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Environmental Rules in Travis County, TX (2026)

7 county-level rules, plus city-specific rules for 2 cities in Travis County, Texas.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Travis County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Stormwater Management

Travis County bans illicit discharges into its municipal storm sewer system and open waterways countywide, requiring best management practices from industrial and construction sites and giving inspectors right-of-entry to check compliance. Violators face civil penalties up to $1,000 per day plus injunctions and cleanup costs.

Travis County Stormwater Discharge Rules

Significant Restrictions

Travis County Code Sec. 304.003, 304.010

No person may discharge or cause to be discharged into a municipal separate storm sewer or into a water in the State any pollutant that causes or contributes to a violation of applicable water quality standards, other than storm water authorized by permit or similar authorization issued by the TCEQ. The commencement, conduct or continuance of any illicit discharge is prohibited except as descri...

Erosion Control

Grading permits are required under Travis County Code Chapter 82 for any disturbance over 1 acre, cuts/fills over 4 feet, or any work in the Edwards Aquifer recharge or contributing zones. Drainage designs must match pre-development peak flows for 2, 10, 25, and 100-year storms using Atlas 14 rainfall data. Downstream drainage easements required for concentrated flow.

Environmental: Grading Drainage

Some Restrictions

Tex. Local Gov. Code Sec. 232.0021 (Plat Application Fee - Street and Drainage Improvements)

Sec. 232.0021. PLAT APPLICATION FEE. (a) The commissioners court may impose an application fee to cover the cost of the county's review of a subdivision plat and inspection of street, road, and drainage improvements described by the plat.(b) The fee may vary based on the number of proposed lots in the subdivision, the acreage described by the plat, the type or extent of proposed street and ...

Flood Zones

Travis County enforces floodplain development through Chapter 82 and participates in NFIP. The 2018 Llano River / Lake Travis flood raised the lake 18 feet in days and drove significant floodplain map revisions. Lake Travis and Lake Austin are managed by LCRA with flood operations out of Mansfield Dam. Development in SFHA requires a Floodplain Development Permit and finished-floor 1 foot above BFE, 2 feet in the Onion Creek basin.

Environmental: Flood Zones

Light Restrictions

FEMA Flood Map Service Center — National Flood Insurance Program (NFIP)

FEMA Flood Map Service Center: Welcome! Looking for a Flood Map? Enter an address, a place, or longitude/latitude coordinates: Looking for more than just a current flood map? Visit Search All Products to access the full range of flood risk products for your community. About Flood Map Service Center The FEMA Flood Map Service Center (MSC) is the official public source for flood hazard informatio...

Boat Dock Permits

Travis County requires County Executive approval before any access route or appurtenance to a boat dock, pier, wharf, or marina crosses the mandatory waterway setback along Lake Travis, Lake Austin, or the Colorado River below Lady Bird Lake. The setback itself runs 100 feet inland from the shoreline, or 75 feet for a detached single-family lot.

Boat Dock Access Permits in Travis County

Significant Restrictions

Travis County Code Sec. 482.941(j)(4)

The County Executive may approve necessary access and appurtenances to a boat dock, pier, wharf, or marina, along the Colorado River downstream from Lady Bird Lake and along Lake Travis and Lake Austin, except along the shoreline in the setback of a swale, creek, or river. The access and appurtenances must follow a route through the setback area and a design that minimizes short-term and long-t...

Vehicle Idling Restrictions

Heavy-duty diesel vehicles operating in Travis County are subject to the TCEQ five-minute idling rule under 30 TAC Chapter 114. Travis County signed the Memorandum of Agreement enrolling unincorporated areas in this enforceable air-quality program.

Travis County Heavy-Duty Idling Limits

Light Restrictions

Tex. Health & Safety Code Sec. 382.0191

Sec. 382.0191. IDLING OF MOTOR VEHICLE. (a) In this section, "idling" means allowing an engine to run while the motor vehicle is not engaged in forward or reverse motion. (b) The commission may not prohibit or limit the idling of any motor vehicle with a gross vehicle weight rating greater than 8,500 pounds that is equipped with a 2008 or subsequent model year heavy-duty diesel engine or liquef...

Cool Roof Requirements

Travis County has no cool-roof mandate for private properties because Texas preempts local energy code amendments on residential construction beyond the adopted 2015 IRC baseline. Voluntary high-reflectance shingles qualify for utility rebates inside Austin Energy territory.

Cool Roof Voluntary in Unincorporated Travis

Few Restrictions

Tex. Health & Safety Code Sec. 388.003 (International Energy Conservation Code Adopted)

Sec. 388.003. ADOPTION OF BUILDING ENERGY EFFICIENCY PERFORMANCE STANDARDS. (b) To achieve energy conservation in all other residential, commercial, and industrial construction, the International Energy Conservation Code as it existed on May 1, 2001, is adopted as the energy code for use in this state for all other residential, commercial, and industrial construction. The State Energy Conse...

Flood Elevation Requirements

New construction and substantial improvements in unincorporated Travis County's special flood hazard areas must sit at or above the minimum flood protection elevation: two feet of freeboard above the applicable base flood. Sec. 464.122 sets the elevation floor for residential and nonresidential structures, enforced through the county's development permit process.

Travis County Freeboard: 2 Ft Above Flood

Some Restrictions

Travis County Code Sec. 464.122

All additions to, and new construction and substantial improvement of, any residential structures within the 0.2 percent annual chance floodplain, within 100 feet of a zone A, within a zone A, and within a zone A1-30, AE, and AH shall have the lowest floor, including basement, and all utilities elevated to or above the minimum flood protection elevation. If the flood elevation of a garage attac...

Environmental Rules by City in Travis County

2 cities in Travis County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.

All Travis County ordinances

See every category we cover for Travis County: parking, noise, fences, fires, animals, pools, and more.

Travis County Ordinance Hub →