CHEMOURS BELLE PLANT
NPDES ID: WV0002399
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.
Violations
April 30, 2026
Carbon, tot organic [TOC]
334% over limit
Discharged 17.365 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Carbon, tot organic [TOC]
247% over limit
Discharged 17.365 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Carbon, tot organic [TOC]
25% over limit
Discharged 5 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Carbon, tot organic [TOC]
1547% over limit
Discharged 82.364 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Carbon, tot organic [TOC]
1959% over limit
Discharged 82.364 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Carbon, tot organic [TOC]
337% over limit
Discharged 21.865 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Carbon, tot organic [TOC]
447% over limit
Discharged 21.865 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
0% over limit
Discharged 1.323 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 2.27272398 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 5.006 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Zinc, total recoverable
0% over limit
Discharged 0.0507 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Chloride [as Cl]
0% over limit
Discharged 509 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Chloride [as Cl]
0% over limit
Discharged 1330 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0.00577 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0.00563 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.60064199 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Cyanide, free [amenable to chlorination]
65% over limit
Discharged 0.43 mg/L against a permitted limit of 0.26 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Zinc, total recoverable
0% over limit
Discharged 0.0413 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, nitrite total [as N]
0% over limit
Discharged 0.15 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, nitrite total [as N]
0% over limit
Discharged 0.25 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Cyanide, free [amenable to chlorination]
455% over limit
Discharged 2.22 mg/L against a permitted limit of 0.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Coliform, fecal general
104% over limit
Discharged 407 MPN/100mL against a permitted limit of 200 MPN/100mL (MO AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
200% over limit
Discharged 1200 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Coliform, fecal general
25% over limit
Discharged 500 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Temperature, water deg. fahrenheit
4% over limit
Discharged 96.4 deg F against a permitted limit of 93 deg F (DAILY AV)
DMR, Limited - Numeric Violation
Coliform, fecal general
150% over limit
Discharged 500 MPN/100mL against a permitted limit of 200 MPN/100mL (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Oil and grease, hexane extr method
0% over limit
Discharged 1.15 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Iron, total recoverable
0% over limit
Discharged 0.251 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Temperature, water deg. fahrenheit
1% over limit
Discharged 94.1 deg F against a permitted limit of 93 deg F (DAILY AV)
DMR, Limited - Numeric Violation
Iron, total recoverable
0% over limit
Discharged 0.251 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 7.5 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.06 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Aluminum, total recoverable
0% over limit
Discharged 0.276 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Oil and grease, hexane extr method
0% over limit
Discharged 1.15 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.06 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7.26 SU against a permitted limit of 0 SU (INST MIN)
DMR, Monitor Only - Overdue
Carbon, tot organic [TOC]
0% over limit
Discharged 0.71 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 7.5 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Temperature, water deg. fahrenheit
0% over limit
Discharged 77.9 deg F against a permitted limit of 0 deg F (MO AVG)
DMR, Monitor Only - Overdue
Carbon, tot organic [TOC]
0% over limit
Discharged 0.71 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Aluminum, total recoverable
0% over limit
Discharged 0.276 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7.26 SU against a permitted limit of 0 SU (INST MAX)
DMR, Monitor Only - Overdue
Temperature, water deg. fahrenheit
0% over limit
Discharged 77.9 deg F against a permitted limit of 0 deg F (DAILY MX)
DMR, Monitor Only - Overdue
January 31, 2025
Carbon, tot organic [TOC]
26% over limit
Discharged 6.3 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Carbon, tot organic [TOC]
33% over limit
Discharged 6.67 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
Carbon, tot organic [TOC]
18% over limit
Discharged 5.9 mg/L against a permitted limit of 5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Temperature, water deg. fahrenheit
2% over limit
Discharged 94.6 deg F against a permitted limit of 93 deg F (DAILY AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)