BTR HAMPSTEAD, LLC.
NPDES ID: MD0001881
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
February 28, 2026
Nitrogen, ammonia total [as N]
63% over limit
Discharged 15.52679987 kg/d against a permitted limit of 9.53399992 kg/d (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
395% over limit
Discharged 20.3 mg/L against a permitted limit of 4.1 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
47% over limit
Discharged 5.99279995 kg/d against a permitted limit of 4.08599997 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
333% over limit
Discharged 7.8 mg/L against a permitted limit of 1.8 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
350% over limit
Discharged 8.1 mg/L against a permitted limit of 1.8 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
13% over limit
Discharged 10.75979991 kg/d against a permitted limit of 9.53399992 kg/d (MX DA AV)
DMR, Limited - Numeric Violation
E. coli
13% over limit
Discharged 68 MPN/100mL against a permitted limit of 60 MPN/100mL (MX MO GMN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
220% over limit
Discharged 13.1 mg/L against a permitted limit of 4.1 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
57% over limit
Discharged 6.40139995 kg/d against a permitted limit of 4.08599997 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
139% over limit
Discharged 4.3 mg/L against a permitted limit of 1.8 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
83% over limit
Discharged 7.5 mg/L against a permitted limit of 4.1 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
September 30, 2025
PER-AND POLYFLUOROALKYL SUBSTANCES
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Organics, tot purgeables [Method 624]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (DAILY MX)
DMR, Limited - Overdue
1,1,1-Trichloroethane
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Tetrachloroethene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Trichloroethene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Flow
0% over limit
Discharged 0.256 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Flow
0% over limit
Discharged 0.2016 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Temperature, water deg. fahrenheit
0% over limit
Discharged 0 deg F against a permitted limit of 0 deg F (DAILY MX)
DMR, Monitor Only - Overdue
Tetrachloroethene
0% over limit
Discharged 0 mg/L against a permitted limit of 0.005 mg/L (DAILY MX)
DMR, Limited - Overdue
Organics, tot purgeables [Method 624]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Flow
0% over limit
Discharged 0.2016 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Temperature, water deg. fahrenheit
0% over limit
Discharged 0 deg F against a permitted limit of 0 deg F (WKLY AVG)
DMR, Monitor Only - Overdue
Trichloroethene
0% over limit
Discharged 0 mg/L against a permitted limit of 0.005 mg/L (DAILY MX)
DMR, Limited - Overdue
Flow
0% over limit
Discharged 0.256 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
1,1,1-Trichloroethane
0% over limit
Discharged 0 mg/L against a permitted limit of 0.005 mg/L (DAILY MX)
DMR, Limited - Overdue
Temperature, water deg. fahrenheit
0% over limit
Discharged 0 deg F against a permitted limit of 0 deg F (DAILY AV)
DMR, Monitor Only - Overdue
PER-AND POLYFLUOROALKYL SUBSTANCES
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
June 30, 2025
Temperature, water deg. fahrenheit
0% over limit
Discharged 57.28 deg F against a permitted limit of 0 deg F (DAILY AV)
DMR, Monitor Only - Overdue
Temperature, water deg. fahrenheit
0% over limit
Discharged 88.13 deg F against a permitted limit of 0 deg F (DAILY MX)
DMR, Monitor Only - Overdue
Temperature, water deg. fahrenheit
0% over limit
Discharged 60.21 deg F against a permitted limit of 0 deg F (WKLY AVG)
DMR, Monitor Only - Overdue
March 31, 2025
Oxygen, dissolved [DO]
0% over limit
Discharged 0 mg/L against a permitted limit of 5 mg/L (INST MIN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
83% over limit
Discharged 7.5 mg/L against a permitted limit of 4.1 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 0 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 8.5 SU (MAXIMUM)
DMR, Limited - Overdue
February 28, 2025
Nitrogen, ammonia total [as N]
567% over limit
Discharged 12 mg/L against a permitted limit of 1.8 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
44% over limit
Discharged 13.75619988 kg/d against a permitted limit of 9.53399992 kg/d (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
128% over limit
Discharged 9.30699992 kg/d against a permitted limit of 4.08599997 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
317% over limit
Discharged 17.1 mg/L against a permitted limit of 4.1 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
January 31, 2025
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]
500% over limit
Discharged 10.8 mg/L against a permitted limit of 1.8 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
77% over limit
Discharged 16.84339986 kg/d against a permitted limit of 9.53399992 kg/d (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
388% over limit
Discharged 20 mg/L against a permitted limit of 4.1 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
152% over limit
Discharged 10.30579991 kg/d against a permitted limit of 4.08599997 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)