SHOALS WWTP — NPDES permit IN0040631: limits, due date and EPA's record

NPDES permit IN0040631 · Minor POTW · effective, expires 2028-07-20 · EPA's file as of 2026-09-19

Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

Last period with anything received: 2026-07-31. Most often over: E. coli, colony forming units [CFU] (8), Dilution factor (2), Solids, total suspended (2).

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 (17)

Outfall	Parameter	Statistic	Limit	Months
001	Streamflow	MO AVG	report only	all year
001	pH	DAILY MN	>= 6 SU	all year
001	pH	DAILY MX	<= 9 SU	all year
001	Solids, total suspended	MO AVG	<= 70 mg/L	all year
001	Solids, total suspended	MX WK AV	<= 105 mg/L	all year
001	Nitrogen, ammonia total [as N]	MO AVG	<= 8.6 mg/L	May, Jun, Jul, Aug, Sep, Oct, Nov
001	Nitrogen, ammonia total [as N]	MO AVG	<= 9.3 mg/L	Jan, Feb, Mar, Apr, Dec
001	Nitrogen, ammonia total [as N]	MX WK AV	<= 12.9 mg/L	May, Jun, Jul, Aug, Sep, Oct, Nov
001	Nitrogen, ammonia total [as N]	MX WK AV	<= 14 mg/L	Jan, Feb, Mar, Apr, Dec
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	E. coli, colony forming units [CFU]	MO GEO	<= 125 CFU/100mL	Apr, May, Jun, Jul, Aug, Sep, Oct
001	E. coli, colony forming units [CFU]	DAILY MX	<= 235 CFU/100mL	Apr, May, Jun, Jul, Aug, Sep, Oct
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 25 mg/L	all year
001	BOD, carbonaceous [5 day, 20 C]	MX WK AV	<= 40 mg/L	all year
001	Dilution factor	DAILY MX	<= .1 Ratio	all year
001	Flow, total	MO TOTAL	report only	all year