Air Sensor Grant Clarification and Efficiency Act of 2025

Section 1. Short title. This Act may be cited as the 'Air Sensor Grant Clarification and Efficiency Act of 2025'. Section 2. Clarification of grant use. Notwithstanding any other provision of law, amounts awarded under section 103 of the Clean Air Act (42 U.S.C. § 7403) for air pollution monitoring and control may be used by recipients to purchase, deploy, and maintain air quality sensors, including low-cost sensors, for the purpose of monitoring ambient air pollutants. The Administrator of the Environmental Protection Agency (EPA) shall issue guidance within 180 days of enactment to ensure that sensors purchased under this authority meet minimum data quality standards and that data collected is made publicly available in a machine-readable format, subject to privacy protections. Section 3. Limitations and oversight. This authority shall be exercised only for grants made after the effective date of this Act. No additional funds are authorized; grants shall be funded from existing appropriations for air quality monitoring. The EPA shall submit a report to Congress, within 90 days before the sunset date, evaluating the effectiveness of sensor deployment, data quality, and any unintended consequences. Section 4. Sunset. This Act shall sunset 5 years after the date of enactment, unless reauthorized by Congress. Section 5. Effective date. This Act shall take effect 60 days after enactment.