MIDDLESEX SCHOOL WWTP
NPDES ID: MAG580010
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 6 effluent violations, 1 reporting violation.
Violations
June 30, 2026
Phosphorus, total [as P]
358% over limit
Discharged 0.732 mg/L against a permitted limit of 0.16 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2026
Phosphorus, total [as P]
613% over limit
Discharged 1.14 mg/L against a permitted limit of 0.16 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
100% over limit
Discharged 3 mg/L against a permitted limit of 1.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
200% over limit
Discharged 3 mg/L against a permitted limit of 1 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Phosphorus, total [as P]
3038% over limit
Discharged 5.02 mg/L against a permitted limit of 0.16 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (6 days ago)