MENDENHALL WWTP
NPDES ID: AK0022951
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 1 effluent violation.
Violations
April 30, 2026
Coliform, fecal general
188% over limit
Discharged 2300 MPN/100mL against a permitted limit of 800 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Copper, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.097 mg/L (DAILY MX)
DMR, Limited - Overdue
Coliform, fecal general
650% over limit
Discharged 6000 MPN/100mL against a permitted limit of 800 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 1.81599998 kg/d (DAILY MX)
DMR, Limited - Overdue
Copper, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.052 mg/L (MO AVG)
DMR, Limited - Overdue
Copper, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 0.95339999 kg/d (MO AVG)
DMR, Limited - Overdue
January 31, 2026
Flow, in conduit or thru treatment plant
9% over limit
Discharged 5.34 MGD against a permitted limit of 4.9 MGD (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
pH
0% over limit
Discharged 6.3 SU against a permitted limit of 6.5 SU (INST MIN)
DMR, Limited - Numeric Violation
April 30, 2025
BOD, carbonaceous [5 day, 20 C]
42% over limit
Discharged 78 mg/L against a permitted limit of 55 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
100% over limit
Discharged 120 mg/L against a permitted limit of 60 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal general
12400% over limit
Discharged 100000 MPN/100mL against a permitted limit of 800 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
60% over limit
Discharged 72 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
25% over limit
Discharged 50 mg/L against a permitted limit of 40 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Coliform, fecal general
88% over limit
Discharged 1500 MPN/100mL against a permitted limit of 800 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Solids, total suspended
153% over limit
Discharged 76 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
38% over limit
Discharged 1100 MPN/100mL against a permitted limit of 800 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
142% over limit
Discharged 109 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
40% over limit
Discharged 56 mg/L against a permitted limit of 40 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 1.81599998 kg/d (DAILY MX)
DMR, Limited - Overdue
Copper, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.052 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
18% over limit
Discharged 65 mg/L against a permitted limit of 55 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal general
34% over limit
Discharged 267 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
80% over limit
Discharged 45 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.097 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
4% over limit
Discharged 577.03399515 kg/d against a permitted limit of 556.60399532 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
1% over limit
Discharged 405 MPN/100mL against a permitted limit of 400 MPN/100mL (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
97% over limit
Discharged 118 mg/L against a permitted limit of 60 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
14% over limit
Discharged 82.9 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Numeric Violation
Copper, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 0.95339999 kg/d (MO AVG)
DMR, Limited - Overdue
October 31, 2024
Solids, total suspended
84% over limit
Discharged 83 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
4% over limit
Discharged 1156.79199028 kg/d against a permitted limit of 1113.20799065 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 0.63559999 kg/d (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
100% over limit
Discharged 120 mg/L against a permitted limit of 60 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.034 mg/L (MO AVG)
DMR, Limited - Overdue
Copper, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.054 mg/L (DAILY MX)
DMR, Limited - Overdue
Copper, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 0.99879999 kg/d (DAILY MX)
DMR, Limited - Overdue
September 30, 2024
Coliform, fecal general
38% over limit
Discharged 1100 MPN/100mL against a permitted limit of 800 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
48% over limit
Discharged 89 mg/L against a permitted limit of 60 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
12% over limit
Discharged 33.7 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
23% over limit
Discharged 55.3 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Solids, total suspended
40% over limit
Discharged 42 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
8% over limit
Discharged 65 mg/L against a permitted limit of 60 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal general
3775% over limit
Discharged 31000 MPN/100mL against a permitted limit of 800 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
19% over limit
Discharged 53.7 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Solids, total suspended
27% over limit
Discharged 76 mg/L against a permitted limit of 60 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)