Harris County Mud 8 — NPDES permit TX0075698: limits, due date and EPA's record

Sewage treatment plant, Houston, Texas. NPDES permit TX0075698, in force until Feb 14, 2029. Last 12 months: no values over a limit, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (21)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	monthly minimum	≥ 4 mg/L	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	daily average	≤ 15 mg/L	all year
Solids, total suspended	daily maximum	≤ 40 mg/L	all year
Solids, total suspended	daily average	≤ 104 lb/d	all year
Nitrogen, ammonia total [as N]	daily average	≤ 3 mg/L	Apr–Oct
Nitrogen, ammonia total [as N]	daily average	≤ 5 mg/L	Jan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]	daily maximum	≤ 10 mg/L	Apr–Oct
Nitrogen, ammonia total [as N]	daily maximum	≤ 10 mg/L	Jan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]	daily average	≤ 21 lb/d	Apr–Oct
Nitrogen, ammonia total [as N]	daily average	≤ 35 lb/d	Jan, Feb, Mar, Nov, Dec
Flow, in conduit or thru treatment plant	daily average	≤ .835 MGD	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Chlorine, total residual	monthly minimum	≥ 1 mg/L	all year
Chlorine, total residual	monthly maximum	≤ 4 mg/L	all year
Enterococci	daily average	≤ 35 MPN/100mL	all year
Enterococci	daily maximum	≤ 104 MPN/100mL	all year
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 10 mg/L	all year
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 25 mg/L	all year
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 70 lb/d	all year

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/TX0075698 · MCP: https://passage-data.com/mcp