Oklaunion Power Station LLC — NPDES permit TX0087815: limits, due date and EPA's record

Electric Services, major discharger, Vernon, Texas. NPDES permit TX0087815, in force until Dec 17, 2026. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (22)

Parameter	Statistic	Limit	Months
Oxygen demand, chem. [high level] [COD]	daily maximum	≤ 200 mg/L	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	daily maximum	≤ 50 mg/L	all year
Oil & Grease	daily maximum	≤ 15 mg/L	all year
Arsenic, total [as As]	daily maximum	≤ .3 mg/L	all year
Barium, total [as Ba]	daily maximum	≤ 4 mg/L	all year
Cadmium, total [as Cd]	daily maximum	≤ .00907 mg/L	all year
Chromium, total [as Cr]	daily maximum	≤ 5 mg/L	all year
Copper, total [as Cu]	daily maximum	≤ .426 mg/L	all year
Lead, total [as Pb]	daily maximum	≤ .311 mg/L	all year
Manganese, total [as Mn]	daily maximum	≤ 3 mg/L	all year
Nickel, total [as Ni]	daily maximum	≤ 1.937 mg/L	all year
Silver, total [as Ag]	daily maximum	≤ .0507 mg/L	all year
Zinc, total [as Zn]	daily maximum	≤ 4.7 mg/L	all year
Selenium, total [as Se]	daily maximum	≤ .0119 mg/L	all year
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
E. coli	daily average	report only (CFU/100mL)	all year
E. coli	daily maximum	report only (CFU/100mL)	all year
Solids, total dissolved	daily maximum	≤ 5000 mg/L	all year
Mercury, total [as Hg]	daily maximum	≤ .0031 mg/L	all year

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/TX0087815 · MCP: https://passage-data.com/mcp