COMPTON RIDGE WWTP
NPDES ID: MO0122866
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: 5 effluent violations.
Violations
June 30, 2026
Solids, total suspended
910% over limit
Discharged 202 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
160% over limit
Discharged 3.64 mg/L against a permitted limit of 1.4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
122% over limit
Discharged 1.11 mg/L against a permitted limit of 0.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
521% over limit
Discharged 6.9 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total suspended
573% over limit
Discharged 202 mg/L against a permitted limit of 30 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
48% over limit
Discharged 4.3 mg/L against a permitted limit of 2.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
25% over limit
Discharged 25 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.5 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 3.8 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 1.4 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (WKLY AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (WKLY AVG)
DMR, Limited - Overdue
BOD, 20-day, percent removal
0% over limit
Discharged 0 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
Solids, suspended percent removal
0% over limit
Discharged 0 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
June 30, 2025
E. coli
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 630 MPN/100mL (7 DA GEO)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Phosphorus, total [as P]
158% over limit
Discharged 1.29 mg/L against a permitted limit of 0.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 126 MPN/100mL (30DA GM)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
March 31, 2025
Aluminum, total recoverable
211% over limit
Discharged 2.33000011 mg/L against a permitted limit of 0.75000004 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
581% over limit
Discharged 2.33000011 mg/L against a permitted limit of 0.34200002 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Aluminum, total recoverable
617% over limit
Discharged 2.45152912 mg/L against a permitted limit of 0.34200002 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
227% over limit
Discharged 2.45152912 mg/L against a permitted limit of 0.75000004 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
26% over limit
Discharged 0.63 mg/L against a permitted limit of 0.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Nitrogen, ammonia total [as N]
92% over limit
Discharged 2.69 mg/L against a permitted limit of 1.4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
492% over limit
Discharged 2.0242951 mg/L against a permitted limit of 0.34200002 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
170% over limit
Discharged 2.0242951 mg/L against a permitted limit of 0.75000004 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 17, 2026 (6 hours ago)