Smith International Industrial Subdivision Water Supply & Sewer Services Corp — NPDES permit TX0084298: limits, due date and EPA's record

Oil And Gas Field Machinery, Houston, Texas. NPDES permit TX0084298, in force until Nov 16, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (58)

Parameter	Statistic	Limit	Months
BOD, 5-day, 20 deg. C	daily average	≤ 10 mg/L	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 25 mg/L	all year
BOD, 5-day, 20 deg. C	daily average	≤ 8.43 lb/d	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 21 lb/d	all year
Oxygen demand, chem. [high level] [COD]	daily average	≤ 100 mg/L	all year
Oxygen demand, chem. [high level] [COD]	daily maximum	≤ 200 mg/L	all year
Oxygen demand, chem. [high level] [COD]	daily average	≤ 61.7 lb/d	all year
Oxygen demand, chem. [high level] [COD]	daily maximum	≤ 123 lb/d	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	daily average	≤ 17.2 mg/L	all year
Solids, total suspended	daily maximum	≤ 42.8 mg/L	all year
Solids, total suspended	daily average	≤ 10.6 lb/d	all year
Solids, total suspended	daily maximum	≤ 26.4 lb/d	all year
Oil & Grease	daily average	≤ 12.2 mg/L	all year
Oil & Grease	daily maximum	≤ 24.5 mg/L	all year
Oil & Grease	daily average	≤ 7.53 lb/d	all year
Oil & Grease	daily maximum	≤ 15.1 lb/d	all year
Cyanide, free [amenable to chlorination]	daily average	≤ .062 mg/L	all year
Cyanide, free [amenable to chlorination]	daily maximum	≤ .138 mg/L	all year
Cyanide, free [amenable to chlorination]	daily average	≤ .038 lb/d	all year
Cyanide, free [amenable to chlorination]	daily maximum	≤ .085 lb/d	all year
Cadmium, total [as Cd]	daily average	≤ .079 mg/L	all year
Cadmium, total [as Cd]	daily maximum	≤ .183 mg/L	all year
Cadmium, total [as Cd]	daily average	≤ .048 lb/d	all year
Cadmium, total [as Cd]	daily maximum	≤ .113 lb/d	all year
Chromium, total [as Cr]	daily average	≤ .669 mg/L	all year
Chromium, total [as Cr]	daily maximum	≤ 1.248 mg/L	all year
Chromium, total [as Cr]	daily average	≤ .413 lb/d	all year
Chromium, total [as Cr]	daily maximum	≤ .77 lb/d	all year
Copper, total [as Cu]	daily average	≤ .625 mg/L	all year
Copper, total [as Cu]	daily maximum	≤ 1.32 mg/L	all year
Copper, total [as Cu]	daily average	≤ .391 lb/d	all year
Copper, total [as Cu]	daily maximum	≤ .823 lb/d	all year
Lead, total [as Pb]	daily average	≤ .48 mg/L	all year
Lead, total [as Pb]	daily maximum	≤ .92 mg/L	all year
Lead, total [as Pb]	daily average	≤ .302 lb/d	all year
Lead, total [as Pb]	daily maximum	≤ .588 lb/d	all year
Nickel, total [as Ni]	daily average	≤ 1.193 mg/L	all year
Nickel, total [as Ni]	daily maximum	≤ 2.277 mg/L	all year
Nickel, total [as Ni]	daily average	≤ .736 lb/d	all year
Nickel, total [as Ni]	daily maximum	≤ 1.406 lb/d	all year
Silver, total [as Ag]	daily average	≤ .077 mg/L	all year
Silver, total [as Ag]	daily maximum	≤ .146 mg/L	all year
Silver, total [as Ag]	daily average	≤ .047 lb/d	all year
Silver, total [as Ag]	daily maximum	≤ .09 lb/d	all year
Zinc, total [as Zn]	daily average	≤ 1.067 mg/L	all year
Zinc, total [as Zn]	daily maximum	≤ 2.085 mg/L	all year
Zinc, total [as Zn]	daily average	≤ .658 lb/d	all year
Zinc, total [as Zn]	daily maximum	≤ 1.287 lb/d	all year
Flow, in conduit or thru treatment plant	daily average	≤ .15 MGD	all year
Flow, in conduit or thru treatment plant	daily maximum	≤ .3 MGD	all year
Chlorine, total residual	monthly minimum	≥ .5 mg/L	all year
Chlorine, total residual	monthly maximum	≤ 4 mg/L	all year
E. coli	daily average	≤ 63 CFU/100mL	all year
E. coli	daily maximum	≤ 197 CFU/100mL	all year
Organics, total toxic [TTO]	daily maximum	≤ .298 mg/L	all year
Organics, total toxic [TTO]	daily maximum	≤ .184 lb/d	all year

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/TX0084298 · MCP: https://passage-data.com/mcp