NORTHERN HIGH SCHOOL WWTP
NPDES ID: MD0052167
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: 4 effluent violations.
Violations
June 30, 2026
pH
0% over limit
Discharged 6.1 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
May 31, 2026
Nitrogen, ammonia total [as N]
47% over limit
Discharged 5.3 mg/L against a permitted limit of 3.6 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
31% over limit
Discharged 0.44492 kg/d against a permitted limit of 0.3405 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
April 30, 2026
Solids, total suspended
1% over limit
Discharged 4.31299996 kg/d against a permitted limit of 4.26759996 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, suspended percent removal
85% over limit
Discharged 72.254 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, total suspended
125% over limit
Discharged 6.44225995 kg/d against a permitted limit of 2.86019998 kg/d (MX MO AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (6 days ago)