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Bishop Cisd

Sewage treatment plant, Petronila, Texas. NPDES permit TX0069884, in force until Dec 19, 2028. Last 12 months: over a limit 6 times (last March 2026), 1 required value missing, 1 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 21 days after each period: form A monthly (13 values), form Q quarterly (2 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 5 values over a limit, 0 required values missing, 0 of 16 reports late

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

Period ending	Parameter	Reported	Limit	Over by
November 2025	Solids, total suspended, daily average	2.03 lb/d	≤ 1.3 lb/d	56%
November 2025	Solids, total suspended, daily average	52 mg/L	≤ 20 mg/L	160%
November 2025	Solids, total suspended, single grab sample	160 mg/L	≤ 65 mg/L	146%
December 2025	Solids, total suspended, daily average	77 mg/L	≤ 20 mg/L	285%
December 2025	Solids, total suspended, single grab sample	190 mg/L	≤ 65 mg/L	192%
March 2026	Chlorine, total residual, monthly minimum	.97 mg/L	≥ 1 mg/L	3%

Limits in force (15)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	monthly minimum	≥ 2 mg/L	all year
BOD, 5-day, 20 deg. C	daily average	≤ 20 mg/L	all year
BOD, 5-day, 20 deg. C	single grab sample	≤ 65 mg/L	all year
BOD, 5-day, 20 deg. C	daily average	≤ 1.3 lb/d	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	daily average	≤ 20 mg/L	all year
Solids, total suspended	single grab sample	≤ 65 mg/L	all year
Solids, total suspended	daily average	≤ 1.3 lb/d	all year
Flow, in conduit or thru treatment plant	daily average	≤ .008 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
E. coli	daily average	≤ 126 CFU/100mL	all year
E. coli	single grab sample	≤ 399 CFU/100mL	all year

How strict are these limits?

BOD, 5-day, 20 deg. C, single grab sample 65 mg/L — stricter than 34% of 310 other minor POTWs in Texas; 45% have the same limit
BOD, 5-day, 20 deg. C, daily average 20 mg/L — stricter than 33% of 340 other minor POTWs in Texas; 44% have the same limit
Solids, total suspended, daily average 20 mg/L — stricter than 17% of 939 other minor POTWs in Texas; 18% have the same limit

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TX0069884 · MCP: https://passage-data.com/mcp