The numerical value of PM 2.5 is updated every hour (every 10 minutes at each time).
When the particulate matter (PM 2.5) exceeds the national standard value of 35 μg / m 3, the value is displayed in red.
If you have a weak throat or bronchus, if you feel uncomfortable in the eyes etc., Please use it as a guide for health care, such as going out, acting out at the judgment of yourself etc. At your own discretion.
Reference: Fukuoka city open data
http://www.open-governmentdata.org/