Clean Water Act discharge permit · NPDES TXS000401

CITY OF AUSTIN MS4, Austin, TX: NPDES TXS000401 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
28Pollutants under a numeric limit
1Pollutants with an effluent exceedance
1Inspections on file
0Formal enforcement actions

CITY OF AUSTIN MS4, held by AUSTIN, CITY OF, holds NPDES permit TXS000401, which discharges to Various Ditches And Tributaries, La. EPA’s file records it issued July 20, 2011 and expiring July 20, 2016.

CITY OF AUSTIN MS4, Austin, Texas: Individual permit TXS000401, held by AUSTIN, CITY OF; Large municipal storm sewer systems; Administratively continued (past its expiration date and still in force until reissued); issued July 20, 2011, term to July 20, 2016; discharges to VARIOUS DITCHES AND TRIBUTARIES, LA.

pH: 8 limits, 176 violations of any kind, 2 effluent exceedances, latest March 31, 2001.
Hardness, total [as CaCO3]: 4 limits, 128 violations of any kind, 0 effluent exceedances.
Temperature, water deg. centigrade: 4 limits, 121 violations of any kind, 0 effluent exceedances.
Phosphorus, dissolved: 4 limits, 113 violations of any kind, 0 effluent exceedances.
Solids, total suspended: 4 limits, 110 violations of any kind, 0 effluent exceedances.
Nitrogen, total [as N]: 4 limits, 110 violations of any kind, 0 effluent exceedances.
Nitrogen, Kjeldahl, total [as N]: 4 limits, 110 violations of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 4 limits, 110 violations of any kind, 0 effluent exceedances.
Sulfate, total [as SO4]: 4 limits, 110 violations of any kind, 0 effluent exceedances.
Lead, total [as Pb]: 4 limits, 110 violations of any kind, 0 effluent exceedances.
Zinc, total [as Zn]: 4 limits, 110 violations of any kind, 0 effluent exceedances.
Solids, total dissolved: 4 limits, 110 violations of any kind, 0 effluent exceedances.
BOD, 5-day, 20 deg. C: 4 limits, 109 violations of any kind, 0 effluent exceedances.
Oxygen demand, chem. [high level] [COD]: 4 limits, 108 violations of any kind, 0 effluent exceedances.
Nitrite + Nitrate total [as N]: 4 limits, 108 violations of any kind, 0 effluent exceedances.
Chloride [as Cl]: 4 limits, 108 violations of any kind, 0 effluent exceedances.
Copper, total [as Cu]: 4 limits, 108 violations of any kind, 0 effluent exceedances.
Oil & Grease: 4 limits, 100 violations of any kind, 0 effluent exceedances.
Cadmium, total [as Cd]: 4 limits, 100 violations of any kind, 0 effluent exceedances.
Silver, total [as Ag]: 4 limits, 100 violations of any kind, 0 effluent exceedances.
E. coli: 4 limits, 71 violations of any kind, 0 effluent exceedances.
Atrazine: 4 limits, 70 violations of any kind, 0 effluent exceedances.
Chlordane [tech mix. and metabolites]: 2 limits, 56 violations of any kind, 0 effluent exceedances.
Polychlorinated biphenyls [PCBs]: 2 limits, 56 violations of any kind, 0 effluent exceedances.
Enterococci: 4 limits, 52 violations of any kind, 0 effluent exceedances.
Enterococci: group D, MF trans, M-E, EIA: 0 limits, 40 violations of any kind, 0 effluent exceedances.
DDD in whole water sample: 2 limits, 36 violations of any kind, 0 effluent exceedances.
DDE: 2 limits, 36 violations of any kind, 0 effluent exceedances.
DDT: 2 limits, 36 violations of any kind, 0 effluent exceedances.
Coliform, fecal general: 0 limits, 36 violations of any kind, 0 effluent exceedances.
4,4'-DDT: 0 limits, 20 violations of any kind, 0 effluent exceedances.
4,4'-DDD: 0 limits, 20 violations of any kind, 0 effluent exceedances.
4,4'-DDE: 0 limits, 20 violations of any kind, 0 effluent exceedances.
Diazinon: 0 limits, 18 violations of any kind, 0 effluent exceedances.
Streptococci, fecal general: 0 limits, 18 violations of any kind, 0 effluent exceedances.

July 17, 2026: Focused (S).

Texas holds 21 Large municipal storm sewer systems coverages of this permit type in EPA’s file; 8 were issued before TXS000401. AUSTIN, CITY OF holds 14 permits in Texas.

Other permits held by AUSTIN, CITY OF

WALNUT CREEK WWTP, Austin: TX0046981, issued January 13, 2015
DECKER CREEK POWER PLANT, Austin: TX0058441, issued December 6, 2019
THOROUGHBRED FARMS WWTP, Austin: TX0067466, issued September 10, 2019
SOUTH AUSTIN REGIONAL WWTP, Del Valle: TX0071889, issued December 19, 2019
DESSAU WWTF, Austin: TX0097870, issued May 21, 2015
HARRIS BRANCH WWTP, Austin: TX0101532, issued April 22, 2010
GARFIELD WWTP, Austin: TX0117200, issued February 28, 2006
SANDHILL ENERGY CENTER, Del Valle: TX0124362, issued December 4, 2019
WILD HORSE RANCH WWTP, Manor: TX0124800, issued June 15, 2015
NACOGDOCHES GENERATING FACILITY, Cushing: TX0124842, issued September 23, 2021

Coverages issued nearest TXS000401

August 11, 2008: CORPUS CHRISTI, CITY OF, Corpus Christi, TXS000601
March 13, 2009: PORT OF HOUSTON AUTH MS4, Houston, TXS001202, held by PORT OF HOUSTON AUTHORITY
April 11, 2011: CITY OF SAN ANTONIO MS4, San Antonio, TXS001901, held by SAN ANTONIO, CITY OF
June 17, 2011: CITY OF GARLAND MS4, Collin County, TXS001001, held by GARLAND, CITY OF
July 7, 2011: UNIVERSITY OF TEXAS AT AUSTIN MS4, Austin, TXS000403, held by UNIVERSITY OF TEXAS AT AUSTIN
July 29, 2011: CITY OF FORT WORTH MS4, Denton County, TXS000901, held by FORT WORTH, CITY OF & TARRANT
August 15, 2011: CITY OF ABILENE MS4, Abilene, TXS000101, held by ABILENE, CITY OF
September 13, 2011: CITY OF EL PASO MS4, El Paso, TXS000801, held by EL PASO, CITY OF
October 6, 2011: CITY OF DALLAS MS4, Dallas, TXS000701, held by DALLAS, CITY OF
November 2, 2011: BEAUMONT MS4, Beaumont, TXS000501, held by BEAUMONT, CITY OF

CITY OF AUSTIN MS4 among its neighbors

EPA’s permit file holds 117 discharge permits in the Town Lake-Colorado River subwatershed (HUC 120902050306), TXS000401 among them. Its county holds 1,099, 15 of them major permits; TXS000401 is a major permit.

Other permits in the Town Lake-Colorado River subwatershed (HUC 120902050306)

2323 SOUTH LAMAR MIXED USE, Austin: TXR1519MD, minor permit, discharging to WEST BOULDIN CREEK, permit term to March 4, 2028
2915 E CESAR CHAVEZ STREET, Austin: TXR1524VJ, minor permit, discharging to COLORADO RIVER BELOW LADY BIRD LAKE, permit term to March 4, 2028
AISD - LEE ELEMENTARY SCHOOL CLASSROOM BUILDING, Austin: TXR15167X, minor permit, discharging to WALLER CREEK, permit term to March 4, 2023
AISD - MCCALLUM HIGH SCHOOL, Austin: TXR1588UZ, minor permit, discharging to COLORADO RIVER, permit term to March 4, 2028
AISD ALLISON ELEMENTARY, Austin: TXR1568RV, minor permit, discharging to COLORADO RIVER, permit term to March 4, 2028
AISD TRAVIS ECHS, Austin: TXR1585SW, minor permit, discharging to HARPERS BRANCH, permit term to March 4, 2028
AMERICAN RED CROSS, Austin: TXR1544XC, minor permit, discharging to TANNEHILL BRANCH CREEK, permit term to March 4, 2028
AMLI MUELLER V, Austin: TXR1582PK, minor permit, discharging to BOGGY CREEK, permit term to March 4, 2028
ANDERSON HIGH SCHOOL, Austin: TXR1501XI, minor permit, discharging to COLORADO, permit term to March 4, 2028
APAC AUSTIN HOT MIX PLANT, Austin: TXR05FF43, minor permit, permit term to August 13, 2026

Identity

Facility as filed	CITY OF AUSTIN MS4
Permittee as filed	AUSTIN, CITY OF
NPDES ID	TXS000401
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Not a publicly owned treatment works
Program	Large municipal storm sewer systems
Issued	July 20, 2011
Expiration date	July 20, 2016
Address	Austin, TX 78767
Receiving water	VARIOUS DITCHES AND TRIBUTARIES, LA
Subwatershed	Town Lake-Colorado River (HUC 120902050306)

Effluent limits and exceedances

35Pollutants on file
28Under a numeric limit
35With a violation of any kind
1With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance
pH	8	176	2	March 31, 2001
Hardness, total [as CaCO3]	4	128	0
Temperature, water deg. centigrade	4	121	0
Phosphorus, dissolved	4	113	0
Solids, total suspended	4	110	0
Nitrogen, total [as N]	4	110	0
Nitrogen, Kjeldahl, total [as N]	4	110	0
Phosphorus, total [as P]	4	110	0
Sulfate, total [as SO4]	4	110	0
Lead, total [as Pb]	4	110	0
Zinc, total [as Zn]	4	110	0
Solids, total dissolved	4	110	0
BOD, 5-day, 20 deg. C	4	109	0
Oxygen demand, chem. [high level] [COD]	4	108	0
Nitrite + Nitrate total [as N]	4	108	0
Chloride [as Cl]	4	108	0
Copper, total [as Cu]	4	108	0
Oil & Grease	4	100	0
Cadmium, total [as Cd]	4	100	0
Silver, total [as Ag]	4	100	0
E. coli	4	71	0
Atrazine	4	70	0
Chlordane [tech mix. and metabolites]	2	56	0
Polychlorinated biphenyls [PCBs]	2	56	0
Enterococci	4	52	0
Enterococci: group D, MF trans, M-E, EIA	0	40	0
DDD in whole water sample	2	36	0
DDE	2	36	0
DDT	2	36	0
Coliform, fecal general	0	36	0
4,4'-DDT	0	20	0
4,4'-DDD	0	20	0
4,4'-DDE	0	20	0
Diazinon	0	18	0
Streptococci, fecal general	0	18	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES TXS000401.

Inspections

Date	What EPA recorded	Agency
July 17, 2026	Focused	S

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES TXS000401.

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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers Clean Water Act discharge permit NPDES TXS000401, held by AUSTIN, CITY OF for the CITY OF AUSTIN MS4 in Austin, TX, with a status of administratively continued and a Major Discharger class. The page lists 35 pollutants on file, 28 under a numeric limit, and 1 with an effluent exceedance.