City of Marshfield — NPDES permit MO0040843: limits, due date and EPA's record

NPDES permit MO0040843 · Major POTW · administratively continued, expires 2023-09-30 · EPA's file as of 2026-09-19

This permit expired on 2023-09-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

Last period with anything received: 2026-08-31. Most often over: E. coli (5), Solids, suspended percent removal (1), pH (1).

Reporting

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

Limits in force (50)

Outfall	Parameter	Statistic	Limit	Months
002	BOD, 5-day, 20 deg. C	WKLY AVG	<= 15 mg/L	all year
002	BOD, 5-day, 20 deg. C	MO AVG	<= 10 mg/L	all year
002	pH	MINIMUM	>= 6.5 SU	all year
002	pH	MAXIMUM	<= 9 SU	all year
002	Solids, total suspended	WKLY AVG	<= 20 mg/L	all year
002	Solids, total suspended	MO AVG	<= 15 mg/L	all year
002	Oil and grease [soxhlet extr.] tot.	DAILY MX	<= 15 mg/L	all year
002	Oil and grease [soxhlet extr.] tot.	MO AVG	<= 10 mg/L	all year
002	Nitrogen, ammonia total [as N]	DAILY MX	report only	Jan, Feb, Mar, Oct, Nov, Dec
002	Nitrogen, ammonia total [as N]	DAILY MX	<= 4.7 mg/L	Apr, May, Jun, Jul, Aug, Sep
002	Nitrogen, ammonia total [as N]	MO AVG	report only	Jan, Feb, Mar, Oct, Nov, Dec
002	Nitrogen, ammonia total [as N]	MO AVG	<= .9 mg/L	Apr, May, Jun, Jul, Aug, Sep
002	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
002	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
002	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
002	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
002	Phosphorus, total [as P]	DAILY MX	report only	all year
002	Phosphorus, total [as P]	MO AVG	report only	all year
002	Cyanide, free [amenable to chlorination]	DAILY MX	<= 10 ug/L	all year
002	Cyanide, free [amenable to chlorination]	MO AVG	<= 10 ug/L	all year
002	Hardness, total [as CaCO3]	DAILY MX	report only	all year
002	Hardness, total [as CaCO3]	MO AVG	report only	all year
002	Zinc, total recoverable	DAILY MX	<= 254.8 ug/L	all year
002	Zinc, total recoverable	MO AVG	<= 120.1 ug/L	all year
002	Cadmium, total recoverable	DAILY MX	report only	all year
002	Cadmium, total recoverable	MO AVG	report only	all year
002	Lead, total recoverable	DAILY MX	<= 16.9 ug/L	all year
002	Lead, total recoverable	MO AVG	<= 5.4 ug/L	all year
002	Copper, total recoverable	DAILY MX	<= 32.3 ug/L	all year
002	Copper, total recoverable	MO AVG	<= 14.4 ug/L	all year
002	Chromium, hexavalent dissolved [as Cr]	DAILY MX	report only	all year
002	Chromium, hexavalent dissolved [as Cr]	MO AVG	report only	all year
002	Chromium, trivalent total recoverable	DAILY MX	report only	all year
002	Chromium, trivalent total recoverable	MO AVG	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	E. coli	DAILY MX	<= 126 #/100mL	all year
002	E. coli	30DA GM	report only	all year
002	Toxicity [acute], Ceriodaphnia dubia	DAILY MX	report only	all year
002	Toxicity [acute], Pimephales promelas [Fathead Minnow]	DAILY MX	report only	all year
002	BOD, 5-day, percent removal	MO AV MN	>= 85 %	all year
002	Solids, suspended percent removal	MO AV MN	>= 85 %	all year
INF	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
INF	Nitrogen, ammonia total [as N]	MO AVG	report only	all year
INF	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
INF	Nitrogen, Kjeldahl, total [as N]	MO AVG	report only	all year
INF	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
INF	Nitrite + Nitrate total [as N]	MO AVG	report only	all year
INF	Phosphorus, total [as P]	DAILY MX	report only	all year
INF	Phosphorus, total [as P]	MO AVG	report only	all year