VALLEY MATERIAL COMPANY
NPDES ID: MOG490332
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: 3 effluent violations, 2 single-event violations.
Violations
June 30, 2026
Solids, total suspended
1% over limit
Discharged 71 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
1% over limit
Discharged 71 mg/L against a permitted limit of 70 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 11.5 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
93% over limit
Discharged 135 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
93% over limit
Discharged 135 mg/L against a permitted limit of 70 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 12.31 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
December 31, 2025
pH
0% over limit
Discharged 11.8 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
pH
0% over limit
Discharged 11.8 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
Solids, total suspended
169% over limit
Discharged 188 mg/L against a permitted limit of 70 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
169% over limit
Discharged 188 mg/L against a permitted limit of 70 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, settleable
0% over limit
Discharged 0.0001 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, settleable
0% over limit
Discharged 0.0001 mg/L against a permitted limit of 0.0015 mg/L (DAILY MX)
DMR, Limited - Overdue
Oil and grease [soxhlet extr.] tot.
0% over limit
Discharged 5 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Overdue
Oil and grease [soxhlet extr.] tot.
0% over limit
Discharged 5 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 11.8 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.009648 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.009648 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
169% over limit
Discharged 188 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
169% over limit
Discharged 188 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
pH
0% over limit
Discharged 11.6 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
June 30, 2025
Solids, total suspended
34% over limit
Discharged 94 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 12.3 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
Solids, total suspended
34% over limit
Discharged 94 mg/L against a permitted limit of 70 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, settleable
100% over limit
Discharged 0.002 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, settleable
33% over limit
Discharged 0.002 mg/L against a permitted limit of 0.0015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 12.3 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
Solids, total suspended
399% over limit
Discharged 349 mg/L against a permitted limit of 70 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
399% over limit
Discharged 349 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oil and grease [soxhlet extr.] tot.
30% over limit
Discharged 13 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total suspended
629% over limit
Discharged 510 mg/L against a permitted limit of 70 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
629% over limit
Discharged 510 mg/L against a permitted limit of 70 mg/L (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 11.6 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
September 30, 2024
pH
0% over limit
Discharged 9.5 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)