Relating to establishment of maximum allowable ground level concentrations of hydrogen sulfide by the Texas Commission on Environmental Quality.

HB 302 requires the Texas Commission on Environmental Quality (TCEQ) to establish legally enforceable limits for hydrogen sulfide (H₂S) in the air. It sets a 0.04 parts per million (ppm) maximum for areas used for homes, recreation, business, or shopping, and 0.06 ppm for agricultural or other non-residential areas. The TCEQ must review health studies every five years and adopt these rules by December 1, 2026. This directly affects communities near industrial sources of H₂S emissions, such as oil and gas facilities, by creating specific, measurable air quality standards.