GALENA WWTF
NPDES ID: MO0107182
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
March 31, 2026
Nitrogen, ammonia total [as N]
46% over limit
Discharged 4.53 mg/L against a permitted limit of 3.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Phosphorus, total [as P]
44% over limit
Discharged 0.72 mg/L against a permitted limit of 0.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
326% over limit
Discharged 11.5 mg/L against a permitted limit of 2.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
14% over limit
Discharged 11.5 mg/L against a permitted limit of 10.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
104% over limit
Discharged 6.32 mg/L against a permitted limit of 3.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
3% over limit
Discharged 3.18 mg/L against a permitted limit of 3.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Toxicity [acute], Pimephales promelas [Fathead Minnow]
0% over limit
Discharged 1.41 toxic against a permitted limit of 0 toxic (DAILY MX)
DMR, Monitor Only - Overdue
Toxicity [acute], Ceriodaphnia dubia
0% over limit
Discharged 1.41 toxic against a permitted limit of 0 toxic (DAILY MX)
DMR, Monitor Only - Overdue
October 31, 2025
E. coli
Limit violation
Discharged 2420 MPN/100mL against a permitted limit of 206 MPN/100mL (30DA GM)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
564% over limit
Discharged 16.6 mg/L against a permitted limit of 2.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
37% over limit
Discharged 16.6 mg/L against a permitted limit of 12.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
74% over limit
Discharged 0.87 mg/L against a permitted limit of 0.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli
Limit violation
Discharged 2420 MPN/100mL against a permitted limit of 630 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
1144% over limit
Discharged 22.4 mg/L against a permitted limit of 1.8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
85% over limit
Discharged 22.4 mg/L against a permitted limit of 12.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Phosphorus, total [as P]
13% over limit
Discharged 0.567 mg/L against a permitted limit of 0.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
59% over limit
Discharged 4.3 mg/L against a permitted limit of 2.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Phosphorus, total [as P]
39% over limit
Discharged 0.694 mg/L against a permitted limit of 0.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
231% over limit
Discharged 8.93 mg/L against a permitted limit of 2.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Phosphorus, total [as P]
87% over limit
Discharged 0.936 mg/L against a permitted limit of 0.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)