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Galveston, City of

Sewage treatment plant, major discharger, Galveston, Texas. NPDES permit TX0066125, in force until Aug 21, 2030. Last 12 months: over a limit 29 times (last August 2026), 3 of 15 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (18 values), outfall TX1 form Q quarterly, outfall TXA form S twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 0 of 12 reports late

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

All 29 values over a limit
Period endingParameterReportedLimitOver by
October 2025Chlorine, total residual, monthly minimum.9 mg/L≥ 1 mg/L10%
April 2026Enterococci, daily average485.4 CFU/100mL≤ 35 CFU/100mL1287%
April 2026Enterococci, daily maximum2420 CFU/100mL≤ 104 CFU/100mL2227%
April 2026Nitrogen, ammonia total [as N], daily average4.68 mg/L≤ 3 mg/L56%
April 2026Nitrogen, ammonia total [as N], daily maximum22.9 mg/L≤ 10 mg/L129%
May 2026Nitrogen, ammonia total [as N], daily average18.2 mg/L≤ 3 mg/L507%
May 2026Nitrogen, ammonia total [as N], daily average48.2 lb/d≤ 12 lb/d302%
May 2026Nitrogen, ammonia total [as N], daily maximum27 mg/L≤ 10 mg/L170%
May 2026Solids, total suspended, daily average17.65 mg/L≤ 15 mg/L18%
May 2026Solids, total suspended, daily average73.5 lb/d≤ 63 lb/d17%
May 2026Solids, total suspended, daily maximum62.7 mg/L≤ 40 mg/L57%
June 2026Enterococci, daily maximum2420 CFU/100mL≤ 104 CFU/100mL2227%
June 2026Flow, in conduit or thru treatment plant, daily average.562 MGD≤ .5 MGD12%
June 2026Nitrogen, ammonia total [as N], daily average12.55 mg/L≤ 3 mg/L318%
June 2026Nitrogen, ammonia total [as N], daily average36.48 lb/d≤ 12 lb/d204%
June 2026Nitrogen, ammonia total [as N], daily maximum27.9 mg/L≤ 10 mg/L179%
June 2026Solids, total suspended, daily average19.32 mg/L≤ 15 mg/L29%
June 2026Solids, total suspended, daily maximum67 mg/L≤ 40 mg/L68%
July 2026BOD, carbonaceous [5 day, 20 C], daily average10.4 mg/L≤ 10 mg/L4%
July 2026Enterococci, daily average485.2 CFU/100mL≤ 35 CFU/100mL1286%
July 2026Enterococci, daily maximum2420 CFU/100mL≤ 104 CFU/100mL2227%
July 2026Nitrogen, ammonia total [as N], daily average25.2 mg/L≤ 3 mg/L740%
July 2026Nitrogen, ammonia total [as N], daily average81.5 lb/d≤ 12 lb/d579%
July 2026Nitrogen, ammonia total [as N], daily maximum32.6 mg/L≤ 10 mg/L226%
August 2026Enterococci, daily average266.4 CFU/100mL≤ 35 CFU/100mL661%
August 2026Enterococci, daily maximum1010 CFU/100mL≤ 104 CFU/100mL871%
August 2026Nitrogen, ammonia total [as N], daily average12.8 lb/d≤ 12 lb/d7%
August 2026Nitrogen, ammonia total [as N], daily average5.5 mg/L≤ 3 mg/L83%
August 2026Nitrogen, ammonia total [as N], daily maximum21.3 mg/L≤ 10 mg/L113%

Limits in force (50)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimum≥ 4 mg/Lall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendeddaily average≤ 15 mg/Lall year001
Solids, total suspendeddaily maximum≤ 40 mg/Lall year001
Solids, total suspendeddaily average≤ 63 lb/dall year001
Nitrogen, ammonia total [as N]daily average≤ 3 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/Lall year001
Nitrogen, ammonia total [as N]daily average≤ 12 lb/dall year001
Flow, in conduit or thru treatment plantdaily average≤ .5 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualmonthly minimum≥ 1 mg/Lall year001
Chlorine, total residualmonthly maximum≤ 4 mg/Lall year001
Enterococcidaily average≤ 35 CFU/100mLall year001
Enterococcidaily maximum≤ 104 CFU/100mLall year001
BOD, carbonaceous [5 day, 20 C]daily average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily average≤ 42 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
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7-day minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)monthly average minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (pass=0;fail=1)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (%)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (pass=0;fail=1)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (%)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllinamonthly average minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina7-day minimumreport only (%)all yearTX1
LOEC Sub-Lethal Growth 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 beryllinasingle samplereport only (pass=0;fail=1)all yearTXA

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TX0066125 · MCP: https://passage-data.com/mcp