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Fort Bend County Mud 23

Sewage treatment plant, major discharger, Fresno, Texas. NPDES permit TX0074233, in force until Dec 20, 2028. Last 12 months: over a limit 22 times (last September 2026), 4 required values missing, 1 of 17 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (26 values), outfall TX1 form Q quarterly (30 values), outfall TXA form S twice a year
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 18 reports late

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

All 22 values over a limit
Period endingOutfallParameterReportedLimitOver by
March 2026TX1Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum32 %≥ 80 %60%
March 2026TX1Whole Effluent Toxicity [WET] - C. dubia, monthly average minimum63 %≥ 80 %21%
March 2026TX1Whole Effluent Toxicity [WET] - C. dubia, monthly average minimum63 %≥ 80 %21%
June 2026001Nitrogen, ammonia total [as N], daily average115.96 lb/d≤ 30 lb/d287%
June 2026001Nitrogen, ammonia total [as N], daily average9.98 mg/L≤ 2 mg/L399%
June 2026001Nitrogen, ammonia total [as N], daily maximum23 mg/L≤ 10 mg/L130%
July 2026001BOD, carbonaceous [5 day, 20 C], daily average12.26 mg/L≤ 7 mg/L75%
July 2026001BOD, carbonaceous [5 day, 20 C], daily average129.3 lb/d≤ 105 lb/d23%
July 2026001BOD, carbonaceous [5 day, 20 C], daily maximum48 mg/L≤ 22 mg/L118%
July 2026001Nitrogen, ammonia total [as N], daily average16.52 mg/L≤ 2 mg/L726%
July 2026001Nitrogen, ammonia total [as N], daily average165.62 lb/d≤ 30 lb/d452%
July 2026001Nitrogen, ammonia total [as N], daily maximum35 mg/L≤ 10 mg/L250%
July 2026001Solids, total suspended, daily average243.59 lb/d≤ 225 lb/d8%
July 2026001Solids, total suspended, daily average25.66 mg/L≤ 15 mg/L71%
July 2026001Solids, total suspended, daily maximum72 mg/L≤ 40 mg/L80%
August 2026001Nitrogen, ammonia total [as N], daily average22.71 mg/L≤ 2 mg/L1036%
August 2026001Nitrogen, ammonia total [as N], daily average236.68 lb/d≤ 30 lb/d689%
August 2026001Nitrogen, ammonia total [as N], daily maximum37.4 mg/L≤ 10 mg/L274%
September 2026001BOD, carbonaceous [5 day, 20 C], daily average7.3 mg/L≤ 7 mg/L4%
September 2026001Nitrogen, ammonia total [as N], daily average48.69 lb/d≤ 30 lb/d62%
September 2026001Nitrogen, ammonia total [as N], daily average5.78 mg/L≤ 2 mg/L189%
September 2026001Nitrogen, ammonia total [as N], daily maximum25 mg/L≤ 10 mg/L150%

Limits in force (60)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimum≥ 4 mg/Lall year001
pHminimum≥ 6 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≤ 225 lb/dall year001
Nitrogen, ammonia total [as N]daily average≤ 2 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/Lall year001
Nitrogen, ammonia total [as N]daily average≤ 30 lb/dall year001
Nitrogen, nitrate total [as N]daily average≤ 15 mg/Lall year001
Nitrogen, nitrate total [as N]daily maximum≤ 33 mg/Lall year001
Nitrogen, nitrate total [as N]daily average≤ 225 lb/dall year001
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plant2-hour peak≤ 3750 gal/minall year001
Flow, in conduit or thru treatment plantannual average≤ 1.8 MGDall year001
Chlorine, total residualinstantaneous maximum< .1 mg/Lall year001
Chlorine, total residualmonthly minimum≥ 1 mg/Lall year001
E. colidaily average≤ 126 CFU/100mLall year001
E. colidaily maximum≤ 399 CFU/100mLall year001
Solids, total dissolveddaily averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Solids, total dissolveddaily averagereport only (lb/d)all year001
BOD, carbonaceous [5 day, 20 C]daily average≤ 7 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 22 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily average≤ 105 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
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 80 %all yearTX1
Whole Effluent Toxicity [WET] - C. dubiamonthly average minimum≥ 80 %all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (%)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas7-day minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelasmonthly average minimumreport only (pass=0;fail=1)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (%)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelasmonthly average minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelasmonthly 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 D. Pulexsingle samplereport only (pass=0;fail=1)all yearTXA
LC50 Pass/Fail Static 24Hr Acute Pimephales promelassingle 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/TX0074233 · MCP: https://passage-data.com/mcp