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Midland, City of

Sewerage Systems, major discharger, Midland, Texas. NPDES permit TX0138517, in force until May 29, 2031. Last 12 months: over a limit 2 times (last July 2026), 6 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 002 form A monthly (18 values), outfall TX2 form Q quarterly, outfall TXB form S twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 13 of 18 reports late

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

Period endingParameterReportedLimitOver by
May 2026E. coli, daily maximum1732.9 CFU/100mL≤ 399 CFU/100mL334%
July 2026E. coli, daily maximum> 2419.6 CFU/100mL≤ 399 CFU/100mL—

Limits in force (32)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimum≥ 4 mg/Lall year002
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendeddaily average≤ 15 mg/Lall year002
Solids, total suspendeddaily maximum≤ 40 mg/Lall year002
Solids, total suspendeddaily average≤ 1877 lb/dall year002
Nitrogen, ammonia total [as N]daily average≤ 3 mg/Lall year002
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/Lall year002
Nitrogen, ammonia total [as N]daily average≤ 375 lb/dall year002
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Flow, in conduit or thru treatment plant2-hour peak≤ 30556 gal/minall year002
Flow, in conduit or thru treatment plantannual average≤ 15 MGDall year002
E. colidaily average≤ 126 CFU/100mLall year002
E. colidaily maximum≤ 399 CFU/100mLall year002
BOD, carbonaceous [5 day, 20 C]daily average≤ 10 mg/Lall year002
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 25 mg/Lall year002
BOD, carbonaceous [5 day, 20 C]daily average≤ 1251 lb/dall year002
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48-hour minimumreport only (pass=0;fail=1)all yearTX2
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexmonthly average minimumreport only (pass=0;fail=1)all yearTX2
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (pass=0;fail=1)all yearTX2
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasmonthly average minimumreport only (pass=0;fail=1)all yearTX2
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48-hour minimumreport only (%)all yearTX2
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexmonthly average minimumreport only (%)all yearTX2
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48-hour minimumreport only (%)all yearTX2
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasmonthly average minimumreport only (%)all yearTX2
LOAEC Lethal Static Renewal 48HR Acute Daphnia pulex48-hour minimumreport only (%)all yearTX2
LOAEC Lethal Static Renewal 48HR Acute Daphnia pulexmonthly average minimumreport only (%)all yearTX2
LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (%)all yearTX2
LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelasmonthly average minimumreport only (%)all yearTX2
LC50 Pass/Fail Static 24Hr Acute D. Pulexsingle samplereport only (pass=0;fail=1)all yearTXB
LC50 Pass/Fail Static 24Hr Acute Pimephales promelassingle samplereport only (pass=0;fail=1)all yearTXB

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/TX0138517 · MCP: https://passage-data.com/mcp