Relating to the consideration of the cumulative effects of air contaminant emissions in the emissions permitting process.

SB 273 requires the Texas Commission on Environmental Quality to consider the cumulative health and property impacts of air emissions from a facility *and* other facilities within three miles when reviewing new permits or renewing existing permits after September 1, 2025. This directly affects businesses seeking emissions permits for industrial facilities in Texas, particularly those located near other polluting sites. The key provision mandates that permit decisions must evaluate how emissions from multiple nearby sources collectively affect public health and property, rather than assessing each facility in isolation. The law applies only to permit applications filed on or after the effective date, not to existing permits.