Lucknow is one of the most polluted metro-city in India with increasing vehicular density and fuel consumption in the last three decades. The study was conducted during years 2019–2021 for measurement of fine particulate matter (PM_2.5), nitrogen dioxide (NO₂), sulphur dioxide (SO₂), respirable particulate matter (PM₁₀), and noise levels at nine selected sites; 4 residential, 4 commercial, and 1 industrial, encompassing prior-to-lockdown, during-lockdown, and after-lockdown periods. Values of PM₁₀ for prior-to-lockdown, during-lockdown, and after-lockdown period ranged from 133.2 to 197.4, 77.0 to 135.0, and 91.4 to 148.0 µg/m³, respectively while values of PM_2.5 were 66.5 to 93.6, 41.9 to 67.5 and 49.5 to 98.6 µg/m³, respectively. Corresponding values of SO₂ ranged from 8.7 to 12.8, 5.5 to 7.6, and 11.4 to 17.6 µg/m³, respectively while values of NO₂ were 24.6 to 57.0, 20.5 to 32.8, and 26.1 to 43.8 µg/m³, respectively. Order of the trace metals associated with PM_2.5 is Co < Cd < As < Cr < Ni < Cu < Pb < Mn < K < Zn, Co < Cd < As < Cr < Cu < Ni < Pb < Mn < Zn < K and Cd < Co < As < Cr < Cu < Ni < Pb < Mn < K < Zn in the same periods. Statistical data evidenced that the air quality of the city witnessed drastic improvement during the COVID-19 pandemic. WHO AIRQ + was utilized to calculate attributable health risk and post-neonatal disease burden; showing 1447 ± 768 estimated number of cases attributable to ambient PM₁₀ per lakh of population. Regulatory authorities need to establish new benchmarks for the prevention and management of public health risks for urban resilience and environmental management for episodic events in the near future.

勒克瑙是印度污染最严重的大都市之一，过去三十年来车辆密度和燃料消耗不断增加。该研究于 2019 年至 2021 年期间进行，测量了九个选定地点的细颗粒物 (PM _2.5 )、二氧化氮 (NO ₂ )、二氧化硫 (SO ₂ )、可吸入颗粒物 (PM ₁₀ ) 和噪音水平；4 个住宅区、4 个商业区和 1 个工业区，涵盖封锁前、封锁期间和封锁后时期。_{封城前、封城期间、封城后PM 10}值分别为133.2～197.4、77.0～135.0、91.4～148.0 µg/m 3 ，PM 2.5^值_分别为分别为66.5至93.6、41.9至67.5和49.5至98.6μg/m ³。SO ₂的相应值分别为8.7至12.8、5.5至7.6和11.4至17.6 µg/m ³，而NO ₂的相应值分别为24.6至57.0、20.5至32.8和26.1至43.8 µg/m ³。_{与 PM 2.5}相关的微量金属的顺序Co < Cd < As < Cr < Ni < Cu < Pb < Mn < K < Zn，Co < Cd < As < Cr < Cu < Ni < Pb < Mn < Zn < K 且 Cd < Co < As < Cr < Cu同期<Ni<Pb<Mn<K<Zn。统计数据表明，新冠肺炎（COVID-19）疫情期间，我市空气质量得到显着改善。WHO AIRQ+用于计算可归因的健康风险和新生儿后疾病负担；显示每十万人口中有1447 ± 768 例由环境 PM ₁₀引起的估计病例数。监管机构需要在不久的将来建立新的基准，以预防和管理公共卫生风险，以提高城市复原力和突发事件的环境管理。