RIDGEWAY TOWN OF
NPDES ID: SC0022900
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: 2 effluent violations.
Violations
April 30, 2026
Copper, total [as Cu]
30% over limit
Discharged 0.005902 kg/d against a permitted limit of 0.00454 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
30% over limit
Discharged 0.013 mg/L against a permitted limit of 0.01 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Copper, total [as Cu]
60% over limit
Discharged 0.016 mg/L against a permitted limit of 0.01 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
23% over limit
Discharged 0.016 mg/L against a permitted limit of 0.013 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Copper, total [as Cu]
30% over limit
Discharged 0.013 mg/L against a permitted limit of 0.01 mg/L (MO AVG)
DMR, Limited - Numeric Violation
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia
28% over limit
Discharged 32 % against a permitted limit of 25 % (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Copper, total [as Cu]
50% over limit
Discharged 0.015 mg/L against a permitted limit of 0.01 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
20% over limit
Discharged 0.005448 kg/d against a permitted limit of 0.00454 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
15% over limit
Discharged 0.015 mg/L against a permitted limit of 0.013 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Copper, total [as Cu]
26% over limit
Discharged 0.0057204 kg/d against a permitted limit of 0.00454 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
60% over limit
Discharged 0.016 mg/L against a permitted limit of 0.01 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
23% over limit
Discharged 0.016 mg/L against a permitted limit of 0.013 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Solids, suspended percent removal
107% over limit
Discharged 69 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
30% over limit
Discharged 0.013 mg/L against a permitted limit of 0.01 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Copper, total [as Cu]
60% over limit
Discharged 0.016 mg/L against a permitted limit of 0.01 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
23% over limit
Discharged 0.016 mg/L against a permitted limit of 0.013 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia
36% over limit
Discharged 34 % against a permitted limit of 25 % (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Copper, total [as Cu]
30% over limit
Discharged 0.013 mg/L against a permitted limit of 0.01 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)