Greensport/ Ship Channel Partners LP — NPDES permit TX0008524: limits, due date and EPA's record

General Warehousing And Storage, Houston, Texas. NPDES permit TX0008524, in force until Jan 6, 2028. Last 12 months: over a limit 5 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
June 2026	009	Carbon, tot organic [TOC], daily maximum	585.2 mg/L	≤ 75 mg/L	680%
June 2026	012	Copper, total [as Cu], daily average	.055 mg/L	≤ .043 mg/L	28%
June 2026	012	Copper, total [as Cu], daily maximum	.11 mg/L	≤ .091 mg/L	21%
July 2026	009	Carbon, tot organic [TOC], daily maximum	122 mg/L	≤ 75 mg/L	63%
July 2026	012	Copper, total [as Cu], daily average	.0736 mg/L	≤ .043 mg/L	71%

Limits in force (47)

Parameter	Statistic	Limit	Months	Outfall
pH	minimum	≥ 6 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Oil & Grease	daily maximum	≤ 15 mg/L	all year	001
Carbon, tot organic [TOC]	daily maximum	≤ 75 mg/L	all year	001
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
pH	minimum	≥ 6 SU	all year	002
pH	maximum	≤ 9 SU	all year	002
Oil & Grease	daily maximum	≤ 15 mg/L	all year	002
Carbon, tot organic [TOC]	daily maximum	≤ 75 mg/L	all year	002
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	002
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	002
Oxygen, dissolved [DO]	monthly minimum	≥ 2 mg/L	all year	003
BOD, 5-day, 20 deg. C	daily average	≤ 15 mg/L	all year	003
BOD, 5-day, 20 deg. C	daily maximum	≤ 30 mg/L	all year	003
BOD, 5-day, 20 deg. C	daily average	≤ 45 lb/d	all year	003
pH	minimum	≥ 6 SU	all year	003
pH	maximum	≤ 9 SU	all year	003
Solids, total suspended	daily average	≤ 15 mg/L	all year	003
Solids, total suspended	daily maximum	≤ 30 mg/L	all year	003
Solids, total suspended	daily average	≤ 45 lb/d	all year	003
Flow, in conduit or thru treatment plant	daily average	≤ .36 MGD	all year	003
Flow, in conduit or thru treatment plant	daily maximum	≤ .54 MGD	all year	003
Chlorine, total residual	monthly minimum	≥ 1 mg/L	all year	003
Chlorine, total residual	monthly maximum	≤ 4 mg/L	all year	003
Enterococci	daily average	≤ 35 CFU/100mL	all year	003
Enterococci	daily maximum	≤ 104 CFU/100mL	all year	003
pH	minimum	≥ 6 SU	all year	004
pH	maximum	≤ 9 SU	all year	004
Oil & Grease	daily maximum	≤ 15 mg/L	all year	004
Carbon, tot organic [TOC]	daily maximum	≤ 75 mg/L	all year	004
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	004
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	004
pH	minimum	≥ 6 SU	all year	009
pH	maximum	≤ 9 SU	all year	009
Oil & Grease	daily maximum	≤ 15 mg/L	all year	009
Carbon, tot organic [TOC]	daily maximum	≤ 75 mg/L	all year	009
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	009
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	009
pH	minimum	≥ 6 SU	all year	012
pH	maximum	≤ 9 SU	all year	012
Copper, total [as Cu]	daily average	≤ .043 mg/L	all year	012
Copper, total [as Cu]	daily maximum	≤ .091 mg/L	all year	012
Zinc, total [as Zn]	daily average	report only (mg/L)	all year	012
Zinc, total [as Zn]	daily maximum	report only (mg/L)	all year	012
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	012
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	012

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/TX0008524 · MCP: https://passage-data.com/mcp