<p class="bodytext">The air quality improved further to reach "moderate" levels at Noida, Greater Noida, Ghaziabad and Faridabad, while it stayed in the "poor" category in Gurgaon on Tuesday, according to a government agency.</p>.<p class="bodytext">According to the Central Pollution Control Board's (CPCB) Sameer mobile application, the average 24-hour air quality index (AQI) was 166 in Ghaziabad, 172 in Faridabad, 178 in Noida, 186 in Greater Noida and 204 in Gurgaon at 4 pm.</p>.<p class="bodytext">An AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe".</p>.<p class="bodytext">On Monday, the average AQI was 186 in Faridabad, 207 in Ghaziabad, 226 in Greater Noida, 243 in Noida and 246 in Gurgaon, showing a drastic improvement over the previous day due to a spell of rain in the National Capital Region (NCR).</p>.<p class="bodytext">On Sunday, the average AQI was 448 in Ghaziabad, 441 in Noida, 417 in Greater Noida, 425 in Gurgaon and 414 in Faridabad.</p>.<p class="bodytext">According to the CPCB, an AQI in the "poor" category may cause breathing discomfort to most people on a prolonged exposure, while a "moderate" AQI may cause such discomfort to people with asthma, lung and heart diseases.</p>.<p class="bodytext">The AQI for each city is based on the average value of all air quality-monitoring stations there. Noida, Faridabad and Ghaziabad have four such stations each, while Gurgaon has three and Greater Noida two, according to the app. </p>
<p class="bodytext">The air quality improved further to reach "moderate" levels at Noida, Greater Noida, Ghaziabad and Faridabad, while it stayed in the "poor" category in Gurgaon on Tuesday, according to a government agency.</p>.<p class="bodytext">According to the Central Pollution Control Board's (CPCB) Sameer mobile application, the average 24-hour air quality index (AQI) was 166 in Ghaziabad, 172 in Faridabad, 178 in Noida, 186 in Greater Noida and 204 in Gurgaon at 4 pm.</p>.<p class="bodytext">An AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe".</p>.<p class="bodytext">On Monday, the average AQI was 186 in Faridabad, 207 in Ghaziabad, 226 in Greater Noida, 243 in Noida and 246 in Gurgaon, showing a drastic improvement over the previous day due to a spell of rain in the National Capital Region (NCR).</p>.<p class="bodytext">On Sunday, the average AQI was 448 in Ghaziabad, 441 in Noida, 417 in Greater Noida, 425 in Gurgaon and 414 in Faridabad.</p>.<p class="bodytext">According to the CPCB, an AQI in the "poor" category may cause breathing discomfort to most people on a prolonged exposure, while a "moderate" AQI may cause such discomfort to people with asthma, lung and heart diseases.</p>.<p class="bodytext">The AQI for each city is based on the average value of all air quality-monitoring stations there. Noida, Faridabad and Ghaziabad have four such stations each, while Gurgaon has three and Greater Noida two, according to the app. </p>