OTTOVILLE WWTP
NPDES ID: OH0021709
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: 2 effluent violations, 1 permit schedule violation.
Violations
April 30, 2026
Mercury, total low level
82% over limit
Discharged 0.0000474 kg/d against a permitted limit of 0.000026 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total low level
78% over limit
Discharged 0.0000348 mg/L against a permitted limit of 0.0000196 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Mercury, total low level
10% over limit
Discharged 0.0000215 mg/L against a permitted limit of 0.0000196 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Mercury, total low level
54% over limit
Discharged 0.0000301 mg/L against a permitted limit of 0.0000196 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Mercury, total low level
21% over limit
Discharged 0.0000238 mg/L against a permitted limit of 0.0000196 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Mercury, total low level
55% over limit
Discharged 0.0000304 mg/L against a permitted limit of 0.0000196 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (4 days ago)