CONESVILLE COAL PREPARATION PLANT
NPDES ID: OH0076368
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
March 31, 2026
Manganese, total [as Mn]
44% over limit
Discharged 2.87000014 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Manganese, total [as Mn]
6% over limit
Discharged 4.2200002 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
6% over limit
Discharged 2.1200001 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Manganese, total [as Mn]
49% over limit
Discharged 5.95000028 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
118% over limit
Discharged 4.35000021 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Manganese, total [as Mn]
176% over limit
Discharged 11.05700053 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
159% over limit
Discharged 5.17230025 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Manganese, total [as Mn]
51% over limit
Discharged 6.03000029 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
115% over limit
Discharged 4.3000002 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Manganese, total [as Mn]
108% over limit
Discharged 4.1500002 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
90% over limit
Discharged 7.59000036 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Manganese, total [as Mn]
72% over limit
Discharged 6.88000033 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
80% over limit
Discharged 3.60000017 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Manganese, total [as Mn]
301% over limit
Discharged 8.02000038 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
240% over limit
Discharged 13.58000065 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Manganese, total [as Mn]
388% over limit
Discharged 9.75000046 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
365% over limit
Discharged 18.58000088 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Manganese, total [as Mn]
157% over limit
Discharged 5.14300024 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
39% over limit
Discharged 5.54000026 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Manganese, total [as Mn]
210% over limit
Discharged 12.40000059 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
62% over limit
Discharged 3.23000015 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Manganese, total [as Mn]
118% over limit
Discharged 4.36000021 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
116% over limit
Discharged 8.63000041 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Manganese, total [as Mn]
2% over limit
Discharged 4.07000019 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
4% over limit
Discharged 2.0700001 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Manganese, total [as Mn]
91% over limit
Discharged 3.82000018 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
51% over limit
Discharged 6.02000029 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Manganese, total [as Mn]
83% over limit
Discharged 3.66000017 mg/L against a permitted limit of 2.00000009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
13% over limit
Discharged 4.51000021 mg/L against a permitted limit of 4.00000019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.13 SU against a permitted limit of 6.5 SU (DAILY MN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)