{"permit":"IA0072907","name":"HEIDELBERG MATERIALS US CEMENT LLC","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/IA0072907"},"about":[{"label":"What it is","text":"Cement, Hydraulic (EPA's industry listing)"},{"label":"Where","text":"Mason City, Iowa","href":"https://www.openstreetmap.org/?mlat=43.1768&mlon=-93.2131#map=14/43.1768/-93.2131"},{"label":"Last 12 months","text":"Over a limit 5 times, last in July 2026 (Solids, total suspended)"},{"label":"Permit","text":"In force until May 31, 2031"}],"renewal_due":null,"renewal_check":null,"sector":{"state":"IA","sic":"32","permits":5,"list":"https://passage-data.com/api/v1/permits?state=IA&sic=32","page":"https://passage-data.com/dmr/s/IA/32"},"limits_from_version":null,"record":{"last_filed":"2026-08-31","over":5,"over_by":[["Solids, total suspended",5]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"Solids, total suspended","times":5,"find_limits":{"parameter":"total suspended solids","place":"US-IA","medium":"water_discharge"},"get":"https://passage-data.com/api/v1/limits?parameter=total+suspended+solids&place=US-IA&medium=water_discharge"}],"limits":[{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"daily minimum","qualifier":">=","value":"6","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":"daily maximum","qualifier":"<=","value":"45","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Iron, total [as Fe]","parameter_code":"01045","statistic":"30-day average","qualifier":"<=","value":"1","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Iron, total [as Fe]","parameter_code":"01045","statistic":"daily maximum","qualifier":"<=","value":"1","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Iron, total [as Fe]","parameter_code":"01045","statistic":"30-day average","qualifier":"<=","value":"6.67","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"},{"outfall":"001","parameter":"Iron, total [as Fe]","parameter_code":"01045","statistic":"daily maximum","qualifier":"<=","value":"6.67","unit":"lb/d","report_only":false,"enforceable":true,"months":"all","limit_set":"MONTHLY"}],"next":[{"tool":"list_permits","says":"Screening this industry? list_permits lists every permit of it in this state in one call, each with its page and its get_permit address; `get` is the address to fetch.","arguments":{"state":"IA","sic":"32"},"needs":{},"get":"https://passage-data.com/api/v1/permits?state=IA&sic=32","url":"https://passage-data.com/api/v1/permits?state=IA&sic=32","page":"https://passage-data.com/dmr/s/IA/32"},{"tool":"find_limits","says":"What do the rules say about what it went over on? find_limits gives the cited state and federal limits for it, each with its rule; `get` is the address to fetch, and `over_limits` holds one for each parameter.","arguments":{"parameter":"total suspended solids","place":"US-IA","medium":"water_discharge"},"needs":{},"get":"https://passage-data.com/api/v1/limits?parameter=total+suspended+solids&place=US-IA&medium=water_discharge","url":"https://passage-data.com/api/v1/limits?parameter=total+suspended+solids&place=US-IA&medium=water_discharge","page":"https://passage-data.com/limits/US-IA/total-suspended-solids"},{"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":"IA0072907"},"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=IA0072907"},{"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":"IA0072907"},"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=IA0072907"}]}