NPDES ID: IL0071285
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
This quarter: 4 effluent violations.
Violations
April 30, 2026
Zinc, total [as Zn]
86% over limit
Discharged 0.562 mg/L against a permitted limit of 0.3029 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Zinc, total [as Zn]
372% over limit
Discharged 1.43 mg/L against a permitted limit of 0.3029 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
79% over limit
Discharged 0.0872 mg/L against a permitted limit of 0.0486 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Chromium, total [as Cr]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Tin, total [as Sn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Mercury, total [as Hg]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Nickel, total [as Ni]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Antimony, total [as Sb]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Overdue
Silver, total [as Ag]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Cobalt, total [as Co]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Vanadium, total [as V]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Cyanide, total [as CN]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Organics, total toxic [TTO]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Overdue
Titanium, total [as Ti]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Cadmium, total [as Cd]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Lead, total [as Pb]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.3029 mg/L (DAILY MX)
DMR, Limited - Overdue
Oil & Grease
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0486 mg/L (DAILY MX)
DMR, Limited - Overdue
Arsenic, total [as As]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SEMI AVG)
DMR, Monitor Only - Overdue
October 31, 2025
Zinc, total [as Zn]
27% over limit
Discharged 0.386 mg/L against a permitted limit of 0.3029 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Zinc, total [as Zn]
94% over limit
Discharged 0.587 mg/L against a permitted limit of 0.3029 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Copper, total [as Cu]
43% over limit
Discharged 0.0694 mg/L against a permitted limit of 0.0486 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
163% over limit
Discharged 0.798 mg/L against a permitted limit of 0.3029 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Copper, total [as Cu]
42% over limit
Discharged 0.0692 mg/L against a permitted limit of 0.0486 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
89% over limit
Discharged 0.571 mg/L against a permitted limit of 0.3029 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Nickel, total [as Ni]
5% over limit
Discharged 0.214 mg/L against a permitted limit of 0.2043 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
1270% over limit
Discharged 4.15 mg/L against a permitted limit of 0.3029 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
416% over limit
Discharged 0.251 mg/L against a permitted limit of 0.0486 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Zinc, total [as Zn]
1032% over limit
Discharged 3.43 mg/L against a permitted limit of 0.3029 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
431% over limit
Discharged 0.258 mg/L against a permitted limit of 0.0486 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Copper, total [as Cu]
93% over limit
Discharged 0.0936 mg/L against a permitted limit of 0.0486 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
329% over limit
Discharged 1.3 mg/L against a permitted limit of 0.3029 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Zinc, total [as Zn]
527% over limit
Discharged 1.9 mg/L against a permitted limit of 0.3029 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Lead, total [as Pb]
16% over limit
Discharged 0.436 mg/L against a permitted limit of 0.3745 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
155% over limit
Discharged 0.124 mg/L against a permitted limit of 0.0486 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Zinc, total [as Zn]
19% over limit
Discharged 0.36 mg/L against a permitted limit of 0.3029 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
14% over limit
Discharged 0.0552 mg/L against a permitted limit of 0.0486 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)