Delhi has brought GRAP-1 restrictions into force after its air quality reached an AQI of 233 on Wednesday morning. The reading, recorded at 9:00, falls within the 'poor' category under the Central Pollution Control Board's classification system.
The restrictions apply when the AQI remains between 201 and 300. Their measures focus on reducing emissions and controlling dust across the city.
What GRAP-1 changes in Delhi
Hotels and restaurants are not allowed to use coal under the restrictions. Diesel generators may operate only during emergencies.
Authorities will also begin regular road cleaning and water spraying to reduce dust. Construction sites will face closer monitoring, while waste management measures will be strengthened.
These steps are intended to address sources of pollution linked to fuel use, road dust, construction activity and waste handling. The supplied information does not specify how long the restrictions will remain in force.
Delhi weather and air-quality readings
Delhi recorded a minimum temperature of 18 degrees Celsius on Wednesday, described as below the seasonal average. The India Meteorological Department recorded the same minimum temperature at the city's Safdarjung weather station.
Minimum temperatures at other weather stations varied across the city. Palam recorded 17.8 degrees Celsius, which was 1.1 degrees below normal. Lodhi Road recorded 17.7 degrees Celsius, 0.7 degrees above normal.
The Ridge recorded 19.1 degrees Celsius, 0.4 degrees below normal. Ayanagar recorded 17.7 degrees Celsius, 1.1 degrees below the seasonal average.
How the AQI scale classifies pollution
The Central Pollution Control Board places AQI readings into six categories:
- Zero to 50: 'Good'
- 51 to 100: 'Satisfactory'
- 101 to 200: 'Moderate'
- 201 to 300: 'Poor'
- 301 to 400: 'Very poor'
- 401 to 500: 'Severe'
With a reading of 233, Delhi's air quality is currently within the 'poor' range. The GRAP-1 threshold and the recorded AQI therefore fall within the same classification band.
Conclusion
Delhi is operating under GRAP-1 after an AQI reading of 233 placed the city in the 'poor' category. The measures cover coal use, emergency-only diesel-generator operation, road cleaning, water spraying, construction monitoring and waste management.
Frequently Asked Questions
Q. Why were GRAP-1 restrictions introduced in Delhi?
They were introduced after Delhi's AQI reached 233, which is within the AQI range for GRAP-1 restrictions.
Q. What AQI range triggers GRAP-1 measures?
GRAP-1 measures apply when the AQI is between 201 and 300.
Q. Can hotels and restaurants use coal during GRAP-1?
No. Coal use in hotels and restaurants is stopped under the restrictions.
Q. When can diesel generators be used?
Diesel generators are permitted only during emergencies.
Q. What dust-control measures are included?
Regular road cleaning and water spraying are included, along with closer monitoring of construction sites.
