WHO-Approved Apps Show AQI of 1,000; Government Sensors Report It to be 500
WHO-approved apps record AQI levels exceeding 1,000 in NCR while government sensors cap readings at 500, prompting environmentalists to demand system revamp. CPCB's methodology uses less stringent breakpoints than WHO guidelines and 24-hour averages versus frequent reporting. This discrepancy affects policy decisions and public health responses during severe pollution episodes.