YELLOWSTONE ENERGY LIMITED PARTNERSHIP

NPDES permit MT0030180 · Minor NON-POTW · administratively continued, expires 2019-04-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2019-04-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

20values over a limit
0required values missing, on 0 form(s)
0of 24 forms filed late

Last period with anything received: 2026-07-31. Most often over: Copper, total recoverable (20).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MT permits in EPA's filings — check your permit).

Limits in force (25)

OutfallParameterStatisticLimitMonths
001Flow rate30DA AVG report only all year
001Flow rateDAILY MX report only all year
001Flow rateQRTR AVG report only all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001pHQRTR AVG report only all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 100 mg/L all year
001Oil and grease, hexane extr methodMO AVG report only all year
001Oil and grease, hexane extr methodDAILY MX <= 10 mg/L all year
001Phosphorus, total [as P]QRTR AVG report only all year
001Phosphorus, total [as P]QRTR AVG report only all year
001Hardness, total [as CaCO3]QRTR AVG report only all year
001Zinc, total recoverableMO AVG <= 116 ug/L all year
001Zinc, total recoverableDAILY MX <= 178 ug/L all year
001Zinc, total recoverableQRTR AVG report only all year
001Copper, total recoverableMO AVG <= 9.53 ug/L all year
001Copper, total recoverableDAILY MX <= 13.92 ug/L all year
001Copper, total recoverableQRTR AVG report only all year
001Chlorine, total residualMO AVG <= .1 mg/L all year
001Chlorine, total residualDAILY MX <= .1 mg/L all year
001Solids, total dissolved30DA AVG report only all year
001Report due [yrmoda]VALUE <= 1 abst=0;prst=1 all year
001Pass/Fail Static 48Hr Acute Ceriodaphnia dubiaVALUE <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasVALUE <= 0 pass=0;fail=1 all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states