LARIMER COUNTY LANDFILL
NPDES ID: CO0049056
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 34 effluent violations, 2 permit schedule violations.
Violations
June 30, 2026
Static Renewal 7 Day Chronic Ceriodaphnia dubia
Limit violation
Discharged 20 toxic against a permitted limit of 100 toxic (MN VALUE)
DMR, Limited - Numeric Violation
Static Renewal 7 Day Chronic Pimephales promelas
45% over limit
Discharged 54.92 toxic against a permitted limit of 100 toxic (MN VALUE)
DMR, Limited - Numeric Violation
April 30, 2026
Selenium, potentially dissolvd
297% over limit
Discharged 0.00274 mg/L against a permitted limit of 0.00069 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
Arsenic, total recoverable
49000% over limit
Discharged 0.00982 mg/L against a permitted limit of 0.00002 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate
6643% over limit
Discharged 16857.1 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Boron, total
745% over limit
Discharged 0.93 mg/L against a permitted limit of 0.11 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (6 days ago)