Ground surface ozone (O₃) is an emerging concern in China due to its complex formation process. In August 2020, field measurements of O₃, NO_x, and volatile organic compounds (VOCs) were carried out in Hefei’s western suburbs. The pollution features of VOCs and O₃ formation were thoroughly analyzed. The total VOC concentration was 42.26 ppb, with the dominant contributor being oxygenated VOCs (OVOCs). Seven emission sources were recognized using the positive matrix factorization (PMF) model, including aged air masses, combustion sources, fuel evaporation, industrial emissions, vehicular emission, solvent utilization, and biogenic emission. Ozone generation mainly occurred under an NO_x-limited regime based on the zero-dimensional box model analysis. According to the scenario analysis, the 13% cut in O₃ might be achieved by the 10% and 30% reduction in NO_x and VOCs, respectively. The O₃ budget analysis demonstrates its high ozone production rate during the pollution period. The influence of regional transport cannot be ignored for high O₃ pollution. This paper provides scientific evidence for O₃ production and the strategies of reducing O₃ by controlling its precursors.