City of Watford City — NPDES permit ND0021849: limits, due date and EPA's record

NPDES permit ND0021849 · Minor POTW · effective, expires 2030-09-30 · EPA's file as of 2026-09-19

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

Reporting

Reports are due about 30 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (161)

Outfall	Parameter	Statistic	Limit	Months
001	Temperature, water deg. centigrade	DAILY MX	report only	all year
001	BOD, 5-day, 20 deg. C	DAILY MN	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	<= 35 mg/L	all year
001	pH	MINIMUM	>= 6 SU	all year
001	pH	MAXIMUM	<= 9 SU	all year
001	Solids, total suspended	DAILY MN	report only	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]	MO AVG	report only	all year
001	Nitrogen, total [as N]	WKLY AVG	report only	all year
001	Nitrogen, total [as N]	DAILY MX	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]	MO AVG	report only	all year
001	Phosphorus, total [as P]	WKLY AVG	report only	all year
001	Phosphorus, total [as P]	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	Chlorine, total residual	MO AVG	<= .011 mg/L	all year
001	Chlorine, total residual	DAILY MX	<= .019 mg/L	all year
001	E. coli	DAILY MN	report only	all year
001	E. coli	MO AVG	<= 126 #/100mL	all year
001	E. coli	DAILY MX	<= 409 #/100mL	all year
001	Flow, total	MO TOTAL	report only	all year
001	Duration of discharge	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
002	Temperature, water deg. centigrade	MO AVG	report only	all year
002	Temperature, water deg. centigrade	DAILY MX	report only	all year
002	Oxygen, dissolved [DO]	DAILY MN	>= 5 mg/L	all year
002	BOD, 5-day, 20 deg. C	MO AVG	<= 25 mg/L	all year
002	BOD, 5-day, 20 deg. C	WKLY AVG	<= 35 mg/L	all year
002	BOD, 5-day, 20 deg. C	MO AVG	report only	all year
002	BOD, 5-day, 20 deg. C	DAILY MX	report only	all year
002	pH	MINIMUM	>= 6 SU	all year
002	pH	MAXIMUM	<= 9 SU	all year
002	Solids, total suspended	MO AVG	<= 30 mg/L	all year
002	Solids, total suspended	WKLY AVG	<= 45 mg/L	all year
002	Solids, total suspended	MO AVG	report only	all year
002	Solids, total suspended	DAILY MX	report only	all year
002	Oil & Grease	DAILY MX	<= 10 mg/L	all year
002	Nitrogen, total [as N]	MO AVG	report only	all year
002	Nitrogen, total [as N]	WKLY AVG	report only	all year
002	Nitrogen, total [as N]	DAILY MX	report only	all year
002	Nitrogen, ammonia total [as N]	WKLY AVG	report only	all year
002	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
002	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
002	Phosphorus, total [as P]	MO AVG	report only	all year
002	Phosphorus, total [as P]	WKLY AVG	report only	all year
002	Phosphorus, total [as P]	DAILY MX	report only	all year
002	Cyanide, total [as CN]	DAILY MN	report only	all year
002	Cyanide, total [as CN]	DAILY AV	report only	all year
002	Cyanide, total [as CN]	DAILY MX	report only	all year
002	Cyanide, total [as CN]	DAILY MN	report only	all year
002	Cyanide, total [as CN]	DAILY AV	report only	all year
002	Cyanide, total [as CN]	DAILY MX	report only	all year
002	Hardness, total [as CaCO3]	DAILY MN	report only	all year
002	Hardness, total [as CaCO3]	DAILY AV	report only	all year
002	Hardness, total [as CaCO3]	DAILY MX	report only	all year
002	Arsenic, total [as As]	DAILY MN	report only	all year
002	Arsenic, total [as As]	DAILY AV	report only	all year
002	Arsenic, total [as As]	DAILY MX	report only	all year
002	Arsenic, total [as As]	DAILY MN	report only	all year
002	Arsenic, total [as As]	DAILY AV	report only	all year
002	Arsenic, total [as As]	DAILY MX	report only	all year
002	Beryllium, total [as Be]	DAILY MN	report only	all year
002	Beryllium, total [as Be]	DAILY AV	report only	all year
002	Beryllium, total [as Be]	DAILY MX	report only	all year
002	Beryllium, total [as Be]	DAILY MN	report only	all year
002	Beryllium, total [as Be]	DAILY AV	report only	all year
002	Beryllium, total [as Be]	DAILY MX	report only	all year
002	Cadmium, total [as Cd]	DAILY MN	report only	all year
002	Cadmium, total [as Cd]	DAILY AV	report only	all year
002	Cadmium, total [as Cd]	DAILY MX	report only	all year
002	Cadmium, total [as Cd]	DAILY MN	report only	all year
002	Cadmium, total [as Cd]	DAILY AV	report only	all year
002	Cadmium, total [as Cd]	DAILY MX	report only	all year
002	Chromium, total [as Cr]	DAILY MN	report only	all year
002	Chromium, total [as Cr]	DAILY AV	report only	all year
002	Chromium, total [as Cr]	DAILY MX	report only	all year
002	Chromium, total [as Cr]	DAILY MN	report only	all year
002	Chromium, total [as Cr]	DAILY AV	report only	all year
002	Chromium, total [as Cr]	DAILY MX	report only	all year
002	Copper, total [as Cu]	DAILY MN	report only	all year
002	Copper, total [as Cu]	DAILY AV	report only	all year
002	Copper, total [as Cu]	DAILY MX	report only	all year
002	Copper, total [as Cu]	DAILY MN	report only	all year
002	Copper, total [as Cu]	DAILY AV	report only	all year
002	Copper, total [as Cu]	DAILY MX	report only	all year
002	Lead, total [as Pb]	DAILY MN	report only	all year
002	Lead, total [as Pb]	DAILY AV	report only	all year
002	Lead, total [as Pb]	DAILY MX	report only	all year
002	Lead, total [as Pb]	DAILY MN	report only	all year
002	Lead, total [as Pb]	DAILY AV	report only	all year
002	Lead, total [as Pb]	DAILY MX	report only	all year
002	Thallium, total [as Tl]	DAILY MN	report only	all year
002	Thallium, total [as Tl]	DAILY AV	report only	all year
002	Thallium, total [as Tl]	DAILY MX	report only	all year
002	Thallium, total [as Tl]	DAILY MN	report only	all year
002	Thallium, total [as Tl]	DAILY AV	report only	all year
002	Thallium, total [as Tl]	DAILY MX	report only	all year
002	Nickel, total [as Ni]	DAILY MN	report only	all year
002	Nickel, total [as Ni]	DAILY AV	report only	all year
002	Nickel, total [as Ni]	DAILY MX	report only	all year
002	Nickel, total [as Ni]	DAILY MN	report only	all year
002	Nickel, total [as Ni]	DAILY AV	report only	all year
002	Nickel, total [as Ni]	DAILY MX	report only	all year
002	Silver, total [as Ag]	DAILY MN	report only	all year
002	Silver, total [as Ag]	DAILY AV	report only	all year
002	Silver, total [as Ag]	DAILY MX	report only	all year
002	Silver, total [as Ag]	DAILY MN	report only	all year
002	Silver, total [as Ag]	DAILY AV	report only	all year
002	Silver, total [as Ag]	DAILY MX	report only	all year
002	Zinc, total [as Zn]	DAILY MN	report only	all year
002	Zinc, total [as Zn]	DAILY AV	report only	all year
002	Zinc, total [as Zn]	DAILY MX	report only	all year
002	Zinc, total [as Zn]	DAILY MN	report only	all year
002	Zinc, total [as Zn]	DAILY AV	report only	all year
002	Zinc, total [as Zn]	DAILY MX	report only	all year
002	Antimony, total [as Sb]	DAILY MN	report only	all year
002	Antimony, total [as Sb]	DAILY AV	report only	all year
002	Antimony, total [as Sb]	DAILY MX	report only	all year
002	Antimony, total [as Sb]	DAILY MN	report only	all year
002	Antimony, total [as Sb]	DAILY AV	report only	all year
002	Antimony, total [as Sb]	DAILY MX	report only	all year
002	Selenium, total [as Se]	DAILY MN	report only	all year
002	Selenium, total [as Se]	DAILY AV	report only	all year
002	Selenium, total [as Se]	DAILY MX	report only	all year
002	Selenium, total [as Se]	DAILY MN	report only	all year
002	Selenium, total [as Se]	DAILY AV	report only	all year
002	Selenium, total [as Se]	DAILY MX	report only	all year
002	Total phenols	DAILY MN	report only	all year
002	Total phenols	DAILY AV	report only	all year
002	Total phenols	DAILY MX	report only	all year
002	Total phenols	DAILY MN	report only	all year
002	Total phenols	DAILY AV	report only	all year
002	Total phenols	DAILY MX	report only	all year
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Chlorine, total residual	MO AVG	<= .011 mg/L	all year
002	Chlorine, total residual	DAILY MX	<= .019 mg/L	all year
002	BOD, percent removal [total]	MN VALUE	>= 85 %	all year
002	E. coli	MO AVG	<= 126 #/100mL	all year
002	E. coli	DAILY MX	<= 409 #/100mL	all year
002	Flow, total	TOTAL	report only	all year
002	Mercury, total [as Hg]	DAILY MN	report only	all year
002	Mercury, total [as Hg]	DAILY AV	report only	all year
002	Mercury, total [as Hg]	DAILY MX	report only	all year
002	Mercury, total [as Hg]	DAILY MN	report only	all year
002	Mercury, total [as Hg]	DAILY AV	report only	all year
002	Mercury, total [as Hg]	DAILY MX	report only	all year
002	Solids, suspended percent removal	MN VALUE	>= 85 %	all year
002	Duration of discharge	TOTAL	report only	all year
002	Oil and grease visual	TOTAL	report only	all year
002	Toxic Units Static Renewal 48Hr Acute Ceriodaphnia dubia	M0	<= 1 tox acute	all year
002	TU Static Renewal 96Hr Acute Pimphales promelas	M0	<= 1 tox acute	all year
002	TU Static Renewal 7-Day Chronic Ceriodaphnia dubia	M0	report only	all year
002	TU Static Renewal 7-Day Chronic Pimphales promelas	M0	report only	all year