City of Wapakoneta WRF — NPDES permit OH0027952: limits, due date and EPA's record

Sewage treatment plant, major discharger, Wapakoneta, Ohio. NPDES permit OH0027952, in force until Nov 30, 2029. Last 12 months: over a limit 16 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Limits in force (250)

Period ending	Outfall	Parameter	Reported	Limit	Over by
December 2025	001	Toxicity [chronic], Ceriodaphnia dubia, monthly average	1.1	≤ 1 tox chronic	10%
December 2025	020	Solids, total dissolved- 180 deg. C, monthly average	1687	≤ 1561 mg/L	8%
March 2026	001	pH, minimum, daily minimum	6	≥ 6.5 SU	—
March 2026	603	Solids, total suspended, monthly average	28.3	≤ 12 mg/L	136%
March 2026	603	Solids, total suspended, monthly average	504	≤ 273 kg/d	85%
March 2026	603	Solids, total suspended, weekly maximum	43.1	≤ 18 mg/L	139%
March 2026	603	Solids, total suspended, weekly maximum	719	≤ 409 kg/d	76%
May 2026	001	Mercury, total low level, monthly average	.0000476	≤ .00003 kg/d	59%
May 2026	001	Mercury, total low level, monthly average	1.32	≤ 1.3 ng/L	2%
June 2026	001	Toxicity [chronic], Pimephales promelas [Fathead Minnow], monthly average	1.6	≤ 1 tox chronic	60%
June 2026	603	BOD, carbonaceous [5 day, 20 C], weekly maximum	15.4	≤ 15 mg/L	3%
August 2026	001	Toxicity [chronic], Ceriodaphnia dubia, monthly average	4.4	≤ 1 tox chronic	340%
August 2026	603	Solids, total suspended, monthly average	12.8	≤ 12 mg/L	7%
August 2026	603	Solids, total suspended, monthly average	298	≤ 273 kg/d	9%
August 2026	603	Solids, total suspended, weekly maximum	20.9	≤ 18 mg/L	16%
August 2026	603	Solids, total suspended, weekly maximum	574	≤ 409 kg/d	40%

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. centigrade	monthly average	report only (deg C)	all year	001
Temperature, water deg. centigrade	daily maximum	report only (deg C)	all year	001
Specific conductance	monthly average	report only (umho/cm)	all year	001
Specific conductance	daily maximum	report only (umho/cm)	all year	001
Oil and grease, hexane extr method	daily maximum	≤ 10 mg/L	all year	001
Nitrogen, ammonia total [as N]	monthly average	report only (mg/L)	all year	001
Nitrogen, ammonia total [as N]	daily maximum	report only (mg/L)	all year	001
Nitrogen, Kjeldahl, total [as N]	monthly average	report only (mg/L)	all year	001
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (mg/L)	all year	001
Nitrite + Nitrate total [as N]	monthly average	report only (mg/L)	all year	001
Nitrite + Nitrate total [as N]	daily maximum	report only (mg/L)	all year	001
Phosphorus, total [as P]	monthly average	≤ 1 mg/L	all year	001
Phosphorus, total [as P]	weekly maximum	≤ 1.5 mg/L	all year	001
Phosphorus, total [as P]	monthly average	≤ 23 kg/d	all year	001
Phosphorus, total [as P]	weekly maximum	≤ 34 kg/d	all year	001
Phosphate, ortho, dissolved [as P]	monthly average	report only (mg/L)	all year	001
Phosphate, ortho, dissolved [as P]	daily maximum	report only (mg/L)	all year	001
Selenium, total recoverable	monthly average	report only (ug/L)	all year	001
Selenium, total recoverable	daily maximum	report only (ug/L)	all year	001
Nickel, total recoverable	monthly average	report only (ug/L)	Mar, Jun, Aug, Dec	001
Nickel, total recoverable	daily maximum	report only (ug/L)	Mar, Jun, Aug, Dec	001
Zinc, total recoverable	monthly average	report only (ug/L)	Mar, Jun, Aug, Dec	001
Zinc, total recoverable	daily maximum	report only (ug/L)	Mar, Jun, Aug, Dec	001
Cadmium, total recoverable	monthly average	report only (ug/L)	all year	001
Cadmium, total recoverable	daily maximum	report only (ug/L)	all year	001
Lead, total recoverable	monthly average	report only (ug/L)	Mar, Jun, Aug, Dec	001
Lead, total recoverable	daily maximum	report only (ug/L)	Mar, Jun, Aug, Dec	001
Chromium, total recoverable	monthly average	report only (ug/L)	Mar, Jun, Aug, Dec	001
Chromium, total recoverable	daily maximum	report only (ug/L)	Mar, Jun, Aug, Dec	001
Copper, total recoverable	monthly average	report only (ug/L)	all year	001
Copper, total recoverable	daily maximum	report only (ug/L)	all year	001
Chromium, hexavalent dissolved [as Cr]	monthly average	report only (ug/L)	Mar, Jun, Aug, Dec	001
Chromium, hexavalent dissolved [as Cr]	daily maximum	report only (ug/L)	Mar, Jun, Aug, Dec	001
E. coli, MTEC-MF	monthly geometric mean	≤ 126 MPN/100mL	May–Oct	001
E. coli, MTEC-MF	weekly geometric mean	≤ 284 MPN/100mL	May–Oct	001
Dichlorobromomethane	monthly average	report only (ug/L)	all year	001
Dichlorobromomethane	daily maximum	report only (ug/L)	all year	001
Bromoform	monthly average	report only (ug/L)	all year	001
Bromoform	daily maximum	report only (ug/L)	all year	001
Dibromochloromethane	monthly average	report only (ug/L)	all year	001
Dibromochloromethane	daily maximum	report only (ug/L)	all year	001
Chloroform	monthly average	report only (ug/L)	all year	001
Chloroform	daily maximum	report only (ug/L)	all year	001
2,4,6-Trichlorophenol	monthly average	report only (ug/L)	all year	001
2,4,6-Trichlorophenol	daily maximum	report only (ug/L)	all year	001
Rainfall	monthly average	report only (in)	all year	001
Rainfall	daily maximum	report only (in)	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Mercury, total low level	monthly average	≤ 1.3 ng/L	all year	001
Mercury, total low level	daily maximum	≤ 1700 ng/L	all year	001
Mercury, total low level	monthly average	≤ .00003 kg/d	all year	001
Mercury, total low level	daily maximum	≤ .039 kg/d	all year	001
Carcinogen additivity factor	monthly average	report only (col unit)	all year	001
Carcinogen additivity factor	daily maximum	report only (col unit)	all year	001
Cyanide, free available	monthly average	report only (ug/L)	Mar, Jun, Aug, Dec	001
Cyanide, free available	daily maximum	report only (ug/L)	Mar, Jun, Aug, Dec	001
Toxicity [acute], Ceriodaphnia dubia	daily maximum	≤ 1 tox acute	Mar, Jun, Aug, Dec	001
Toxicity [chronic], Ceriodaphnia dubia	monthly average	≤ 1 tox chronic	Mar, Jun, Aug, Dec	001
Toxicity [acute], Pimephales promelas [Fathead Minnow]	daily maximum	≤ 1 tox acute	Mar, Jun, Aug, Dec	001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]	monthly average	≤ 1 tox chronic	Mar, Jun, Aug, Dec	001
pH, maximum	daily maximum	≤ 9 SU	all year	001
pH, minimum	daily minimum	≥ 6.5 SU	all year	001
Solids, total suspended	monthly average	report only (mg/L)	all year	003
Solids, total suspended	daily maximum	report only (mg/L)	all year	003
Overflows	monthly average	report only (occur/mo)	all year	003
Overflows	daily maximum	report only (occur/mo)	all year	003
Overflow volume [SS0 volume, CSO volume]	monthly average	report only (Mgal)	all year	003
Overflow volume [SS0 volume, CSO volume]	daily maximum	report only (Mgal)	all year	003
BOD, carbonaceous [5 day, 20 C]	monthly average	report only (mg/L)	all year	003
BOD, carbonaceous [5 day, 20 C]	daily maximum	report only (mg/L)	all year	003
Solids, total suspended	monthly average	report only (mg/L)	all year	004
Solids, total suspended	daily maximum	report only (mg/L)	all year	004
Overflows	monthly average	report only (occur/mo)	all year	004
Overflows	daily maximum	report only (occur/mo)	all year	004
Overflow volume [SS0 volume, CSO volume]	monthly average	report only (Mgal)	all year	004
Overflow volume [SS0 volume, CSO volume]	daily maximum	report only (Mgal)	all year	004
BOD, carbonaceous [5 day, 20 C]	monthly average	report only (mg/L)	all year	004
BOD, carbonaceous [5 day, 20 C]	daily maximum	report only (mg/L)	all year	004
Solids, total dissolved- 180 deg. C	monthly average	≤ 1561 mg/L	all year	020
Solids, total dissolved- 180 deg. C	monthly average	≤ 35456 kg/d	all year	020
Solids, total dissolved- 180 deg. C	monthly average	≤ 1687 mg/L	all year	021
Solids, total dissolved- 180 deg. C	monthly average	≤ 38312 kg/d	all year	021
Solids, total dissolved- 180 deg. C	monthly average	≤ 1927 mg/L	all year	022
Solids, total dissolved- 180 deg. C	monthly average	≤ 43769 kg/d	all year	022
Solids, total dissolved- 180 deg. C	monthly average	≤ 2167 mg/L	all year	023
Solids, total dissolved- 180 deg. C	monthly average	≤ 49226 kg/d	all year	023
Overflows	monthly average	report only (occur/mo)	all year	300
Overflows	daily maximum	report only (occur/mo)	all year	300
Nitrogen, ammonia in bottom deposits	monthly average	report only (mg/kg)	Mar, Jun, Sep, Dec	581
Nitrogen, ammonia in bottom deposits	daily maximum	report only (mg/kg)	Mar, Jun, Sep, Dec	581
Nitrogen, Kjeldahl, total [as N]	monthly average	report only (mg/kg)	Mar, Jun, Sep, Dec	581
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (mg/kg)	Mar, Jun, Sep, Dec	581
Phosphorous, total, in bottom deposits	monthly average	report only (mg/kg)	Mar, Jun, Sep, Dec	581
Phosphorous, total, in bottom deposits	daily maximum	report only (mg/kg)	Mar, Jun, Sep, Dec	581
Potassium, in bottom deposits	monthly average	report only (mg/kg)	Mar, Jun, Sep, Dec	581
Potassium, in bottom deposits	daily maximum	report only (mg/kg)	Mar, Jun, Sep, Dec	581
Arsenic, dry weight	daily maximum	≤ 75 mg/kg	Mar, Jun, Sep, Dec	581
Cadmium, in bottom deposits [dry wgt]	daily maximum	≤ 85 mg/kg	Mar, Jun, Sep, Dec	581
Copper in bottom deposits [dry wgt]	daily maximum	≤ 4300 mg/kg	Mar, Jun, Sep, Dec	581
Lead, total dry weight [as Pb]	daily maximum	≤ 840 mg/kg	Mar, Jun, Sep, Dec	581
Nickel, tot in bottom deposits [dry wgt]	daily maximum	≤ 420 mg/kg	Mar, Jun, Sep, Dec	581
Zinc in bottom deposits [dry wgt]	daily maximum	≤ 7500 mg/kg	Mar, Jun, Sep, Dec	581
Selenium, dry weight	daily maximum	≤ 100 mg/kg	Mar, Jun, Sep, Dec	581
Fecal coliform	daily maximum	≤ 2000000 MPN/g	Mar, Jun, Sep, Dec	581
Biosolids weight indluding admixtures	monthly average	report only (dry ton)	all year	581
Biosolids weight indluding admixtures	daily maximum	report only (dry ton)	all year	581
Sludge weight, dry	monthly average	report only (dry ton)	all year	581
Sludge weight, dry	daily maximum	report only (dry ton)	all year	581
Mercury, tot in bot deposits [dry wgt]	daily maximum	≤ 57 mg/kg	Mar, Jun, Sep, Dec	581
Molybdenum, sludge, total, dry weight [as Mo]	daily maximum	≤ 75 mg/kg	Mar, Jun, Sep, Dec	581
Nitrogen, ammonia in bottom deposits	monthly average	report only (mg/kg)	Mar, Jun, Sep, Dec	584
Nitrogen, ammonia in bottom deposits	daily maximum	report only (mg/kg)	Mar, Jun, Sep, Dec	584
Nitrogen, Kjeldahl, total [as N]	monthly average	report only (mg/kg)	Mar, Jun, Sep, Dec	584
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (mg/kg)	Mar, Jun, Sep, Dec	584
Phosphorous, total, in bottom deposits	monthly average	report only (mg/kg)	Mar, Jun, Sep, Dec	584
Phosphorous, total, in bottom deposits	daily maximum	report only (mg/kg)	Mar, Jun, Sep, Dec	584
Potassium, in bottom deposits	monthly average	report only (mg/kg)	Mar, Jun, Sep, Dec	584
Potassium, in bottom deposits	daily maximum	report only (mg/kg)	Mar, Jun, Sep, Dec	584
Arsenic, dry weight	monthly average	≤ 41 mg/kg	Mar, Jun, Sep, Dec	584
Arsenic, dry weight	daily maximum	≤ 75 mg/kg	Mar, Jun, Sep, Dec	584
Cadmium, in bottom deposits [dry wgt]	monthly average	≤ 39 mg/kg	Mar, Jun, Sep, Dec	584
Cadmium, in bottom deposits [dry wgt]	daily maximum	≤ 85 mg/kg	Mar, Jun, Sep, Dec	584
Copper in bottom deposits [dry wgt]	monthly average	≤ 1500 mg/kg	Mar, Jun, Sep, Dec	584
Copper in bottom deposits [dry wgt]	daily maximum	≤ 4300 mg/kg	Mar, Jun, Sep, Dec	584
Lead, total dry weight [as Pb]	monthly average	≤ 300 mg/kg	Mar, Jun, Sep, Dec	584
Lead, total dry weight [as Pb]	daily maximum	≤ 840 mg/kg	Mar, Jun, Sep, Dec	584
Nickel, tot in bottom deposits [dry wgt]	monthly average	≤ 420 mg/kg	Mar, Jun, Sep, Dec	584
Nickel, tot in bottom deposits [dry wgt]	daily maximum	≤ 420 mg/kg	Mar, Jun, Sep, Dec	584
Zinc in bottom deposits [dry wgt]	monthly average	≤ 2800 mg/kg	Mar, Jun, Sep, Dec	584
Zinc in bottom deposits [dry wgt]	daily maximum	≤ 7500 mg/kg	Mar, Jun, Sep, Dec	584
Selenium, dry weight	monthly average	≤ 100 mg/kg	Mar, Jun, Sep, Dec	584
Selenium, dry weight	daily maximum	≤ 100 mg/kg	Mar, Jun, Sep, Dec	584
Fecal coliform	monthly average	≤ 1000 MPN/g	Mar, Jun, Sep, Dec	584
Fecal coliform	daily maximum	≤ 1000 MPN/g	Mar, Jun, Sep, Dec	584
Biosolids weight indluding admixtures	monthly average	report only (dry ton)	all year	584
Biosolids weight indluding admixtures	daily maximum	report only (dry ton)	all year	584
Sludge weight, dry	monthly average	report only (dry ton)	all year	584
Sludge weight, dry	daily maximum	report only (dry ton)	all year	584
Mercury, tot in bot deposits [dry wgt]	monthly average	≤ 17 mg/kg	Mar, Jun, Sep, Dec	584
Mercury, tot in bot deposits [dry wgt]	daily maximum	≤ 57 mg/kg	Mar, Jun, Sep, Dec	584
Molybdenum, sludge, total, dry weight [as Mo]	monthly average	≤ 75 mg/kg	Mar, Jun, Sep, Dec	584
Molybdenum, sludge, total, dry weight [as Mo]	daily maximum	≤ 75 mg/kg	Mar, Jun, Sep, Dec	584
Biosolids weight indluding admixtures	monthly average	report only (dry ton)	Dec	586
Biosolids weight indluding admixtures	daily maximum	report only (dry ton)	Dec	586
Biosolids weight indluding admixtures	monthly average	report only (dry ton)	Dec	588
Biosolids weight indluding admixtures	daily maximum	report only (dry ton)	Dec	588
Solids, total suspended	monthly average	report only (mg/L)	all year	601
Solids, total suspended	daily maximum	report only (mg/L)	all year	601
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	601
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	601
Selenium, total recoverable	monthly average	report only (ug/L)	all year	601
Selenium, total recoverable	daily maximum	report only (ug/L)	all year	601
Nickel, total recoverable	monthly average	report only (ug/L)	Mar, Jun, Aug, Dec	601
Nickel, total recoverable	daily maximum	report only (ug/L)	Mar, Jun, Aug, Dec	601
Zinc, total recoverable	monthly average	report only (ug/L)	Mar, Jun, Aug, Dec	601
Zinc, total recoverable	daily maximum	report only (ug/L)	Mar, Jun, Aug, Dec	601
Cadmium, total recoverable	monthly average	report only (ug/L)	all year	601
Cadmium, total recoverable	daily maximum	report only (ug/L)	all year	601
Lead, total recoverable	monthly average	report only (ug/L)	Mar, Jun, Aug, Dec	601
Lead, total recoverable	daily maximum	report only (ug/L)	Mar, Jun, Aug, Dec	601
Chromium, total recoverable	monthly average	report only (ug/L)	Mar, Jun, Aug, Dec	601
Chromium, total recoverable	daily maximum	report only (ug/L)	Mar, Jun, Aug, Dec	601
Copper, total recoverable	monthly average	report only (ug/L)	all year	601
Copper, total recoverable	daily maximum	report only (ug/L)	all year	601
Chromium, hexavalent dissolved [as Cr]	monthly average	report only (ug/L)	Mar, Jun, Aug, Dec	601
Chromium, hexavalent dissolved [as Cr]	daily maximum	report only (ug/L)	Mar, Jun, Aug, Dec	601
Mercury, total low level	monthly average	report only (ng/L)	all year	601
Mercury, total low level	daily maximum	report only (ng/L)	all year	601
pH, maximum	daily maximum	report only (SU)	all year	601
pH, minimum	daily minimum	report only (SU)	all year	601
Solids, total dissolved- 180 deg. C	monthly average	report only (mg/L)	all year	601
Solids, total dissolved- 180 deg. C	daily maximum	report only (mg/L)	all year	601
BOD, carbonaceous [5 day, 20 C]	monthly average	report only (mg/L)	all year	601
BOD, carbonaceous [5 day, 20 C]	daily maximum	report only (mg/L)	all year	601
Solids, total suspended	monthly average	report only (mg/L)	all year	602
Solids, total suspended	daily maximum	report only (mg/L)	all year	602
Bypass Volume	monthly average	report only (Mgal)	all year	602
Bypass Volume	daily maximum	report only (Mgal)	all year	602
BOD, carbonaceous [5 day, 20 C]	monthly average	report only (mg/L)	all year	602
BOD, carbonaceous [5 day, 20 C]	daily maximum	report only (mg/L)	all year	602
Bypass valve	monthly average	report only (occur/mo)	all year	602
Bypass valve	daily maximum	report only (occur/mo)	all year	602
Bypass of treatment	monthly average	report only (hr/mo)	all year	602
Bypass of treatment	daily maximum	report only (hr/mo)	all year	602
Oxygen, dissolved [DO]	daily minimum	≥ 6 mg/L	all year	603
Solids, total suspended	monthly average	≤ 12 mg/L	all year	603
Solids, total suspended	weekly maximum	≤ 18 mg/L	all year	603
Solids, total suspended	monthly average	≤ 273 kg/d	all year	603
Solids, total suspended	weekly maximum	≤ 409 kg/d	all year	603
Nitrogen, ammonia total [as N]	monthly average	≤ 1 mg/L	May–Oct	603
Nitrogen, ammonia total [as N]	monthly average	≤ 3 mg/L	Jan, Feb, Mar, Apr, Nov, Dec	603
Nitrogen, ammonia total [as N]	weekly maximum	≤ 1.5 mg/L	May–Oct	603
Nitrogen, ammonia total [as N]	weekly maximum	≤ 4.5 mg/L	Jan, Feb, Mar, Apr, Nov, Dec	603
Nitrogen, ammonia total [as N]	monthly average	≤ 23 kg/d	May–Oct	603
Nitrogen, ammonia total [as N]	monthly average	≤ 68 kg/d	Jan, Feb, Mar, Apr, Nov, Dec	603
Nitrogen, ammonia total [as N]	weekly maximum	≤ 34 kg/d	May–Oct	603
Nitrogen, ammonia total [as N]	weekly maximum	≤ 103 kg/d	Jan, Feb, Mar, Apr, Nov, Dec	603
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	603
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	603
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 10 mg/L	all year	603
BOD, carbonaceous [5 day, 20 C]	weekly maximum	≤ 15 mg/L	all year	603
BOD, carbonaceous [5 day, 20 C]	monthly average	≤ 228 kg/d	all year	603
BOD, carbonaceous [5 day, 20 C]	weekly maximum	≤ 341 kg/d	all year	603
Temperature, water deg. centigrade	monthly average	report only (deg C)	all year	801
Temperature, water deg. centigrade	daily maximum	report only (deg C)	all year	801
Oxygen, dissolved [DO]	daily minimum	report only (mg/L)	all year	801
pH	daily minimum	report only (SU)	all year	801
pH	daily maximum	report only (SU)	all year	801
Nitrogen, ammonia total [as N]	monthly average	report only (mg/L)	all year	801
Nitrogen, ammonia total [as N]	daily maximum	report only (mg/L)	all year	801
Nitrogen, Kjeldahl, total [as N]	monthly average	report only (mg/L)	all year	801
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (mg/L)	all year	801
Nitrite + Nitrate total [as N]	monthly average	report only (mg/L)	all year	801
Nitrite + Nitrate total [as N]	daily maximum	report only (mg/L)	all year	801
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	801
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	801
E. coli, MTEC-MF	monthly geometric mean	report only (MPN/100mL)	Jun–Aug	801
E. coli, MTEC-MF	daily maximum	report only (MPN/100mL)	Jun–Aug	801
Solids, total dissolved- 180 deg. C	monthly average	report only (mg/L)	all year	801
Solids, total dissolved- 180 deg. C	daily maximum	report only (mg/L)	all year	801
%Effect Static Renewal 48Hr Acute Ceriodaphnia dubia	monthly average	report only (%)	Mar, Jun, Aug, Dec	801
%Effect Static Renewal 48Hr Acute Ceriodaphnia dubia	daily maximum	report only (%)	Mar, Jun, Aug, Dec	801
%Effect Static Renewal 96Hr Acute Pimephales promelas	monthly average	report only (%)	Mar, Jun, Aug, Dec	801
%Effect Static Renewal 96Hr Acute Pimephales promelas	daily maximum	report only (%)	Mar, Jun, Aug, Dec	801
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia	monthly average	report only (%)	Mar, Jun, Aug, Dec	801
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia	daily maximum	report only (%)	Mar, Jun, Aug, Dec	801
%Effect Static Renewal 7Day Chronic Pimephales promelas	monthly average	report only (%)	Mar, Jun, Aug, Dec	801
%Effect Static Renewal 7Day Chronic Pimephales promelas	daily maximum	report only (%)	Mar, Jun, Aug, Dec	801
Streamflow	monthly average	report only (cfs)	all year	802
Streamflow	daily maximum	report only (cfs)	all year	802
Temperature, water deg. centigrade	monthly average	report only (deg C)	all year	901
Temperature, water deg. centigrade	daily maximum	report only (deg C)	all year	901
Oxygen, dissolved [DO]	daily minimum	report only (mg/L)	all year	901
pH	daily minimum	report only (SU)	all year	901
pH	daily maximum	report only (SU)	all year	901
Nitrogen, ammonia total [as N]	monthly average	report only (mg/L)	all year	901
Nitrogen, ammonia total [as N]	daily maximum	report only (mg/L)	all year	901
Nitrogen, Kjeldahl, total [as N]	monthly average	report only (mg/L)	all year	901
Nitrogen, Kjeldahl, total [as N]	daily maximum	report only (mg/L)	all year	901
Nitrite + Nitrate total [as N]	monthly average	report only (mg/L)	all year	901
Nitrite + Nitrate total [as N]	daily maximum	report only (mg/L)	all year	901
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	901
Phosphorus, total [as P]	daily maximum	report only (mg/L)	all year	901
Hardness, total [as CaCO3]	monthly average	report only (mg/L)	all year	901
Hardness, total [as CaCO3]	daily maximum	report only (mg/L)	all year	901
E. coli, MTEC-MF	monthly geometric mean	report only (MPN/100mL)	Jun–Aug	901
E. coli, MTEC-MF	daily maximum	report only (MPN/100mL)	Jun–Aug	901
Solids, total dissolved- 180 deg. C	monthly average	report only (mg/L)	all year	901
Solids, total dissolved- 180 deg. C	daily maximum	report only (mg/L)	all year	901

New limits from Dec 1, 2026

Parameter	New limit	New or tighter	Median, last 12 months	× new limit
Selenium, total recoverable, monthly average	5.3 ug/L	new	6.5 ug/L (6 values)	1.23×
Cadmium, total recoverable, daily maximum	0.59 kg/d	new	—	—
Cadmium, total recoverable, daily maximum	26 ug/L	new	—	—
Cadmium, total recoverable, monthly average	0.17 kg/d	new	—	—
Cadmium, total recoverable, monthly average	7.7 ug/L	new	—	—
Carcinogen additivity factor, daily maximum	1 col unit	new	0.0432 col unit (10 values)	0.0432×
Dibromochloromethane, daily maximum	3365 ug/L	new	84.6 ug/L (4 values)	0.0251×
Dibromochloromethane, daily maximum	76 kg/d	new	—	—
Dibromochloromethane, monthly average	150 ug/L	new	84.6 ug/L (4 values)	0.564×
Dibromochloromethane, monthly average	3.4 kg/d	new	—	—
Selenium, total recoverable, daily maximum	1.6 kg/d	new	—	—
Selenium, total recoverable, daily maximum	72 ug/L	new	6.5 ug/L (6 values)	0.0903×
Selenium, total recoverable, monthly average	0.12 kg/d	new	—	—

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/OH0027952 · MCP: https://passage-data.com/mcp