ABERDEEN, CITY OF - ABERDEEN WWTP
NPDES ID: ID0020176
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
Violations
July 31, 2025
E. coli, MTEC-MF
176% over limit
Discharged 1119.9 MPN/100mL against a permitted limit of 406 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
June 30, 2025
E. coli, MTEC-MF
141% over limit
Discharged 980.4 MPN/100mL against a permitted limit of 406 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
34% over limit
Discharged 168.8 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
May 31, 2025
E. coli, MTEC-MF
496% over limit
Discharged 2419.2 MPN/100mL against a permitted limit of 406 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
23% over limit
Discharged 155 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
April 30, 2025
E. coli, MTEC-MF
496% over limit
Discharged 2419.2 MPN/100mL against a permitted limit of 406 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
509% over limit
Discharged 767 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
February 28, 2025
E. coli, MTEC-MF
496% over limit
Discharged 2419.2 MPN/100mL against a permitted limit of 406 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
August 31, 2024
E. coli, MTEC-MF
496% over limit
Discharged 2419.2 MPN/100mL against a permitted limit of 406 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
July 31, 2024
E. coli, MTEC-MF
496% over limit
Discharged 2419.2 MPN/100mL against a permitted limit of 406 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
1820% over limit
Discharged 2419.2 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
4% over limit
Discharged 47 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
17% over limit
Discharged 35 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)