Stubble burning by farmers in the bank of Yamuna river, near Mayur Vihar in New Delhi.(Mohd Zakir/HT File Photo)
Stubble burning by farmers in the bank of Yamuna river, near Mayur Vihar in New Delhi.(Mohd Zakir/HT File Photo)

As rain goes away, Delhi pollution starts rising ahead of Diwali season

The air quality in Delhi is generally the best during the monsoons when rains help settle local dust and strong winds prevent accumulation.
By HT Correspondent | Hindustan Times, New Delhi
UPDATED ON SEP 29, 2018 07:20 AM IST

The air quality has started to worsen in the national capital region with levels of particulate matter surpassing safe limits on Friday — barely three days after the last of the monsoon rains— heralding the beginning of a period of pollution that stretches well into winters and is regarded a public health hazard.

The spike mainly was in the levels of PM10 – dust particles roughly a fifth of the diameter of an average human hair. On Tuesday, at around 1pm, the concentration of PM10 in air was recorded at 35ug/m3. By 8pm on Friday, it had crossed 222ug/m3, exceeding the safe limit of 100ug/m3.

The air quality in Delhi is generally the best during the monsoons when rains help settle local dust and strong winds prevent accumulation.

In the past 48 hours, weather experts have said, the wind patterns have changed.

“This happens during this time of the year when the weather transitions from monsoon to winter. The wind becomes calmer and moisture declines. Loose soil on the surface is getting suspended in the air but is not getting dispersed. As a result local pollution is building up,” said D Saha, former head of the CPCB’s air quality laboratory.

The wind speed at 5.30pm on Friday in Delhi had dropped to almost 0kmph, which meteorologists term as ‘calm wind’. The minimum relative humidity dropped from 71% on Monday to 53% on Friday. On Friday, the overall air quality index (AQI) of 198 was on the cusp of ‘poor’ category that begins from 201. “While the overall AQI value on Wednesday was 88, on Friday it was recorded to be 198. The AQI value on Monday, the day Delhi received its last monsoon rain, was 52,” said a senior official of the Central Pollution Control Board’s air quality laboratory.

The AQI is a measure of PM10 and smaller PM2.5 particles, as well as concentration of gases such as carbon monoxide and nitrous oxides. ‘Poor’ is the third lowest of six grades classifying air pollution.

In November last year, the air remained in the worst ‘severe’ category for nearly a fortnight, enveloping the region in a thick haze and forcing authorities to order the closure of schools as young children and elderly were advised to avoid going outdoors.

“The AQI at present is still better than what it was in 2016 and 2017 during this time of the year. Last year the air quality had turned poor by this time as the AQI had crossed the 200 mark,” said a scientist of the Delhi Pollution Control Committee. The withdrawal of monsoon is expected to be announced in less than a week. The announcement is done after several meteorological conditions are fulfilled – one among which is a dry spell lasting at least five days.

“We are expecting monsoon would start its withdrawal within the next 48 hours from west Rajasthan. It is expected to withdraw from Delhi in less than a week’s time,” said BP Yadav, deputy director general of the Met department.

SHARE THIS ARTICLE ON
app
Close
The minimum temperature rose to eight degrees Celsius as a result of easterly winds and a cloud cover over the national capital, an IMD official said.(Raj K Raj / HT Photo)
The minimum temperature rose to eight degrees Celsius as a result of easterly winds and a cloud cover over the national capital, an IMD official said.(Raj K Raj / HT Photo)

Delhi's minimum temperature rises to 8 degree Celsius

PTI, New Delhi
PUBLISHED ON JAN 23, 2021 10:31 AM IST
A fresh Western Disturbance (WD) affecting the western Himalayas provided some relief from the chill.
Close
An authority notice said no non-scheduled flight will be allowed to operate from 10am-1pm from January 20 to 26.(Vipin Kumar/HT PHOTO)
An authority notice said no non-scheduled flight will be allowed to operate from 10am-1pm from January 20 to 26.(Vipin Kumar/HT PHOTO)

No flights to, from Delhi airport from 10am-12.15pm till January 26

PUBLISHED ON JAN 23, 2021 07:34 AM IST
However, the restriction will not be applicable to the movements of the Indian Air Force, the Border Security Force, the Indian Army or helicopters, the notice said.
Close
Today she shares a poem she wrote when brother, Vikas, was starting a new life in Europe. (While posing for a snap, her younger son, Samarth, tiptoes from behind, and photo-bombs the portrait.)
Today she shares a poem she wrote when brother, Vikas, was starting a new life in Europe. (While posing for a snap, her younger son, Samarth, tiptoes from behind, and photo-bombs the portrait.)

Delhiwale: Stories on the move

By Mayank Austen Soofi
PUBLISHED ON JAN 23, 2021 04:10 AM IST
Jyoti Vij Ahuja is also a writer, who exploited the pandemic by compiling her short stories into a self-published e-book, Marital Bliss & Other Things.
Close
Earlier, the Delhi Police proposed a route map to the farmers where they could hold a tractor rally on January 26.(ANI file photo)
Earlier, the Delhi Police proposed a route map to the farmers where they could hold a tractor rally on January 26.(ANI file photo)

Farmers at Singhu border allege bid to infiltrate, spark violence

By shiv sunny, Anvit Srivastava
UPDATED ON JAN 23, 2021 02:14 AM IST
The development came on a day when talks between the farmers and the government broke down, and they said they will go ahead with their January 26 tractor rally inside the national capital – a demonstration that the government is attempting to avert.
Close
Three districts in the Capital have so far recorded a coverage rate lower than Delhi’s average — Shahdara, North (43.3%) and New Delhi (47.6%).(AFP)
Three districts in the Capital have so far recorded a coverage rate lower than Delhi’s average — Shahdara, North (43.3%) and New Delhi (47.6%).(AFP)

Only 35% health care workers in Delhi's Shahdara district have got jab so far

By Anonna Dutt, Abhishek Dey
UPDATED ON JAN 23, 2021 01:49 AM IST
The nationwide Covid-19 vaccination drive kicked off on January 16, after which registered health care workers in the Capital have received shots on January 18, 19 and 21 across 81 inoculation centres.
Close
The interventions suggested by the tool can be implemented by the pollution control boards and its implementation can be monitored by citizen watch groups and NGOs, the statement said.(Arvind Yadav/HT Photo)
The interventions suggested by the tool can be implemented by the pollution control boards and its implementation can be monitored by citizen watch groups and NGOs, the statement said.(Arvind Yadav/HT Photo)

Air quality panel ropes in agencies to develop tool to read nature of emissions

PUBLISHED ON JAN 23, 2021 01:28 AM IST
The sources of emissions covered will include industries, transport, power plants, residential, DG sets, road dust, agricultural burning, refuse burning, construction dust, ammonia, volatile organic compounds, landfills etc.
Close
On Friday, Kejriwal chaired a review meeting on the project in which he directed officials of the DSIIDC – a government company with the expertise of infrastructure development in industrial areas – to strictly stick to deadlines.(ANI Photo)
On Friday, Kejriwal chaired a review meeting on the project in which he directed officials of the DSIIDC – a government company with the expertise of infrastructure development in industrial areas – to strictly stick to deadlines.(ANI Photo)

Deadline extended by nine months for phase 1 of Rani Khera business park project

PUBLISHED ON JAN 23, 2021 01:22 AM IST
The business park – spread over an area of 150 acres in Rani Khera village near the Indira Gandhi International Airport – is meant to become a hub for enterprises in the technology and services sectors.
Close
Officials from the Union environment ministry said they were keeping a close watch to ensure more bird flu cases are not reported from the Delhi zoo or any other part of the Capital.(AFP Photo. Representative image)
Officials from the Union environment ministry said they were keeping a close watch to ensure more bird flu cases are not reported from the Delhi zoo or any other part of the Capital.(AFP Photo. Representative image)

Delhi: Six samples from zoo test negative for avian flu

PUBLISHED ON JAN 23, 2021 01:03 AM IST
Ramesh Pandey, director, National Zoological Park in Delhi said that while the zoo has not reported any fresh case of the flu, safety protocols have not been relaxed.
Close
IMD scientists said the drop in temperature on Friday was caused because the fog layer in the early hours moved further away from the ground, which did not allow temperatures to rise during the day.(Sanchit Khanna/HT file photo)
IMD scientists said the drop in temperature on Friday was caused because the fog layer in the early hours moved further away from the ground, which did not allow temperatures to rise during the day.(Sanchit Khanna/HT file photo)

Delhi gets colder: Temperature to fall further from Sunday, IMD predicts

PUBLISHED ON JAN 23, 2021 12:42 AM IST
On Friday, the minimum temperature recorded at Delhi’s Safdarjung weather station, considered the official marker for the city, was 4.2°C — three below the season’s normal. The maximum temperature, meanwhile, was 18.6°C — three below normal.
Close
HT Image
HT Image

‘Presumption of innocence’ should not be destroyed, court says while hearing riots case

By Press Trust of India, New Delhi
PUBLISHED ON JAN 23, 2021 12:20 AM IST
A city court on Friday said the “presumption of innocence” should not be destroyed at the threshold of the justice process through a media trial, while hearing a plea moved by former Jawaharlal Nehru University student Umar Khalid alleging a “vicious media campaign” against him in a Delhi riots case
Close
HT Image
HT Image

Only 35% health care workers in Shahdara district have got Covid jab so far, lowest in Delhi

By Anonna Dutt and Abhishek Dey, New Delhi
UPDATED ON JAN 23, 2021 12:20 AM IST
After four rounds of Covid-19 inoculation in the national capital, Shahdara district has seen the lowest number of health care workers immunised so far, with a little more than 1/3rd of all targeted beneficiaries receiving the jab over the past week
Close
HT Image
HT Image

Three held for running fake call centre, duping job aspirants of money

By HT Correspondent, New Delhi
PUBLISHED ON JAN 23, 2021 12:18 AM IST
Police on Friday said they had arrested three persons for allegedly running a fake call centre through which they were cheating job aspirants of money by offering them jobs in a non-existent automobile company
Close
HT Image
HT Image

Airspace restrictions in place till R-Day

By HT Correspondent, New Delhi
PUBLISHED ON JAN 23, 2021 12:18 AM IST
Due to the closure of airspace on account of Republic Day celebrations and rehearsals, no scheduled flight will operate from Delhi’s Indira Gandhi International Airport daily between 10am and 12
Close
HT Image
HT Image

Deadline extended by nine months for phase 1 of Rani Khera business park project

By HT Correspondent, New Delhi
PUBLISHED ON JAN 23, 2021 12:17 AM IST
The Delhi government has pushed the deadline for the completion of the first phase of the upcoming business park at Rani Khera by nine months, in view of the delay caused by the Covid-19 pandemic, said a senior government official on Friday
Close
HT Image
HT Image

Commercial vehicle owners duped of cash by racketeers who gave them forged entry stickers

By Karn Pratap Singh, New Delhi
UPDATED ON JAN 23, 2021 12:16 AM IST
Police are looking for an organised syndicate involved in issuing fake “No Entry Permission (NEP)” stickers to commercial goods vehicles for plying in Delhi during restricted hours, thus duping vehicle owners of money and also causing financial losses to the government
Close
SHARE
Story Saved
OPEN APP