GALVA SOUTHWEST STP
NPDES ID: IL0023647
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: 6 effluent violations.
Violations
May 31, 2026
Nickel, total [as Ni]
163% over limit
Discharged 0.035 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nickel, total [as Ni]
73% over limit
Discharged 0.08626 kg/d against a permitted limit of 0.04994 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
148% over limit
Discharged 0.033 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nickel, total [as Ni]
329% over limit
Discharged 0.057 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
18% over limit
Discharged 0.05902 kg/d against a permitted limit of 0.04994 kg/d (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nickel, total [as Ni]
532% over limit
Discharged 0.084 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nickel, total [as Ni]
554% over limit
Discharged 0.087 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
18% over limit
Discharged 0.05902 kg/d against a permitted limit of 0.04994 kg/d (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nickel, total [as Ni]
802% over limit
Discharged 0.12 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
27% over limit
Discharged 0.06356 kg/d against a permitted limit of 0.04994 kg/d (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nickel, total [as Ni]
584% over limit
Discharged 0.091 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nickel, total [as Ni]
238% over limit
Discharged 0.045 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nickel, total [as Ni]
148% over limit
Discharged 0.033 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nickel, total [as Ni]
88% over limit
Discharged 0.025 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
10% over limit
Discharged 0.035 mg/L against a permitted limit of 0.0318 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
21% over limit
Discharged 0.064 mg/L against a permitted limit of 0.0527 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Nickel, total [as Ni]
84% over limit
Discharged 0.0245 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
2400% over limit
Discharged 9999 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
13% over limit
Discharged 5.2 mg/L against a permitted limit of 6 mg/L (MN WK AV)
DMR, Limited - Numeric Violation
June 30, 2025
Oxygen, dissolved [DO]
7% over limit
Discharged 5.6 mg/L against a permitted limit of 6 mg/L (MN WK AV)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
15% over limit
Discharged 0.057204 kg/d against a permitted limit of 0.04994 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
186% over limit
Discharged 0.038 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Nickel, total [as Ni]
201% over limit
Discharged 0.04 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nickel, total [as Ni]
374% over limit
Discharged 0.063 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
73% over limit
Discharged 0.08626 kg/d against a permitted limit of 0.04994 kg/d (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Copper, total [as Cu]
70% over limit
Discharged 0.054 mg/L against a permitted limit of 0.0318 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
1028% over limit
Discharged 0.15 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
255% over limit
Discharged 0.17706 kg/d against a permitted limit of 0.04994 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
14% over limit
Discharged 0.25 mg/L against a permitted limit of 0.2196 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
109% over limit
Discharged 0.11 mg/L against a permitted limit of 0.0527 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Nickel, total [as Ni]
105% over limit
Discharged 0.45 mg/L against a permitted limit of 0.2196 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
340% over limit
Discharged 0.14 mg/L against a permitted limit of 0.0318 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
2832% over limit
Discharged 0.39 mg/L against a permitted limit of 0.0133 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
318% over limit
Discharged 0.20884 kg/d against a permitted limit of 0.04994 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
223% over limit
Discharged 0.17 mg/L against a permitted limit of 0.0527 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Nickel, total [as Ni]
167% over limit
Discharged 0.14528 kg/d against a permitted limit of 0.05448 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
224% over limit
Discharged 0.11 mg/L against a permitted limit of 0.034 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
97% over limit
Discharged 0.46 mg/L against a permitted limit of 0.234 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
181% over limit
Discharged 0.16 mg/L against a permitted limit of 0.057 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
2186% over limit
Discharged 0.32 mg/L against a permitted limit of 0.014 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Copper, total [as Cu]
6% over limit
Discharged 0.036 mg/L against a permitted limit of 0.034 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
1257% over limit
Discharged 0.19 mg/L against a permitted limit of 0.014 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
8% over limit
Discharged 0.05902 kg/d against a permitted limit of 0.05448 kg/d (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Nickel, total [as Ni]
757% over limit
Discharged 0.12 mg/L against a permitted limit of 0.014 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Nickel, total [as Ni]
414% over limit
Discharged 0.072 mg/L against a permitted limit of 0.014 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Nickel, total [as Ni]
171% over limit
Discharged 0.038 mg/L against a permitted limit of 0.014 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Nickel, total [as Ni]
114% over limit
Discharged 0.03 mg/L against a permitted limit of 0.014 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)