Mandan City Of

NPDES permit ND0022861 · Major POTW · effective, expires 2026-09-30 · 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 16 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (67)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMO AVG report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001Temperature, water deg. centigradeMO AVG report only all year
001Temperature, water deg. centigradeDAILY MX report only all year
001Stream flow, instantaneousDAILY MX report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 25 mg/L all year
001BOD, 5-day, 20 deg. CMX WK AV <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMINIMUM report only all year
001pHMAXIMUM report only all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedMX WK AV <= 45 mg/L all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedWKLY AVG report only all year
001Oil & GreaseDAILY MX <= 10 mg/L all year
001Nitrogen, total [as N]MO AVG report only (alert) all year
001Nitrogen, total [as N]WKLY AVG report only (alert) all year
001Nitrogen, total [as N]DAILY MX report only (alert) all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Phosphorus, total [as P]MO MAX report only (alert) all year
001Cyanide, total [as CN]DAILY AV report only all year
001Cyanide, total [as CN]DAILY AV report only all year
001Arsenic, total [as As]DAILY AV report only all year
001Arsenic, total [as As]DAILY AV report only all year
001Beryllium, total [as Be]DAILY AV report only all year
001Beryllium, total [as Be]DAILY AV report only all year
001Cadmium, total [as Cd]DAILY AV report only all year
001Cadmium, total [as Cd]DAILY AV report only all year
001Chromium, total [as Cr]DAILY AV report only all year
001Chromium, total [as Cr]DAILY AV report only all year
001Copper, total [as Cu]DAILY AV report only all year
001Copper, total [as Cu]DAILY AV report only all year
001Lead, total [as Pb]DAILY AV report only all year
001Lead, total [as Pb]DAILY AV report only all year
001Thallium, total [as Tl]DAILY AV report only all year
001Thallium, total [as Tl]DAILY AV report only all year
001Nickel, total [as Ni]DAILY AV report only all year
001Nickel, total [as Ni]DAILY AV report only all year
001Silver, total [as Ag]DAILY AV report only all year
001Silver, total [as Ag]DAILY AV report only all year
001Zinc, total [as Zn]DAILY AV report only all year
001Zinc, total [as Zn]DAILY AV report only all year
001Antimony, total [as Sb]DAILY AV report only all year
001Antimony, total [as Sb]DAILY AV report only all year
001Selenium, total [as Se]DAILY AV report only all year
001Selenium, total [as Se]DAILY AV report only all year
001Phenolics, total recoverableDAILY AV report only all year
001Phenolics, total recoverableDAILY AV report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001BOD, percent removal [total]MN VALUE >= 85 % all year
001E. coliMO GEOMN <= 126 #/100mL all year
001E. coliDAILY MX <= 409 #/100mL all year
001Analytical ChemistryVALUE report only all year
001Flow, totalTOTAL report only all year
001Mercury, total [as Hg]DAILY AV report only all year
001Mercury, total [as Hg]DAILY AV report only all year
001Solids, suspended percent removalMN VALUE >= 85 % all year
001Oil and grease visualTOTAL report only all year
001Toxic Units Static Renewal 48Hr Acute Ceriodaphnia dubiaM0 <= 1 tox acute all year
001TU Static Renewal 96Hr Acute Pimphales promelasM0 <= 1 tox acute all year
001TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaM0 report only all year
001TU Static Renewal 7-Day Chronic Pimphales promelasM0 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