{"site_no":"05536310","name":"Calumet Union Drainage Canal Near Markham, IL","slug":"calumet-union-drainage-canal-near-markham-il","url":"https://streamflowdata.com/stations/calumet-union-drainage-canal-near-markham-il","state":"IL","county":"Cook County","lat":41.597,"lng":-87.6657222,"drainage_area_sqmi":12.6,"datum_ft":597.14,"huc_code":"07120003","river":{"name":"Calumet Union Drainage Canal","slug":"calumet-union-drainage-canal-il"},"current":{"reading_time":"2026-05-30T00:30:00+00:00","discharge_cfs":12.8,"gage_height_ft":2.59},"flood_stage":{"action_stage_ft":9,"flood_stage_ft":10,"moderate_flood_ft":10.5,"major_flood_ft":11.5},"today_statistics":{"month":6,"day":11,"p10":null,"p25":1.4,"p50":3.2,"p75":5.2,"p95":null},"recent_daily_values":[{"date":"2026-05-28","discharge_cfs":3,"gage_height_ft":2.16},{"date":"2026-05-27","discharge_cfs":3.2,"gage_height_ft":2.17},{"date":"2026-05-26","discharge_cfs":3.62,"gage_height_ft":2.2},{"date":"2026-05-25","discharge_cfs":5.39,"gage_height_ft":2.29},{"date":"2026-05-24","discharge_cfs":19.6,"gage_height_ft":2.67},{"date":"2026-05-23","discharge_cfs":3.17,"gage_height_ft":2.17},{"date":"2026-05-22","discharge_cfs":3.29,"gage_height_ft":2.18},{"date":"2026-05-21","discharge_cfs":3.63,"gage_height_ft":2.2},{"date":"2026-05-20","discharge_cfs":3.95,"gage_height_ft":2.22},{"date":"2026-05-19","discharge_cfs":5.85,"gage_height_ft":2.32},{"date":"2026-05-18","discharge_cfs":17.4,"gage_height_ft":2.61},{"date":"2026-05-17","discharge_cfs":4.07,"gage_height_ft":2.22},{"date":"2026-05-16","discharge_cfs":4.6,"gage_height_ft":2.25},{"date":"2026-05-15","discharge_cfs":4.36,"gage_height_ft":2.24},{"date":"2026-04-20","discharge_cfs":11.4,"gage_height_ft":2.51},{"date":"2026-04-19","discharge_cfs":9.83,"gage_height_ft":2.47},{"date":"2026-04-18","discharge_cfs":31.7,"gage_height_ft":2.99},{"date":"2026-04-17","discharge_cfs":11.6,"gage_height_ft":2.5},{"date":"2026-04-16","discharge_cfs":22.2,"gage_height_ft":2.82},{"date":"2026-04-15","discharge_cfs":10.7,"gage_height_ft":2.5},{"date":"2026-04-14","discharge_cfs":14.6,"gage_height_ft":2.61},{"date":"2026-04-13","discharge_cfs":27.1,"gage_height_ft":2.89},{"date":"2026-04-12","discharge_cfs":33.1,"gage_height_ft":3.08},{"date":"2026-04-11","discharge_cfs":36.6,"gage_height_ft":3.15},{"date":"2026-04-10","discharge_cfs":42.7,"gage_height_ft":3.2},{"date":"2026-04-09","discharge_cfs":38.6,"gage_height_ft":3.11},{"date":"2026-04-08","discharge_cfs":66.6,"gage_height_ft":3.62},{"date":"2026-04-07","discharge_cfs":58,"gage_height_ft":3.48},{"date":"2026-04-06","discharge_cfs":37.8,"gage_height_ft":3.16},{"date":"2026-04-05","discharge_cfs":66,"gage_height_ft":3.58},{"date":"2026-04-04","discharge_cfs":355,"gage_height_ft":6.12},{"date":"2026-04-03","discharge_cfs":125,"gage_height_ft":4.17},{"date":"2026-04-02","discharge_cfs":71.9,"gage_height_ft":3.6},{"date":"2026-04-01","discharge_cfs":17.9,"gage_height_ft":2.71},{"date":"2026-03-31","discharge_cfs":50.7,"gage_height_ft":3.13},{"date":"2026-03-30","discharge_cfs":6.11,"gage_height_ft":2.31},{"date":"2026-03-29","discharge_cfs":6.35,"gage_height_ft":2.32},{"date":"2026-03-28","discharge_cfs":6.87,"gage_height_ft":2.35},{"date":"2026-03-27","discharge_cfs":12.6,"gage_height_ft":2.55},{"date":"2026-03-26","discharge_cfs":13.3,"gage_height_ft":2.51},{"date":"2026-03-25","discharge_cfs":6.85,"gage_height_ft":2.34},{"date":"2026-03-24","discharge_cfs":24.1,"gage_height_ft":2.88},{"date":"2026-03-23","discharge_cfs":19.7,"gage_height_ft":2.77},{"date":"2026-03-22","discharge_cfs":16.9,"gage_height_ft":2.69},{"date":"2026-03-21","discharge_cfs":17.4,"gage_height_ft":2.71},{"date":"2026-03-20","discharge_cfs":32,"gage_height_ft":3.04},{"date":"2026-03-19","discharge_cfs":43.7,"gage_height_ft":3.28},{"date":"2026-03-18","discharge_cfs":31.1,"gage_height_ft":3.02},{"date":"2026-03-17","discharge_cfs":28.6,"gage_height_ft":2.98},{"date":"2026-03-16","discharge_cfs":126,"gage_height_ft":4.2},{"date":"2026-03-15","discharge_cfs":95.1,"gage_height_ft":3.37},{"date":"2026-03-14","discharge_cfs":9.46,"gage_height_ft":2.45},{"date":"2026-03-13","discharge_cfs":14.2,"gage_height_ft":2.61},{"date":"2026-03-12","discharge_cfs":25.9,"gage_height_ft":2.91},{"date":"2026-03-11","discharge_cfs":101,"gage_height_ft":4.01},{"date":"2026-03-10","discharge_cfs":26.6,"gage_height_ft":2.85},{"date":"2026-03-09","discharge_cfs":15,"gage_height_ft":2.61},{"date":"2026-03-08","discharge_cfs":14.1,"gage_height_ft":2.61},{"date":"2026-03-07","discharge_cfs":48.4,"gage_height_ft":3.32},{"date":"2026-03-06","discharge_cfs":47.1,"gage_height_ft":2.88}],"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)."}