BOOM

Trending Searches

    SUPPORT
    BOOM

    Trending News

      • Fact Check 
        • Fast Check
        • Politics
        • Business
        • Entertainment
        • Social
        • Sports
        • World
      • Law
      • Explainers
      • News 
        • All News
      • Decode 
        • Impact
        • Scamcheck
        • Life
        • Voices
      • Media Buddhi 
        • Digital Buddhi
        • Senior Citizens
        • Videos
      • Web Stories
      • BOOM Research
      • BOOM Labs
      • Deepfake Tracker
      • Videos 
        • Facts Neeti
      • Home-icon
        Home
      • About Us-icon
        About Us
      • Authors-icon
        Authors
      • Team-icon
        Team
      • Careers-icon
        Careers
      • Internship-icon
        Internship
      • Contact Us-icon
        Contact Us
      • Methodology-icon
        Methodology
      • Correction Policy-icon
        Correction Policy
      • Non-Partnership Policy-icon
        Non-Partnership Policy
      • Cookie Policy-icon
        Cookie Policy
      • Grievance Redressal-icon
        Grievance Redressal
      • Republishing Guidelines-icon
        Republishing Guidelines
      • Fact Check-icon
        Fact Check
        Fast Check
        Politics
        Business
        Entertainment
        Social
        Sports
        World
      • Law-icon
        Law
      • Explainers-icon
        Explainers
      • News-icon
        News
        All News
      • Decode-icon
        Decode
        Impact
        Scamcheck
        Life
        Voices
      • Media Buddhi-icon
        Media Buddhi
        Digital Buddhi
        Senior Citizens
        Videos
      • Web Stories-icon
        Web Stories
      • BOOM Research-icon
        BOOM Research
      • BOOM Labs-icon
        BOOM Labs
      • Deepfake Tracker-icon
        Deepfake Tracker
      • Videos-icon
        Videos
        Facts Neeti
      Trending Tags
      TRENDING
      • #Operation Sindoor
      • #Pahalgam Terror Attack
      • #Narendra Modi
      • #Rahul Gandhi
      • #Waqf Amendment Bill
      • #Arvind Kejriwal
      • #Deepfake
      • #Artificial Intelligence
      • Home
      • Issues
      • 15 Days After Odd-Even, Delhi's PM...
      Issues

      15 Days After Odd-Even, Delhi's PM 2.5 Levels Rise 15%

      By - IndiaSpend Team |
      Published -  16 Jan 2016 4:09 PM IST
    • Boomlive

      Delhi Truck terminal_2

      An IndiaSpend study of Delhi's air quality during the trial period of the odd-even scheme showed an increase in PM 2.5 levels. This indicates the need to understand deeper the impact of policy changes, such as the odd-even measure, on Delhi's air.

      Air-pollution levels in Delhi rose 15% during the 15-day period (January 1 to 15, 2016) of the state government's odd-even measure over the previous 15 days (December 17 to 31, 2015), according to an analysis of PM (particulate matter) 2.5 data, generated by IndiaSpend's#Breathe air-quality monitoring devices.

      The increase in PM 2.5 level indicates the need to understand deeper the impact of policy changes, such as the odd-even measure, on Delhi's air, as IndiaSpend reported, and, with four-wheeled vehicles accounting for no more than 10% of the city's overall vehicular pollution load, according to a new Indian Institute of Technology (IIT) study, the need for other measures is obvious.

      Source: #Breathe; Note: Data for Jan 7, 2016 is from 12 AM to 6 PM, data for Jan 8, 2016 is from 12 PM to 11:59 PM, for Dec 31, 2015 and Jan 15, 2016 the data is from 12 AM to 4:30 PM.

      Average PM 2.5 concentration in Delhi's air was 309 micrograms per cubic metre (µg/m³) during the period when the odd-even experiment was in force (January 1 to 15, 2016), remaining at 'severe' levels, according to the guidelines of the Central Pollution Control Bureau (CPCB). This kind of air can affect healthy people and seriously impact those with existing diseases.

      Compared to this, average PM 2.5 concentration was 270µg/m³ in the 15 days prior to the odd-even experiment.

      Our analysis is based on weekly average data recorded by three #Breathe devices across Delhi at Sarvodaya Enclave, India Habitat Centre and Munirka.

      IndiaSpend's breathe air quality network was discussed in this India Today broadcast:

      PM 2.5 levels dropped 37% from week 3 (January 1 to 7, 2016) to week 4 (January 8 to 14, 2016), based on a weekly analysis of PM 2.5 concentration data (refer to graph below). The odd-even scheme was active during this period.

      Source: #Breathe; Note: Data for Jan 7, 2016 is from 12 AM to 6 PM, data for Jan 8, 2016 is from 12 PM to 11:59 PM, for Dec 31, 2015 and Jan 15, 2016 the data is from 12 AM to 4:30 PM.

      This decrease could be attributed by an increase in wind-speed, which dissipated air pollutants, as these tweets on Saturday, January 16, 2016, indicated:

      This comes after a 50% increase in PM 2.5 concentration from week 2 to week 3, as we reported last week.

      PM 2.5 are fine particulate matter with a diameter of 2.5 micrometres or less and are known to pose the greatest risk to human beings. Their measurement is considered to be the best indicator of the health risks from air pollution, according to the World Health Organization (WHO).

      On average, daily PM 2.5 concentration levels have been above 250 µg/m³ on 11 out of 15 days during which the odd-even rule was enforced, attaining a 'severe' rating. The remaining four days witnessed 'very poor' conditions. This could lead to respiratory illness on prolonged exposure.

      Source: #Breathe; Note: Data for Jan 7, 2016 is from 12 AM to 6 PM, data for Jan 8, 2016 is from 12 PM to 11:59 PM, for Dec 31, 2015 and Jan 15, 2016 the data is from 12 AM to 4:30 PM.

      Five out of the 15 days prior to the odd-even experiment witnessed 'very poor' PM 2.5 concentration, while 10 days saw 'severe' conditions.

      PM 10 (particles between 2.5 to 10 µm in diameter), during the 15-day odd-even experiment, recorded 'severe' ratings for eight days, 'very poor' for four days and 'poor.'

      Source: #Breathe; Note: Data for Jan 7, 2016 is from 12 AM to 6 PM, data for Jan 8, 2016 is from 12 PM to 11:59 PM, for Dec 31, 2015 and Jan 15, 2016 the data is from 12 AM to 4:30 PM.

      The 15 days prior to the odd-even experiment saw two days of 'severe' PM 10 concentration, eight day of 'very poor' and two days of 'severe' conditions.

      The hourly average PM 2.5 levels for the 15 days before Jan 1, 2016 were the highest between 7 am and 8 am (366 µg/m3), and lowest between 3 pm and 4 pm (137 µg/m3). In comparison, since Jan 1, 2016, they have both risen. The hourly average for 7 am to 8 am has risen 2% to 374 µg/m3 and the low at 3 pm to 4 pm has risen 54% to 211 µg/m3.

      Source: #Breathe; Note: Data for Jan 7, 2016 is from 12 AM to 6 PM, data for Jan 8, 2016 is from 12 PM to 11:59 PM, for Dec 31, 2015 and Jan 15, 2016 the data is from 12 AM to 4:30 PM.

      Road dust is leading polluter, trucks second and two-wheelers third. Cars are fourth

      Vehicles are number four in the hierarchy of pollution sources, accounting for 20% of PM 2.5 and 9% of PM 10 concentration in Delhi's air, according to a new study—one of the most comprehensive in recent times—by IIT, Kanpur.

      Road dust is the city's biggest polluter, accounting for 38% of PM 2.5 and 56% of PM 10 concentration. There are many more measures that Delhi needs to adopt to control pollution, as IndiaSpend reported earlier, and as the government says it will, according to thisannouncement.

      Two wheelers, which are exempt from the odd-even rule, account for 33% of all PM10 and PM 2.5 emissions by vehicles, according to the IIT-Kanpur study.

      Trucks emit 46% of all PM10 and PM 2.5, among vehicles, and are allowed to ply on roads only after 10:30 pm. Previously, they could travel 9 pm onwards.

      Four-wheelers contribute to 10% of all PM 10 and PM 2.5 emissions by vehicles.

      This article was republished from IndiaSpend.org.

      Tags

      #OddEven#OddEvenFormula#OddEvenPlanIIT_Kanpurparticulate matterPM 10PM 2.5New Delhi
      Read Full Article
      Next Story
      Our website is made possible by displaying online advertisements to our visitors.
      Please consider supporting us by disabling your ad blocker. Please reload after ad blocker is disabled.
      X

      Subscribe to BOOM Newsletters

      👉 No spam, no paywall — but verified insights.

      Please enter a Email Address
      Subscribe for free!

      Stay Ahead of Misinformation!

      Please enter a Email Address
      Subscribe Now🛡️ 100% Privacy Protected | No Spam, Just Facts
      By subscribing, you agree with the Terms & conditions and Privacy Policy connected to the offer

      Thank you for subscribing!

      You’re now part of the BOOM community.

      Or, Subscribe to receive latest news via email
      Subscribed Successfully...
      Copy HTMLHTML is copied!
      There's no data to copy!