India, Nov. 1 -- Delhi's worsening air quality has once again hit home for many residents this week, as a founder's X (formerly Twitter) post vividly captured just how toxic the air has become.

Kapil Dhama, Founder of Options360, shared that he runs four air purifiers round the clock in his house. Yet, when he opened his main door for just a moment, the air quality reading inside jumped dramatically from around 97 to 500 AQI within a minute.

"4 purifiers running 24x7 at home. Life has become hell in NCR," the caption of the post reads.

In the short video, the founder opens his main door and points the camera at a running air purifier. The display first shows a reading of 97, suggesting the air inside is clean and safe to breathe. But w...