DEQUEEN, CITY OF
NPDES ID: AR0021733
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 3 effluent violations.
Violations
May 31, 2026
Copper, total recoverable
41% over limit
Discharged 0.0172 mg/L against a permitted limit of 0.0122 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, nitrate total [as NO3]
6% over limit
Discharged 10.6 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Copper, total recoverable
13% over limit
Discharged 0.0138 mg/L against a permitted limit of 0.0122 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
0% over limit
Discharged 4.3 mg/L against a permitted limit of 7.5 mg/L (7 DA AVG)
DMR, Limited - Overdue
Nitrogen, nitrate total [as NO3]
0% over limit
Discharged 9.93 mg/L against a permitted limit of 15 mg/L (7 DA AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 3.1 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 34.77639971 kg/d against a permitted limit of 227.18159809 kg/d (MO AVG)
DMR, Limited - Overdue
Copper, total recoverable
0% over limit
Discharged 0.00941 mg/L against a permitted limit of 0.0122 mg/L (MO AVG)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.011 mg/L (INST MAX)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.314 mg/L against a permitted limit of 2 mg/L (7 DA AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 16.84339986 kg/d against a permitted limit of 75.72719936 kg/d (MO AVG)
DMR, Limited - Overdue
Copper, total recoverable
0% over limit
Discharged 0.00941 mg/L against a permitted limit of 0.0245 mg/L (7 DA AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.62 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Copper, total recoverable
0% over limit
Discharged 0.070824 kg/d against a permitted limit of 0.184778 kg/d (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 3.5 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 29.50999975 kg/d against a permitted limit of 151.45439873 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrogen, nitrate total [as NO3]
0% over limit
Discharged 8.2 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 2.58779998 kg/d against a permitted limit of 15.1636 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrogen, nitrate total [as NO3]
0% over limit
Discharged 78.95059934 kg/d against a permitted limit of 151.4544 kg/d (MO AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 4.16 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 4.66 mg/L against a permitted limit of 15 mg/L (7 DA AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 5.6 mg/L against a permitted limit of 22.5 mg/L (7 DA AVG)
DMR, Limited - Overdue
Overflow volume [SS0 volume, CSO volume]
0% over limit
Discharged 0 gal against a permitted limit of 0 gal (MO TOTAL)
DMR, Monitor Only - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 8.8 mg/L against a permitted limit of 8 mg/L (INST MIN)
DMR, Limited - Overdue
pH
0% over limit
Discharged 6.91 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
Coliform, fecal general
0% over limit
Discharged 1213 MPN/100mL against a permitted limit of 2000 MPN/100mL (7 DA GEO)
DMR, Limited - Overdue
Coliform, fecal general
0% over limit
Discharged 24.3 MPN/100mL against a permitted limit of 1000 MPN/100mL (30DA GEO)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.263 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Overdue
Overflows
0% over limit
Discharged 0 occur/d against a permitted limit of 0 occur/d (MO TOTAL)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 2.266 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 1.763 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Overdue
October 31, 2025
Nitrogen, ammonia total [as N]
8% over limit
Discharged 3.23 mg/L against a permitted limit of 3 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
45% over limit
Discharged 4.34 mg/L against a permitted limit of 3 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
February 28, 2025
BOD, carbonaceous [5 day, 20 C]
46% over limit
Discharged 21.84 mg/L against a permitted limit of 15 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Phosphorus, total [as P]
87% over limit
Discharged 28.42039976 kg/d against a permitted limit of 15.1636 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
129% over limit
Discharged 2.287 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
200% over limit
Discharged 6 mg/L against a permitted limit of 2 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Copper, total recoverable
17% over limit
Discharged 0.0143 mg/L against a permitted limit of 0.0122 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Copper, total recoverable
19% over limit
Discharged 0.0145 mg/L against a permitted limit of 0.0122 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Copper, total recoverable
32% over limit
Discharged 0.0161 mg/L against a permitted limit of 0.0122 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)