RYAN DERWYN INVESTMENTS LLC - COURTNEY RUN MHP
NPDES ID: LAG542434
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: 4 effluent violations.
Violations
June 30, 2026
BOD, carbonaceous [5 day, 20 C]
1060% over limit
Discharged 58 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
1400% over limit
Discharged 3000 MPN/100mL against a permitted limit of 200 MPN/100mL (MOAV GEO)
DMR, Limited - Numeric Violation
Solids, total suspended
33% over limit
Discharged 40 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
700% over limit
Discharged 16 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
BOD, carbonaceous [5 day, 20 C]
400% over limit
Discharged 25 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Oxygen, dissolved [DO]
0% over limit
Discharged 8 mg/L against a permitted limit of 5 mg/L (MO AV MN)
DMR, Limited - Overdue
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (5 days ago)