FREDERICK CITY WWTP
NPDES ID: MD0021610
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
Phosphorus, total [as P]
42% over limit
Discharged 12.90964013 kg/d against a permitted limit of 9.06316009 kg/d (ANNL MAX)
DMR, Limited - Numeric Violation
April 30, 2026
Phosphorus, total [as P]
36% over limit
Discharged 12.32907212 kg/d against a permitted limit of 9.06316009 kg/d (ANNL MAX)
DMR, Limited - Numeric Violation
March 31, 2026
BOD, 5-day, 20 deg. C
19% over limit
Discharged 1399.04638824 kg/d against a permitted limit of 1180.39999008 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
163% over limit
Discharged 3099.09477396 kg/d against a permitted limit of 1180.39999008 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
56% over limit
Discharged 1228.66018968 kg/d against a permitted limit of 787.68999338 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
43% over limit
Discharged 55.7 mg/L against a permitted limit of 39 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
217% over limit
Discharged 123.5 mg/L against a permitted limit of 39 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
10% over limit
Discharged 9.9662521 kg/d against a permitted limit of 9.06316009 kg/d (ANNL MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
48% over limit
Discharged 38.5 mg/L against a permitted limit of 26 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
February 28, 2026
BOD, 5-day, 20 deg. C
97% over limit
Discharged 51.1 mg/L against a permitted limit of 26 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
160% over limit
Discharged 101.5 mg/L against a permitted limit of 39 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
122% over limit
Discharged 2623.25737796 kg/d against a permitted limit of 1180.39999008 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
445% over limit
Discharged 212.6 mg/L against a permitted limit of 39 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
365% over limit
Discharged 5493.35455384 kg/d against a permitted limit of 1180.39999008 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
59% over limit
Discharged 1249.4079895 kg/d against a permitted limit of 787.68999338 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
Solids, total suspended
236% over limit
Discharged 87.3 mg/L against a permitted limit of 26 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Solids, total suspended
180% over limit
Discharged 2205.71358147 kg/d against a permitted limit of 787.68999338 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
December 31, 2025
Phosphorus, total [as P]
49% over limit
Discharged 13.52220013 kg/d against a permitted limit of 9.06316009 kg/d (ANNL MAX)
DMR, Limited - Numeric Violation
November 30, 2025
Phosphorus, total [as P]
48% over limit
Discharged 13.39311613 kg/d against a permitted limit of 9.06316009 kg/d (ANNL MAX)
DMR, Limited - Numeric Violation
October 31, 2025
Phosphorus, total [as P]
26% over limit
Discharged 11.44941611 kg/d against a permitted limit of 9.06316009 kg/d (ANNL MAX)
DMR, Limited - Numeric Violation
September 30, 2025
Phosphorus, total [as P]
17% over limit
Discharged 10.63982011 kg/d against a permitted limit of 9.06316009 kg/d (ANNL MAX)
DMR, Limited - Numeric Violation
August 31, 2025
Phosphorus, total [as P]
14% over limit
Discharged 10.3739641 kg/d against a permitted limit of 9.06316009 kg/d (ANNL MAX)
DMR, Limited - Numeric Violation
March 31, 2025
Phosphate, ortho [as P]
0% over limit
Discharged 0.1 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)