ELKHART WWTP — NPDES permit IN0025674: limits, due date and EPA's record

NPDES permit IN0025674 · Major POTW · effective, expires 2027-04-30 · EPA's file as of 2026-09-19

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

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 (237)

Outfall	Parameter	Statistic	Limit	Months
005	Duration	MO TOTAL	report only	all year
005	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
005	Precipitation, monthly accumulation	MO TOTAL	report only	all year
005	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
006	Duration	MO TOTAL	report only	all year
006	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
006	Precipitation, monthly accumulation	MO TOTAL	report only	all year
006	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
007	Duration	MO TOTAL	report only	all year
007	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
007	Precipitation, monthly accumulation	MO TOTAL	report only	all year
007	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
008	Duration	MO TOTAL	report only	all year
008	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
008	Precipitation, monthly accumulation	MO TOTAL	report only	all year
008	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
009	Duration	MO TOTAL	report only	all year
009	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
009	Precipitation, monthly accumulation	MO TOTAL	report only	all year
009	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
011	Duration	MO TOTAL	report only	all year
011	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
011	Precipitation, monthly accumulation	MO TOTAL	report only	all year
011	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
012	Duration	MO TOTAL	report only	all year
012	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
012	Precipitation, monthly accumulation	MO TOTAL	report only	all year
012	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
013	Duration	MO TOTAL	report only	all year
013	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
013	Precipitation, monthly accumulation	MO TOTAL	report only	all year
013	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
014	Duration	MO TOTAL	report only	all year
014	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
014	Precipitation, monthly accumulation	MO TOTAL	report only	all year
014	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
015	Duration	MO TOTAL	report only	all year
015	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
015	Precipitation, monthly accumulation	MO TOTAL	report only	all year
015	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
016	Duration	MO TOTAL	report only	all year
016	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
016	Precipitation, monthly accumulation	MO TOTAL	report only	all year
016	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
017	Duration	MO TOTAL	report only	all year
017	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
017	Precipitation, monthly accumulation	MO TOTAL	report only	all year
017	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
018	Duration	MO TOTAL	report only	all year
018	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
018	Precipitation, monthly accumulation	MO TOTAL	report only	all year
018	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
019	Duration	MO TOTAL	report only	all year
019	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
019	Precipitation, monthly accumulation	MO TOTAL	report only	all year
019	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
020	Duration	MO TOTAL	report only	all year
020	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
020	Precipitation, monthly accumulation	MO TOTAL	report only	all year
020	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
023	Duration	MO TOTAL	report only	all year
023	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
023	Precipitation, monthly accumulation	MO TOTAL	report only	all year
023	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
024	Duration	MO TOTAL	report only	all year
024	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
024	Precipitation, monthly accumulation	MO TOTAL	report only	all year
024	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
025	Duration	MO TOTAL	report only	all year
025	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
025	Precipitation, monthly accumulation	MO TOTAL	report only	all year
025	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
026	Duration	MO TOTAL	report only	all year
026	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
026	Precipitation, monthly accumulation	MO TOTAL	report only	all year
026	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
027	Duration	MO TOTAL	report only	all year
027	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
027	Precipitation, monthly accumulation	MO TOTAL	report only	all year
027	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
028	Duration	MO TOTAL	report only	all year
028	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
028	Precipitation, monthly accumulation	MO TOTAL	report only	all year
028	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
029	Duration	MO TOTAL	report only	all year
029	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
029	Precipitation, monthly accumulation	MO TOTAL	report only	all year
029	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
031	Duration	MO TOTAL	report only	all year
031	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
031	Precipitation, monthly accumulation	MO TOTAL	report only	all year
031	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
032	Duration	MO TOTAL	report only	all year
032	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
032	Precipitation, monthly accumulation	MO TOTAL	report only	all year
032	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
033	Duration	MO TOTAL	report only	all year
033	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
033	Precipitation, monthly accumulation	MO TOTAL	report only	all year
033	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
034	Duration	MO TOTAL	report only	all year
034	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
034	Precipitation, monthly accumulation	MO TOTAL	report only	all year
034	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
035	Oxygen, dissolved [DO]	DLYAVMIN	>= 4 mg/L	all year
035	pH	DAILY MN	>= 6 SU	all year
035	pH	DAILY MX	<= 9 SU	all year
035	Solids, total suspended	MO AVG	<= 30 mg/L	all year
035	Solids, total suspended	MX WK AV	<= 45 mg/L	all year
035	Solids, total suspended	MO AVG	<= 7511 lb/d	all year
035	Solids, total suspended	MX WK AV	<= 11266 lb/d	all year
035	Nitrogen, total [as N]	MO AVG	report only	all year
035	Nitrogen, total [as N]	MO AVG	report only	all year
035	Nitrogen, ammonia total [as N]	MO AVG	<= 4.2 mg/L	May, Jun, Jul, Aug, Sep, Oct, Nov
035	Nitrogen, ammonia total [as N]	MO AVG	<= 4.4 mg/L	Jan, Feb, Mar, Apr, Dec
035	Nitrogen, ammonia total [as N]	DAILY MX	<= 9.9 mg/L	May, Jun, Jul, Aug, Sep, Oct, Nov
035	Nitrogen, ammonia total [as N]	DAILY MX	<= 10.2 mg/L	Jan, Feb, Mar, Apr, Dec
035	Nitrogen, ammonia total [as N]	MO AVG	<= 1051 lb/d	May, Jun, Jul, Aug, Sep, Oct, Nov
035	Nitrogen, ammonia total [as N]	MO AVG	<= 1102 lb/d	Jan, Feb, Mar, Apr, Dec
035	Nitrogen, ammonia total [as N]	DAILY MX	<= 2478 lb/d	May, Jun, Jul, Aug, Sep, Oct, Nov
035	Nitrogen, ammonia total [as N]	DAILY MX	<= 2554 lb/d	Jan, Feb, Mar, Apr, Dec
035	Phosphorus, total [as P]	MO AVG	<= 1 mg/L	all year
035	Phosphorus, total [as P]	MO AVG	report only	all year
035	Cyanide, free [as free]	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Cyanide, free [as free]	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Cyanide, free [as free]	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Cyanide, free [as free]	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Cyanide, free [as free]	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Cyanide, free [as free]	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Silver total recoverable	MO AVG	<= .00038 mg/L	all year
035	Silver total recoverable	DAILY MX	<= .00077 mg/L	all year
035	Silver total recoverable	MO AVG	<= .063 lb/d	all year
035	Silver total recoverable	DAILY MX	<= .13 lb/d	all year
035	Silver total recoverable	MO AVG	report only	all year
035	Silver total recoverable	DAILY MX	report only	all year
035	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
035	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
035	E. coli, colony forming units [CFU]	MO GEO	<= 125 CFU/100mL	Apr, May, Jun, Jul, Aug, Sep, Oct
035	E. coli, colony forming units [CFU]	MO GEO	report only	Jan, Feb, Mar, Nov, Dec
035	E. coli, colony forming units [CFU]	DAILY MX	<= 235 CFU/100mL	Apr, May, Jun, Jul, Aug, Sep, Oct
035	E. coli, colony forming units [CFU]	DAILY MX	report only	Jan, Feb, Mar, Nov, Dec
035	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute (alert)	Apr, Oct
035	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute (alert)	Apr, Oct
035	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute (alert)	May, Nov
035	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute (alert)	May, Nov
035	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute (alert)	May, Nov
035	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute (alert)	Jan, Jul
035	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute (alert)	Jan, Jul
035	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute (alert)	Feb, Aug
035	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute (alert)	Feb, Aug
035	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute (alert)	Feb, Aug
035	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 8 tox chronic (alert)	Apr, Oct
035	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 8 tox chronic (alert)	Apr, Oct
035	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 8 tox chronic (alert)	May, Nov
035	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 8 tox chronic (alert)	May, Nov
035	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 8 tox chronic (alert)	May, Nov
035	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 8 tox chronic (alert)	Jan, Jul
035	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 8 tox chronic (alert)	Jan, Jul
035	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 8 tox chronic (alert)	Feb, Aug
035	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 8 tox chronic (alert)	Feb, Aug
035	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 8 tox chronic (alert)	Feb, Aug
035	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute (alert)	Apr, Oct
035	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute (alert)	Apr, Oct
035	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute (alert)	May, Nov
035	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute (alert)	May, Nov
035	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute (alert)	May, Nov
035	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute (alert)	Jan, Jul
035	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute (alert)	Jan, Jul
035	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute (alert)	Feb, Aug
035	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute (alert)	Feb, Aug
035	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute (alert)	Feb, Aug
035	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 8 tox chronic	Apr, Oct
035	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 8 tox chronic	Apr, Oct
035	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 8 tox chronic	May, Nov
035	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 8 tox chronic	May, Nov
035	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 8 tox chronic	May, Nov
035	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 8 tox chronic (alert)	Jan, Jul
035	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 8 tox chronic (alert)	Jan, Jul
035	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 8 tox chronic (alert)	Feb, Aug
035	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 8 tox chronic (alert)	Feb, Aug
035	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 8 tox chronic (alert)	Feb, Aug
035	Mercury, total recoverable	ANNL AVG	<= 1.6 ng/L	Feb, Apr, Jun, Aug, Oct, Dec
035	Mercury, total recoverable	DAILY MX	report only	Feb, Apr, Jun, Aug, Oct, Dec
035	Mercury, total recoverable	DAILY MX	report only	Feb, Apr, Jun, Aug, Oct, Dec
035	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 25 mg/L	all year
035	BOD, carbonaceous [5 day, 20 C]	MX WK AV	<= 40 mg/L	all year
035	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 6259 lb/d	all year
035	BOD, carbonaceous [5 day, 20 C]	MX WK AV	<= 10014 lb/d	all year
035	Phosphorus, total percent removal	MO AV MN	>= 75 %	all year
035	Flow, total	MO TOTAL	report only	all year
037	Duration	MO TOTAL	report only	all year
037	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
037	Precipitation, monthly accumulation	MO TOTAL	report only	all year
037	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
039	Duration	MO TOTAL	report only	all year
039	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
039	Precipitation, monthly accumulation	MO TOTAL	report only	all year
039	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
040	Duration	MO TOTAL	report only	all year
040	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
040	Precipitation, monthly accumulation	MO TOTAL	report only	all year
040	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year