SPRINGERTON STP, VILLAGE OF
NPDES ID: IL0054496
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: 2 effluent violations.
Violations
April 30, 2026
Nitrogen, ammonia total [as N]
48% over limit
Discharged 7.85 mg/L against a permitted limit of 5.3 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
336% over limit
Discharged 7.85 mg/L against a permitted limit of 1.8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
986% over limit
Discharged 22.8 mg/L against a permitted limit of 2.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
7% over limit
Discharged 0.68099999 kg/d against a permitted limit of 0.63559999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
88% over limit
Discharged 22.8 mg/L against a permitted limit of 12.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
330% over limit
Discharged 22.8 mg/L against a permitted limit of 5.3 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Oxygen, dissolved [DO]
69% over limit
Discharged 1.1 mg/L against a permitted limit of 3.5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
73% over limit
Discharged 1.1 mg/L against a permitted limit of 4 mg/L (MN WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
409% over limit
Discharged 57.5 mg/L against a permitted limit of 11.3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
100% over limit
Discharged 50 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
80% over limit
Discharged 1.1 mg/L against a permitted limit of 5.5 mg/L (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
5% over limit
Discharged 1.48003999 kg/d against a permitted limit of 1.40739999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1150% over limit
Discharged 57.5 mg/L against a permitted limit of 4.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
25% over limit
Discharged 50 mg/L against a permitted limit of 40 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
166% over limit
Discharged 27.9 mg/L against a permitted limit of 10.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
2% over limit
Discharged 4.9 mg/L against a permitted limit of 5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
564% over limit
Discharged 27.9 mg/L against a permitted limit of 4.2 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
18% over limit
Discharged 4.9 mg/L against a permitted limit of 6 mg/L (MN WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1541% over limit
Discharged 27.9 mg/L against a permitted limit of 1.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Oxygen, dissolved [DO]
16% over limit
Discharged 5.05 mg/L against a permitted limit of 6 mg/L (MN WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
327% over limit
Discharged 2.13379998 kg/d against a permitted limit of 0.4994 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
876% over limit
Discharged 16.6 mg/L against a permitted limit of 1.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
68% over limit
Discharged 2.13379998 kg/d against a permitted limit of 1.27119999 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
295% over limit
Discharged 16.6 mg/L against a permitted limit of 4.2 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
58% over limit
Discharged 16.6 mg/L against a permitted limit of 10.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
400% over limit
Discharged 9 mg/L against a permitted limit of 1.8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
70% over limit
Discharged 9 mg/L against a permitted limit of 5.3 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
August 31, 2024
BOD, carbonaceous [5 day, 20 C]
29% over limit
Discharged 9.98799992 kg/d against a permitted limit of 7.71799994 kg/d (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)