{"permit":"IA0020788","name":"CITY OF CORALVILLE","state":"IA","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/IA0020788"},"about":[{"label":"What it is","text":"Sewage treatment plant · rated a major discharger by EPA"},{"label":"Where","text":"Coralville, Iowa","href":"https://www.openstreetmap.org/?mlat=41.67877&mlon=-91.59924#map=14/41.67877/-91.59924"},{"label":"Last 12 months","text":"No values over a limit"},{"label":"Permit","text":"In force until Sep 30, 2031"}],"renewal_due":null,"renewal_check":null,"sector":null,"limits_from_version":null,"record":{"last_filed":"2026-09-30","over":0,"over_by":[],"window":["2025-10-01","2026-09-30"]},"over_limits":[],"limits":[{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"daily minimum","qualifier":">=","value":"6.4","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"daily maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"30-day average","qualifier":"<=","value":"30","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"7-day average","qualifier":"<=","value":"45","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"30-day average","qualifier":"<=","value":"1440","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"7-day average","qualifier":"<=","value":"2159","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"6.8","unit":"mg/L","report_only":false,"enforceable":true,"months":["SEP"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"13.1","unit":"mg/L","report_only":false,"enforceable":true,"months":["MAR"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"15.1","unit":"mg/L","report_only":false,"enforceable":true,"months":["NOV"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"18.6","unit":"mg/L","report_only":false,"enforceable":true,"months":["JAN"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"9.9","unit":"mg/L","report_only":false,"enforceable":true,"months":["APR"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"11.3","unit":"mg/L","report_only":false,"enforceable":true,"months":["MAY"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"10.1","unit":"mg/L","report_only":false,"enforceable":true,"months":["OCT"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"6.5","unit":"mg/L","report_only":false,"enforceable":true,"months":["JUL"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"6.2","unit":"mg/L","report_only":false,"enforceable":true,"months":["AUG"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"8.5","unit":"mg/L","report_only":false,"enforceable":true,"months":["JUN"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"16.1","unit":"mg/L","report_only":false,"enforceable":true,"months":["DEC"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"18","unit":"mg/L","report_only":false,"enforceable":true,"months":["FEB"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"19.4","unit":"mg/L","report_only":false,"enforceable":true,"months":["SEP"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"18","unit":"mg/L","report_only":false,"enforceable":true,"months":["MAR"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"17.3","unit":"mg/L","report_only":false,"enforceable":true,"months":["NOV"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"18.6","unit":"mg/L","report_only":false,"enforceable":true,"months":["JAN"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"18.4","unit":"mg/L","report_only":false,"enforceable":true,"months":["APR"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"18.2","unit":"mg/L","report_only":false,"enforceable":true,"months":["MAY"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"18.5","unit":"mg/L","report_only":false,"enforceable":true,"months":["OCT"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"20.9","unit":"mg/L","report_only":false,"enforceable":true,"months":["JUL"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"19.4","unit":"mg/L","report_only":false,"enforceable":true,"months":["AUG"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"17.4","unit":"mg/L","report_only":false,"enforceable":true,"months":["JUN"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"18.7","unit":"mg/L","report_only":false,"enforceable":true,"months":["DEC"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"18","unit":"mg/L","report_only":false,"enforceable":true,"months":["FEB"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"229.5","unit":"lb/d","report_only":false,"enforceable":true,"months":["SEP"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"441.7","unit":"lb/d","report_only":false,"enforceable":true,"months":["MAR"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"508.1","unit":"lb/d","report_only":false,"enforceable":true,"months":["NOV"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"747.4","unit":"lb/d","report_only":false,"enforceable":true,"months":["JAN"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"330.9","unit":"lb/d","report_only":false,"enforceable":true,"months":["APR"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"378.1","unit":"lb/d","report_only":false,"enforceable":true,"months":["MAY"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"339.6","unit":"lb/d","report_only":false,"enforceable":true,"months":["OCT"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"218.1","unit":"lb/d","report_only":false,"enforceable":true,"months":["JUL"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"207","unit":"lb/d","report_only":false,"enforceable":true,"months":["AUG"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"285.2","unit":"lb/d","report_only":false,"enforceable":true,"months":["JUN"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"540.5","unit":"lb/d","report_only":false,"enforceable":true,"months":["DEC"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"30-day average","qualifier":"<=","value":"799.7","unit":"lb/d","report_only":false,"enforceable":true,"months":["FEB"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"882.5","unit":"lb/d","report_only":false,"enforceable":true,"months":["SEP"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"808.6","unit":"lb/d","report_only":false,"enforceable":true,"months":["MAR"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"787.7","unit":"lb/d","report_only":false,"enforceable":true,"months":["NOV"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"835.7","unit":"lb/d","report_only":false,"enforceable":true,"months":["JAN"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"840.6","unit":"lb/d","report_only":false,"enforceable":true,"months":["APR"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"823.4","unit":"lb/d","report_only":false,"enforceable":true,"months":["MAY"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"840.8","unit":"lb/d","report_only":false,"enforceable":true,"months":["OCT"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"949.4","unit":"lb/d","report_only":false,"enforceable":true,"months":["JUL"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"877.7","unit":"lb/d","report_only":false,"enforceable":true,"months":["AUG"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"784.8","unit":"lb/d","report_only":false,"enforceable":true,"months":["JUN"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"854.4","unit":"lb/d","report_only":false,"enforceable":true,"months":["DEC"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Nitrogen, ammonia total [as N]","parameter_code":"00610","statistic":"daily maximum","qualifier":"<=","value":"799.7","unit":"lb/d","report_only":false,"enforceable":true,"months":["FEB"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"E. coli","parameter_code":"51040","statistic":"geometric mean","qualifier":"<=","value":"126","unit":"#/100mL","report_only":false,"enforceable":true,"months":["MAR","APR","MAY","JUN","JUL","AUG","SEP","OCT","NOV"],"limit_set":"MONTHLY"},{"outfall":"001","parameter":"Toxicity [acute], Ceriodaphnia dubia","parameter_code":"61425","statistic":"daily maximum","qualifier":"<=","value":"1","unit":"N=0;Y=1","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Toxicity [acute], Pimephales promelas [Fathead Minnow]","parameter_code":"61427","statistic":"daily maximum","qualifier":"<=","value":"1","unit":"N=0;Y=1","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"BOD, carbonaceous [5 day, 20 C]","parameter_code":"80082","statistic":"30-day average","qualifier":"<=","value":"25","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"BOD, carbonaceous [5 day, 20 C]","parameter_code":"80082","statistic":"7-day average","qualifier":"<=","value":"40","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"BOD, carbonaceous [5 day, 20 C]","parameter_code":"80082","statistic":"30-day average","qualifier":"<=","value":"1200","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"BOD, carbonaceous [5 day, 20 C]","parameter_code":"80082","statistic":"7-day average","qualifier":"<=","value":"1920","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"}],"next":[{"tool":"check_dmr","says":"Before your user files this permit's DMR: check_dmr sets each value beside the permit's limit for that period, with EPA's violation rule's verdict.","arguments":{"permit":"IA0020788"},"needs":{"period_end":"The reporting period: its month (2026-09).","values":"The period's values as your user will file them: [{outfall, parameter, statistic, value, unit}, ...]."},"post":"/api/v1/dmr/check","url":"https://passage-data.com/api/v1/dmr/check","page":"https://passage-data.com/dmr/?permit=IA0020788"},{"tool":"fill_dmr","says":"Has your user the plant's raw daily results? fill_dmr computes the period's DMR values from them, each with the rows it came from.","arguments":{"permit":"IA0020788"},"needs":{"period_end":"The reporting period: its month (2026-09).","rows":"The plant's results: [{date, parameter, value, unit, point}, ...]; or `table`, the lab's or plant's export as text."},"post":"/api/v1/dmr/fill","url":"https://passage-data.com/api/v1/dmr/fill","page":"https://passage-data.com/dmr/?permit=IA0020788"}]}