Minot Air Force Base — NPDES permit ND0020486: limits, due date and EPA's record

NPDES permit ND0020486 · Major FEDERAL · effective, expires 2029-12-31 · EPA's file as of 2026-09-19

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

Last period with anything received: 2026-06-30. Most often over: pH (2), E. coli (1), Solids, total suspended (1).

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 (243)

Outfall	Parameter	Statistic	Limit	Months
001	Temperature, water deg. centigrade	DAILY MN	report only	all year
001	Temperature, water deg. centigrade	MO AVG	report only	all year
001	Temperature, water deg. centigrade	DAILY MX	report only	all year
001	BOD, 5-day, 20 deg. C	MO AVG	<= 25 mg/L	all year
001	BOD, 5-day, 20 deg. C	WKLY AVG	<= 45 mg/L	all year
001	pH	MINIMUM	>= 6 SU	all year
001	pH	MAXIMUM	<= 9 SU	all year
001	Solids, total suspended	MO AVG	<= 30 mg/L	all year
001	Solids, total suspended	WKLY AVG	<= 45 mg/L	all year
001	Oil & Grease	DAILY MX	<= 10 mg/L	all year
001	Nitrogen, total [as N]	DAILY MN	report only	all year
001	Nitrogen, total [as N]	MO AVG	report only	all year
001	Nitrogen, total [as N]	DAILY MX	report only	all year
001	Nitrogen, ammonia total [as N]	WKLY AVG	report only	all year
001	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
001	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
001	Phosphorus, total [as P]	DAILY MN	report only	all year
001	Phosphorus, total [as P]	MO AVG	report only	all year
001	Phosphorus, total [as P]	DAILY MX	report only	all year
001	Phosphorus, total [as P]	MO AVG	report only	all year
001	Phosphorus, total [as P]	DAILY MX	report only	all year
001	Cyanide, total [as CN]	DAILY MN	report only	all year
001	Cyanide, total [as CN]	DAILY AV	report only	all year
001	Cyanide, total [as CN]	DAILY MX	report only	all year
001	Hardness, total [as CaCO3]	DAILY MN	report only	all year
001	Hardness, total [as CaCO3]	DAILY AV	report only	all year
001	Hardness, total [as CaCO3]	DAILY MX	report only	all year
001	Hardness, total [as CaCO3]	DAILY MN	report only	all year
001	Hardness, total [as CaCO3]	DAILY AV	report only	all year
001	Hardness, total [as CaCO3]	DAILY MX	report only	all year
001	Arsenic, total [as As]	DAILY MN	report only	all year
001	Arsenic, total [as As]	DAILY AV	report only	all year
001	Arsenic, total [as As]	DAILY MX	report only	all year
001	Beryllium, total [as Be]	DAILY MN	report only	all year
001	Beryllium, total [as Be]	DAILY AV	report only	all year
001	Beryllium, total [as Be]	DAILY MX	report only	all year
001	Cadmium, total [as Cd]	DAILY MN	report only	all year
001	Cadmium, total [as Cd]	DAILY AV	report only	all year
001	Cadmium, total [as Cd]	DAILY MX	report only	all year
001	Chromium, total [as Cr]	DAILY MN	report only	all year
001	Chromium, total [as Cr]	DAILY AV	report only	all year
001	Chromium, total [as Cr]	DAILY MX	report only	all year
001	Copper, total [as Cu]	DAILY MN	report only	all year
001	Copper, total [as Cu]	DAILY AV	report only	all year
001	Copper, total [as Cu]	DAILY MX	report only	all year
001	Lead, total [as Pb]	DAILY MN	report only	all year
001	Lead, total [as Pb]	DAILY AV	report only	all year
001	Lead, total [as Pb]	DAILY MX	report only	all year
001	Thallium, total [as Tl]	DAILY MN	report only	all year
001	Thallium, total [as Tl]	DAILY AV	report only	all year
001	Thallium, total [as Tl]	DAILY MX	report only	all year
001	Nickel, total [as Ni]	DAILY MN	report only	all year
001	Nickel, total [as Ni]	DAILY AV	report only	all year
001	Nickel, total [as Ni]	DAILY MX	report only	all year
001	Silver, total [as Ag]	DAILY MN	report only	all year
001	Silver, total [as Ag]	DAILY AV	report only	all year
001	Silver, total [as Ag]	DAILY MX	report only	all year
001	Zinc, total [as Zn]	DAILY MN	report only	all year
001	Zinc, total [as Zn]	DAILY AV	report only	all year
001	Zinc, total [as Zn]	DAILY MX	report only	all year
001	Antimony, total [as Sb]	DAILY MN	report only	all year
001	Antimony, total [as Sb]	DAILY AV	report only	all year
001	Antimony, total [as Sb]	DAILY MX	report only	all year
001	Selenium, total [as Se]	DAILY MN	report only	all year
001	Selenium, total [as Se]	DAILY AV	report only	all year
001	Selenium, total [as Se]	DAILY MX	report only	all year
001	Total phenols	DAILY MN	report only	all year
001	Total phenols	DAILY AV	report only	all year
001	Total phenols	DAILY MX	report only	all year
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
001	E. coli	DAILY MN	report only	all year
001	E. coli	30DAVGEO	<= 126 #/100mL	all year
001	E. coli	DAILY MX	<= 409 #/100mL	all year
001	Mercury, total [as Hg]	DAILY MN	report only	all year
001	Mercury, total [as Hg]	DAILY AV	report only	all year
001	Mercury, total [as Hg]	DAILY MX	report only	all year
001	Flow, total	MO TOTAL	report only	all year
001	Oil and grease visual	TOTAL	report only	all year
001	Toxic Units Static Renewal 48Hr Acute Ceriodaphnia dubia	M0	<= 1 tox acute	all year
001	TU Static Renewal 96Hr Acute Pimphales promelas	M0	<= 1 tox acute	all year
003	Temperature, water deg. centigrade	DAILY MN	report only	all year
003	Temperature, water deg. centigrade	MO AVG	report only	all year
003	Temperature, water deg. centigrade	DAILY MX	report only	all year
003	BOD, 5-day, 20 deg. C	MO AVG	<= 25 mg/L	all year
003	BOD, 5-day, 20 deg. C	WKLY AVG	<= 45 mg/L	all year
003	pH	MINIMUM	>= 6 SU	all year
003	pH	MAXIMUM	<= 9 SU	all year
003	Solids, total suspended	MO AVG	<= 30 mg/L	all year
003	Solids, total suspended	WKLY AVG	<= 45 mg/L	all year
003	Oil & Grease	DAILY MX	<= 10 mg/L	all year
003	Nitrogen, total [as N]	DAILY MN	report only	all year
003	Nitrogen, total [as N]	MO AVG	report only	all year
003	Nitrogen, total [as N]	DAILY MX	report only	all year
003	Nitrogen, ammonia total [as N]	WKLY AVG	report only	all year
003	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
003	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
003	Phosphorus, total [as P]	DAILY MN	report only	all year
003	Phosphorus, total [as P]	MO AVG	report only	all year
003	Phosphorus, total [as P]	DAILY MX	report only	all year
003	Phosphorus, total [as P]	MO AVG	report only	all year
003	Phosphorus, total [as P]	DAILY MX	report only	all year
003	Cyanide, total [as CN]	DAILY MN	report only	all year
003	Cyanide, total [as CN]	DAILY AV	report only	all year
003	Cyanide, total [as CN]	DAILY MX	report only	all year
003	Hardness, total [as CaCO3]	DAILY MN	report only	all year
003	Hardness, total [as CaCO3]	DAILY AV	report only	all year
003	Hardness, total [as CaCO3]	DAILY MX	report only	all year
003	Hardness, total [as CaCO3]	DAILY MN	report only	all year
003	Hardness, total [as CaCO3]	DAILY AV	report only	all year
003	Hardness, total [as CaCO3]	DAILY MX	report only	all year
003	Arsenic, total [as As]	DAILY MN	report only	all year
003	Arsenic, total [as As]	DAILY AV	report only	all year
003	Arsenic, total [as As]	DAILY MX	report only	all year
003	Beryllium, total [as Be]	DAILY MN	report only	all year
003	Beryllium, total [as Be]	DAILY AV	report only	all year
003	Beryllium, total [as Be]	DAILY MX	report only	all year
003	Cadmium, total [as Cd]	DAILY MN	report only	all year
003	Cadmium, total [as Cd]	DAILY AV	report only	all year
003	Cadmium, total [as Cd]	DAILY MX	report only	all year
003	Chromium, total [as Cr]	DAILY MN	report only	all year
003	Chromium, total [as Cr]	DAILY AV	report only	all year
003	Chromium, total [as Cr]	DAILY MX	report only	all year
003	Copper, total [as Cu]	DAILY MN	report only	all year
003	Copper, total [as Cu]	DAILY AV	report only	all year
003	Copper, total [as Cu]	DAILY MX	report only	all year
003	Lead, total [as Pb]	DAILY MN	report only	all year
003	Lead, total [as Pb]	DAILY AV	report only	all year
003	Lead, total [as Pb]	DAILY MX	report only	all year
003	Thallium, total [as Tl]	DAILY MN	report only	all year
003	Thallium, total [as Tl]	DAILY AV	report only	all year
003	Thallium, total [as Tl]	DAILY MX	report only	all year
003	Nickel, total [as Ni]	DAILY MN	report only	all year
003	Nickel, total [as Ni]	DAILY AV	report only	all year
003	Nickel, total [as Ni]	DAILY MX	report only	all year
003	Silver, total [as Ag]	DAILY MN	report only	all year
003	Silver, total [as Ag]	DAILY AV	report only	all year
003	Silver, total [as Ag]	DAILY MX	report only	all year
003	Zinc, total [as Zn]	DAILY MN	report only	all year
003	Zinc, total [as Zn]	DAILY AV	report only	all year
003	Zinc, total [as Zn]	DAILY MX	report only	all year
003	Antimony, total [as Sb]	DAILY MN	report only	all year
003	Antimony, total [as Sb]	DAILY AV	report only	all year
003	Antimony, total [as Sb]	DAILY MX	report only	all year
003	Selenium, total [as Se]	DAILY MN	report only	all year
003	Selenium, total [as Se]	DAILY AV	report only	all year
003	Selenium, total [as Se]	DAILY MX	report only	all year
003	Total phenols	DAILY MN	report only	all year
003	Total phenols	DAILY AV	report only	all year
003	Total phenols	DAILY MX	report only	all year
003	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
003	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
003	E. coli	DAILY MN	report only	all year
003	E. coli	30DAVGEO	<= 126 #/100mL	all year
003	E. coli	DAILY MX	<= 409 #/100mL	all year
003	Mercury, total [as Hg]	DAILY MN	report only	all year
003	Mercury, total [as Hg]	DAILY AV	report only	all year
003	Mercury, total [as Hg]	DAILY MX	report only	all year
003	Flow, total	MO TOTAL	report only	all year
003	Oil and grease visual	TOTAL	report only	all year
003	Toxic Units Static Renewal 48Hr Acute Ceriodaphnia dubia	M0	<= 1 tox acute	all year
003	TU Static Renewal 96Hr Acute Pimphales promelas	M0	<= 1 tox acute	all year
011	Temperature, water deg. centigrade	DAILY MN	report only	all year
011	Temperature, water deg. centigrade	MO AVG	report only	all year
011	Temperature, water deg. centigrade	DAILY MX	report only	all year
011	BOD, 5-day, 20 deg. C	MO AVG	<= 25 mg/L	all year
011	BOD, 5-day, 20 deg. C	WKLY AVG	<= 45 mg/L	all year
011	pH	MINIMUM	>= 6 SU	all year
011	pH	MAXIMUM	<= 9 SU	all year
011	Solids, total suspended	MO AVG	<= 30 mg/L	all year
011	Solids, total suspended	WKLY AVG	<= 45 mg/L	all year
011	Oil & Grease	DAILY MX	<= 10 mg/L	all year
011	Nitrogen, total [as N]	DAILY MN	report only (alert)	all year
011	Nitrogen, total [as N]	MO AVG	report only (alert)	all year
011	Nitrogen, total [as N]	DAILY MX	report only (alert)	all year
011	Nitrogen, ammonia total [as N]	WKLY AVG	report only	all year
011	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
011	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
011	Phosphorus, total [as P]	DAILY MN	report only	all year
011	Phosphorus, total [as P]	MO AVG	report only	all year
011	Phosphorus, total [as P]	DAILY MX	report only	all year
011	Phosphorus, total [as P]	MO AVG	report only	all year
011	Phosphorus, total [as P]	DAILY MX	report only	all year
011	Cyanide, total [as CN]	DAILY MN	report only	all year
011	Cyanide, total [as CN]	DAILY AV	report only	all year
011	Cyanide, total [as CN]	DAILY MX	report only	all year
011	Hardness, total [as CaCO3]	DAILY MN	report only	all year
011	Hardness, total [as CaCO3]	DAILY AV	report only	all year
011	Hardness, total [as CaCO3]	DAILY MX	report only	all year
011	Hardness, total [as CaCO3]	DAILY MN	report only	all year
011	Hardness, total [as CaCO3]	DAILY AV	report only	all year
011	Hardness, total [as CaCO3]	DAILY MX	report only	all year
011	Arsenic, total [as As]	DAILY MN	report only	all year
011	Arsenic, total [as As]	DAILY AV	report only	all year
011	Arsenic, total [as As]	DAILY MX	report only	all year
011	Beryllium, total [as Be]	DAILY MN	report only	all year
011	Beryllium, total [as Be]	DAILY AV	report only	all year
011	Beryllium, total [as Be]	DAILY MX	report only	all year
011	Cadmium, total [as Cd]	DAILY MN	report only	all year
011	Cadmium, total [as Cd]	DAILY AV	report only	all year
011	Cadmium, total [as Cd]	DAILY MX	report only	all year
011	Chromium, total [as Cr]	DAILY MN	report only	all year
011	Chromium, total [as Cr]	DAILY AV	report only	all year
011	Chromium, total [as Cr]	DAILY MX	report only	all year
011	Copper, total [as Cu]	DAILY MN	report only	all year
011	Copper, total [as Cu]	DAILY AV	report only	all year
011	Copper, total [as Cu]	DAILY MX	report only	all year
011	Lead, total [as Pb]	DAILY MN	report only	all year
011	Lead, total [as Pb]	DAILY AV	report only	all year
011	Lead, total [as Pb]	DAILY MX	report only	all year
011	Thallium, total [as Tl]	DAILY MN	report only	all year
011	Thallium, total [as Tl]	DAILY AV	report only	all year
011	Thallium, total [as Tl]	DAILY MX	report only	all year
011	Nickel, total [as Ni]	DAILY MN	report only	all year
011	Nickel, total [as Ni]	DAILY AV	report only	all year
011	Nickel, total [as Ni]	DAILY MX	report only	all year
011	Silver, total [as Ag]	DAILY MN	report only	all year
011	Silver, total [as Ag]	DAILY AV	report only	all year
011	Silver, total [as Ag]	DAILY MX	report only	all year
011	Zinc, total [as Zn]	DAILY MN	report only	all year
011	Zinc, total [as Zn]	DAILY AV	report only	all year
011	Zinc, total [as Zn]	DAILY MX	report only	all year
011	Antimony, total [as Sb]	DAILY MN	report only	all year
011	Antimony, total [as Sb]	DAILY AV	report only	all year
011	Antimony, total [as Sb]	DAILY MX	report only	all year
011	Selenium, total [as Se]	DAILY MN	report only	all year
011	Selenium, total [as Se]	DAILY AV	report only	all year
011	Selenium, total [as Se]	DAILY MX	report only	all year
011	Total phenols	DAILY MN	report only	all year
011	Total phenols	DAILY AV	report only	all year
011	Total phenols	DAILY MX	report only	all year
011	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
011	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
011	E. coli	DAILY MN	report only	all year
011	E. coli	30DAVGEO	<= 126 #/100mL	all year
011	E. coli	DAILY MX	<= 409 #/100mL	all year
011	Mercury, total [as Hg]	DAILY MN	report only	all year
011	Mercury, total [as Hg]	DAILY AV	report only	all year
011	Mercury, total [as Hg]	DAILY MX	report only	all year
011	Flow, total	MO TOTAL	report only	all year
011	Oil and grease visual	TOTAL	report only	all year
011	Toxic Units Static Renewal 48Hr Acute Ceriodaphnia dubia	M0	<= 1 tox acute	all year
011	TU Static Renewal 96Hr Acute Pimphales promelas	M0	<= 1 tox acute	all year