WHEMCO STEEL CASTINGS INC
NPDES ID: PA0218081
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
This quarter: 12 effluent violations, 33 reporting violations.
Violations
May 31, 2026
Copper, total [as Cu]
200% over limit
Discharged 0.01362 kg/d against a permitted limit of 0.00454 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
150% over limit
Discharged 0.01816 kg/d against a permitted limit of 0.007264 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
368% over limit
Discharged 2.34 mg/L against a permitted limit of 0.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
70% over limit
Discharged 25.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
68% over limit
Discharged 2.69 mg/L against a permitted limit of 1.6 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
319% over limit
Discharged 0.13 mg/L against a permitted limit of 0.031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
192% over limit
Discharged 0.14 mg/L against a permitted limit of 0.048 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Copper, total [as Cu]
200% over limit
Discharged 0.01362 kg/d against a permitted limit of 0.00454 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
88% over limit
Discharged 0.01362 kg/d against a permitted limit of 0.007264 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
129% over limit
Discharged 0.11 mg/L against a permitted limit of 0.048 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
27% over limit
Discharged 19 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
255% over limit
Discharged 0.11 mg/L against a permitted limit of 0.031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Overdue
Temperature, water deg. fahrenheit
0% over limit
Discharged 0 deg F against a permitted limit of 110 deg F (INST MAX)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0 mg/L against a permitted limit of 3.4 mg/L (MO AVG)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (INST MAX)
DMR, Monitor Only - Overdue
Temperature, water deg. fahrenheit
0% over limit
Discharged 0 deg F against a permitted limit of 0 deg F (MO AVG)
DMR, Monitor Only - Overdue
Chloroform
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Oil & Grease
0% over limit
Discharged 0 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Dichlorobromomethane
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Dichlorobromomethane
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.275 mg/L (MO AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.428 mg/L (DAILY MX)
DMR, Limited - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.048 mg/L (DAILY MX)
DMR, Limited - Overdue
Chloroform
0% over limit
Discharged 0 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.040406 kg/d (MO AVG)
DMR, Limited - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.007264 kg/d (DAILY MX)
DMR, Limited - Overdue
Chloroform
0% over limit
Discharged 0 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.031 mg/L (MO AVG)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Oil & Grease
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Chloroform
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.00454 kg/d (MO AVG)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.06356 kg/d (DAILY MX)
DMR, Limited - Overdue
Oil & Grease
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.53118 kg/d (MO AVG)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0 mg/L against a permitted limit of 6.8 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 6 SU (INST MIN)
DMR, Limited - Overdue
February 28, 2026
Zinc, total [as Zn]
6% over limit
Discharged 0.042676 kg/d against a permitted limit of 0.040406 kg/d (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Copper, total [as Cu]
25% over limit
Discharged 0.00908 kg/d against a permitted limit of 0.007264 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
13% over limit
Discharged 0.035 mg/L against a permitted limit of 0.031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
6% over limit
Discharged 0.051 mg/L against a permitted limit of 0.048 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Copper, total [as Cu]
90% over limit
Discharged 0.059 mg/L against a permitted limit of 0.031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
100% over limit
Discharged 0.00908 kg/d against a permitted limit of 0.00454 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
25% over limit
Discharged 0.00908 kg/d against a permitted limit of 0.007264 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
46% over limit
Discharged 0.07 mg/L against a permitted limit of 0.048 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Copper, total [as Cu]
88% over limit
Discharged 0.01362 kg/d against a permitted limit of 0.007264 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
200% over limit
Discharged 0.01362 kg/d against a permitted limit of 0.00454 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
129% over limit
Discharged 0.11 mg/L against a permitted limit of 0.048 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
203% over limit
Discharged 0.094 mg/L against a permitted limit of 0.031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Copper, total [as Cu]
213% over limit
Discharged 0.0227 kg/d against a permitted limit of 0.007264 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
171% over limit
Discharged 0.13 mg/L against a permitted limit of 0.048 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
319% over limit
Discharged 0.13 mg/L against a permitted limit of 0.031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
400% over limit
Discharged 0.0227 kg/d against a permitted limit of 0.00454 kg/d (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Copper, total [as Cu]
200% over limit
Discharged 0.01362 kg/d against a permitted limit of 0.00454 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
73% over limit
Discharged 0.083 mg/L against a permitted limit of 0.048 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
88% over limit
Discharged 0.01362 kg/d against a permitted limit of 0.007264 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
168% over limit
Discharged 0.083 mg/L against a permitted limit of 0.031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Copper, total [as Cu]
88% over limit
Discharged 0.01362 kg/d against a permitted limit of 0.007264 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
203% over limit
Discharged 0.094 mg/L against a permitted limit of 0.031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
96% over limit
Discharged 0.094 mg/L against a permitted limit of 0.048 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
200% over limit
Discharged 0.01362 kg/d against a permitted limit of 0.00454 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
73% over limit
Discharged 26 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Copper, total [as Cu]
100% over limit
Discharged 0.00908 kg/d against a permitted limit of 0.00454 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
25% over limit
Discharged 0.00908 kg/d against a permitted limit of 0.007264 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
123% over limit
Discharged 0.069 mg/L against a permitted limit of 0.031 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
17% over limit
Discharged 17.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
63% over limit
Discharged 0.078 mg/L against a permitted limit of 0.048 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, total suspended
15% over limit
Discharged 17.3 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, total suspended
33% over limit
Discharged 20 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Solids, total suspended
33% over limit
Discharged 20 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total suspended
13% over limit
Discharged 17 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Solids, total suspended
5% over limit
Discharged 15.8 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Solids, total suspended
3% over limit
Discharged 15.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)