Laredo, City of — NPDES permit TX0126926: limits, due date and EPA's record

Sewage treatment plant, major discharger, Laredo, Texas. NPDES permit TX0126926, in force until Feb 3, 2030. Last 12 months: over a limit 2 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

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

Period ending	Parameter	Reported	Limit	Over by
August 2026	Nitrogen, ammonia total [as N], daily average	6.33 mg/L	≤ 2 mg/L	217%
August 2026	Nitrogen, ammonia total [as N], single grab sample	25.2 mg/L	≤ 15 mg/L	68%

Limits in force (42)

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	single grab sample	≤ 60 mg/L	all year	001
Solids, total suspended	daily average	≤ 45 lb/d	all year	001
Nitrogen, ammonia total [as N]	daily average	≤ 2 mg/L	all year	001
Nitrogen, ammonia total [as N]	single grab sample	≤ 15 mg/L	all year	001
Nitrogen, ammonia total [as N]	daily average	≤ 6 lb/d	all year	001
Flow, in conduit or thru treatment plant	daily average	≤ .36 MGD	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Chlorine, total residual	monthly minimum	≥ 1 mg/L	all year	001
Chlorine, total residual	monthly maximum	≤ 4 mg/L	all year	001
E. coli	daily average	≤ 126 MPN/100mL	all year	001
E. coli	single grab sample	≤ 399 MPN/100mL	all year	001
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 7 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	single grab sample	≤ 32 mg/L	all year	001
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 21 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	single grab sample	≤ 60 mg/L	all year	002
Solids, total suspended	daily average	≤ 45 lb/d	all year	002
Nitrogen, ammonia total [as N]	daily average	≤ 2 mg/L	all year	002
Nitrogen, ammonia total [as N]	single grab sample	≤ 15 mg/L	all year	002
Nitrogen, ammonia total [as N]	daily average	≤ 6 lb/d	all year	002
Sulfate, total [as SO4]	daily average	report only (mg/L)	all year	002
Sulfate, total [as SO4]	single grab sample	report only (mg/L)	all year	002
Sulfate, total [as SO4]	daily average	report only (lb/d)	all year	002
Flow, in conduit or thru treatment plant	daily average	≤ .36 MGD	all year	002
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	002
Chlorine, total residual	monthly minimum	≥ 1 mg/L	all year	002
Chlorine, total residual	monthly maximum	≤ 4 mg/L	all year	002
E. coli	daily average	≤ 126 MPN/100mL	all year	002
E. coli	single grab sample	≤ 399 MPN/100mL	all year	002
Solids, total dissolved	daily average	report only (mg/L)	all year	002
Solids, total dissolved	single grab sample	report only (mg/L)	all year	002
Solids, total dissolved	daily average	report only (lb/d)	all year	002
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 7 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	single grab sample	≤ 32 mg/L	all year	002
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 21 lb/d	all year	002

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/TX0126926 · MCP: https://passage-data.com/mcp