Passage Data · Check a report · Use it from your AI

Undine Texas Environmental LLC

Sewerage Systems, Harris County, Texas. NPDES permit TX0100935, in force until Feb 20, 2031. Last 12 months: over a limit 4 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (25 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 1 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
January 2026Enterococci, single grab sample9800 CFU/100mL≤ 104 CFU/100mL9323%
January 2026Nitrogen, ammonia total [as N], daily average5.06 mg/L≤ 5 mg/L1%
January 2026Nitrogen, ammonia total [as N], daily maximum30.4 mg/L≤ 15 mg/L103%
August 2026Oil & Grease, daily maximum19.5 mg/L≤ 15 mg/L30%

Limits in force (27)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 4 mg/Lall year
BOD, 5-day, 20 deg. Cdaily average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 25 mg/Lall year
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily average≤ 15 mg/Lall year
Solids, total suspendeddaily maximum≤ 40 mg/Lall year
Oil & Greasedaily maximum≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]daily average≤ 3 mg/LApr–Oct
Nitrogen, ammonia total [as N]daily average≤ 5 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/LApr–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 15 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, Kjeldahl, total [as N]daily averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year
Copper, total [as Cu]daily average≤ .043 mg/Lall year
Copper, total [as Cu]daily maximum≤ .091 mg/Lall year
Silver, total [as Ag]daily average≤ .007 mg/Lall year
Silver, total [as Ag]daily maximum≤ .015 mg/Lall year
Zinc, total [as Zn]daily average≤ .24 mg/Lall year
Zinc, total [as Zn]daily maximum≤ .509 mg/Lall year
Flow, in conduit or thru treatment plantdaily average≤ .03 MGDall year
Flow, in conduit or thru treatment plantdaily maximum≤ .1 MGDall year
Chlorine, total residualmonthly minimum≥ 1 mg/Lall year
Chlorine, total residualmonthly maximum≤ 4 mg/Lall year
Enterococcidaily average≤ 35 CFU/100mLall year
Enterococcidaily maximum≤ 104 CFU/100mLall year

How strict are these limits?

Cited limits by parameter: Texas's rules and the federal ones.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TX0100935 · MCP: https://passage-data.com/mcp