METRO WATER RECLAMATION DISTRICT OF GREATER CHICAGO — NPDES permit IL0036137: limits, due date and EPA's record

NPDES permit IL0036137 · Major POTW · administratively continued, expires 2026-04-30 · EPA's file as of 2026-09-19

This permit expired on 2026-04-30 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 (read off this permit's own late-day counts in EPA's filings).

Limits in force (155)

Outfall	Parameter	Statistic	Limit	Months
005	BOD, 5-day, 20 deg. C	DAILY MX	report only	all year
005	Solids, total suspended	DAILY MX	report only	all year
005	Coliform, fecal general	DAILY MX	report only	all year
005	Flow	MO TOTAL	report only	all year
007	Temperature, water deg. fahrenheit	MO MAX	report only	all year
007	Oxygen, dissolved [DO]	MO AV MN	>= 5.5 mg/L	Jan, Feb, Aug, Sep, Oct, Nov, Dec
007	Oxygen, dissolved [DO]	MN WK AV	>= 6 mg/L	Mar, Apr, May, Jun, Jul
007	Oxygen, dissolved [DO]	MN WK AV	>= 4 mg/L	Jan, Feb, Aug, Sep, Oct, Nov, Dec
007	Oxygen, dissolved [DO]	DAILY MN	>= 5 mg/L	Mar, Apr, May, Jun, Jul
007	Oxygen, dissolved [DO]	DAILY MN	>= 3.5 mg/L	Jan, Feb, Aug, Sep, Oct, Nov, Dec
007	pH	MINIMUM	>= 6 SU	all year
007	pH	MAXIMUM	<= 9 SU	all year
007	Alkalinity, total [as CaCO3]	DAILY MX	report only	all year
007	Solids, total suspended	MO AVG	<= 12 mg/L	all year
007	Solids, total suspended	DAILY MX	<= 24 mg/L	all year
007	Solids, total suspended	MO AVG	<= 2202 lb/d	all year
007	Solids, total suspended	DAILY MX	<= 4404 lb/d	all year
007	Oil & Grease	DAILY MX	report only	all year
007	Oil & Grease	DAILY MX	report only	all year
007	Nitrogen, total [as N]	MO AVG	report only	all year
007	Nitrogen, total [as N]	DAILY MX	report only	all year
007	Nitrogen, ammonia total [as N]	MO AVG	<= 1.5 mg/L	Apr, May, Sep, Oct
007	Nitrogen, ammonia total [as N]	MO AVG	<= 1.5 mg/L	Jun, Jul, Aug
007	Nitrogen, ammonia total [as N]	MO AVG	<= 3.9 mg/L	Jan, Feb, Nov, Dec
007	Nitrogen, ammonia total [as N]	MO AVG	<= 2.9 mg/L	Mar
007	Nitrogen, ammonia total [as N]	DAILY MX	<= 6.5 mg/L	Apr, May, Sep, Oct
007	Nitrogen, ammonia total [as N]	DAILY MX	<= 6.5 mg/L	Jun, Jul, Aug
007	Nitrogen, ammonia total [as N]	DAILY MX	<= 11.5 mg/L	Jan, Feb, Nov, Dec
007	Nitrogen, ammonia total [as N]	DAILY MX	<= 13.3 mg/L	Mar
007	Nitrogen, ammonia total [as N]	MO AVG	<= 275 lb/d	Apr, May, Sep, Oct
007	Nitrogen, ammonia total [as N]	MO AVG	<= 275 lb/d	Jun, Jul, Aug
007	Nitrogen, ammonia total [as N]	MO AVG	<= 716 lb/d	Jan, Feb, Nov, Dec
007	Nitrogen, ammonia total [as N]	MO AVG	<= 532 lb/d	Mar
007	Nitrogen, ammonia total [as N]	DAILY MX	<= 1193 lb/d	Apr, May, Sep, Oct
007	Nitrogen, ammonia total [as N]	DAILY MX	<= 1193 lb/d	Jun, Jul, Aug
007	Nitrogen, ammonia total [as N]	DAILY MX	<= 2110 lb/d	Jan, Feb, Nov, Dec
007	Nitrogen, ammonia total [as N]	DAILY MX	<= 2440 lb/d	Mar
007	Nitrogen, ammonia total [as N]	WKLY AVG	<= 3.8 mg/L	Jun, Jul, Aug
007	Nitrogen, ammonia total [as N]	WKLY AVG	<= 7.4 mg/L	Mar
007	Nitrogen, ammonia total [as N]	WKLY AVG	<= 697 lb/d	Jun, Jul, Aug
007	Nitrogen, ammonia total [as N]	WKLY AVG	<= 1358 lb/d	Mar
007	Nitrogen, nitrate total [as N]	DAILY MX	report only	all year
007	Nitrogen, Kjeldahl, total [as N]	DAILY MX	report only	all year
007	Phosphorus, total [as P]	MO AVG	report only	all year
007	Phosphorus, total [as P]	DAILY MX	report only	all year
007	Phosphorus, dissolved	DAILY MX	report only	all year
007	Cyanide, total [as CN]	DAILY MX	report only	all year
007	Cyanide, total [as CN]	DAILY MX	report only	all year
007	Cyanide, free [amenable to chlorination]	DAILY MX	report only	all year
007	Cyanide, free [amenable to chlorination]	DAILY MX	report only	all year
007	Chloride [as Cl]	DAILY MX	report only	all year
007	Fluoride, total [as F]	DAILY MX	report only	all year
007	Fluoride, total [as F]	DAILY MX	report only	all year
007	Arsenic, total [as As]	DAILY MX	report only	all year
007	Arsenic, total [as As]	DAILY MX	report only	all year
007	Barium, total [as Ba]	DAILY MX	report only	all year
007	Barium, total [as Ba]	DAILY MX	report only	all year
007	Beryllium, total [as Be]	DAILY MX	report only	all year
007	Beryllium, total [as Be]	DAILY MX	report only	all year
007	Cadmium, total [as Cd]	DAILY MX	report only	all year
007	Cadmium, total [as Cd]	DAILY MX	report only	all year
007	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
007	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
007	Chromium, total [as Cr]	DAILY MX	report only	all year
007	Chromium, total [as Cr]	DAILY MX	report only	all year
007	Copper, total [as Cu]	DAILY MX	report only	all year
007	Copper, total [as Cu]	DAILY MX	report only	all year
007	Iron, total [as Fe]	DAILY MX	report only	all year
007	Iron, total [as Fe]	DAILY MX	report only	all year
007	Iron, dissolved [as Fe]	DAILY MX	report only	all year
007	Iron, dissolved [as Fe]	DAILY MX	report only	all year
007	Lead, total [as Pb]	DAILY MX	report only	all year
007	Lead, total [as Pb]	DAILY MX	report only	all year
007	Manganese, total [as Mn]	DAILY MX	report only	all year
007	Manganese, total [as Mn]	DAILY MX	report only	all year
007	Thallium, total [as Tl]	DAILY MX	report only	all year
007	Thallium, total [as Tl]	DAILY MX	report only	all year
007	Nickel, total [as Ni]	DAILY MX	report only	all year
007	Nickel, total [as Ni]	DAILY MX	report only	all year
007	Silver, total [as Ag]	DAILY MX	report only	all year
007	Silver, total [as Ag]	DAILY MX	report only	all year
007	Zinc, total [as Zn]	DAILY MX	report only	all year
007	Zinc, total [as Zn]	DAILY MX	report only	all year
007	Antimony, total [as Sb]	DAILY MX	report only	all year
007	Antimony, total [as Sb]	DAILY MX	report only	all year
007	Selenium, total [as Se]	DAILY MX	report only	all year
007	Selenium, total [as Se]	DAILY MX	report only	all year
007	Coliform, fecal - % samples exceeding limit	MAXIMUM	<= 10 %	May, Jun, Jul, Aug, Sep, Oct
007	Phenolics, total recoverable	DAILY MX	report only	all year
007	Phenolics, total recoverable	DAILY MX	report only	all year
007	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
007	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
007	Chlorine, total residual	DAILY MX	<= .038 mg/L	Jan, Feb, Mar, Apr, Nov, Dec
007	Chlorine, total residual	DAILY MX	report only	May, Jun, Jul, Aug, Sep, Oct
007	Mercury, total [as Hg]	DAILY MX	report only	all year
007	Mercury, total [as Hg]	DAILY MX	report only	all year
007	Coliform, fecal general	GEO MEAN	<= 200 #/100mL	May, Jun, Jul, Aug, Sep, Oct
007	Coliform, fecal general	DAILY MX	report only	May, Jun, Jul, Aug, Sep, Oct
007	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 10 mg/L	all year
007	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 20 mg/L	all year
007	BOD, carbonaceous [5 day, 20 C]	MO AVG	<= 1835 lb/d	all year
007	BOD, carbonaceous [5 day, 20 C]	DAILY MX	<= 3670 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	Nitrogen, total [as N]	DAILY MX	report only	all year
INF	Phosphorus, total [as P]	DAILY MX	report only	all year
INF	Carbon, tot organic [TOC]	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
INFL	Oil & Grease	DAILY MX	report only	all year
INFL	Oil & Grease	DAILY MX	report only	all year
INFL	Cyanide, total [as CN]	DAILY MX	report only	all year
INFL	Cyanide, total [as CN]	DAILY MX	report only	all year
INFL	Cyanide, free [amenable to chlorination]	DAILY MX	report only	all year
INFL	Cyanide, free [amenable to chlorination]	DAILY MX	report only	all year
INFL	Fluoride, total [as F]	DAILY MX	report only	all year
INFL	Fluoride, total [as F]	DAILY MX	report only	all year
INFL	Arsenic, total [as As]	DAILY MX	report only	all year
INFL	Arsenic, total [as As]	DAILY MX	report only	all year
INFL	Barium, total [as Ba]	DAILY MX	report only	all year
INFL	Barium, total [as Ba]	DAILY MX	report only	all year
INFL	Beryllium, total [as Be]	DAILY MX	report only	all year
INFL	Beryllium, total [as Be]	DAILY MX	report only	all year
INFL	Cadmium, total [as Cd]	DAILY MX	report only	all year
INFL	Cadmium, total [as Cd]	DAILY MX	report only	all year
INFL	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
INFL	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
INFL	Chromium, total [as Cr]	DAILY MX	report only	all year
INFL	Chromium, total [as Cr]	DAILY MX	report only	all year
INFL	Copper, total [as Cu]	DAILY MX	report only	all year
INFL	Copper, total [as Cu]	DAILY MX	report only	all year
INFL	Iron, total [as Fe]	DAILY MX	report only	all year
INFL	Iron, total [as Fe]	DAILY MX	report only	all year
INFL	Iron, dissolved [as Fe]	DAILY MX	report only	all year
INFL	Iron, dissolved [as Fe]	DAILY MX	report only	all year
INFL	Lead, total [as Pb]	DAILY MX	report only	all year
INFL	Lead, total [as Pb]	DAILY MX	report only	all year
INFL	Manganese, total [as Mn]	DAILY MX	report only	all year
INFL	Manganese, total [as Mn]	DAILY MX	report only	all year
INFL	Thallium, total [as Tl]	DAILY MX	report only	all year
INFL	Thallium, total [as Tl]	DAILY MX	report only	all year
INFL	Nickel, total [as Ni]	DAILY MX	report only	all year
INFL	Nickel, total [as Ni]	DAILY MX	report only	all year
INFL	Silver, total [as Ag]	DAILY MX	report only	all year
INFL	Silver, total [as Ag]	DAILY MX	report only	all year
INFL	Zinc, total [as Zn]	DAILY MX	report only	all year
INFL	Zinc, total [as Zn]	DAILY MX	report only	all year
INFL	Antimony, total [as Sb]	DAILY MX	report only	all year
INFL	Antimony, total [as Sb]	DAILY MX	report only	all year
INFL	Selenium, total [as Se]	DAILY MX	report only	all year
INFL	Selenium, total [as Se]	DAILY MX	report only	all year
INFL	Phenolics, total recoverable	DAILY MX	report only	all year
INFL	Phenolics, total recoverable	DAILY MX	report only	all year
INFL	Mercury, total [as Hg]	DAILY MX	report only	all year
INFL	Mercury, total [as Hg]	DAILY MX	report only	all year