HUNTER ENGINEERING COMPANY, RAYMOND
NPDES ID: MSP090222
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.
Violations
April 30, 2026
Silver total recoverable
32% over limit
Discharged 0.0014982 kg/d against a permitted limit of 0.001135 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Silver total recoverable
540% over limit
Discharged 0.064 mg/L against a permitted limit of 0.01 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Silver total recoverable
220% over limit
Discharged 0.064 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Silver total recoverable
55% over limit
Discharged 0.0155 mg/L against a permitted limit of 0.01 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Silver total recoverable
100% over limit
Discharged 0.02 mg/L against a permitted limit of 0.01 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Silver total recoverable
50% over limit
Discharged 0.03 mg/L against a permitted limit of 0.02 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
pH
0% over limit
Discharged 9.7 SU against a permitted limit of 9.5 SU (MAXIMUM)
DMR, Limited - Numeric Violation
January 31, 2025
pH
0% over limit
Discharged 9.76 SU against a permitted limit of 9.5 SU (MAXIMUM)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)