DUNKIRK WWTP
NPDES ID: IN0021491
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 4 effluent violations.
Violations
May 31, 2026
Solids, total suspended
13% over limit
Discharged 44.91875962 kg/d against a permitted limit of 39.7704 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Chloride [as Cl]
33% over limit
Discharged 456.8 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Chloride [as Cl]
29% over limit
Discharged 443 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
2% over limit
Discharged 704 mg/L against a permitted limit of 690 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Chloride [as Cl]
44% over limit
Discharged 496.4 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
1% over limit
Discharged 5.65683995 kg/d against a permitted limit of 5.5842 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
57% over limit
Discharged 3.303 mg/L against a permitted limit of 2.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
197% over limit
Discharged 9.507 mg/L against a permitted limit of 3.2 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
97% over limit
Discharged 16.75032986 kg/d against a permitted limit of 8.4898 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Chloride [as Cl]
23% over limit
Discharged 423 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Chloride [as Cl]
46% over limit
Discharged 501.5 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Chloride [as Cl]
69% over limit
Discharged 580 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Chloride [as Cl]
84% over limit
Discharged 632 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
3% over limit
Discharged 709 mg/L against a permitted limit of 690 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Chloride [as Cl]
7% over limit
Discharged 738 mg/L against a permitted limit of 690 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
95% over limit
Discharged 670.8 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Chloride [as Cl]
63% over limit
Discharged 561.6 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Chloride [as Cl]
51% over limit
Discharged 518.8 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Chloride [as Cl]
4% over limit
Discharged 357.8 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Chloride [as Cl]
52% over limit
Discharged 524.5 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
8% over limit
Discharged 1.08 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Chloride [as Cl]
46% over limit
Discharged 503 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, total suspended
12% over limit
Discharged 80.31259933 kg/d against a permitted limit of 71.5958 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
March 31, 2025
Chloride [as Cl]
7% over limit
Discharged 368 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Chloride [as Cl]
24% over limit
Discharged 425.8 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Phosphorus, total [as P]
11% over limit
Discharged 1.112 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Chloride [as Cl]
14% over limit
Discharged 393.4 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Chloride [as Cl]
25% over limit
Discharged 431.5 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Chloride [as Cl]
45% over limit
Discharged 497.8 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Chloride [as Cl]
79% over limit
Discharged 616.8 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
14% over limit
Discharged 787 mg/L against a permitted limit of 690 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Chloride [as Cl]
17% over limit
Discharged 810 mg/L against a permitted limit of 690 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
100% over limit
Discharged 688 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Chloride [as Cl]
78% over limit
Discharged 613.6 mg/L against a permitted limit of 344 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
5% over limit
Discharged 724 mg/L against a permitted limit of 690 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)