WEST GROVE BORO STP
NPDES ID: PA0024066
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: 2 effluent violations.
Violations
May 31, 2026
Nitrogen, total [as N]
13% over limit
Discharged 13.05 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, total [as N]
28% over limit
Discharged 14.83 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, total [as N]
14% over limit
Discharged 13.28 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, total [as N]
26% over limit
Discharged 13.89239988 kg/d against a permitted limit of 10.98679991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
67% over limit
Discharged 19.33 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, total [as N]
47% over limit
Discharged 17.01 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, total [as N]
131% over limit
Discharged 26.77 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
34% over limit
Discharged 19.34 mg/L against a permitted limit of 14.4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
65% over limit
Discharged 18.11459985 kg/d against a permitted limit of 10.98679991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, total [as N]
13% over limit
Discharged 13.12 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, total [as N]
28% over limit
Discharged 14.88 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, total [as N]
5% over limit
Discharged 12.13 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, total [as N]
34% over limit
Discharged 15.54 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
58% over limit
Discharged 7.59 mg/L against a permitted limit of 4.8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, total suspended
28% over limit
Discharged 54.57079954 kg/d against a permitted limit of 42.58519964 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
28% over limit
Discharged 14.84 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
16% over limit
Discharged 12.75739989 kg/d against a permitted limit of 10.98679991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, total [as N]
14% over limit
Discharged 12.57579989 kg/d against a permitted limit of 10.98679991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
64% over limit
Discharged 18.97 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, total [as N]
14% over limit
Discharged 13.18 mg/L against a permitted limit of 11.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Phosphorus, total [as P]
29% over limit
Discharged 2.45159998 kg/d against a permitted limit of 1.90679998 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
87% over limit
Discharged 3.73 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)