":"2026-04-20","discharge_cfs":279000,"gage_height_ft":null},{"date":"2026-04-19","discharge_cfs":272000,"gage_height_ft":null},{"date":"2026-04-18","discharge_cfs":263000,"gage_height_ft":null},{"date":"2026-04-17","discharge_cfs":261000,"gage_height_ft":null},{"date":"2026-04-16","discharge_cfs":262000,"gage_height_ft":null},{"date":"2026-04-15","discharge_cfs":257000,"gage_height_ft":null},{"date":"2026-04-14","discharge_cfs":253000,"gage_height_ft":null},{"date":"2026-04-13","discharge_cfs":250000,"gage_height_ft":null},{"date":"2026-04-12","discharge_cfs":249000,"gage_height_ft":null},{"date":"2026-04-11","discharge_cfs":248000,"gage_height_ft":null},{"date":"2026-04-10","discharge_cfs":245000,"gage_height_ft":null},{"date":"2026-04-09","discharge_cfs":240000,"gage_height_ft":null},{"date":"2026-04-08","discharge_cfs":236000,"gage_height_ft":null},{"date":"2026-04-07","discharge_cfs":232000,"gage_height_ft":null},{"date":"2026-04-06","discharge_cfs":233000,"gage_height_ft":null},{"date":"2026-04-05","discharge_cfs":232000,"gage_height_ft":null},{"date":"2026-04-04","discharge_cfs":226000,"gage_height_ft":null},{"date":"2026-04-03","discharge_cfs":211000,"gage_height_ft":null},{"date":"2026-04-02","discharge_cfs":185000,"gage_height_ft":null},{"date":"2026-04-01","discharge_cfs":160000,"gage_height_ft":null},{"date":"2026-03-31","discharge_cfs":126000,"gage_height_ft":null},{"date":"2026-03-30","discharge_cfs":129000,"gage_height_ft":null},{"date":"2026-03-29","discharge_cfs":142000,"gage_height_ft":null},{"date":"2026-03-28","discharge_cfs":123000,"gage_height_ft":null},{"date":"2026-03-27","discharge_cfs":116000,"gage_height_ft":null},{"date":"2026-03-26","discharge_cfs":125000,"gage_height_ft":null},{"date":"2026-03-25","discharge_cfs":128000,"gage_height_ft":null},{"date":"2026-03-24","discharge_cfs":125000,"gage_height_ft":null},{"date":"2026-03-23","discharge_cfs":137000,"gage_height_ft":null},{"date":"2026-03-22","discharge_cfs":127000,"gage_height_ft":null},{"date":"2026-03-21","discharge_cfs":153000,"gage_height_ft":null},{"date":"2026-03-20","discharge_cfs":183000,"gage_height_ft":null},{"date":"2026-03-19","discharge_cfs":186000,"gage_height_ft":null},{"date":"2026-03-18","discharge_cfs":182000,"gage_height_ft":null},{"date":"2026-03-17","discharge_cfs":186000,"gage_height_ft":null},{"date":"2026-03-16","discharge_cfs":176000,"gage_height_ft":null},{"date":"2026-03-15","discharge_cfs":173000,"gage_height_ft":null},{"date":"2026-03-14","discharge_cfs":147000,"gage_height_ft":null},{"date":"2026-03-13","discharge_cfs":151000,"gage_height_ft":null},{"date":"2026-03-12","discharge_cfs":160000,"gage_height_ft":null},{"date":"2026-03-11","discharge_cfs":121000,"gage_height_ft":null},{"date":"2026-03-10","discharge_cfs":85500,"gage_height_ft":null},{"date":"2026-03-09","discharge_cfs":106000,"gage_height_ft":null},{"date":"2026-03-08","discharge_cfs":104000,"gage_height_ft":null},{"date":"2026-03-07","discharge_cfs":86600,"gage_height_ft":null},{"date":"2026-03-06","discharge_cfs":79700,"gage_height_ft":null}],"sources":{"usgs_nwis":"https://waterdata.usgs.gov/nwis","noaa_nwps":"https://api.water.noaa.gov/nwps/v1"},"license":"USGS data is in the public domain. Attribution: USGS National Water Information System (NWIS)."}