GARY SANITARY DISTRICT
NPDES ID: IN0022977
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 2 effluent violations.
Violations
April 30, 2026
Nitrogen, ammonia total [as N]
6% over limit
Discharged 2.8 mg/L against a permitted limit of 2.63 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
10% over limit
Discharged 15.9 mg/L against a permitted limit of 14.4 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
582% over limit
Discharged 98.2 mg/L against a permitted limit of 14.4 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
77% over limit
Discharged 11580.1779027 kg/d against a permitted limit of 6546.67994499 kg/d (MX WK AV)
DMR, Limited - Numeric Violation
Solids, total suspended
193% over limit
Discharged 28.1 mg/L against a permitted limit of 9.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Chlorine, total residual
0% over limit
Discharged 2.36079998 kg/d against a permitted limit of 3.63199997 kg/d (MO AVG)
DMR, Limited - Overdue
Phosphorus, total percent removal
0% over limit
Discharged 94.4 % against a permitted limit of 70 % (MO AV MN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 30.511 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
September 30, 2025
Phosphorus, total percent removal
0% over limit
Discharged 93.5 % against a permitted limit of 70 % (MO AV MN)
DMR, Limited - Overdue
June 30, 2025
Toxicity [chronic], Pimephales promelas [Fathead Minnow]
100% over limit
Discharged 4 toxic against a permitted limit of 2 toxic (MAXIMUM)
DMR, Limited - Overdue
February 28, 2025
Nitrogen, ammonia total [as N]
60% over limit
Discharged 4.2 mg/L against a permitted limit of 2.63 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
19% over limit
Discharged 2.78 mg/L against a permitted limit of 2.33 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)