Amendments to the Federal Clean Water Act prohibit discharge of any pollutant to navigable waters of the United States from a point source authorized by a National Pollutant Discharge Elimination System (NPDES) program permit.

December 1990 

NPDES Phase I Rules for storm water discharges adopted by the U.S. Environmental Protection Agency (EPA) for largest urbanized areas under Clean Water Act.

September 14, 1998 

EPA authorized Texas to develop and implement the alternative Texas Pollutant Discharge Elimination System (TPDES) program.

December 8, 1999 

NPDES Phase II Rules for storm water discharges adopted by EPA for small urbanized areas, which includes Travis County.


Travis County TNR Environmental Project Manager assigned full-time to perform Pre-Permit Activities and develop Storm Water Management Program (SWMP) plan for Phase II.

March 10, 2003 

Original projected Texas Commission on Environmental Quality (TCEQ) approval date of Texas TPDES Phase II Municipal Separate Storm Sewer System (MS4) General Permit TXR040000.

August 13, 2007 

Final TCEQ approval of Texas TPDES Phase II MS4 General Permit TXR040000

January 11-12, 2008 

Travis County posts Public Notice for the Travis County SWMP in the local newspaper..

February 7, 2008 

Travis County submits Notice of Intent (NOI) and SWMP to TCEQ.

May 4, 2009 

Final TCEQ approval of Travis County MS4 Permit TXR040327 and SWMP.

June 19, 2009 

Governor Perry signs SB1299 from 2009 Texas Legislature giving Travis County additional authority under Chapter 573 of the Texas Local Government Code to perform SWMP activities.

December 12, 2013

After TCEQ administratively extended the 2007 Small MS4 permit, it re-issued a new Small MS4 General Permit (TXR040000). The permit establishes a 2nd term, of five years duration. It mandates both continuing and new responsibilities for Small MS4s permittees like Travis County.

June 11, 2014

Travis County TNR submits a NOI along with a new 5-Year SWMP to TCEQ.

March 20, 2015

The TCEQ authorizes Travis County’s coverage under the 2nd term of Small MS4 permit

Authority from 2009 Texas Legislature

Emily Ackland
Environmental Quality Program Manager

Weekdays: 8:00-5:00
(512) 854-9383

Environmental Hotline
(512) 854-4400

Contact information