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

Gulf Coast Authority

Sewage treatment plant, major discharger, Galveston County, Texas. NPDES permit TX0057843 expired Jul 26, 2026; its limits still apply. Last 12 months: over a limit once (last January 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 26 days after each period: outfall 001 form A monthly (72 values), outfall TX1 form Q quarterly (20 values), outfall 001 form Q quarterly, outfall 001 form Y yearly, outfall TXA form S twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 1 required value missing, 1 of 23 reports late

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

Period endingParameterReportedLimitOver by
January 2026Enterococci, daily maximum144 CFU/100mL≤ 104 CFU/100mL38%

Limits in force (192)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendeddaily averagereport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendeddaily average≤ 4233 lb/dall year001
Solids, total suspendeddaily maximum≤ 13692 lb/dall year001
Oil & Greasedaily averagereport only (mg/L)all year001
Oil & Greasedaily maximumreport only (mg/L)all year001
Oil & Greasedaily average≤ 655 lb/dall year001
Oil & Greasedaily maximum≤ 1308 lb/dall year001
Nitrogen, ammonia total [as N]daily averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily average≤ 262 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 902 lb/dall year001
Carbon, tot organic [TOC]daily averagereport only (mg/L)all year001
Carbon, tot organic [TOC]daily maximumreport only (mg/L)all year001
Carbon, tot organic [TOC]daily average≤ 15167 lb/dall year001
Carbon, tot organic [TOC]daily maximum≤ 23000 lb/dall year001
Arsenic, total [as As]daily averagereport only (mg/L)all year001
Arsenic, total [as As]daily maximumreport only (mg/L)all year001
Arsenic, total [as As]daily average≤ 8.736 lb/dall year001
Arsenic, total [as As]daily maximum≤ 18.48 lb/dall year001
Chromium, total [as Cr]daily averagereport only (mg/L)all year001
Chromium, total [as Cr]daily maximumreport only (mg/L)all year001
Chromium, total [as Cr]daily average≤ 28.1 lb/dall year001
Chromium, total [as Cr]daily maximum≤ 67.2 lb/dall year001
Copper, total [as Cu]daily averagereport only (mg/L)all year001
Copper, total [as Cu]daily maximumreport only (mg/L)all year001
Copper, total [as Cu]daily average≤ .9119 lb/dall year001
Copper, total [as Cu]daily maximum≤ 1.929 lb/dall year001
Iron, total [as Fe]daily average≤ 74.4 lb/dall year001
Iron, total [as Fe]daily maximum≤ 109 lb/dall year001
Zinc, total [as Zn]daily averagereport only (mg/L)all year001
Zinc, total [as Zn]daily maximumreport only (mg/L)all year001
Zinc, total [as Zn]daily average≤ 6.72 lb/dall year001
Zinc, total [as Zn]daily maximum≤ 12.2 lb/dall year001
Carbon tetrachloridedaily average≤ .9496 lb/dall year001
Carbon tetrachloridedaily maximum≤ 2.008 lb/dall year001
1,2-Dichloroethanedaily average≤ 4.05 lb/dall year001
1,2-Dichloroethanedaily maximum≤ 12.57 lb/dall year001
Chloroformdaily average≤ 1.25 lb/dall year001
Chloroformdaily maximum≤ 2.74 lb/dall year001
Toluenedaily average≤ 1.55 lb/dall year001
Toluenedaily maximum≤ 4.77 lb/dall year001
Benzenedaily average≤ 2.2 lb/dall year001
Benzenedaily maximum≤ 8.1 lb/dall year001
Acenaphthylenedaily average≤ 1.31 lb/dall year001
Acenaphthylenedaily maximum≤ 3.52 lb/dall year001
Acenaphthenedaily average≤ 1.31 lb/dall year001
Acenaphthenedaily maximum≤ 3.52 lb/dall year001
Acrylonitriledaily average≤ 1.237 lb/dall year001
Acrylonitriledaily maximum≤ 2.618 lb/dall year001
Anthracenedaily average≤ 1.31 lb/dall year001
Anthracenedaily maximum≤ 3.52 lb/dall year001
Benzo[b]fluoranthenedaily average≤ 1.37 lb/dall year001
Benzo[b]fluoranthenedaily maximum≤ 3.64 lb/dall year001
Benzo[k]fluoranthenedaily average≤ 1.31 lb/dall year001
Benzo[k]fluoranthenedaily maximum≤ 3.52 lb/dall year001
Benzo[a]pyrenedaily average≤ .003 lb/dall year001
Benzo[a]pyrenedaily maximum≤ .006 lb/dall year001
Chlorobenzenedaily average≤ .89 lb/dall year001
Chlorobenzenedaily maximum≤ 1.67 lb/dall year001
Chrysenedaily average≤ .9156 lb/dall year001
Chrysenedaily maximum≤ 1.9372 lb/dall year001
Diethyl phthalatedaily average≤ 4.83 lb/dall year001
Diethyl phthalatedaily maximum≤ 12.1 lb/dall year001
Dimethyl phthalatedaily average≤ 1.13 lb/dall year001
Dimethyl phthalatedaily maximum≤ 2.8 lb/dall year001
Ethylbenzenedaily average≤ 1.91 lb/dall year001
Ethylbenzenedaily maximum≤ 6.44 lb/dall year001
Fluoranthenedaily average≤ 1.49 lb/dall year001
Fluoranthenedaily maximum≤ 4.05 lb/dall year001
Fluorenedaily average≤ 1.31 lb/dall year001
Fluorenedaily maximum≤ 3.52 lb/dall year001
Hexachlorobutadienedaily average≤ .245 lb/dall year001
Hexachlorobutadienedaily maximum≤ .52 lb/dall year001
Hexachloroethanedaily average≤ 1.25 lb/dall year001
Hexachloroethanedaily maximum≤ 3.22 lb/dall year001
Methyl chloride [Chloromethane]daily average≤ 5.12 lb/dall year001
Methyl chloride [Chloromethane]daily maximum≤ 11.32 lb/dall year001
Methylene chloridedaily average≤ 2.38 lb/dall year001
Methylene chloridedaily maximum≤ 5.3 lb/dall year001
Nitrobenzenedaily average≤ 1.61 lb/dall year001
Nitrobenzenedaily maximum≤ 4.05 lb/dall year001
Phenanthrenedaily average≤ .4514 lb/dall year001
Phenanthrenedaily maximum≤ .9551 lb/dall year001
Pyrenedaily average≤ 1.49 lb/dall year001
Pyrenedaily maximum≤ 3.99 lb/dall year001
Tetrachloroethylenedaily average≤ 1.31 lb/dall year001
Tetrachloroethylenedaily maximum≤ 3.34 lb/dall year001
1,1-Dichloroethanedaily average≤ 1.31 lb/dall year001
1,1-Dichloroethanedaily maximum≤ 3.52 lb/dall year001
1,1-Dichloroethylenedaily average≤ .6613 lb/dall year001
1,1-Dichloroethylenedaily maximum≤ 1.399 lb/dall year001
1,1,1-Trichloroethanedaily average≤ 1.25 lb/dall year001
1,1,1-Trichloroethanedaily maximum≤ 3.22 lb/dall year001
1,1,2-Trichloroethanedaily average≤ 1.25 lb/dall year001
1,1,2-Trichloroethanedaily maximum≤ 3.22 lb/dall year001
Benzo[a]anthracenedaily average≤ .028 lb/dall year001
Benzo[a]anthracenedaily maximum≤ .059 lb/dall year001
1,2-Dichlorobenzenedaily average≤ 4.59 lb/dall year001
1,2-Dichlorobenzenedaily maximum≤ 9.71 lb/dall year001
1,2-Dichloropropanedaily average≤ 9.12 lb/dall year001
1,2-Dichloropropanedaily maximum≤ 13.71 lb/dall year001
trans-1,2-Dichloroethylenedaily average≤ 1.25 lb/dall year001
trans-1,2-Dichloroethylenedaily maximum≤ 3.22 lb/dall year001
1,2,4-Trichlorobenzenedaily average≤ 4.05 lb/dall year001
1,2,4-Trichlorobenzenedaily maximum≤ 8.34 lb/dall year001
1,3-Dichlorobenzenedaily average≤ 1.85 lb/dall year001
1,3-Dichlorobenzenedaily maximum≤ 2.62 lb/dall year001
1,4-Dichlorobenzenedaily average≤ .89 lb/dall year001
1,4-Dichlorobenzenedaily maximum≤ 1.67 lb/dall year001
2-Chlorophenoldaily average≤ 1.85 lb/dall year001
2-Chlorophenoldaily maximum≤ 5.84 lb/dall year001
2-Nitrophenoldaily average≤ 2.44 lb/dall year001
2-Nitrophenoldaily maximum≤ 4.11 lb/dall year001
2,4-Dichlorophenoldaily average≤ 2.32 lb/dall year001
2,4-Dichlorophenoldaily maximum≤ 6.67 lb/dall year001
2,4-Dimethylphenoldaily average≤ 1.07 lb/dall year001
2,4-Dimethylphenoldaily maximum≤ 2.15 lb/dall year001
2,4-Dinitrotoluenedaily average≤ 6.73 lb/dall year001
2,4-Dinitrotoluenedaily maximum≤ 16.98 lb/dall year001
2,4-Dinitrophenoldaily average≤ 4.23 lb/dall year001
2,4-Dinitrophenoldaily maximum≤ 7.33 lb/dall year001
2,6-Dinitrotoluenedaily average≤ 15.2 lb/dall year001
2,6-Dinitrotoluenedaily maximum≤ 38.2 lb/dall year001
4-Nitrophenoldaily average≤ 4.29 lb/dall year001
4-Nitrophenoldaily maximum≤ 7.39 lb/dall year001
4,6-Dinitro-o-cresoldaily average≤ 4.65 lb/dall year001
4,6-Dinitro-o-cresoldaily maximum≤ 16.51 lb/dall year001
Phenoldaily average≤ 1.05 lb/dall year001
Phenoldaily maximum≤ 1.82 lb/dall year001
Naphthalenedaily average≤ 1.54 lb/dall year001
Naphthalenedaily maximum≤ 4.14 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily average≤ 6.14 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 16.6 lb/dall year001
Di-n-butyl phthalatedaily average≤ 1.61 lb/dall year001
Di-n-butyl phthalatedaily maximum≤ 3.4 lb/dall year001
Vinyl chloridedaily average≤ 6.2 lb/dall year001
Vinyl chloridedaily maximum≤ 15.97 lb/dall year001
Trichloroethylenedaily average≤ 1.04 lb/dall year001
Trichloroethylenedaily maximum≤ 2.67 lb/dall year001
Hexachlorobenzenedaily average≤ .0008 lb/dall year001
Hexachlorobenzenedaily maximum≤ .0016 lb/dall year001
Flow, in conduit or thru treatment plantdaily average≤ 15.7 MGDall year001
Flow, in conduit or thru treatment plantdaily maximum≤ 31 MGDall year001
Chlorine, free availabledaily average≤ .721 lb/dall year001
Chlorine, free availabledaily maximum≤ 1.8 lb/dall year001
1,3-Dichloropropylenedaily average≤ 1.73 lb/dall year001
1,3-Dichloropropylenedaily maximum≤ 2.62 lb/dall year001
Enterococcidaily average≤ 35 CFU/100mLall year001
Enterococcidaily maximum≤ 104 CFU/100mLall year001
Pyridinedaily average≤ 1.31 lb/dall year001
Pyridinedaily maximum≤ 3.78 lb/dall year001
Anilinedaily average≤ .92 lb/dall year001
Anilinedaily maximum≤ 1.47 lb/dall year001
p-Cresoldaily average≤ .86 lb/dall year001
p-Cresoldaily maximum≤ 1.47 lb/dall year001
Benzoic acids, totaldaily average≤ 4.34 lb/dall year001
Benzoic acids, totaldaily maximum≤ 7.27 lb/dall year001
.alpha.-Terpineoldaily average≤ .98 lb/dall year001
.alpha.-Terpineoldaily maximum≤ 2.02 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily averagereport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year001
BOD, carbonaceous [5 day, 20 C]daily average≤ 2620 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 5896 lb/dall year001
Chloroethanedaily average≤ 6.2 lb/dall year001
Chloroethanedaily maximum≤ 15.97 lb/dall year001
Whole effluent toxicity - retest #17-day minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #1monthly average minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #27-day minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #2monthly average minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7-day minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)monthly average minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (M. bahia)7-day minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (M. bahia)monthly average minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (pass=0;fail=1)all yearTX1
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (pass=0;fail=1)all yearTX1
IC25 Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
IC25 Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
IC25 Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (%)all yearTX1
IC25 Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (%)all yearTX1
IC25 Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
IC25 Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
IC25 Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (%)all yearTX1
IC25 Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (%)all yearTX1
Whole effluent toxicity - retest #1single samplereport only (pass=0;fail=1)all yearTXA
Whole effluent toxicity - retest #2single samplereport only (pass=0;fail=1)all yearTXA
LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)single samplereport only (pass=0;fail=1)all yearTXA
LC50 Pass/Fail Static 24Hr Acute Menidia menidiasingle samplereport only (pass=0;fail=1)all yearTXA

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/TX0057843 · MCP: https://passage-data.com/mcp