Delhi Revokes GRAP Stage 1 Measures as Air Quality Improves

The Commission for Air Quality Management (CAQM) has withdrawn Stage 1 of the Graded Response Action Plan (GRAP) in Delhi and its surrounding regions, including the National Capital Region (NCR), after the Air Quality Index (AQI) improved significantly. This decision follows a consistent decline in pollution levels, bringing the AQI to the "moderate" category, recorded at 179 on Wednesday.GRAP Stage 1 is the initial level of a multi-tiered emergency response system designed to address air pollution in Delhi and NCR. Its measures are activated when the AQI ranges between 201 and 300, which falls under the “poor” category. These measures typically include the suspension of certain construction and demolition activities and restrictions on the operation of diesel generators.

The revocation of these measures comes after a comprehensive review conducted by the CAQM Sub-Committee. The committee considered the latest air quality data and forecasts from the India Meteorological Department (IMD) and the Indian Institute of Tropical Meteorology (IITM), both of which showed a consistent improvement in air quality indicators over recent days. The latest figures from the Central Pollution Control Board (CPCB) indicate that Delhi's AQI was 179, below the Stage 1 threshold.

The CAQM had invoked Stage 1 of GRAP on October 6, 2023, in anticipation of worsening air quality during the early winter season, which is typically marked by increased pollution due to lower temperatures, wind stagnation, and crop residue burning in neighboring states. However, better-than-expected meteorological conditions and favorable wind patterns contributed to a gradual reduction in pollutant concentrations.

With the withdrawal of Stage 1 measures, certain activities can resume across Delhi and NCR. These include non-essential construction and demolition operations and the use of diesel generator sets in areas not connected to the power grid. However, the CAQM has advised all agencies to continue enforcing relevant rules and ensure that pollution control norms are followed even in the absence of emergency restrictions.

The air quality management body emphasized that while GRAP measures are now relaxed, pollution levels can fluctuate due to changes in weather or regional emissions. The public is encouraged to remain aware of daily AQI updates and follow advisories as needed. Authorities have also been directed to stay alert for any deterioration in air quality, which could lead to the reactivation of GRAP stages as per the dynamic situation.

Delhi and its surrounding regions, including parts of Haryana, Uttar Pradesh, and Rajasthan, experience some of the highest pollution levels globally, particularly during the winter months. GRAP serves as a preemptive framework to limit emissions from various sources such as vehicular traffic, industrial operations, biomass burning, and construction dust. The plan is divided into four stages, with each stage corresponding to specific AQI thresholds and mandated actions.

The current improvement in air quality, while temporary, offers relief to residents and daily commuters who typically face respiratory issues and reduced visibility during the peak pollution season. It also highlights the importance of timely policy intervention, public compliance, and coordination between environmental bodies.

Conclusion
The lifting of GRAP Stage 1 measures in Delhi and the NCR reflects a positive trend in air quality, attributed to both favorable weather and effective implementation of pollution control steps. While this is a welcome development, authorities remain cautious and are prepared to reinstate GRAP stages if air quality deteriorates again. The CAQM continues to monitor the situation closely, signaling a dynamic and responsive approach to air quality management in the capital region.

Source:
Adapted from ESG Times