With 6 more AQI monitoring stations, Delhi tops all cities, but experts wary, Pg4

Key Highlights:

• Delhi now has 46 CAAQMS, the highest number of air quality monitoring stations for any city in India, after inaugurating six new stations.
• The new stations are located at JNU, IGNOU, Talkatora Garden, Commonwealth Sports Complex, Delhi Cantonment, and Netaji Subhas University of Technology (West Campus).
• 30 stations are operated by the DPCC, 10 by the IMD and IITM Pune, and 6 by the CPCB.
• The Delhi government plans to install 14 more stations to ensure at least one station per 25 sq km.

Detailed Insights:

• The distribution of monitoring stations is uneven, with a concentration in central and southern Delhi, leaving peripheral areas underrepresented.
• A CSE analysis revealed that 31% of residents live within 2 km of a station, and 75% of Delhi's area is within a 5 km radius of a station.
• Outer zones with expanding populations face high exposure risks but lack adequate monitoring.
• WMO norms suggest that monitoring networks should cover dense urban centers, roadside corridors, residential pockets, industrial areas, suburban stretches, and upwind/downwind zones.
• A CAG report highlighted that some DPCC stations are near trees, high-rise buildings, and unpaved surfaces, which could lead to incorrect observations.
• The government plans to deploy 100 'Vayu Rakshaks' for pollution control enforcement and has filled 157 of 233 vacant posts in the DPCC to strengthen enforcement.

Key Concepts Involved:

• CAAQMS (Continuous Ambient Air Quality Monitoring Stations): Devices that continuously measure pollutants in the air to provide real-time data on air quality.
• DPCC (Delhi Pollution Control Committee): The agency responsible for implementing and enforcing environmental regulations and monitoring pollution levels in Delhi.
• Air Quality Index (AQI): A tool for reporting daily air quality, indicating how clean or polluted the air is, and associated health effects.