India, Jan. 21 -- Dust from uncovered construction debris and silica stored along busy city roads and service lanes continues to choke several parts of Gurugram, despite restrictions under stage 4 of the Graded Response Action Plan, an HT spot check on Tuesday found.

The findings came on a day when the Commission for Air Quality Management announced the revocation of Grap-4 restrictions across Delhi NCR following a marginal improvement in air quality. Delhi's Air Quality Index was recorded at 378 on Tuesday, remaining in the "very poor" category, compared with 410 on Monday and 440 on Sunday. The stricter curbs under Grap-4 were imposed on Saturday, January 17, after air quality slipped into the "severe" category.

The spot check reveale...