Include “2025 CSAPR Assurance Provisions” in the email subject line and include your name, title, affiliation, address, phone number, and email address in the body of the email. The U.S. Environmental Protection Agency (EPA) is providing notice of the availability of data on the administration of the assurance provisions of the Cross-State Air Pollution Rule (CSAPR) trading program for the 2025 control period. Virginia units participating in the CSAPR NO X Ozone Season Group 2E Trading Program during the 2025 control period reported total nitrogen oxides (NO X ) emissions that exceeded the State's assurance level under the program. The EPA will consider timely objections to the data and calculations before making final determinations of the additional allowances that owners and operators of certain Virginia units must surrender. The spreadsheet also provides 2025 control period calculations showing the total reported NO X emissions from all such units in Virginia and the amounts by which those total reported NO X emissions exceeded the State's assurance level under the program.