MANSFIELD, CITY OF (MANSFIELD WPCP)
NPDES ID: GA0047759
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
Violations
March 31, 2026
Nitrogen, ammonia total [as N]
74% over limit
Discharged 20.9 mg/L against a permitted limit of 12 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
14% over limit
Discharged 9.1 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
36% over limit
Discharged 3.08719997 kg/d against a permitted limit of 2.26999998 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
21% over limit
Discharged 36.3 mg/L against a permitted limit of 30 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
24% over limit
Discharged 2.81479998 kg/d against a permitted limit of 2.26999998 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
54% over limit
Discharged 18.5 mg/L against a permitted limit of 12 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
4% over limit
Discharged 20.7 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
9% over limit
Discharged 6.17439995 kg/d against a permitted limit of 5.67499995 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
36% over limit
Discharged 40.8 mg/L against a permitted limit of 30 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
29% over limit
Discharged 10.3 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Flow, in conduit or thru treatment plant
33% over limit
Discharged 0.1 MGD against a permitted limit of 0.075 MGD (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
40% over limit
Discharged 7.94499993 kg/d against a permitted limit of 5.67499995 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
28% over limit
Discharged 0.077 MGD against a permitted limit of 0.06 MGD (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
8% over limit
Discharged 1.95219998 kg/d against a permitted limit of 1.81599998 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
1% over limit
Discharged 5.72039995 kg/d against a permitted limit of 5.67499995 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Flow, in conduit or thru treatment plant
20% over limit
Discharged 0.072 MGD against a permitted limit of 0.06 MGD (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
BOD, 5-day, 20 deg. C
32% over limit
Discharged 7.46829994 kg/d against a permitted limit of 5.67499995 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
16% over limit
Discharged 2.63319998 kg/d against a permitted limit of 2.26999998 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
8% over limit
Discharged 12.9 mg/L against a permitted limit of 12 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Flow, in conduit or thru treatment plant
13% over limit
Discharged 0.085 MGD against a permitted limit of 0.075 MGD (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
14% over limit
Discharged 2.58779998 kg/d against a permitted limit of 2.26999998 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
22% over limit
Discharged 9.78 mg/L against a permitted limit of 8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
36% over limit
Discharged 16.3 mg/L against a permitted limit of 12 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
14% over limit
Discharged 2.59233998 kg/d against a permitted limit of 2.26999998 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
20% over limit
Discharged 82 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Numeric Violation
September 30, 2024
BOD, 5-day, 20 deg. C
60% over limit
Discharged 47.9 mg/L against a permitted limit of 30 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
27% over limit
Discharged 81 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
82% over limit
Discharged 10.35119991 kg/d against a permitted limit of 5.67499995 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)