City of Defiance — NPDES permit OH0024899: limits, due date and EPA's record

NPDES permit OH0024899 · Major POTW · effective, expires 2029-02-28 · EPA's file as of 2026-09-19

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

Last period with anything received: 2026-07-31. Most often over: Mercury, total low level (3), pH, minimum (2), Oxygen, dissolved [DO] (1).

Reporting

Reports are due about 20 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (292)

Outfall	Parameter	Statistic	Limit	Months
001	Temperature, water deg. centigrade	MO AVG	report only	all year
001	Temperature, water deg. centigrade	DAILY MX	report only	all year
001	Oxygen, dissolved [DO]	DAILY MN	>= 5.3 mg/L	all year
001	Oil and grease, hexane extr method	DAILY MX	<= 10 mg/L	all year
001	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
001	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
001	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
001	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
001	Phosphorus, total [as P]	MO AVG	<= 1 mg/L	all year
001	Phosphorus, total [as P]	WKLY MAX	<= 1.5 mg/L	all year
001	Phosphorus, total [as P]	MO AVG	<= 22.7 kg/d	all year
001	Phosphorus, total [as P]	WKLY MAX	<= 34 kg/d	all year
001	Phosphate, ortho, dissolved [as P]	MO AVG	report only	all year
001	Phosphate, ortho, dissolved [as P]	DAILY MX	report only	all year
001	Nickel, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
001	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
001	Zinc, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
001	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
001	Cadmium, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
001	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
001	Lead, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
001	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
001	Chromium, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
001	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
001	Copper, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
001	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
001	Chromium, hexavalent dissolved [as Cr]	MO AVG	report only	Mar, Jun, Sep, Dec
001	Chromium, hexavalent dissolved [as Cr]	DAILY MX	report only	Mar, Jun, Sep, Dec
001	E. coli, MTEC-MF	MO GEOMN	<= 126 MPN/100mL	May, Jun, Jul, Aug, Sep, Oct
001	E. coli, MTEC-MF	WK GEOMN	<= 284 MPN/100mL	May, Jun, Jul, Aug, Sep, Oct
001	Rainfall	MO AVG	report only	all year
001	Rainfall	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	Mercury, total low level	MO AVG	<= 1.8 ng/L	all year
001	Mercury, total low level	DAILY MX	<= 1700 ng/L	all year
001	Mercury, total low level	MO AVG	<= .000041 kg/d	all year
001	Mercury, total low level	DAILY MX	<= .039 kg/d	all year
001	Cyanide, free available	MO AVG	report only	Mar, Jun, Sep, Dec
001	Cyanide, free available	DAILY MX	report only	Mar, Jun, Sep, Dec
001	Toxicity [acute], Ceriodaphnia dubia	MO AVG	report only	Jun
001	Toxicity [acute], Ceriodaphnia dubia	DAILY MX	report only	Jun
001	Toxicity [chronic], Ceriodaphnia dubia	MO AVG	report only	Jun
001	Toxicity [chronic], Ceriodaphnia dubia	DAILY MX	report only	Jun
001	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MO AVG	report only	Jun
001	Toxicity [acute], Pimephales promelas [Fathead Minnow]	DAILY MX	report only	Jun
001	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MO AVG	report only	Jun
001	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	DAILY MX	report only	Jun
001	pH, maximum	DAILY MX	<= 9 SU	all year
001	pH, minimum	DAILY MN	>= 6.5 SU	all year
001	Solids, total dissolved- 180 deg. C	MO AVG	report only	all year
001	Solids, total dissolved- 180 deg. C	DAILY MX	report only	all year
002	Overflows	MO AVG	report only	all year
002	Overflows	DAILY MX	report only	all year
002	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	all year
002	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	all year
003	Overflows	MO AVG	report only	Dec
003	Overflows	DAILY MX	report only	Dec
003	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
003	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
004	Overflows	MO AVG	report only	Dec
004	Overflows	DAILY MX	report only	Dec
004	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
004	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
005	Overflows	MO AVG	report only	Dec
005	Overflows	DAILY MX	report only	Dec
005	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
005	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
006	Solids, total suspended	MO AVG	report only	all year
006	Solids, total suspended	DAILY MX	report only	all year
006	Overflows	MO AVG	report only	all year
006	Overflows	DAILY MX	report only	all year
006	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	all year
006	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	all year
006	BOD, carbonaceous [5 day, 20 C]	MO AVG	report only	all year
006	BOD, carbonaceous [5 day, 20 C]	DAILY MX	report only	all year
007	Overflows	MO AVG	report only	all year
007	Overflows	DAILY MX	report only	all year
007	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	all year
007	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	all year
010	Overflows	MO AVG	report only	Dec
010	Overflows	DAILY MX	report only	Dec
010	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
010	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
011	Overflows	MO AVG	report only	Dec
011	Overflows	DAILY MX	report only	Dec
011	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
011	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
012	Overflows	MO AVG	report only	Dec
012	Overflows	DAILY MX	report only	Dec
012	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
012	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
013	Overflows	MO AVG	report only	Dec
013	Overflows	DAILY MX	report only	Dec
013	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
013	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
014	Overflows	MO AVG	report only	Dec
014	Overflows	DAILY MX	report only	Dec
014	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
014	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
015	Overflows	MO AVG	report only	Dec
015	Overflows	DAILY MX	report only	Dec
015	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
015	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
016	Overflows	MO AVG	report only	Dec
016	Overflows	DAILY MX	report only	Dec
016	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
016	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
017	Overflows	MO AVG	report only	all year
017	Overflows	DAILY MX	report only	all year
017	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	all year
017	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	all year
018	Overflows	MO AVG	report only	all year
018	Overflows	DAILY MX	report only	all year
018	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	all year
018	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	all year
019	Overflows	MO AVG	report only	Dec
019	Overflows	DAILY MX	report only	Dec
019	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
019	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
020	Overflows	MO AVG	report only	Dec
020	Overflows	DAILY MX	report only	Dec
020	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
020	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
026	Overflows	MO AVG	report only	Dec
026	Overflows	DAILY MX	report only	Dec
026	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
026	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
027	Solids, total suspended	MO AVG	report only	all year
027	Solids, total suspended	DAILY MX	report only	all year
027	Overflows	MO AVG	report only	all year
027	Overflows	DAILY MX	report only	all year
027	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	all year
027	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	all year
027	BOD, carbonaceous [5 day, 20 C]	MO AVG	report only	all year
027	BOD, carbonaceous [5 day, 20 C]	DAILY MX	report only	all year
030	Overflows	MO AVG	report only	Dec
030	Overflows	DAILY MX	report only	Dec
030	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
030	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
032	Overflows	MO AVG	report only	all year
032	Overflows	DAILY MX	report only	all year
032	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	all year
032	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	all year
033	Overflows	MO AVG	report only	all year
033	Overflows	DAILY MX	report only	all year
033	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	all year
033	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	all year
037	Overflows	MO AVG	report only	Dec
037	Overflows	DAILY MX	report only	Dec
037	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
037	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
039	Overflows	MO AVG	report only	Dec
039	Overflows	DAILY MX	report only	Dec
039	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
039	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
041	Overflows	MO AVG	report only	Dec
041	Overflows	DAILY MX	report only	Dec
041	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
041	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
044	Overflows	MO AVG	report only	Dec
044	Overflows	DAILY MX	report only	Dec
044	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
044	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
045	Overflows	MO AVG	report only	Dec
045	Overflows	DAILY MX	report only	Dec
045	Overflow volume [SS0 volume, CSO volume]	MO AVG	report only	Dec
045	Overflow volume [SS0 volume, CSO volume]	DAILY MX	report only	Dec
050	Solids, total suspended	MO AVG	report only	all year
050	Solids, total suspended	DAILY MX	report only	all year
050	Bypass Volume	MO AVG	report only	all year
050	Bypass Volume	DAILY MX	report only	all year
050	BOD, carbonaceous [5 day, 20 C]	MO AVG	report only	all year
050	BOD, carbonaceous [5 day, 20 C]	DAILY MX	report only	all year
050	Bypass valve	MO AVG	report only	all year
050	Bypass valve	DAILY MX	report only	all year
050	Bypass of treatment	MO AVG	report only	all year
050	Bypass of treatment	DAILY MX	report only	all year
300	Overflows	MO AVG	report only	all year
300	Overflows	DAILY MX	report only	all year
581	pH	DAILY MN	report only	all year
581	pH	DAILY MX	report only	all year
581	Nitrogen, ammonia in bottom deposits	MO AVG	report only	Mar, Jun, Sep, Dec
581	Nitrogen, ammonia in bottom deposits	DAILY MX	report only	Mar, Jun, Sep, Dec
581	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	Mar, Jun, Sep, Dec
581	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	Mar, Jun, Sep, Dec
581	Phosphorous, total, in bottom deposits	MO AVG	report only	Mar, Jun, Sep, Dec
581	Phosphorous, total, in bottom deposits	DAILY MX	report only	Mar, Jun, Sep, Dec
581	Potassium, in bottom deposits	MO AVG	report only	Mar, Jun, Sep, Dec
581	Potassium, in bottom deposits	DAILY MX	report only	Mar, Jun, Sep, Dec
581	Arsenic, dry weight	DAILY MX	<= 75 mg/kg	Mar, Jun, Sep, Dec
581	Cadmium, in bottom deposits [dry wgt]	DAILY MX	<= 85 mg/kg	Mar, Jun, Sep, Dec
581	Copper in bottom deposits [dry wgt]	DAILY MX	<= 4300 mg/kg	Mar, Jun, Sep, Dec
581	Lead, total dry weight [as Pb]	DAILY MX	<= 840 mg/kg	Mar, Jun, Sep, Dec
581	Nickel, tot in bottom deposits [dry wgt]	DAILY MX	<= 420 mg/kg	Mar, Jun, Sep, Dec
581	Zinc in bottom deposits [dry wgt]	DAILY MX	<= 7500 mg/kg	Mar, Jun, Sep, Dec
581	Selenium, dry weight	DAILY MX	<= 100 mg/kg	Mar, Jun, Sep, Dec
581	Fecal coliform	DAILY MX	<= 2000000 MPN/g	Mar, Jun, Sep, Dec
581	Biosolids weight indluding admixtures	MO AVG	report only	Mar, Jun, Sep, Dec
581	Biosolids weight indluding admixtures	DAILY MX	report only	Mar, Jun, Sep, Dec
581	Sludge weight, dry	MO AVG	report only	Mar, Jun, Sep, Dec
581	Sludge weight, dry	DAILY MX	report only	Mar, Jun, Sep, Dec
581	Mercury, tot in bot deposits [dry wgt]	DAILY MX	<= 57 mg/kg	Mar, Jun, Sep, Dec
581	Molybdenum, sludge, total, dry weight [as Mo]	DAILY MX	<= 75 mg/kg	Mar, Jun, Sep, Dec
586	Biosolids weight indluding admixtures	MO AVG	report only	Dec
586	Biosolids weight indluding admixtures	DAILY MX	report only	Dec
588	Sludge weight, dry	MO AVG	report only	Dec
588	Sludge weight, dry	DAILY MX	report only	Dec
601	pH	DAILY MN	report only	all year
601	pH	DAILY MX	report only	all year
601	Solids, total suspended	MO AVG	report only	all year
601	Solids, total suspended	DAILY MX	report only	all year
601	Phosphorus, total [as P]	MO AVG	report only	all year
601	Phosphorus, total [as P]	DAILY MX	report only	all year
601	Cyanide, total [as CN]	MO AVG	report only	Mar, Jun, Sep, Dec
601	Cyanide, total [as CN]	DAILY MX	report only	Mar, Jun, Sep, Dec
601	Nickel, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
601	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
601	Zinc, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
601	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
601	Cadmium, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
601	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
601	Lead, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
601	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
601	Chromium, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
601	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
601	Copper, total recoverable	MO AVG	report only	Mar, Jun, Sep, Dec
601	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
601	Chromium, hexavalent dissolved [as Cr]	MO AVG	report only	Mar, Jun, Sep, Dec
601	Chromium, hexavalent dissolved [as Cr]	DAILY MX	report only	Mar, Jun, Sep, Dec
601	Mercury, total low level	MO AVG	report only	all year
601	Mercury, total low level	DAILY MX	report only	all year
601	pH, maximum	DAILY MX	report only	all year
601	pH, minimum	DAILY MN	report only	all year
601	BOD, carbonaceous [5 day, 20 C]	MO AVG	report only	all year
601	BOD, carbonaceous [5 day, 20 C]	DAILY MX	report only	all year
602	Solids, total suspended	MO AVG	<= 24 mg/L	all year
602	Solids, total suspended	WKLY MAX	<= 36 mg/L	all year
602	Solids, total suspended	MO AVG	<= 545 kg/d	all year
602	Solids, total suspended	WKLY MAX	<= 817 kg/d	all year
602	Nitrogen, ammonia total [as N]	MO AVG	<= 5.3 mg/L	May, Jun, Jul, Aug, Sep, Oct
602	Nitrogen, ammonia total [as N]	MO AVG	<= 13 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
602	Nitrogen, ammonia total [as N]	WKLY MAX	<= 8 mg/L	May, Jun, Jul, Aug, Sep, Oct
602	Nitrogen, ammonia total [as N]	WKLY MAX	<= 20 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
602	Nitrogen, ammonia total [as N]	MO AVG	<= 121 kg/d	May, Jun, Jul, Aug, Sep, Oct
602	Nitrogen, ammonia total [as N]	MO AVG	<= 295 kg/d	Jan, Feb, Mar, Apr, Nov, Dec
602	Nitrogen, ammonia total [as N]	WKLY MAX	<= 182 kg/d	May, Jun, Jul, Aug, Sep, Oct
602	Nitrogen, ammonia total [as N]	WKLY MAX	<= 454 kg/d	Jan, Feb, Mar, Apr, Nov, Dec
602	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
602	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
602	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 13 mg/L	May, Jun, Jul, Aug, Sep, Oct
602	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 20 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
602	BOD, carbonaceous [5 day, 20 C]	WKLY MAX	<= 20 mg/L	May, Jun, Jul, Aug, Sep, Oct
602	BOD, carbonaceous [5 day, 20 C]	WKLY MAX	<= 30 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
602	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 295 kg/d	May, Jun, Jul, Aug, Sep, Oct
602	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 454 kg/d	Jan, Feb, Mar, Apr, Nov, Dec
602	BOD, carbonaceous [5 day, 20 C]	WKLY MAX	<= 454 kg/d	May, Jun, Jul, Aug, Sep, Oct
602	BOD, carbonaceous [5 day, 20 C]	WKLY MAX	<= 681 kg/d	Jan, Feb, Mar, Apr, Nov, Dec
801	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
801	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
801	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
801	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
801	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
801	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
801	Phosphorus, total [as P]	MO AVG	report only	all year
801	Phosphorus, total [as P]	DAILY MX	report only	all year
801	E. coli, MTEC-MF	MO GEOMN	report only	Jun, Jul, Aug
801	E. coli, MTEC-MF	DAILY MX	report only	Jun, Jul, Aug
801	%Effect Static Renewal 48Hr Acute Ceriodaphnia dubia	MO AVG	report only	Jun
801	%Effect Static Renewal 48Hr Acute Ceriodaphnia dubia	DAILY MX	report only	Jun
801	%Effect Static Renewal 96Hr Acute Pimephales promelas	MO AVG	report only	Jun
801	%Effect Static Renewal 96Hr Acute Pimephales promelas	DAILY MX	report only	Jun
801	%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia	MO AVG	report only	Jun
801	%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia	DAILY MX	report only	Jun
801	%Effect Static Renewal 7Day Chronic Pimephales promelas	MO AVG	report only	Jun
801	%Effect Static Renewal 7Day Chronic Pimephales promelas	DAILY MX	report only	Jun
901	Temperature, water deg. centigrade	MO AVG	report only	all year
901	Temperature, water deg. centigrade	DAILY MX	report only	all year
901	pH	DAILY MN	report only	all year
901	pH	DAILY MX	report only	all year
901	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
901	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
901	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
901	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
901	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
901	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
901	Phosphorus, total [as P]	MO AVG	report only	all year
901	Phosphorus, total [as P]	DAILY MX	report only	all year
901	Hardness, total [as CaCO3]	MO AVG	report only	all year
901	Hardness, total [as CaCO3]	DAILY MX	report only	all year
901	E. coli, MTEC-MF	MO GEOMN	report only	Jun, Jul, Aug
901	E. coli, MTEC-MF	DAILY MX	report only	Jun, Jul, Aug