CPCB explains why official AQI tops out at 500 while private apps show higher readings
The Central Pollution Control Board has clarified why its official Air Quality Index is capped at 500, even as some private air-quality apps display higher figures. The agency's explanation centers on the scale's design, which sets 500 as the upper limit of the national index. Differences in measurement methods and reporting scales used by private platforms also contribute to the gap in readings. The clarification addresses public confusion over conflicting air quality numbers from different sources.
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