STALLION RUN WWTP, Mustang Ridge, TX: NPDES TX0139564 discharge permit, effluent exceedances, inspections, penalties

STALLION RUN WWTP, Mustang Ridge, Texas: Individual permit TX0139564, held by TRAVIS COUNTY MUNICIPAL UTILITY DISTRICT 26; Publicly owned treatment works; Administratively continued; issued December 30, 2020, term to December 30, 2025; discharges to Colorado River Above La Grange.

6 of the 9 pollutants listed for NPDES TX0139564 have no violation or effluent exceedance.

• Chlorine, total residual: 2 limits, 5 violations of any kind, 5 effluent exceedances, latest August 31, 2024, largest 90% over the limit.
• Nitrogen, ammonia total [as N]: 3 limits, 2 violations of any kind, 2 effluent exceedances, latest December 31, 2025, largest 53% over the limit.
• E. coli: 2 limits, 2 violations of any kind.
• Solids, total suspended: 3 limits.
• Phosphorus, total [as P]: 3 limits.
• BOD, carbonaceous [5 day, 20 C]: 3 limits.
• pH: 2 limits.
• Flow, in conduit or thru treatment plant: 2 limits.
• Oxygen, dissolved [DO]: 1 limit.

• August 11, 2026: State CWA Penalty AO (State), $9,000 state or local penalty.

Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 1,463 were issued before TX0139564.

Coverages issued nearest TX0139564

• 2020-12-23: WEBB COUNTY REGIONAL WWTF, Webb County: TX0118443, held by WEBB COUNTY
• 2020-12-28: NORTHSIDE WWTP, Wichita Falls: TX0084557, held by WICHITA FALLS, CITY OF
• 2020-12-29: TURKEY CREEK WWTP, Houston: TX0035017, held by HOUSTON, CITY OF
• 2020-12-29: CITY OF NATALIA WWTP, Natalia: TX0068632, held by NATALIA, CITY OF
• 2020-12-29: SAN BENITO WWTP, San Benito: TX0135470, held by SAN BENITO, CITY OF
• 2021-01-05: SOUTH LAREDO WWTP, Laredo: TX0085316, held by LAREDO, CITY OF
• 2021-01-05: CAMP MAXEY WWTP, Lamar County: TX0101214, held by TEXAS MILITARY DEPARTMENT
• 2021-01-07: TILDEN WASTEWATER TREATMENT FACILITY, Tilden: TX0132675, held by MCMULLEN COUNTY WCID 1
• 2021-01-07: VETERANS MEMORIAL HIGH SCHOOL WWTP, San Antonio: TX0134775, held by JUDSON ISD
• 2021-01-07: CITY OF STRAWN, Strawn: TX0137405, held by STRAWN, CITY OF

STALLION RUN WWTP among its neighbors

41 discharge permits are in the Maha Creek subwatershed (HUC 120903010301); TX0139564 is one. Its county: 1,099, 15 major; TX0139564 is minor permit.

Other permits in the Maha Creek subwatershed (HUC 120903010301)

• ALTERMAN CREEDMOR, Creedmoor: TXR1577UJ, minor, term to 2028-03-04
• AUSTIN METRO BUSINESS PARK, Creedmoor: TXR1515QJ, minor, term to 2028-03-04
• CLAY PARTNERS MRL WWTF, Mustang Ridge: TX0145629, minor, term to 2029-12-02
• CMWSC PHASES 2B ALEXANDER LOOP WATER LINE IMPROV, Mustang Ridge: TXR1595YY, minor, term to 2028-03-04
• COUNTY LINE SUBSTATION, Cedar Creek: TXR1523YE, minor, term to 2028-03-04
• COUNTY LINE SUBSTATION, Cedar Creek: TXR1536YB, minor, term to 2028-03-04
• CREEDMOOR 216 SUBDIVISION PHASE 1B, Creedmoor: TXR1583UG, minor, term to 2028-03-04
• CREEDMOOR BUSINESS PARK LOTS 11-15, Creedmoor: TXR1515MI, minor, term to 2028-03-04
• CREEDMORE 216, Buda: TXR1510RK, minor, term to 2028-03-04
• CREEDMORE 216, Buda: TXR1539SU, minor, term to 2028-03-04