BRISTOL WWTP
NPDES ID: IN0036846
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
March 31, 2026
Nitrogen, ammonia total [as N]
55% over limit
Discharged 32.9 mg/L against a permitted limit of 21.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
54% over limit
Discharged 14.03 mg/L against a permitted limit of 9.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
34% over limit
Discharged 28.5 mg/L against a permitted limit of 21.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
51% over limit
Discharged 13.73 mg/L against a permitted limit of 9.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
28% over limit
Discharged 11.64 mg/L against a permitted limit of 9.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Toxicity [acute], Ceriodaphnia dubia
0% over limit
Discharged 0 toxic against a permitted limit of 1 toxic (MAXIMUM)
DMR, Limited - Overdue
Solids, total suspended
2% over limit
Discharged 30.5 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
TU Static 48Hr Acute Daphnia magna
0% over limit
Discharged 0 toxic against a permitted limit of 1 toxic (MAXIMUM)
DMR, Limited - Overdue
Toxicity [acute], Pimephales promelas [Fathead Minnow]
0% over limit
Discharged 0 toxic against a permitted limit of 1 toxic (MAXIMUM)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
48% over limit
Discharged 59.04 mg/L against a permitted limit of 40 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
22% over limit
Discharged 24.7 mg/L against a permitted limit of 20.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
15% over limit
Discharged 28.8 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
TU Static 48Hr Acute Daphnia pulex
0% over limit
Discharged 0 toxic against a permitted limit of 1 toxic (MAXIMUM)
DMR, Limited - Overdue
June 30, 2025
Nitrogen, ammonia total [as N]
4% over limit
Discharged 21 mg/L against a permitted limit of 20.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, ammonia total [as N]
68% over limit
Discharged 35.7 mg/L against a permitted limit of 21.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
28% over limit
Discharged 11.66 mg/L against a permitted limit of 9.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
TU Static 48Hr Acute Daphnia magna
0% over limit
Discharged 0 toxic against a permitted limit of 1 toxic (MAXIMUM)
DMR, Limited - Overdue
TU Static 48Hr Acute Daphnia pulex
0% over limit
Discharged 0 toxic against a permitted limit of 1 toxic (MAXIMUM)
DMR, Limited - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)