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NPDES NC0004987 · Clean Water Act

MARSHALL STEAM STATION, Terrell, NC: NPDES NC0004987 discharge permit, effluent exceedances, inspections, penalties

MARSHALL STEAM STATION, Terrell, North Carolina: Individual permit NC0004987, held by Duke Energy Carolinas LLC; Effective; issued April 11, 2022, term to April 30, 2027; Fossil Fuel Electric Power Generation.

1 of the 33 pollutants listed for NPDES NC0004987 have no violation or effluent exceedance.

  • Iron, total [as Fe]: 3 limits, 29 violations of any kind, 23 effluent exceedances, latest October 31, 2025, largest 262% over the limit.
  • Copper, total [as Cu]: 3 limits, 10 violations of any kind, 4 effluent exceedances, latest May 31, 2026, largest 520% over the limit.
  • pH: 4 limits, 9 violations of any kind, 1 effluent exceedance, latest March 31, 2008.
  • Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia: 1 limit, 148 violations of any kind.
  • Arsenic, total [as As]: 5 limits, 74 violations of any kind.
  • Selenium, total [as Se]: 4 limits, 74 violations of any kind.
  • Mercury, total [as Hg]: 4 limits, 74 violations of any kind.
  • Hardness, total [as CaCO3]: 3 limits, 74 violations of any kind.
  • Chromium, total [as Cr]: 2 limits, 73 violations of any kind.
  • Solids, total dissolved: 2 limits, 73 violations of any kind.
  • Bromide [as Br]: 3 limits, 72 violations of any kind.
  • Turbidity: 3 limits, 71 violations of any kind.
  • Cadmium, dissolved [as Cd]: 2 limits, 70 violations of any kind.
  • Copper, dissolved [as Cu]: 2 limits, 70 violations of any kind.
  • Lead, dissolved [as Pb]: 2 limits, 70 violations of any kind.
  • Zinc, dissolved [as Zn]: 2 limits, 70 violations of any kind.
  • Solids, total suspended: 4 limits, 8 violations of any kind.
  • Oil & Grease: 4 limits, 8 violations of any kind.
  • Temperature, water deg. centigrade: 3 limits, 6 violations of any kind.
  • Chlorine, free available: 2 limits, 5 violations of any kind.
  • Conductivity: 1 limit, 3 violations of any kind.
  • Chloride [as Cl]: 0 limits, 3 violations of any kind.
  • Sulfate, total [as SO4]: 0 limits, 3 violations of any kind.
  • Fluoride, total [as F]: 0 limits, 3 violations of any kind.
  • Cadmium, total [as Cd]: 0 limits, 3 violations of any kind.
  • Lead, total [as Pb]: 0 limits, 3 violations of any kind.
  • Nickel, total [as Ni]: 0 limits, 3 violations of any kind.
  • Zinc, total [as Zn]: 0 limits, 3 violations of any kind.
  • Nitrite + Nitrate total [as N]: 0 limits, 2 violations of any kind.
  • Barium, total [as Ba]: 0 limits, 2 violations of any kind.
  • Manganese, total [as Mn]: 0 limits, 2 violations of any kind.
  • Silver, total [as Ag]: 0 limits, 1 violation of any kind.
  • Flow, in conduit or thru treatment plant: 4 limits.

Other permits held by Duke Energy Carolinas LLC

MARSHALL STEAM STATION among its neighbors

54 discharge permits are in the Irish Buffalo Creek subwatershed (HUC 030401050203); NC0004987 is one.

Other permits in the Irish Buffalo Creek subwatershed (HUC 030401050203)

Identity

FacilityMARSHALL STEAM STATION
PermitteeDuke Energy Carolinas LLC
NPDES IDNC0004987
StatusEffective
TypeIndividual permit
ClassMajor
Facility typeNon-POTW
IssuedApril 11, 2022
ExpiresApril 30, 2027
AddressTerrell, NC 28682
SubwatershedIrish Buffalo Creek (HUC 030401050203)
NAICS221112 – Fossil Fuel Electric Power Generation
SIC4911 – Electric Services
Other EPA IDs (FRS)RCRA handler NCD043678879; ICIS-AIR source NC0000003701800073

NPDES NC0004987: effluent limits and exceedances

MARSHALL STEAM STATION (NPDES NC0004987): 33 pollutants on file, 22 limited; 32 with a violation of any kind, 3 with an exceedance.

How exceedances are counted.

PollutantLimitsViolationsExceedancesLatestLargest, as filed
Iron, total [as Fe]32923October 31, 2025262% over the limit
Copper, total [as Cu]3104May 31, 2026520% over the limit
pH491March 31, 2008
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia11480
Arsenic, total [as As]5740
Selenium, total [as Se]4740
Mercury, total [as Hg]4740
Hardness, total [as CaCO3]3740
Chromium, total [as Cr]2730
Solids, total dissolved2730
Bromide [as Br]3720
Turbidity3710
Cadmium, dissolved [as Cd]2700
Copper, dissolved [as Cu]2700
Lead, dissolved [as Pb]2700
Zinc, dissolved [as Zn]2700
Solids, total suspended480
Oil & Grease480
Temperature, water deg. centigrade360
Chlorine, free available250
Conductivity130
Chloride [as Cl]030
Sulfate, total [as SO4]030
Fluoride, total [as F]030
Cadmium, total [as Cd]030
Lead, total [as Pb]030
Nickel, total [as Ni]030
Zinc, total [as Zn]030
Nitrite + Nitrate total [as N]020
Barium, total [as Ba]020
Manganese, total [as Mn]020
Silver, total [as Ag]010
Flow, in conduit or thru treatment plant400

NPDES NC0004987: inspections, violations and enforcement

NPDES NC0004987 (MARSHALL STEAM STATION): no single-event violation, inspection, formal enforcement action and informal enforcement action on file.

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Permits near NPDES NC0004987

NPDES NC0004987: 33 pollutant rows, 0 dated events; ICIS-NPDES download, loaded October 14, 2026.