Abstract
Ground-level ozone is a secondary pollutant and is attributable to respiratory diseases and mortality. For this reason, the World Health Organization (WHO) implemented a new long-term (peak season) limit value for ozone. The previous studies related to ozone in Türkiye were spatially limited to certain locations. In this study, annual mean and peak season ozone concentrations, and limit exceedances were investigated for Türkiye for the year 2021. Moreover, ozone peak seasons were determined for the first time for 126 air quality monitoring stations. The annual mean ozone concentration was determined as 44.3 ± 19.3 µg/m3 whereas the peak season average ozone level was 68.4 ± 27.2 µg/m3. April-September period was the most frequently observed ozone peak season. Among all stations, Erzurum Palandöken was by far the most polluted station in terms of annual mean and limit exceedances of ozone. Ankara Siteler stations have the highest rank in peak season mean. 87 and 83 stations exceeded the short-term and long-term recommendations of WHO, respectively. Four hotspot regions were revealed in terms of peak season exceedance: Adana and surrounding provinces, the surroundings of Burdur and Isparta provinces, and the northeastern and northwestern parts of Türkiye. To protect public health, WHO recommendations for 8-h and peak season limits should be immediately implemented in Turkish regulations.
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Data availability
Ozone measurements were downloaded from the Turkish Air Quality Monitoring Network website (https://www.havaizleme.gov.tr/). The datasets generated during the current study are available from the corresponding author upon reasonable request.
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Özgür Zeydan: conceptualization, methodology, data analysis, visualization, writing, review, and editing. Uğur Ülker: data acquisition, data analysis, review, and editing.
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Zeydan, Ö., Ülker, U. Assessment of ground-level ozone pollution in Türkiye according to new WHO limits. Environ Monit Assess 196, 549 (2024). https://doi.org/10.1007/s10661-024-12718-8
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DOI: https://doi.org/10.1007/s10661-024-12718-8