PHILA WATER DEPT - SOUTHWEST WPC PLANT
NPDES ID: PA0026671
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: 9 effluent violations.
Violations
April 30, 2026
BOD, carbonaceous [5 day, 20 C]
34% over limit
Discharged 18080.54984808 kg/d against a permitted limit of 13483.7998867 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
158% over limit
Discharged 87790.88726234 kg/d against a permitted limit of 34077.23971367 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
43% over limit
Discharged 12871.80789185 kg/d against a permitted limit of 8989.19992447 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
129% over limit
Discharged 52484.669559 kg/d against a permitted limit of 22881.59980774 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carb-5 day, 20 deg C, percent removal
52% over limit
Discharged 83.69 % against a permitted limit of 89.25 % (MO MIN)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
133% over limit
Discharged 65 % against a permitted limit of 85 % (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
164% over limit
Discharged 119 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [20 day, 20 C]
26% over limit
Discharged 20434.0858283 kg/d against a permitted limit of 16266.81986332 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
127% over limit
Discharged 68 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
155% over limit
Discharged 86891.05926991 kg/d against a permitted limit of 34077.23971367 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
53% over limit
Discharged 77 % against a permitted limit of 85 % (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
44% over limit
Discharged 32836.0037241 kg/d against a permitted limit of 22881.59980774 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
153% over limit
Discharged 34053.17771387 kg/d against a permitted limit of 13483.7998867 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
23% over limit
Discharged 37 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
111% over limit
Discharged 95 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [20 day, 20 C]
87% over limit
Discharged 30394.39174461 kg/d against a permitted limit of 16266.81986332 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
65% over limit
Discharged 14874.85587502 kg/d against a permitted limit of 8989.19992447 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carb-5 day, 20 deg C, percent removal
60% over limit
Discharged 82.82 % against a permitted limit of 89.25 % (MO MIN)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
61% over limit
Discharged 55020.71353769 kg/d against a permitted limit of 34077.23971367 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 9 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 19408.49983692 kg/d against a permitted limit of 13483.7998867 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 20 mg/L against a permitted limit of 40 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
20% over limit
Discharged 54 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 7408.82593775 kg/d against a permitted limit of 8989.19992447 kg/d (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Solids, total suspended
9% over limit
Discharged 49 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
March 31, 2025
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 10 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 7503.71193695 kg/d against a permitted limit of 8989.19992447 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 12482.27589512 kg/d against a permitted limit of 13483.7998867 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
24% over limit
Discharged 42195.66764545 kg/d against a permitted limit of 34077.23971367 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
7% over limit
Discharged 84 % against a permitted limit of 85 % (MO MIN)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 17 mg/L against a permitted limit of 40 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
22% over limit
Discharged 55 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
November 30, 2024
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 5 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 3171.64397335 kg/d against a permitted limit of 8989.19992447 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 5596.91195297 kg/d against a permitted limit of 13483.7998867 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 7 mg/L against a permitted limit of 40 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)