San Antonio, TX Environmental Rules: Vehicle Idling Restrictions (2026)
Key Facts
- State rule
- 30 TAC 114.512
- Idle limit
- 5 consecutive minutes
- Vehicle threshold
- Over 14,000 lbs GVWR
- Temperature window
- 40 to 90 degrees
- Enforcement
- TCEQ, SAPD, Sheriff
Summary
Bexar County opted into TCEQ Rule 30 TAC 114.512, prohibiting commercial vehicles over 14,000 pounds GVWR from idling more than five consecutive minutes when temperatures fall between 40 and 90 degrees, with several work-related exemptions.
(a) Before work is begun on the construction of a new facility or a modification of an existing facility that may emit air contaminants, the person planning the construction or modification must obtain a permit or permit amendment from the commission.(b) The commission shall grant within a reasonable time a permit or permit amendment to construct or modify a facility if, from the information available to the commission, including information presented at any hearing held under Section 382.056(k), the commission finds:(1) the proposed facility for which a permit, permit amendment, or a special permit is sought will use at least the best available control technology, considering the technical
Full Breakdown
San Antonio sits within a TCEQ-approved Locally Enforced Motor Vehicle Idling Limitations area covering Bexar County. Heavy commercial vehicles exceeding 14,000 pounds gross vehicle weight rating cannot idle longer than five consecutive minutes between 40 and 90 degrees Fahrenheit. Exemptions cover safety inspections, mechanical work, traffic delays, sleeper-berth temperature control between October and April, power take-off, and emergency response. The City of San Antonio Office of Sustainability coordinates with TCEQ field officers and SAPD on enforcement. Personal passenger vehicles are not regulated. The rule supports federal ozone attainment for the San Antonio New Braunfels metro and reduces diesel exposure near schools and freight corridors.
Violations & Fines
First-offense fines reach up to 500 dollars under Texas Health and Safety Code Section 382.0518, with repeat violations climbing higher. Fleet operators may face TCEQ enforcement orders and corrective action plans for company-wide noncompliance.
Frequently Asked Questions
Does the rule apply to my pickup truck?
Can a truck idle for sleeper cab heat?
Sources & Official References
Other rules in San Antonio
Texas rules heatmap·Compare San Antonio to another location·View the Texas environmental rules overview
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Vehicle Idling Restrictions in Nearby Cities
How other cities in Bexar County handle vehicle idling restrictions.