DANVILLE SANITARY DISTRICT STP
NPDES ID: IL0020788
T — SNC: Compliance schedule reporting violation
The facility was more than 30 days late reporting progress on its compliance schedule.
Violations
November 30, 2025
Nitrogen, ammonia total [as N]
108% over limit
Discharged 9.14 mg/L against a permitted limit of 4.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
55% over limit
Discharged 2.33 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
23% over limit
Discharged 5.16 mg/L against a permitted limit of 4.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
105% over limit
Discharged 8.6 mg/L against a permitted limit of 4.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Nitrogen, ammonia total [as N]
106% over limit
Discharged 2.27 mg/L against a permitted limit of 1.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (4 hours ago)