RIVER PARK STP
NPDES ID: PA0057789
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: 1 effluent violation.
Violations
May 31, 2026
Chlorine, total residual
83% over limit
Discharged 2.2 mg/L against a permitted limit of 1.2 mg/L (INST MAX)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
66% over limit
Discharged 33.1 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
40% over limit
Discharged 35 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
8% over limit
Discharged 3.7 mg/L against a permitted limit of 4 mg/L (INST MIN)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
40% over limit
Discharged 28 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
25% over limit
Discharged 3 mg/L against a permitted limit of 4 mg/L (INST MIN)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total suspended
23% over limit
Discharged 37 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Coliform, fecal general
14% over limit
Discharged 228 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
28% over limit
Discharged 2.88 mg/L against a permitted limit of 4 mg/L (INST MIN)
DMR, Limited - Numeric Violation
Coliform, fecal general
640% over limit
Discharged 7400 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
July 31, 2025
Oxygen, dissolved [DO]
50% over limit
Discharged 2 mg/L against a permitted limit of 4 mg/L (INST MIN)
DMR, Limited - Numeric Violation
June 30, 2025
Oxygen, dissolved [DO]
48% over limit
Discharged 2.1 mg/L against a permitted limit of 4 mg/L (INST MIN)
DMR, Limited - Numeric Violation
May 31, 2025
Coliform, fecal general
280% over limit
Discharged 3800 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Coliform, fecal general
811% over limit
Discharged 1821 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, total suspended
10% over limit
Discharged 33 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
68% over limit
Discharged 1680 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Coliform, fecal general
22% over limit
Discharged 243 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, total suspended
13% over limit
Discharged 34 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Chlorine, total residual
8% over limit
Discharged 1.3 mg/L against a permitted limit of 1.2 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
135% over limit
Discharged 47 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
85% over limit
Discharged 37 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
20% over limit
Discharged 30 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Oxygen, dissolved [DO]
63% over limit
Discharged 1.5 mg/L against a permitted limit of 4 mg/L (INST MIN)
DMR, Limited - Numeric Violation
November 30, 2024
Chlorine, total residual
75% over limit
Discharged 2.1 mg/L against a permitted limit of 1.2 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Coliform, fecal general
12% over limit
Discharged 1120 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
68% over limit
Discharged 1.3 mg/L against a permitted limit of 4 mg/L (INST MIN)
DMR, Limited - Numeric Violation
Coliform, fecal general
127% over limit
Discharged 454 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (4 hours ago)