BARNES APTS STP
NPDES ID: PA0094960
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 single-event violation.
Violations
March 31, 2026
Nitrogen, ammonia total [as N]
61% over limit
Discharged 29 mg/L against a permitted limit of 18 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
100% over limit
Discharged 18 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
134% over limit
Discharged 42.2 mg/L against a permitted limit of 18 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
291% over limit
Discharged 35.2 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
72% over limit
Discharged 1.4 mg/L against a permitted limit of 5 mg/L (INST MIN)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
6% over limit
Discharged 19 mg/L against a permitted limit of 18 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
64% over limit
Discharged 14.8 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
26% over limit
Discharged 11.3 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Phosphorus, total [as P]
25% over limit
Discharged 7.5 mg/L against a permitted limit of 6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Coliform, fecal general
476% over limit
Discharged 1152 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Coliform, fecal general
100% over limit
Discharged 2000 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
35% over limit
Discharged 8.1 mg/L against a permitted limit of 6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Coliform, fecal general
93% over limit
Discharged 1930 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
140% over limit
Discharged 7.2 mg/L against a permitted limit of 3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
43% over limit
Discharged 8.6 mg/L against a permitted limit of 6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
137% over limit
Discharged 14.2 mg/L against a permitted limit of 6 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Coliform, fecal general
165% over limit
Discharged 529 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
July 31, 2025
Coliform, fecal general
1100% over limit
Discharged 12000 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
Coliform, fecal general
338% over limit
Discharged 876 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
215% over limit
Discharged 18.9 mg/L against a permitted limit of 6 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
253% over limit
Discharged 10.6 mg/L against a permitted limit of 3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
808% over limit
Discharged 1815 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Coliform, fecal general
1690% over limit
Discharged 17900 MPN/100mL against a permitted limit of 1000 MPN/100mL (INST MAX)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
17% over limit
Discharged 3.5 mg/L against a permitted limit of 3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
229% over limit
Discharged 29.6 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
68% over limit
Discharged 30.2 mg/L against a permitted limit of 18 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
33% over limit
Discharged 8 mg/L against a permitted limit of 6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Solids, total suspended
57% over limit
Discharged 47 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
22% over limit
Discharged 30.4 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
141% over limit
Discharged 4815 MPN/100mL against a permitted limit of 2000 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
11% over limit
Discharged 19.9 mg/L against a permitted limit of 18 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
109% over limit
Discharged 18.8 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 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
Nitrogen, ammonia total [as N]
293% over limit
Discharged 35.4 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
103% over limit
Discharged 36.6 mg/L against a permitted limit of 18 mg/L (INST MAX)
DMR, Limited - Numeric Violation
July 31, 2024
Nitrogen, ammonia total [as N]
847% over limit
Discharged 28.4 mg/L against a permitted limit of 3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
587% over limit
Discharged 41.2 mg/L against a permitted limit of 6 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
72% over limit
Discharged 20.6 mg/L against a permitted limit of 12 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Coliform, fecal general
1179% over limit
Discharged 2557 MPN/100mL against a permitted limit of 200 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
187% over limit
Discharged 17.2 mg/L against a permitted limit of 6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
3% over limit
Discharged 31 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
1620% over limit
Discharged 17200 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
July 13, 2026 (24 days ago)