LYONS WASTEWATER TREATMENT PLANT — NPDES permit IN0023639: limits, due date and EPA's record

NPDES permit IN0023639 · Minor POTW · effective, expires 2029-03-31 · 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

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 (19)

Outfall	Parameter	Statistic	Limit	Months
002	Streamflow	MO AVG	report only	all year
002	pH	DAILY MN	>= 6 SU	all year
002	pH	DAILY MX	<= 9 SU	all year
002	Solids, total suspended	MO AVG	<= 70 mg/L	all year
002	Solids, total suspended	MX WK AV	<= 105 mg/L	all year
002	Nitrogen, ammonia total [as N]	MO AVG	<= 8.6 mg/L	May, Jun, Jul, Aug, Sep, Oct, Nov
002	Nitrogen, ammonia total [as N]	MO AVG	<= 9.3 mg/L	Jan, Feb, Mar, Apr, Dec
002	Nitrogen, ammonia total [as N]	MX WK AV	<= 12.9 mg/L	May, Jun, Jul, Aug, Sep, Oct, Nov
002	Nitrogen, ammonia total [as N]	MX WK AV	<= 14 mg/L	Jan, Feb, Mar, Apr, Dec
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	Chlorine, total residual	MO AVG	< .06 mg/L	all year
002	Chlorine, total residual	DAILY MX	< .06 mg/L	all year
002	E. coli, colony forming units [CFU]	MO GEO	<= 125 CFU/100mL	Apr, May, Jun, Jul, Aug, Sep, Oct
002	E. coli, colony forming units [CFU]	DAILY MX	<= 235 CFU/100mL	Apr, May, Jun, Jul, Aug, Sep, Oct
002	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 25 mg/L	all year
002	BOD, carbonaceous [5 day, 20 C]	MX WK AV	<= 40 mg/L	all year
002	Dilution factor	DAILY MX	<= .1 Ratio	all year
002	Flow, total	MO TOTAL	report only	all year