All measurements are primarily based on hourly readings: For instance, an AQI reported at 8AM implies that the measurement was carried out from 7AM to 8AM.
ການວັດແທກທັງຫມົດແມ່ນອີງໃສ່ການອ່ານຊົ່ວໂມງ: ຕົວຢ່າງ, AQI ລາຍງານຢູ່ 8AM ຫມາຍຄວາມວ່າການວັດແທກໄດ້ເຮັດຈາກ 7am ຫາ 8am.