STILLWATER LAKE ESTATES - STP
NPDES ID: PA0061107
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
April 30, 2026
Solids, total suspended
24% over limit
Discharged 33.09659972 kg/d against a permitted limit of 26.69519978 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
48% over limit
Discharged 44.4 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
BOD, carbonaceous [5 day, 20 C]
14% over limit
Discharged 15.16359987 kg/d against a permitted limit of 13.34759989 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
133% over limit
Discharged 62.24339948 kg/d against a permitted limit of 26.69519978 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
45% over limit
Discharged 1.28481999 kg/d against a permitted limit of 0.88529999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
12% over limit
Discharged 33.5 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
27% over limit
Discharged 38.2 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
19% over limit
Discharged 17.9 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
60% over limit
Discharged 1.6 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
91% over limit
Discharged 57.4 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
30% over limit
Discharged 1.3 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
3% over limit
Discharged 15.4 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
152% over limit
Discharged 75.6 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
69% over limit
Discharged 44.99139962 kg/d against a permitted limit of 26.69519978 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
50% over limit
Discharged 1.5 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Phosphorus, total [as P]
30% over limit
Discharged 1.3 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
10% over limit
Discharged 2.95099998 kg/d against a permitted limit of 2.67859998 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
63% over limit
Discharged 4.9 mg/L against a permitted limit of 3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
57% over limit
Discharged 4.7 mg/L against a permitted limit of 3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
7% over limit
Discharged 2.86019998 kg/d against a permitted limit of 2.67859998 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
224% over limit
Discharged 648 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 20000 MPN/100mL against a permitted limit of 1000 MPN/100mL (90%Samples)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, total suspended
8% over limit
Discharged 32.3 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, total suspended
32% over limit
Discharged 39.7 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
27% over limit
Discharged 19.1 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
11% over limit
Discharged 29.64619975 kg/d against a permitted limit of 26.69519978 kg/d (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Solids, total suspended
25% over limit
Discharged 37.4 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Phosphorus, total [as P]
10% over limit
Discharged 0.97609999 kg/d against a permitted limit of 0.88529999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
380% over limit
Discharged 144 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
108% over limit
Discharged 31.2 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
170% over limit
Discharged 2.7 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
91% over limit
Discharged 51.12039957 kg/d against a permitted limit of 26.69519978 kg/d (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total suspended
60% over limit
Discharged 47.9 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
52% over limit
Discharged 40.49679966 kg/d against a permitted limit of 26.69519978 kg/d (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
pH
0% over limit
Discharged 5.5 SU against a permitted limit of 6 SU (INST MIN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)