MANCHESTER WWTP
NPDES ID: MD0022578
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.
This quarter: 2 effluent violations.
Violations
May 31, 2026
pH
0% over limit
Discharged 6.4 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
April 30, 2026
pH
0% over limit
Discharged 6.4 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
March 31, 2026
pH
0% over limit
Discharged 6.4 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
February 28, 2026
Phosphorus, total [as P]
40% over limit
Discharged 1.4 mg/L against a permitted limit of 1 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
E. coli
1767% over limit
Discharged 2353 MPN/100mL against a permitted limit of 126 MPN/100mL (MX MO GMN)
DMR, Limited - Numeric Violation
Solids, total suspended
6% over limit
Discharged 47.5 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
4% over limit
Discharged 10.43 mg/L against a permitted limit of 10 mg/L (AVERAGE)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
17% over limit
Discharged 30.91739974 kg/d against a permitted limit of 26.33199978 kg/d (MX DA AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.3 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
64% over limit
Discharged 23 mg/L against a permitted limit of 14 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
293% over limit
Discharged 18.1 mg/L against a permitted limit of 4.6 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
133% over limit
Discharged 20.11219983 kg/d against a permitted limit of 8.62599993 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
13% over limit
Discharged 5.2 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
36% over limit
Discharged 19 mg/L against a permitted limit of 14 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
204% over limit
Discharged 14 mg/L against a permitted limit of 4.6 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
E. coli
81% over limit
Discharged 228 MPN/100mL against a permitted limit of 126 MPN/100mL (MX MO GMN)
DMR, Limited - Numeric Violation
Solids, total suspended
1% over limit
Discharged 45.5 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
80% over limit
Discharged 15.52679987 kg/d against a permitted limit of 8.62599993 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
164% over limit
Discharged 37 mg/L against a permitted limit of 14 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
52% over limit
Discharged 40.04279966 kg/d against a permitted limit of 26.33199978 kg/d (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
131% over limit
Discharged 19.88519983 kg/d against a permitted limit of 8.62599993 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
64% over limit
Discharged 74 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
E. coli
15% over limit
Discharged 145 MPN/100mL against a permitted limit of 126 MPN/100mL (MX MO GMN)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
1% over limit
Discharged 85.98759928 kg/d against a permitted limit of 85.35199928 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
270% over limit
Discharged 17 mg/L against a permitted limit of 4.6 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
July 31, 2025
Flow, in conduit or thru treatment plant
2% over limit
Discharged 0.51 MGD against a permitted limit of 0.5 MGD (ANNL AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Flow, in conduit or thru treatment plant
6% over limit
Discharged 0.531 MGD against a permitted limit of 0.5 MGD (ANNL AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Phosphorus, total [as P]
30% over limit
Discharged 1.95 mg/L against a permitted limit of 1.5 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
121% over limit
Discharged 31 mg/L against a permitted limit of 14 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
18% over limit
Discharged 1.18 mg/L against a permitted limit of 1 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
385% over limit
Discharged 22.3 mg/L against a permitted limit of 4.6 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
E. coli
672% over limit
Discharged 972.4 MPN/100mL against a permitted limit of 126 MPN/100mL (MX MO GMN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
137% over limit
Discharged 20.42999983 kg/d against a permitted limit of 8.62599993 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 230 MPN/100mL against a permitted limit of 0 MPN/100mL (AVERAGE)
DMR, Limited - Numeric Violation
January 31, 2025
E. coli
26% over limit
Discharged 158.5 MPN/100mL against a permitted limit of 126 MPN/100mL (MX MO GMN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
181% over limit
Discharged 24.2435998 kg/d against a permitted limit of 8.62599993 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
43% over limit
Discharged 20 mg/L against a permitted limit of 14 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1% over limit
Discharged 26.55899978 kg/d against a permitted limit of 26.33199978 kg/d (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
254% over limit
Discharged 16.3 mg/L against a permitted limit of 4.6 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, ammonia total [as N]
8% over limit
Discharged 9.30699992 kg/d against a permitted limit of 8.62599993 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
43% over limit
Discharged 20 mg/L against a permitted limit of 14 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
126% over limit
Discharged 10.4 mg/L against a permitted limit of 4.6 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)