GLEN ARM WASTEWATER TREATMENT PLANT (FORMERLY GRUMMAN WWTP)
NPDES ID: MD0067903
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: 1 effluent violation.
Violations
February 28, 2026
Nitrogen, ammonia total [as N]
52% over limit
Discharged 4.1 mg/L against a permitted limit of 2.7 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
7% over limit
Discharged 0.13166 kg/d against a permitted limit of 0.12258 kg/d (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
140% over limit
Discharged 16.1 mg/L against a permitted limit of 6.7 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
70% over limit
Discharged 34 mg/L against a permitted limit of 20 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
37% over limit
Discharged 61.8 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
67% over limit
Discharged 50 mg/L against a permitted limit of 30 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
340% over limit
Discharged 29.5 mg/L against a permitted limit of 6.7 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
200% over limit
Discharged 8.1 mg/L against a permitted limit of 2.7 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total suspended
43% over limit
Discharged 43 mg/L against a permitted limit of 30 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
10% over limit
Discharged 33 mg/L against a permitted limit of 30 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.4 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
13% over limit
Discharged 0.04086 kg/d against a permitted limit of 0.03632 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
368% over limit
Discharged 34.6 mg/L against a permitted limit of 7.4 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
107% over limit
Discharged 0.28148 kg/d against a permitted limit of 0.1362 kg/d (MX DA AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
260% over limit
Discharged 7.2 mg/L against a permitted limit of 2 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
March 31, 2025
Oil & Grease
19% over limit
Discharged 17.9 mg/L against a permitted limit of 15 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Oil & Grease
19% over limit
Discharged 17.9 mg/L against a permitted limit of 15 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
15% over limit
Discharged 7.7 mg/L against a permitted limit of 6.7 mg/L (MX DA AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 29, 2026 (2 days ago)