LOYSVILLE STP
NPDES ID: PA0043494
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: 17 effluent violations.
Violations
May 31, 2026
Phosphorus, total [as P]
50% over limit
Discharged 1.22579999 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
1740% over limit
Discharged 18400 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
408% over limit
Discharged 12.7 mg/L against a permitted limit of 2.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
296% over limit
Discharged 4.49459996 kg/d against a permitted limit of 1.13499999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
85% over limit
Discharged 3.7 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
2721% over limit
Discharged 5641 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
9% over limit
Discharged 10.89599991 kg/d against a permitted limit of 9.98799992 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
19% over limit
Discharged 29.8 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Coliform, fecal general
100% over limit
Discharged 20000 MPN/100mL against a permitted limit of 10000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Chlorine, total residual
125% over limit
Discharged 0.45 mg/L against a permitted limit of 0.2 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
Solids, total suspended
35% over limit
Discharged 40.5 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
23% over limit
Discharged 4.19041996 kg/d against a permitted limit of 3.40499997 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
22% over limit
Discharged 0.99879999 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
8% over limit
Discharged 9.2 mg/L against a permitted limit of 8.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
49% over limit
Discharged 14.84579988 kg/d against a permitted limit of 9.98799992 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
60% over limit
Discharged 19.61279984 kg/d against a permitted limit of 12.2579999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Coliform, fecal general
337% over limit
Discharged 8733 MPN/100mL against a permitted limit of 2000 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
33% over limit
Discharged 1.08959999 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
9% over limit
Discharged 49 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
166% over limit
Discharged 49.53139958 kg/d against a permitted limit of 18.61399984 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
127% over limit
Discharged 22.69999981 kg/d against a permitted limit of 9.98799992 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
100% over limit
Discharged 20000 MPN/100mL against a permitted limit of 10000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
28% over limit
Discharged 38.3 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
65% over limit
Discharged 5.62959995 kg/d against a permitted limit of 3.40499997 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
12% over limit
Discharged 28 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
151% over limit
Discharged 30.82659974 kg/d against a permitted limit of 12.2579999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
169% over limit
Discharged 32.96039972 kg/d against a permitted limit of 12.2579999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
48% over limit
Discharged 59 mg/L against a permitted limit of 40 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
58% over limit
Discharged 13.4 mg/L against a permitted limit of 8.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
133% over limit
Discharged 23.2901998 kg/d against a permitted limit of 9.98799992 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
111% over limit
Discharged 63.4 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
99% over limit
Discharged 6.76459994 kg/d against a permitted limit of 3.40499997 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
116% over limit
Discharged 40.26979966 kg/d against a permitted limit of 18.61399984 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
10% over limit
Discharged 2.2 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
39% over limit
Discharged 1.13499999 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
100% over limit
Discharged 20000 MPN/100mL against a permitted limit of 10000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
59% over limit
Discharged 71.5 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
149% over limit
Discharged 40.63299966 kg/d against a permitted limit of 16.34399986 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
70% over limit
Discharged 42.5 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
5% over limit
Discharged 8.9 mg/L against a permitted limit of 8.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
32% over limit
Discharged 52.8 mg/L against a permitted limit of 40 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
104% over limit
Discharged 4080 MPN/100mL against a permitted limit of 2000 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
31% over limit
Discharged 4.44919996 kg/d against a permitted limit of 3.40499997 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
171% over limit
Discharged 50.53019958 kg/d against a permitted limit of 18.61399984 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
30% over limit
Discharged 2.6 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
39% over limit
Discharged 16.97959986 kg/d against a permitted limit of 12.2579999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
100% over limit
Discharged 20000 MPN/100mL against a permitted limit of 10000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
11% over limit
Discharged 33.3 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
72% over limit
Discharged 28.10259976 kg/d against a permitted limit of 16.34399986 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
111% over limit
Discharged 95 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
44% over limit
Discharged 1.18039999 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Phosphorus, total [as P]
60% over limit
Discharged 3.2 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
33% over limit
Discharged 1.08959999 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Coliform, fecal general
230% over limit
Discharged 3300 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
161% over limit
Discharged 2.13379998 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
126% over limit
Discharged 452 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
20% over limit
Discharged 2.4 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Coliform, fecal general
188% over limit
Discharged 576 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
72% over limit
Discharged 1.40739999 kg/d against a permitted limit of 0.81719999 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
180% over limit
Discharged 2800 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
5% over limit
Discharged 2.1 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Coliform, fecal general
63% over limit
Discharged 326 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Coliform, fecal general
310% over limit
Discharged 4100 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
June 30, 2025
Coliform, fecal general
100% over limit
Discharged 2000 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Coliform, fecal general
42% over limit
Discharged 284 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
May 31, 2025
Coliform, fecal general
1900% over limit
Discharged 20000 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Coliform, fecal general
617% over limit
Discharged 1433 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
February 28, 2025
Chlorine, total residual
50% over limit
Discharged 0.3 mg/L against a permitted limit of 0.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Coliform, fecal general
60% over limit
Discharged 16000 MPN/100mL against a permitted limit of 10000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
October 31, 2024
Coliform, fecal general
9% over limit
Discharged 10900 MPN/100mL against a permitted limit of 10000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
August 31, 2024
Coliform, fecal general
Limit violation
Discharged 373 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 (INST MAX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)