SEWERAGE DISTRICT NO. 1 OF TANGIPAHOA PARISH — NPDES permit LA0123153: limits, due date and EPA's record

NPDES permit LA0123153 · Minor POTW · effective, expires 2029-06-30 · EPA's file as of 2026-09-19

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

Last period with anything received: 2026-06-30. Most often over: Solids, total suspended (12), Nitrogen, ammonia total [as N] (7), Coliform, fecal general (6).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among LA permits in EPA's filings — check your permit).

Limits in force (23)

Outfall	Parameter	Statistic	Limit	Months
001	Oxygen, dissolved [DO]	MO AV MN	>= 5 mg/L	all year
001	pH	INST MIN	>= 6 SU	all year
001	pH	INST MAX	<= 9 SU	all year
001	Solids, total suspended	MO AVG	<= 15 mg/L	all year
001	Solids, total suspended	WKLY AVG	<= 23 mg/L	all year
001	Solids, total suspended	MO AVG	<= 11.4 lb/d	all year
001	Nitrogen, total [as N]	MO AVG	report only	all year
001	Nitrogen, total [as N]	WKLY AVG	report only	all year
001	Nitrogen, total [as N]	MO AVG	report only	all year
001	Nitrogen, ammonia total [as N]	MO AVG	<= 2 mg/L	all year
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 4 mg/L	all year
001	Nitrogen, ammonia total [as N]	MO AVG	<= 1.5 lb/d	all year
001	Phosphorus, total [as P]	MO AVG	report only	all year
001	Phosphorus, total [as P]	WKLY AVG	report only	all year
001	Phosphorus, total [as P]	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	WKLY AVG	report only	all year
001	Chlorine, total residual	WKLY AVG	report only	all year
001	Coliform, fecal general	MOAV GEO	<= 200 #/100mL	all year
001	Coliform, fecal general	WE	<= 400 #/100mL	all year
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 10 mg/L	all year
001	BOD, carbonaceous [5 day, 20 C]	WKLY AVG	<= 15 mg/L	all year
001	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 7.6 lb/d	all year