IRVING STP, VILLAGE OF
NPDES ID: IL0053881
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: 8 effluent violations, 2 reporting violations.
Violations
May 31, 2026
Oxygen, dissolved [DO]
38% over limit
Discharged 3.11 mg/L against a permitted limit of 5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
48% over limit
Discharged 3.11 mg/L against a permitted limit of 6 mg/L (MN WK AV)
DMR, Limited - Numeric Violation
April 30, 2026
Solids, total suspended
51% over limit
Discharged 56 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
62% over limit
Discharged 2.26 mg/L against a permitted limit of 6 mg/L (MN WK AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.4 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
0% over limit
Discharged 0 kg/d against a permitted limit of 2.86019998 kg/d (MO AVG)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
55% over limit
Discharged 2.26 mg/L against a permitted limit of 5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Solids, total suspended
15% over limit
Discharged 30.36351974 kg/d against a permitted limit of 26.33199978 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
24% over limit
Discharged 56 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
March 31, 2026
pH
0% over limit
Discharged 9.2 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
32% over limit
Discharged 3.42 mg/L against a permitted limit of 5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Solids, total suspended
8% over limit
Discharged 40 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
43% over limit
Discharged 3.42 mg/L against a permitted limit of 6 mg/L (MN WK AV)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
70% over limit
Discharged 44.64635962 kg/d against a permitted limit of 26.33199978 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
40% over limit
Discharged 44.64635962 kg/d against a permitted limit of 31.77999973 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
122% over limit
Discharged 82 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
82% over limit
Discharged 82 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.2 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
8% over limit
Discharged 27 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Oxygen, dissolved [DO]
64% over limit
Discharged 1.8 mg/L against a permitted limit of 5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
70% over limit
Discharged 1.8 mg/L against a permitted limit of 6 mg/L (MN WK AV)
DMR, Limited - Numeric Violation
May 31, 2025
Oxygen, dissolved [DO]
63% over limit
Discharged 2.2 mg/L against a permitted limit of 6 mg/L (MN WK AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
56% over limit
Discharged 2.2 mg/L against a permitted limit of 5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
November 30, 2024
Phosphorus, total [as P]
70% over limit
Discharged 4.85779996 kg/d against a permitted limit of 2.86019998 kg/d (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Solids, total suspended
47% over limit
Discharged 66 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
24% over limit
Discharged 4.2 mg/L against a permitted limit of 5.5 mg/L (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total suspended
78% over limit
Discharged 66 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Oxygen, dissolved [DO]
40% over limit
Discharged 3.3 mg/L against a permitted limit of 5.5 mg/L (MO AV MN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
6% over limit
Discharged 3.3 mg/L against a permitted limit of 3.5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
18% over limit
Discharged 3.3 mg/L against a permitted limit of 4 mg/L (MN WK AV)
DMR, Limited - Numeric Violation
August 31, 2024
Oxygen, dissolved [DO]
58% over limit
Discharged 2.3 mg/L against a permitted limit of 5.5 mg/L (MO AV MN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
43% over limit
Discharged 2.3 mg/L against a permitted limit of 4 mg/L (MN WK AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
34% over limit
Discharged 2.3 mg/L against a permitted limit of 3.5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)