{"permit":"MT0030180","name":"YELLOWSTONE ENERGY LIMITED PARTNERSHIP                                          ","state":"MT","as_of":"2026-10-22","source":{"publisher":"U.S. EPA — ECHO / ICIS-NPDES national file","as_of":"2026-10-22","page":"/dmr/p/MT0030180"},"about":[{"label":"What it is","text":"Electric Services (EPA's industry listing)"},{"label":"Where","text":"Billings, Montana","href":"https://www.openstreetmap.org/?mlat=45.8122&mlon=-108.43012#map=14/45.8122/-108.43012"},{"label":"Last 12 months","text":"Over a limit 20 times, last in August 2026 (Copper, total recoverable)"},{"label":"Permit","text":"Expired Apr 30, 2019; its limits still apply until a new permit is issued, and EPA still expects the reports"}],"renewal_due":null,"renewal_check":{"offered_because":"permit_expired","application_due":"2018-11-01","price":"free while piloted","order_page":"https://passage-data.com/dmr/p/MT0030180#renewal","says":"Each limit a renewal could tighten or add, from the state's water-quality standards and the federal rules for this kind of discharge, each cited to its rule, beside EPA's 12-month record; a rule we do not hold is named, never guessed. A person orders it on the permit's page with their email; it is sent by email within 5 business days."},"sector":{"state":"MT","sic":"4911","permits":3,"list":"https://passage-data.com/api/v1/permits?state=MT&sic=4911","page":"https://passage-data.com/dmr/s/MT/4911"},"limits_from_version":null,"record":{"last_filed":"2026-08-31","over":20,"over_by":[["Copper, total recoverable",20]],"window":["2025-10-01","2026-09-30"]},"over_limits":[{"parameter":"Copper, total recoverable","times":20,"find_limits":{"parameter":"copper","place":"US-MT","medium":"surface_water"},"get":"https://passage-data.com/api/v1/limits?parameter=copper&place=US-MT&medium=surface_water"}],"limits":[{"outfall":"001","parameter":"Flow rate","parameter_code":"00056","statistic":"30-day average","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Flow rate","parameter_code":"00056","statistic":"daily maximum","qualifier":null,"value":null,"unit":"MGD","report_only":true,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Flow rate","parameter_code":"00056","statistic":"quarterly average","qualifier":null,"value":null,"unit":"gal/d","report_only":true,"enforceable":true,"months":"all","limit_set":"UPSTREAM MONITORING"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"minimum","qualifier":">=","value":"6","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"maximum","qualifier":"<=","value":"9","unit":"SU","report_only":false,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"pH","parameter_code":"00400","statistic":"quarterly average","qualifier":null,"value":null,"unit":"SU","report_only":true,"enforceable":true,"months":"all","limit_set":"UPSTREAM MONITORING"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"monthly average","qualifier":"<=","value":"30","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Solids, total suspended","parameter_code":"00530","statistic":"daily maximum","qualifier":"<=","value":"100","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Oil and grease, hexane extr method","parameter_code":"00552","statistic":"monthly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Oil and grease, hexane extr method","parameter_code":"00552","statistic":"daily maximum","qualifier":"<=","value":"10","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"quarterly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"QUARTERLY MONITORING"},{"outfall":"001","parameter":"Phosphorus, total [as P]","parameter_code":"00665","statistic":"quarterly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"UPSTREAM MONITORING"},{"outfall":"001","parameter":"Hardness, total [as CaCO3]","parameter_code":"00900","statistic":"quarterly average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"UPSTREAM MONITORING"},{"outfall":"001","parameter":"Zinc, total recoverable","parameter_code":"01094","statistic":"monthly average","qualifier":"<=","value":"116","unit":"ug/L","report_only":false,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Zinc, total recoverable","parameter_code":"01094","statistic":"daily maximum","qualifier":"<=","value":"178","unit":"ug/L","report_only":false,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Zinc, total recoverable","parameter_code":"01094","statistic":"quarterly average","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"UPSTREAM MONITORING"},{"outfall":"001","parameter":"Copper, total recoverable","parameter_code":"01119","statistic":"monthly average","qualifier":"<=","value":"9.53","unit":"ug/L","report_only":false,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Copper, total recoverable","parameter_code":"01119","statistic":"daily maximum","qualifier":"<=","value":"13.92","unit":"ug/L","report_only":false,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Copper, total recoverable","parameter_code":"01119","statistic":"quarterly average","qualifier":null,"value":null,"unit":"ug/L","report_only":true,"enforceable":true,"months":"all","limit_set":"UPSTREAM MONITORING"},{"outfall":"001","parameter":"Chlorine, total residual","parameter_code":"50060","statistic":"monthly average","qualifier":"<=","value":".1","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Chlorine, total residual","parameter_code":"50060","statistic":"daily maximum","qualifier":"<=","value":".1","unit":"mg/L","report_only":false,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Solids, total dissolved","parameter_code":"70295","statistic":"30-day average","qualifier":null,"value":null,"unit":"mg/L","report_only":true,"enforceable":true,"months":"all","limit_set":"PLANT EFFLUENT"},{"outfall":"001","parameter":"Report due [yrmoda]","parameter_code":"85539","statistic":"value","qualifier":"<=","value":"1","unit":"abst=0;prst=1","report_only":false,"enforceable":true,"months":"all","limit_set":"REPORT DUE -ACTIONS TAKEN TO MEET FINAL COPPER EFFLUENT LIMITS"},{"outfall":"001","parameter":"Pass/Fail Static 48Hr Acute Ceriodaphnia dubia","parameter_code":"TGA3B","statistic":"value","qualifier":"<=","value":"0","unit":"pass=0;fail=1","report_only":false,"enforceable":true,"months":"all","limit_set":"QUARTERLY WET MONITORING"},{"outfall":"001","parameter":"Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas","parameter_code":"TGN6C","statistic":"value","qualifier":"<=","value":"0","unit":"pass=0;fail=1","report_only":false,"enforceable":true,"months":"all","limit_set":"QUARTERLY WET MONITORING"}],"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":"MT","sic":"4911"},"needs":{},"get":"https://passage-data.com/api/v1/permits?state=MT&sic=4911","url":"https://passage-data.com/api/v1/permits?state=MT&sic=4911","page":"https://passage-data.com/dmr/s/MT/4911"},{"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":"copper","place":"US-MT","medium":"surface_water"},"needs":{},"get":"https://passage-data.com/api/v1/limits?parameter=copper&place=US-MT&medium=surface_water","url":"https://passage-data.com/api/v1/limits?parameter=copper&place=US-MT&medium=surface_water","page":"https://passage-data.com/limits/US-MT/copper"},{"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":"MT0030180"},"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=MT0030180"},{"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":"MT0030180"},"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=MT0030180"}]}