LA PORTE WWTP
NPDES ID: IN0025577
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
February 28, 2026
Nitrogen, ammonia total [as N]
37% over limit
Discharged 3.71 mg/L against a permitted limit of 2.7 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
44% over limit
Discharged 2.59 mg/L against a permitted limit of 1.8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
56% over limit
Discharged 4.2 mg/L against a permitted limit of 2.7 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
45% over limit
Discharged 2.61 mg/L against a permitted limit of 1.8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
8% over limit
Discharged 1.94 mg/L against a permitted limit of 1.8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
E. coli, colony forming units [CFU]
12% over limit
Discharged 263 MPN/100mL against a permitted limit of 235 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
0% over limit
Discharged 8.2 mg/L against a permitted limit of 6 mg/L (DLYAVMIN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 56.29599953 kg/d against a permitted limit of 90.8 kg/d (MX WK AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.4 SU against a permitted limit of 6 SU (DAILY MN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
48% over limit
Discharged 3.54 mg/L against a permitted limit of 2.4 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
June 30, 2025
Lead, total recoverable
0% over limit
Discharged 0.012 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Nickel, total recoverable
0% over limit
Discharged 0.007 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Chromium, total recoverable
0% over limit
Discharged 0.03 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Cadmium, total recoverable
0% over limit
Discharged 0.0002 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.032 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Chromium, total recoverable
0% over limit
Discharged 0.005 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0.019 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Silver total recoverable
0% over limit
Discharged 0.0001 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0.176 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Silver total recoverable
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0014 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Nickel, total recoverable
0% over limit
Discharged 0.024 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Cadmium, total recoverable
0% over limit
Discharged 0.0001 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.207 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
March 31, 2025
Cadmium, total recoverable
0% over limit
Discharged 0.0002 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Chromium, total recoverable
0% over limit
Discharged 0.003 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Silver total recoverable
0% over limit
Discharged 0.0001 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.033 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Silver total recoverable
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Chromium, total recoverable
0% over limit
Discharged 0.018 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Lead, total recoverable
0% over limit
Discharged 0.0003 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Lead, total recoverable
0% over limit
Discharged 0.008 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Nickel, total recoverable
0% over limit
Discharged 0.016 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Nickel, total recoverable
0% over limit
Discharged 0.007 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0.08 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Cadmium, total recoverable
0% over limit
Discharged 0.0001 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0.014 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 1.96 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)