2025 Hillsborough-Polk Verification of Continued Attainment Draft Annual Report

On May 1, 2025, the department submitted the Draft annual review of emissions data and air dispersion modeling parameters for Mosaic New Wales and Mosaic Bartow, which verifies continued attainment of the 2010 one-hour SO2 National Ambient Air Quality Standard (NAAQS) for the Hillsborough-Polk maintenance area in accordance with section 175A of the CAA. This report includes:

1) The status of ongoing compliance with the SO₂ emission limits for the Mosaic New Wales and Mosaic Bartow facilities.

2) A review of annual emissions data for these facilities.

3) A review of the air dispersion modeling inputs and assumptions identified by EPA as a result of coordination with the department.

4) A certification that there are no changes in the air dispersion modeling inputs and assumptions that could result in a modeled violation.

5) All supporting documentation and data evaluated by the department to prepare its annual report.

The final annual report addresses the items listed above to demonstrate that the Hillsborough-Polk maintenance area continues to attain the 2010 SO₂ NAAQS.

For additional information, please contact Elizabeth Rogers.