SOUTH BEND MUNICIPAL WWTP — NPDES permit IN0024520: limits, due date and EPA's record

NPDES permit IN0024520 · Major POTW · effective, expires 2026-11-30 · 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: Solids, total suspended (3), Nitrogen, ammonia total [as N] (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 (234)

Outfall	Parameter	Statistic	Limit	Months
001	Duration	MO TOTAL	report only	all year
001	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
001	Precipitation, monthly accumulation	MO TOTAL	report only	all year
001	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
002	Duration	MO TOTAL	report only	all year
002	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
002	Precipitation, monthly accumulation	MO TOTAL	report only	all year
002	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
003	Duration	MO TOTAL	report only	all year
003	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
003	Precipitation, monthly accumulation	MO TOTAL	report only	all year
003	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
004	Duration	MO TOTAL	report only	all year
004	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
004	Precipitation, monthly accumulation	MO TOTAL	report only	all year
004	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
010	Duration	MO TOTAL	report only	all year
010	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
010	Precipitation, monthly accumulation	MO TOTAL	report only	all year
010	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
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
021	Duration	MO TOTAL	report only	all year
021	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
021	Precipitation, monthly accumulation	MO TOTAL	report only	all year
021	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
022	Duration	MO TOTAL	report only	all year
022	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
022	Precipitation, monthly accumulation	MO TOTAL	report only	all year
022	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
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
035	Duration	MO TOTAL	report only	all year
035	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
035	Precipitation, monthly accumulation	MO TOTAL	report only	all year
035	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
036	Duration	MO TOTAL	report only	all year
036	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
036	Precipitation, monthly accumulation	MO TOTAL	report only	all year
036	Discharge event observation [Visual Monitoring]	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
038	Duration	MO TOTAL	report only	all year
038	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
038	Precipitation, monthly accumulation	MO TOTAL	report only	all year
038	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
041	Duration	MO TOTAL	report only	all year
041	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
041	Precipitation, monthly accumulation	MO TOTAL	report only	all year
041	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
042	Duration	MO TOTAL	report only	all year
042	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
042	Precipitation, monthly accumulation	MO TOTAL	report only	all year
042	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
044	Duration	MO TOTAL	report only	all year
044	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
044	Precipitation, monthly accumulation	MO TOTAL	report only	all year
044	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
045	Duration	MO TOTAL	report only	all year
045	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
045	Precipitation, monthly accumulation	MO TOTAL	report only	all year
045	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
047	pH	DAILY MN	>= 6 SU	all year
047	pH	DAILY MX	<= 9 SU	all year
047	Solids, total suspended	MO AVG	<= 20 mg/L	all year
047	Solids, total suspended	MX WK AV	<= 30 mg/L	all year
047	Solids, total suspended	MO AVG	<= 12851 lb/d	all year
047	Solids, total suspended	MX WK AV	<= 19277 lb/d	all year
047	Nitrogen, total [as N]	MO AVG	report only	all year
047	Nitrogen, total [as N]	MO AVG	report only	all year
047	Nitrogen, ammonia total [as N]	MO AVG	<= 2 mg/L	May, Jun, Jul, Aug, Sep, Oct, Nov
047	Nitrogen, ammonia total [as N]	MO AVG	<= 2.9 mg/L	Jan, Feb, Mar, Apr, Dec
047	Nitrogen, ammonia total [as N]	DAILY MX	<= 6.4 mg/L	May, Jun, Jul, Aug, Sep, Oct, Nov
047	Nitrogen, ammonia total [as N]	DAILY MX	<= 6.7 mg/L	Jan, Feb, Mar, Apr, Dec
047	Nitrogen, ammonia total [as N]	MO AVG	<= 1285 lb/d	May, Jun, Jul, Aug, Sep, Oct, Nov
047	Nitrogen, ammonia total [as N]	MO AVG	<= 1863 lb/d	Jan, Feb, Mar, Apr, Dec
047	Nitrogen, ammonia total [as N]	DAILY MX	<= 4112 lb/d	May, Jun, Jul, Aug, Sep, Oct, Nov
047	Nitrogen, ammonia total [as N]	DAILY MX	<= 4305 lb/d	Jan, Feb, Mar, Apr, Dec
047	Phosphorus, total [as P]	MO AVG	<= 1 mg/L	all year
047	Phosphorus, total [as P]	MO AVG	report only	all year
047	Cyanide, free [as free]	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Cyanide, free [as free]	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Cyanide, free [as free]	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Cyanide, free [as free]	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Cyanide, free [as free]	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Cyanide, free [as free]	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Nickel, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Zinc, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Cadmium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Lead, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Chromium, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Copper, total recoverable	DAILY MX	report only	Mar, Jun, Sep, Dec
047	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
047	Chlorine, total residual	MO AVG	<= .01 mg/L	all year
047	Chlorine, total residual	DAILY MX	< .06 mg/L	all year
047	Chlorine, total residual	MO AVG	<= 6.4 lb/d	all year
047	Chlorine, total residual	DAILY MX	< 38.6 lb/d	all year
047	E. coli, colony forming units [CFU]	MO GEO	<= 125 CFU/100mL	Apr, May, Jun, Jul, Aug, Sep, Oct
047	E. coli, colony forming units [CFU]	MO GEO	report only	Jan, Feb, Mar, Nov, Dec
047	E. coli, colony forming units [CFU]	DAILY MX	<= 235 CFU/100mL	Apr, May, Jun, Jul, Aug, Sep, Oct
047	E. coli, colony forming units [CFU]	DAILY MX	report only	Jan, Feb, Mar, Nov, Dec
047	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute	May, Nov
047	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute	Jun, Dec
047	Toxicity [acute], Ceriodaphnia dubia	MAXIMUM	<= 1 tox acute	Jun, Dec
047	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 4 tox chronic	May, Nov
047	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 4 tox chronic	Jun, Dec
047	Toxicity [chronic], Ceriodaphnia dubia	MAXIMUM	<= 4 tox chronic	Jun, Dec
047	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute	May, Nov
047	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute	Jun, Dec
047	Toxicity [acute], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 1 tox acute	Jun, Dec
047	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 4 tox chronic	May, Nov
047	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 4 tox chronic	Jun, Dec
047	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	MAXIMUM	<= 4 tox chronic	Jun, Dec
047	Mercury, total recoverable	ANNL AVG	<= 2.7 ng/L	Feb, Apr, Jun, Aug, Oct, Dec
047	Mercury, total recoverable	DAILY MX	report only	Feb, Apr, Jun, Aug, Oct, Dec
047	Mercury, total recoverable	DAILY MX	report only	Feb, Apr, Jun, Aug, Oct, Dec
047	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 25 mg/L	Jan, Feb, Mar, Apr, Dec
047	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 20 mg/L	May, Jun, Jul, Aug, Sep, Oct, Nov
047	BOD, carbonaceous [5 day, 20 C]	MX WK AV	<= 40 mg/L	Jan, Feb, Mar, Apr, Dec
047	BOD, carbonaceous [5 day, 20 C]	MX WK AV	<= 30 mg/L	May, Jun, Jul, Aug, Sep, Oct, Nov
047	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 16064 lb/d	Jan, Feb, Mar, Apr, Dec
047	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 12851 lb/d	May, Jun, Jul, Aug, Sep, Oct, Nov
047	BOD, carbonaceous [5 day, 20 C]	MX WK AV	<= 25703 lb/d	Jan, Feb, Mar, Apr, Dec
047	BOD, carbonaceous [5 day, 20 C]	MX WK AV	<= 19277 lb/d	May, Jun, Jul, Aug, Sep, Oct, Nov
047	Phosphorus, total percent removal	MO AV MN	>= 70 %	all year
047	Flow, total	MO TOTAL	report only	all year
048	Duration	MO TOTAL	report only	all year
048	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
048	Precipitation, monthly accumulation	MO TOTAL	report only	all year
048	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
049	Duration	MO TOTAL	report only	all year
049	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
049	Precipitation, monthly accumulation	MO TOTAL	report only	all year
049	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
060	Duration	MO TOTAL	report only	all year
060	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
060	Precipitation, monthly accumulation	MO TOTAL	report only	all year
060	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
11A	Duration	MO TOTAL	report only	all year
11A	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
11A	Precipitation, monthly accumulation	MO TOTAL	report only	all year
11A	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year
11B	Duration	MO TOTAL	report only	all year
11B	Overflow volume [SS0 volume, CSO volume]	MO TOTAL	report only	all year
11B	Precipitation, monthly accumulation	MO TOTAL	report only	all year
11B	Discharge event observation [Visual Monitoring]	MO TOTAL	report only	all year