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San Antonio, City Public Service of

Electric Services, major discharger, San Antonio, Texas. NPDES permit TX0063690, in force until Jan 9, 2031. Last 12 months: no values over a limit, 24 required values missing, 1 of 147 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form A monthly (15 values), outfall 101 form A monthly (6 values), outfall 201 form A monthly (8 values), outfall 401 form A monthly (8 values), outfall 801 form A monthly (8 values), outfall 001 form S twice a year, and 19 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 305 reports late

Limits in force (167)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily averagereport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 10 SUall year001
Chloride [as Cl]daily maximumreport only (mg/L)all year001
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year001
Flow, in conduit or thru treatment plantdaily average≤ 1320 MGDall year001
Flow, in conduit or thru treatment plantdaily maximum≤ 1340 MGDall year001
Chlorine, total residualdaily maximum≤ .2 mg/Lall year001
Chlorine, total residualdaily maximum≤ 1469 lb/dall year001
Chlorine, total residualdaily maximum≤ .1 mg/Lall year001
Chlorine, free availabledaily average≤ .2 mg/Lall year001
Chlorine, free availabledaily maximum≤ .5 mg/Lall year001
Chlorine, free availabledaily average≤ 184 lb/dall year001
Chlorine, free availabledaily maximum≤ 459 lb/dall year001
Chlorine, free availabledaily average≤ .2 mg/Lall year001
Chlorine, free availabledaily maximum≤ .25 mg/Lall year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year003
pHminimum≥ 6 SUall year003
pHmaximum≤ 9 SUall year003
Oil & Greasedaily maximum≤ 15 mg/Lall year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year006
pHminimum≥ 6 SUall year006
pHmaximum≤ 9 SUall year006
Oil & Greasedaily maximum≤ 15 mg/Lall year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year007
pHminimum≥ 6 SUall year007
pHmaximum≤ 9 SUall year007
Oil & Greasedaily maximum≤ 15 mg/Lall year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year008
pHminimum≥ 6 SUall year008
pHmaximum≤ 9 SUall year008
Oil & Greasedaily maximum≤ 15 mg/Lall year008
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year008
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year009
pHminimum≥ 6 SUall year009
pHmaximum≤ 9 SUall year009
Oil & Greasedaily maximum≤ 15 mg/Lall year009
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year009
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year010
pHminimum≥ 6 SUall year010
pHmaximum≤ 9 SUall year010
Oil & Greasedaily maximum≤ 15 mg/Lall year010
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year010
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year011
pHminimum≥ 6 SUall year011
pHmaximum≤ 9 SUall year011
Oil & Greasedaily maximum≤ 15 mg/Lall year011
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year011
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year013
pHminimum≥ 6 SUall year013
pHmaximum≤ 9 SUall year013
Oil & Greasedaily maximum≤ 15 mg/Lall year013
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year013
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year015
pHminimum≥ 6 SUall year015
pHmaximum≤ 9 SUall year015
Oil & Greasedaily maximum≤ 15 mg/Lall year015
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year015
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year016
pHminimum≥ 6 SUall year016
pHmaximum≤ 9 SUall year016
Oil & Greasedaily maximum≤ 15 mg/Lall year016
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year016
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year017
pHminimum≥ 6 SUall year017
pHmaximum≤ 9 SUall year017
Oil & Greasedaily maximum≤ 15 mg/Lall year017
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year017
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year018
pHminimum≥ 6 SUall year018
pHmaximum≤ 9 SUall year018
Oil & Greasedaily maximum≤ 15 mg/Lall year018
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year018
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year019
pHminimum≥ 6 SUall year019
pHmaximum≤ 9 SUall year019
Oil & Greasedaily maximum≤ 15 mg/Lall year019
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year019
Solids, total suspendeddaily average≤ 30 mg/Lall year101
Solids, total suspendeddaily maximum≤ 100 mg/Lall year101
Oil & Greasedaily average≤ 15 mg/Lall year101
Oil & Greasedaily maximum≤ 20 mg/Lall year101
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
pHminimum≥ 6 SUall year201
pHmaximum≤ 10 SUall year201
Solids, total suspendeddaily average≤ 30 mg/Lall year201
Solids, total suspendeddaily maximum≤ 100 mg/Lall year201
Oil & Greasedaily average≤ 15 mg/Lall year201
Oil & Greasedaily maximum≤ 20 mg/Lall year201
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year201
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year201
pHminimum≥ 6 SUall year401
pHmaximum≤ 10 SUall year401
Solids, total suspendeddaily average≤ 30 mg/Lall year401
Solids, total suspendeddaily maximum≤ 100 mg/Lall year401
Oil & Greasedaily average≤ 15 mg/Lall year401
Oil & Greasedaily maximum≤ 20 mg/Lall year401
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year401
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year401
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year501
pHminimum≥ 6 SUall year501
pHmaximum≤ 9 SUall year501
Oil & Greasedaily maximum≤ 15 mg/Lall year501
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year501
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year601
pHminimum≥ 6 SUall year601
pHmaximum≤ 9 SUall year601
Oil & Greasedaily maximum≤ 15 mg/Lall year601
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year601
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year701
pHminimum≥ 6 SUall year701
pHmaximum≤ 10 SUall year701
Solids, total suspendeddaily maximumreport only (mg/L)all year701
Oil & Greasedaily maximum≤ 15 mg/Lall year701
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year701
pHminimum≥ 6 SUall year801
pHmaximum≤ 10 SUall year801
Solids, total suspendeddaily average≤ 30 mg/Lall year801
Solids, total suspendeddaily maximum≤ 100 mg/Lall year801
Oil & Greasedaily average≤ 15 mg/Lall year801
Oil & Greasedaily maximum≤ 20 mg/Lall year801
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year801
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year801
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year901
pHminimum≥ 6 SUall year901
pHmaximum≤ 10 SUall year901
Solids, total suspendeddaily maximumreport only (mg/L)all year901
Oil & Greasedaily maximum≤ 20 mg/Lall year901
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year901
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 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.

Same industry: the 87 Electric Services permits in Texas.

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