The air quality around a nine-day pilgrimage to a coastal town in central Taiwan was monitored throughout the whole event for the first time to gain a better understanding of how local air quality is affected by the activity. The air quality readings showed that fine particulate matter (PM2.5) levels were highest when the pilgrimage palanquin of the entered local temples (4,188 μg/m3) compared to the highest reading of 1,550 μg/m3 around the palanquin while it was on roads. The monitoring results are published online for public perusal. The two main tools employed by the EPA to monitor air quality during the pilgrimage were an E-motor vehicle and hand-held PM2.5 micro-sensors. The hand-held sensors were carried by EPA staff following pilgrims to obtain real-time PM2.5 values. The E-motor, by contrast, was parked beside temples visited by pilgrims to monitor changes in air quality as the palanquin passed by. The highest reading taken by the E-motor was 4,188 μg/m3; the three highest readings taken by the hand-held PM2.5 micro-sensors were 1,550 μg/m3 and 1,476 μg/m3 in Changhua City and 1,494 μg/m3 in Siluo Township. The cause of the high air pollution in all cases was people setting off firecrackers and fireworks to celebrate the arrival of the palanquin. The readings taken by the EPA personnel with the hand-held devices indicated that PM2.5 concentrations within 5 m of places where firecrackers and fireworks were set off always exceeded 1,000 μg/m3. PM2.5 levels within 10 m of the palanquin and the pilgrims immediately behind it were still several hundred μg/m3, or even higher if the devices were in a downwind position, due to the concentration of firecracker smoke. However, the high PM2.5 concentrations were momentary and quickly fell once the smoke dispersed. During the nine days of the pilgrimage the EPA was publishing real-time monitoring data on its dedicated webpage (http://ienv.epa.gov.tw/IoT). The EPA has also made available all raw data gathered at the event for public perusal and downloading on its Environmental Resource Open Data Platform. In the future, the EPA will provide the relevant monitoring data to all temples and temple event organizers. The EPA also urges temples and temple event organizers to find ways to protect the environment while still achieving the event’s aims. The EPA suggests reducing the use of traditional firecrackers (or using eco-friendly firecrackers) and collecting and burning the joss paper offerings together to reduce emissions of air pollutants and reduce noise pollution.