KEWANEE STP
NPDES ID: IL0029343
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: 3 effluent violations.
Violations
May 31, 2026
Chloride [as Cl]
15% over limit
Discharged 10848.32990885 kg/d against a permitted limit of 9465.89992046 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
24% over limit
Discharged 620 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Chloride [as Cl]
10% over limit
Discharged 550 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Chloride [as Cl]
50% over limit
Discharged 750 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
75% over limit
Discharged 16590.0678606 kg/d against a permitted limit of 9465.89992046 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Chloride [as Cl]
40% over limit
Discharged 700 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Chloride [as Cl]
52% over limit
Discharged 760 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Chloride [as Cl]
56% over limit
Discharged 780 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Chloride [as Cl]
30% over limit
Discharged 650 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Chloride [as Cl]
28% over limit
Discharged 640 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Chloride [as Cl]
58% over limit
Discharged 790 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Chloride [as Cl]
16% over limit
Discharged 580 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Chloride [as Cl]
16% over limit
Discharged 580 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Chloride [as Cl]
14% over limit
Discharged 570 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Chloride [as Cl]
8% over limit
Discharged 540 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Chloride [as Cl]
4% over limit
Discharged 520 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Chloride [as Cl]
120% over limit
Discharged 1100 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
34% over limit
Discharged 12650.25589371 kg/d against a permitted limit of 9465.89992046 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Chloride [as Cl]
10% over limit
Discharged 10370.26791286 kg/d against a permitted limit of 9465.89992046 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
48% over limit
Discharged 740 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Chloride [as Cl]
70% over limit
Discharged 850 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Chloride [as Cl]
76% over limit
Discharged 880 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Chloride [as Cl]
60% over limit
Discharged 800 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Chloride [as Cl]
50% over limit
Discharged 750 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Chloride [as Cl]
16% over limit
Discharged 580 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
Chloride [as Cl]
10% over limit
Discharged 550 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)