RONAN- CITY OF WWTF
NPDES ID: MT0021474
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 1 effluent violation.
Violations
June 30, 2026
Nitrogen, ammonia total [as N]
35% over limit
Discharged 5.1 mg/L against a permitted limit of 3.78 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
339% over limit
Discharged 16.6 mg/L against a permitted limit of 3.78 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
8% over limit
Discharged 16.6 mg/L against a permitted limit of 15.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
397% over limit
Discharged 18.8 mg/L against a permitted limit of 3.78 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
22% over limit
Discharged 18.8 mg/L against a permitted limit of 15.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
3% over limit
Discharged 15.9 mg/L against a permitted limit of 15.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (5 days ago)