Air quality is affected by terrain and climate. When the prevailing wind is blowing in the easterly direction, since Taichung City is located on the leeward side of the Central Range, coupled with the basin terrain, pollutants tend to accumulate and do not disperse easily, causing poor air quality. For real-time information on air quality, please visit EPB’s Taichung Air Quality Monitoring Web in order to take necessary precautions.