SANDWICH, CITY OF — NPDES permit IL0030970: limits, due date and EPA's record

NPDES permit IL0030970 · 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

Reporting

Reports are due about 25 days after each monitoring period ends (the most common figure among IL permits in EPA's filings — check your permit).

Limits in force (145)

Outfall	Parameter	Statistic	Limit	Months
002	Oxygen, dissolved [DO]	MINIMUM	report only	all year
002	BOD, 5-day, 20 deg. C	MO AVG	<= 30 mg/L	all year
002	BOD, 5-day, 20 deg. C	WKLY AVG	<= 45 mg/L	all year
002	pH	MINIMUM	>= 6 SU	all year
002	pH	MAXIMUM	<= 9 SU	all year
002	Solids, total suspended	MO AVG	<= 30 mg/L	all year
002	Solids, total suspended	WKLY AVG	<= 45 mg/L	all year
002	Nitrogen, ammonia total [as N]	DAILY MX	report only	all year
002	Phosphorus, total [as P]	MO AVG	report only	all year
002	Phosphorus, total [as P]	DAILY MX	report only	all year
002	Chlorine, total residual	MO AVG	<= .75 mg/L	all year
002	Coliform, fecal general	DAILY MX	<= 400 #/100mL	all year
002	Flow, total	MO TOTAL	report only	all year
003	Temperature, water deg. fahrenheit	MO MAX	report only	all year
003	Temperature, water deg. fahrenheit	MO MAX	report only	all year
003	Oxygen, dissolved [DO]	MO AV MN	>= 5.5 mg/L	Jan, Feb, Aug, Sep, Oct, Nov, Dec
003	Oxygen, dissolved [DO]	MO AV MN	>= 5.5 mg/L	Jan, Feb, Aug, Sep, Oct, Nov, Dec
003	Oxygen, dissolved [DO]	MN WK AV	>= 6 mg/L	Mar, Apr, May, Jun, Jul
003	Oxygen, dissolved [DO]	MN WK AV	>= 6 mg/L	Mar, Apr, May, Jun, Jul
003	Oxygen, dissolved [DO]	MN WK AV	>= 4 mg/L	Jan, Feb, Aug, Sep, Oct, Nov, Dec
003	Oxygen, dissolved [DO]	MN WK AV	>= 4 mg/L	Jan, Feb, Aug, Sep, Oct, Nov, Dec
003	Oxygen, dissolved [DO]	DAILY MN	>= 5 mg/L	Mar, Apr, May, Jun, Jul
003	Oxygen, dissolved [DO]	DAILY MN	>= 5 mg/L	Mar, Apr, May, Jun, Jul
003	Oxygen, dissolved [DO]	DAILY MN	>= 3.5 mg/L	Jan, Feb, Aug, Sep, Oct, Nov, Dec
003	Oxygen, dissolved [DO]	DAILY MN	>= 3.5 mg/L	Jan, Feb, Aug, Sep, Oct, Nov, Dec
003	pH	MINIMUM	>= 6 SU	all year
003	pH	MINIMUM	>= 6 SU	all year
003	pH	MAXIMUM	<= 9 SU	all year
003	pH	MAXIMUM	<= 9 SU	all year
003	Alkalinity, total [as CaCO3]	DAILY MX	report only	all year
003	Alkalinity, total [as CaCO3]	DAILY MX	report only	all year
003	Solids, total suspended	MO AVG	<= 12 mg/L	all year
003	Solids, total suspended	MO AVG	<= 12 mg/L	all year
003	Solids, total suspended	DAILY MX	<= 24 mg/L	all year
003	Solids, total suspended	DAILY MX	<= 24 mg/L	all year
003	Solids, total suspended	MO AVG	<= 375 lb/d	all year
003	Solids, total suspended	MO AVG	<= 375 lb/d	all year
003	Solids, total suspended	DAILY MX	<= 751 lb/d	all year
003	Solids, total suspended	DAILY MX	<= 751 lb/d	all year
003	Oil & Grease	DAILY MX	report only	all year
003	Oil & Grease	DAILY MX	report only	all year
003	Nitrogen, total [as N]	DAILY MX	report only	all year
003	Nitrogen, total [as N]	DAILY MX	report only	all year
003	Nitrogen, ammonia total [as N]	MO AVG	<= .9 mg/L	Jun, Jul, Aug
003	Nitrogen, ammonia total [as N]	MO AVG	<= .9 mg/L	Jun, Jul, Aug
003	Nitrogen, ammonia total [as N]	MO AVG	<= 1.4 mg/L	Jan, Feb, Nov, Dec
003	Nitrogen, ammonia total [as N]	MO AVG	<= 1.4 mg/L	Jan, Feb, Nov, Dec
003	Nitrogen, ammonia total [as N]	MO AVG	<= 1.4 mg/L	Mar
003	Nitrogen, ammonia total [as N]	MO AVG	<= 1.4 mg/L	Mar
003	Nitrogen, ammonia total [as N]	MO AVG	<= .9 mg/L	Apr, May, Sep, Oct
003	Nitrogen, ammonia total [as N]	MO AVG	<= .9 mg/L	Apr, May, Sep, Oct
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 3 mg/L	Jun, Jul, Aug
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 3 mg/L	Jun, Jul, Aug
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 3.3 mg/L	Jan, Feb, Nov, Dec
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 3.3 mg/L	Jan, Feb, Nov, Dec
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 3.4 mg/L	Mar
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 3.4 mg/L	Mar
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 3 mg/L	Apr, May, Sep, Oct
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 3 mg/L	Apr, May, Sep, Oct
003	Nitrogen, ammonia total [as N]	MO AVG	<= 28 lb/d	Jun, Jul, Aug
003	Nitrogen, ammonia total [as N]	MO AVG	<= 28 lb/d	Jun, Jul, Aug
003	Nitrogen, ammonia total [as N]	MO AVG	<= 44 lb/d	Jan, Feb, Nov, Dec
003	Nitrogen, ammonia total [as N]	MO AVG	<= 44 lb/d	Jan, Feb, Nov, Dec
003	Nitrogen, ammonia total [as N]	MO AVG	<= 44 lb/d	Mar
003	Nitrogen, ammonia total [as N]	MO AVG	<= 44 lb/d	Mar
003	Nitrogen, ammonia total [as N]	MO AVG	<= 28 lb/d	Apr, May, Sep, Oct
003	Nitrogen, ammonia total [as N]	MO AVG	<= 28 lb/d	Apr, May, Sep, Oct
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 94 lb/d	Jun, Jul, Aug
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 94 lb/d	Jun, Jul, Aug
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 103 lb/d	Jan, Feb, Nov, Dec
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 103 lb/d	Jan, Feb, Nov, Dec
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 106 lb/d	Mar
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 106 lb/d	Mar
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 94 lb/d	Apr, May, Sep, Oct
003	Nitrogen, ammonia total [as N]	DAILY MX	<= 94 lb/d	Apr, May, Sep, Oct
003	Nitrogen, ammonia total [as N]	WKLY AVG	<= 2.8 mg/L	Jun, Jul, Aug
003	Nitrogen, ammonia total [as N]	WKLY AVG	<= 2.8 mg/L	Jun, Jul, Aug
003	Nitrogen, ammonia total [as N]	WKLY AVG	<= 88 lb/d	Jun, Jul, Aug
003	Nitrogen, ammonia total [as N]	WKLY AVG	<= 88 lb/d	Jun, Jul, Aug
003	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
003	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
003	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
003	Nitrite + Nitrate total [as N]	DAILY MX	report only	all year
003	Phosphorus, total [as P]	DAILY MX	report only	all year
003	Phosphorus, total [as P]	DAILY MX	report only	all year
003	Phosphorus, dissolved	DAILY MX	report only	all year
003	Phosphorus, dissolved	DAILY MX	report only	all year
003	Cyanide, total [as CN]	DAILY MX	report only	all year
003	Cyanide, total [as CN]	DAILY MX	report only	all year
003	Cyanide, free [amenable to chlorination]	DAILY MX	report only	all year
003	Cyanide, free [amenable to chlorination]	DAILY MX	report only	all year
003	Fluoride, total [as F]	DAILY MX	report only	all year
003	Fluoride, total [as F]	DAILY MX	report only	all year
003	Arsenic, total [as As]	DAILY MX	report only	all year
003	Arsenic, total [as As]	DAILY MX	report only	all year
003	Barium, total [as Ba]	DAILY MX	report only	all year
003	Barium, total [as Ba]	DAILY MX	report only	all year
003	Cadmium, total [as Cd]	DAILY MX	report only	all year
003	Cadmium, total [as Cd]	DAILY MX	report only	all year
003	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
003	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
003	Chromium, total [as Cr]	DAILY MX	report only	all year
003	Chromium, total [as Cr]	DAILY MX	report only	all year
003	Copper, total [as Cu]	DAILY MX	report only	all year
003	Copper, total [as Cu]	DAILY MX	report only	all year
003	Iron, total [as Fe]	DAILY MX	report only	all year
003	Iron, total [as Fe]	DAILY MX	report only	all year
003	Iron, dissolved [as Fe]	DAILY MX	report only	all year
003	Iron, dissolved [as Fe]	DAILY MX	report only	all year
003	Lead, total [as Pb]	DAILY MX	report only	all year
003	Lead, total [as Pb]	DAILY MX	report only	all year
003	Manganese, total [as Mn]	DAILY MX	report only	all year
003	Manganese, total [as Mn]	DAILY MX	report only	all year
003	Nickel, total [as Ni]	DAILY MX	report only	all year
003	Nickel, total [as Ni]	DAILY MX	report only	all year
003	Silver, total [as Ag]	DAILY MX	report only	all year
003	Silver, total [as Ag]	DAILY MX	report only	all year
003	Zinc, total [as Zn]	DAILY MX	report only	all year
003	Zinc, total [as Zn]	DAILY MX	report only	all year
003	Selenium, total [as Se]	DAILY MX	report only	all year
003	Selenium, total [as Se]	DAILY MX	report only	all year
003	Phenolics, total recoverable	DAILY MX	report only	all year
003	Phenolics, total recoverable	DAILY MX	report only	all year
003	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
003	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
003	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
003	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
003	Chlorine, total residual	DAILY MX	<= .05 mg/L	all year
003	Chlorine, total residual	DAILY MX	<= .05 mg/L	all year
003	Mercury, total [as Hg]	DAILY MX	report only	all year
003	Mercury, total [as Hg]	DAILY MX	report only	all year
003	Coliform, fecal general	DAILY MX	<= 400 #/100mL	May, Jun, Jul, Aug, Sep, Oct
003	Coliform, fecal general	DAILY MX	<= 400 #/100mL	May, Jun, Jul, Aug, Sep, Oct
003	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 10 mg/L	all year
003	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 10 mg/L	all year
003	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 20 mg/L	all year
003	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 20 mg/L	all year
003	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 313 lb/d	all year
003	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 313 lb/d	all year
003	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 626 lb/d	all year
003	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 626 lb/d	all year
INF	BOD, 5-day, 20 deg. C	MO AVG	report only	all year
INF	Solids, total suspended	MO AVG	report only	all year
INF	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
INF	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year