SMITHFIELD STP, VILLAGE OF
NPDES ID: ILG580249
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 3 effluent violations.
Violations
May 31, 2026
Oxygen, dissolved [DO]
46% over limit
Discharged 3.22 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Solids, total suspended
49% over limit
Discharged 55 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
33% over limit
Discharged 60 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
46% over limit
Discharged 54 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
24% over limit
Discharged 56 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Oxygen, dissolved [DO]
18% over limit
Discharged 4.9 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
August 31, 2025
Oxygen, dissolved [DO]
71% over limit
Discharged 1.75 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
July 31, 2025
Solids, total suspended
11% over limit
Discharged 41 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Oxygen, dissolved [DO]
46% over limit
Discharged 3.25 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
May 31, 2025
Solids, total suspended
91% over limit
Discharged 86 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
89% over limit
Discharged 70 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
56% over limit
Discharged 2.62 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
April 30, 2025
Oxygen, dissolved [DO]
38% over limit
Discharged 3.7 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Solids, total suspended
20% over limit
Discharged 54 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
14% over limit
Discharged 42 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, total suspended
78% over limit
Discharged 80 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
Oxygen, dissolved [DO]
50% over limit
Discharged 3.02 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
Solids, total suspended
86% over limit
Discharged 69 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Oxygen, dissolved [DO]
29% over limit
Discharged 4.25 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
December 31, 2024
Oxygen, dissolved [DO]
24% over limit
Discharged 4.55 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
November 30, 2024
Oxygen, dissolved [DO]
56% over limit
Discharged 2.66 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
October 31, 2024
Oxygen, dissolved [DO]
57% over limit
Discharged 2.6 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
September 30, 2024
Oxygen, dissolved [DO]
83% over limit
Discharged 1.04 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
August 31, 2024
Oxygen, dissolved [DO]
91% over limit
Discharged 0.55 mg/L against a permitted limit of 6 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)