FCA US LLC-CHELSEA PROVING GROUNDS
NPDES ID: MI0046540
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
May 31, 2026
Solids, total dissolved
3% over limit
Discharged 1850 mg/L against a permitted limit of 1800 mg/L (MO MAX)
DMR, Limited - Numeric Violation
Solids, total dissolved
229% over limit
Discharged 2982.77997494 kg/d against a permitted limit of 907.99999237 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total dissolved
71% over limit
Discharged 3728.70196867 kg/d against a permitted limit of 2179.19998169 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total dissolved
33% over limit
Discharged 3200 mg/L against a permitted limit of 2400 mg/L (MO MAX)
DMR, Limited - Numeric Violation
Solids, total dissolved
5% over limit
Discharged 1233.97198963 kg/d against a permitted limit of 1180.39999008 kg/d (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total dissolved
44% over limit
Discharged 1703.40798569 kg/d against a permitted limit of 1180.39999008 kg/d (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (6 months ago)
Last confirmed
October 15, 2026 (10 days ago)