Garrison Power Plant

NPDES permit ND0020605 · Minor FEDERAL · effective, expires 2029-03-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

0values over a limit
0required values missing, on 0 form(s)
0of 47 forms filed late

Last period with anything received: 2026-03-31.

Reporting

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

Limits in force (74)

OutfallParameterStatisticLimitMonths
001Compliance With Best Management PracticesTOTAL report only all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY MN report only all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedDAILY MX <= 100 mg/L all year
002Oil & GreaseDAILY MX <= 10 mg/L all year
002Oil and grease visualTOTAL report only all year
003pHMINIMUM >= 6.5 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspendedDAILY MN report only all year
003Solids, total suspendedMO AVG <= 30 mg/L all year
003Solids, total suspendedDAILY MX <= 100 mg/L all year
003Oil & GreaseDAILY MX <= 10 mg/L all year
003Oil and grease visualTOTAL report only all year
004Temperature, water deg. fahrenheitDAILY MN report only all year
004Temperature, water deg. fahrenheitMO AVG report only all year
004Temperature, water deg. fahrenheitDAILY MX report only all year
004Oil & GreaseDAILY MX <= 10 mg/L all year
004Oil and grease visualTOTAL report only all year
005Compliance With Best Management PracticesTOTAL report only all year
006Compliance With Best Management PracticesTOTAL report only all year
007Compliance With Best Management PracticesTOTAL report only all year
008Compliance With Best Management PracticesTOTAL report only all year
009Temperature, water deg. centigradeMINIMUM report only all year
009Temperature, water deg. centigradeMAXIMUM report only all year
009Stream flow, instantaneousMINIMUM report only all year
009Stream flow, instantaneousAVERAGE report only all year
009Stream flow, instantaneousMAXIMUM report only all year
009BOD, 5-day, 20 deg. CDAILY MN report only all year
009BOD, 5-day, 20 deg. CMO AVG <= 25 mg/L all year
009BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
009pHMINIMUM >= 6.5 SU all year
009pHMAXIMUM <= 9 SU all year
009pHMINIMUM report only all year
009pHMAXIMUM report only all year
009Solids, total suspendedDAILY MN report only all year
009Solids, total suspendedMO AVG <= 30 mg/L all year
009Solids, total suspendedDAILY MX <= 45 mg/L all year
009Nitrogen, ammonia total [as N]DAILY MN report only all year
009Nitrogen, ammonia total [as N]MO AVG report only all year
009Nitrogen, ammonia total [as N]DAILY MX report only all year
009Nitrogen, ammonia total [as N]MINIMUM report only all year
009Nitrogen, ammonia total [as N]MAXIMUM report only all year
009Flow, in conduit or thru treatment plantMO AVG report only all year
009E. coliDAILY MN report only all year
009E. coliMOAV GEO <= 126 #/100mL all year
009E. coliDAILY MX <= 409 #/100mL all year
009Flow, totalST report only all year
010Temperature, water deg. centigradeMINIMUM report only all year
010Temperature, water deg. centigradeMAXIMUM report only all year
010Stream flow, instantaneousMINIMUM report only all year
010Stream flow, instantaneousAVERAGE report only all year
010Stream flow, instantaneousMAXIMUM report only all year
010BOD, 5-day, 20 deg. CDAILY MN report only all year
010BOD, 5-day, 20 deg. CMO AVG <= 25 mg/L all year
010BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
010pHMINIMUM >= 6.5 SU all year
010pHMAXIMUM <= 9 SU all year
010pHMINIMUM report only all year
010pHMAXIMUM report only all year
010Solids, total suspendedDAILY MN report only all year
010Solids, total suspendedMO AVG <= 30 mg/L all year
010Solids, total suspendedDAILY MX <= 45 mg/L all year
010Nitrogen, ammonia total [as N]MINIMUM report only all year
010Nitrogen, ammonia total [as N]AVERAGE report only all year
010Nitrogen, ammonia total [as N]MAXIMUM report only all year
010Nitrogen, ammonia total [as N]MINIMUM report only all year
010Nitrogen, ammonia total [as N]MAXIMUM report only all year
010Flow, in conduit or thru treatment plantMO AVG report only all year
010E. coliDAILY MN report only all year
010E. coliMOAV GEO <= 126 #/100mL all year
010E. coliDAILY MX <= 409 #/100mL all year
010Flow, totalST report only 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