CHESAPEAKE BAY DETACHMENT
NPDES ID: MD0020168
D — SNC: Discharge monitoring report not received
The facility didn't submit its required discharge monitoring report.
This quarter: 1 effluent violation, 2 reporting violations.
Violations
April 30, 2026
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, percent removal
53% over limit
Discharged 77 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
November 30, 2025
Nitrite + Nitrate total [as N]
0% over limit
Discharged 4.1 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.0060512 kg/d against a permitted limit of 0 kg/d (ANNL MAX)
DMR, Monitor Only - Overdue
Flow, total
0% over limit
Discharged 0.34 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 0.16 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 0.194296 kg/d against a permitted limit of 0 kg/d (MO TOTAL)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 6.6 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 1 mg/L against a permitted limit of 15 mg/L (MX WK AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.1816 kg/d against a permitted limit of 4.53999996 kg/d (MX MO AV)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.011 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.16 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0.04086 kg/d against a permitted limit of 2.26999998 kg/d (MX MO AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.227 kg/d against a permitted limit of 0.68099999 kg/d (MX MO AV)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.006705 kg/d against a permitted limit of 0 kg/d (MO TOTAL)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 4.3 mg/L against a permitted limit of 20 mg/L (MX MO AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (MAXIMUM)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.36774 kg/d against a permitted limit of 6.80999994 kg/d (MX WK AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 11 mg/L against a permitted limit of 30 mg/L (MX WK AV)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 9.8 mg/L against a permitted limit of 5 mg/L (INST MIN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0.07264 kg/d against a permitted limit of 3.40499997 kg/d (MX WK AV)
DMR, Limited - Overdue
Nitrogen, organic total [as N]
0% over limit
Discharged 0.5 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 8.2 SU against a permitted limit of 8.5 SU (MAXIMUM)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 2.48000002 kg/d (ANNL MAX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 0 kg/d (MO TOTAL)
DMR, Monitor Only - Overdue
Coliform, fecal general
0% over limit
Discharged 1 MPN/100mL against a permitted limit of 14 MPN/100mL (MAXIMUM)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.022 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 0.1015684 kg/d against a permitted limit of 0 kg/d (ANNL MAX)
DMR, Monitor Only - Overdue
Solids, suspended percent removal
0% over limit
Discharged 99 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 1 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Overdue
BOD, 5-day, percent removal
0% over limit
Discharged 87 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 4.6 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.5 mg/L against a permitted limit of 3.1 mg/L (MX MO AV)
DMR, Limited - Overdue
Phosphate, ortho [as P]
0% over limit
Discharged 0.22 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
October 31, 2025
Solids, suspended percent removal
0% over limit
Discharged 99 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.072712 kg/d against a permitted limit of 0 kg/d (MO TOTAL)
DMR, Monitor Only - Overdue
BOD, 5-day, percent removal
0% over limit
Discharged 87 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.022 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0.01341 kg/d against a permitted limit of 0 kg/d (MO TOTAL)
DMR, Monitor Only - Overdue
Flow, total
0% over limit
Discharged 0.34 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (MAXIMUM)
DMR, Limited - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 4.6 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 0.1015684 kg/d against a permitted limit of 0 kg/d (ANNL MAX)
DMR, Monitor Only - Overdue
Nitrogen, organic total [as N]
0% over limit
Discharged 0.5 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphate, ortho [as P]
0% over limit
Discharged 0.22 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 0.194296 kg/d against a permitted limit of 0 kg/d (MO TOTAL)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 4.3 mg/L against a permitted limit of 20 mg/L (MX MO AV)
DMR, Limited - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 0.16 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0.07264 kg/d against a permitted limit of 3.40499997 kg/d (MX WK AV)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 9.8 mg/L against a permitted limit of 5 mg/L (INST MIN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.011 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.36774 kg/d against a permitted limit of 6.80999994 kg/d (MX WK AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 6.6 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.16 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 4.1 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Coliform, fecal general
0% over limit
Discharged 14 MPN/100mL against a permitted limit of 14 MPN/100mL (MAXIMUM)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.0060512 kg/d against a permitted limit of 0 kg/d (ANNL MAX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 1 mg/L against a permitted limit of 10 mg/L (MX MO AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0.0001116 kg/d against a permitted limit of 2.48000002 kg/d (ANNL MAX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 11 mg/L against a permitted limit of 30 mg/L (MX WK AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.227 kg/d against a permitted limit of 0.3178 kg/d (MX MO AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0.04086 kg/d against a permitted limit of 2.26999998 kg/d (MX MO AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.5 mg/L against a permitted limit of 1.4 mg/L (MX MO AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 1 mg/L against a permitted limit of 15 mg/L (MX WK AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.2 SU against a permitted limit of 8.5 SU (MAXIMUM)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.1816 kg/d against a permitted limit of 4.53999996 kg/d (MX MO AV)
DMR, Limited - Overdue
September 30, 2025
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, percent removal
127% over limit
Discharged 66 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Numeric Violation
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
August 31, 2025
BOD, 5-day, 20 deg. C
0% over limit
Discharged 25 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 32 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
July 31, 2025
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
May 31, 2025
Chlorine, total residual
0% over limit
Discharged 0.1 mg/L against a permitted limit of 0.1 mg/L (MAXIMUM)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)