Guadalupe-Blanco River Authority — NPDES permit TX0025208: limits, due date and EPA's record

Sewage treatment plant, Seguin, Texas. NPDES permit TX0025208, in force until Dec 16, 2029. Last 12 months: over a limit 2 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

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

Period ending	Outfall	Parameter	Reported	Limit	Over by
July 2026	001	Flow, in conduit or thru treatment plant, daily average	.991 MGD	≤ .95 MGD	4%
July 2026	101	Flow, in conduit or thru treatment plant, daily average	.991 MGD	≤ .95 MGD	4%

Limits in force (40)

Parameter	Statistic	Limit	Months	Outfall
Oxygen, dissolved [DO]	monthly minimum	≥ 4 mg/L	all year	001
pH	minimum	≥ 6 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Solids, total suspended	daily average	≤ 15 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 40 mg/L	all year	001
Solids, total suspended	daily average	≤ 119 lb/d	all year	001
Nitrogen, ammonia total [as N]	daily average	≤ 2 mg/L	all year	001
Nitrogen, ammonia total [as N]	daily maximum	≤ 10 mg/L	all year	001
Nitrogen, ammonia total [as N]	daily average	≤ 16 lb/d	all year	001
Phosphorus, total [as P]	daily average	≤ 1 mg/L	all year	001
Phosphorus, total [as P]	daily maximum	≤ 3 mg/L	all year	001
Phosphorus, total [as P]	daily average	≤ 7.9 lb/d	all year	001
Flow, in conduit or thru treatment plant	daily average	≤ .95 MGD	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
E. coli	daily average	≤ 126 CFU/100mL	all year	001
E. coli	daily maximum	≤ 399 CFU/100mL	all year	001
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 10 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 25 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 79 lb/d	all year	001
Oxygen, dissolved [DO]	monthly minimum	≥ 4 mg/L	all year	002
pH	minimum	≥ 6 SU	all year	002
pH	maximum	≤ 9 SU	all year	002
Solids, total suspended	daily average	≤ 15 mg/L	all year	002
Solids, total suspended	daily maximum	≤ 40 mg/L	all year	002
Solids, total suspended	daily average	≤ 119 lb/d	all year	002
Nitrogen, ammonia total [as N]	daily average	≤ 2 mg/L	all year	002
Nitrogen, ammonia total [as N]	daily maximum	≤ 10 mg/L	all year	002
Nitrogen, ammonia total [as N]	daily average	≤ 16 lb/d	all year	002
Phosphorus, total [as P]	daily average	≤ 1 mg/L	all year	002
Phosphorus, total [as P]	daily maximum	≤ 3 mg/L	all year	002
Phosphorus, total [as P]	daily average	≤ 7.9 lb/d	all year	002
Flow, in conduit or thru treatment plant	daily average	≤ .95 MGD	all year	002
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	002
E. coli	daily average	≤ 126 CFU/100mL	all year	002
E. coli	daily maximum	≤ 399 CFU/100mL	all year	002
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 10 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 25 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 79 lb/d	all year	002
Flow, in conduit or thru treatment plant	daily average	≤ .95 MGD	all year	101
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	101

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/TX0025208 · MCP: https://passage-data.com/mcp