SALEM WWTP
NPDES ID: MO0021768
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 3 effluent violations.
Violations
May 31, 2026
E. coli
135% over limit
Discharged 2420 MPN/100mL against a permitted limit of 1030 MPN/100mL (7 DA GEO)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
78% over limit
Discharged 12.1 mg/L against a permitted limit of 6.8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
483% over limit
Discharged 8.74 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Lead, total recoverable
68% over limit
Discharged 0.0067 mg/L against a permitted limit of 0.004 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Cadmium, total recoverable
150% over limit
Discharged 0.0015 mg/L against a permitted limit of 0.0006 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)