Network Updates / Bengaluru, India / 2021-04-27

Bengaluru Schoolchildren Breathing Polluted Air: Report:
Study finds Bengaluru’s schoolchildren are exposed to air pollution levels above WHO guidelines

Children are particularly vulnerable to the health impacts of air pollution as they breathe in higher concentrations of pollutants and as their bodies are still developing. Potentially all two million of Bengaluru’s schoolchildren are exposed to air pollution levels above WHO guidelines.

Bengaluru, India
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Bengaluru, 22 April, 2021:- Up to two million schoolchildren (20 lakhs) in Bengaluru, India are potentially exposed to dangerous air pollution during their school day, risking asthma, allergic rhinitis and other chronic health impacts, according to a report released today by Healthy Air Coalition, Bengaluru.

The report, Protecting Bengaluru’s Children: Time To Act For Clean Air Around Schools examined air quality data recorded in the vicinity of 270 schools for 14 months, finding that 70,000 children attending these schools are breathing polluted air all year round, with particularly poor air quality during the seven months of October to April, as well during school departure times throughout the year.

Across Bengaluru, there are an estimated two million school-aged children between five and nineteen [1]. Given that the schools contained in the report, which are located throughout city major areas, had health-harming pollution, potentially all of Bengaluru’s schoolchildren are exposed to air pollution levels above WHO guidelines.

“Policy makers and local authorities must take action and responsibility to ensure that the children of Bengaluru are protected from both short and long term effects of air pollution”, said Dr K.R. Bharath Kumar Reddy, Director Shishuka Children’s Speciality Hospital, member of the International Pediatric Association’s IPA LEAD: Child Health Emerging Leaders Program, and the report’s principal researcher. The report is supported by GCHA (Global Climate and Health Alliance) and HEAL (Health and Environment Alliance).

“Unless urgent action is taken by government agencies and the Chief Secretary of Karnataka to swiftly reduce air pollution in Bengaluru, we will be dealing with a significantly greater health burden in the future”.

Schoolchildren in classroom

Children are particularly vulnerable to the health impacts of air pollution as they breathe in higher concentrations of pollutants and as their bodies are still developing, amongst other reasons. Effects of poor air quality can be acute especially for children with chronic conditions like asthma, but are also long-term, impacting a child’s lungs, heart, brain and nervous system, and increasing their risk for diseases that can manifest decades later.

The study used data from an independent monitoring network set up in 27 major locations in 18 districts of Bengaluru by the Healthy Air Coalition, including at some of the city’s busiest roads, including Brigade Road – one of the city’s key shopping districts – and at Jayachamarajendra Road (aka JC Road) site of the city’s town hall, and Corporation Circle. The study also looked at Bengaluru’s tech hub Electronic City, as well as the highly congested Bannerghatta Road.

The monitors are calibrated on an ongoing basis with one monitor co-located with an official, regulatory monitor. Data were recorded in real-time on a continuous basis, 24 hours a day, between June 2019 – July 2020.

Given that Bengaluru experienced a lockdown due to the covid-19 pandemic, with a consequent 28% drop in pollution, the results are likely to be an underestimate [2].

Air quality measurements for Brigade Road (12 schools) and JC Road (10 schools) found average PM2.5 values (during school hours) of 40 ug/m3 and 37 ug /m3 respectively, while Corporation Circle (8 schools) measured 29 ug/m3.

The World Health Organization (WHO) considers daily concentrations for particulate matter PM2.5 above 25 ug/m3, and average annual concentrations above 10 ug/m3 to be harmful to health. Particulate matter with a size of less than 2.5 micrometers (PM2.5), is the pollutant which causes the greatest harm to human health. The US Environmental Protection Agency has set a standard of 35 ug/m3 for the daily concentration limit, and 12 ug/m3 as the annual average, while the Indian clean air standard is 60 ug/m3 for the day, and 40 ug/m3 for the year [2].

In comparison, the average concentrations in Bengaluru during June 2019 – July 2020 reached 40.7 ug/m3, well above the annual WHO guidelines and US EPA standards, and slightly above the Indian clean air standard. Between the months October to April, air quality was particularly poor (above daily EPA standard), and for December 2019 and January 2020, the PM values were even above the Indian daily national clean air standard.

“As a city of high popularity with major growth and as India’s IT capital, Bengaluru holds great potential to pave the way for green, healthy cities in what is now one of the most polluted countries”, continued Dr Reddy. “Currently, however, pollution levels in the city are harmful to health, and a threat especially to children in the city.”

“As a Pediatric Pulmonologist, I consult children with asthma and allergic rhinitis on a daily basis. Many of these children have flare-ups of asthma when exposed to indoor and outdoor air pollution. I took up the cause of clean air in Bengaluru city to ensure that our children are protected from the effects of air pollution”, he added.

“This report helps us to understand the air quality during school opening and closing hours. Schools now have some data which can be useful in planning the school timings”, said leading educationist Dr Tristha Ramamurthy, Founder, Ekya Schools. “Simple measures like restriction of heavy traffic in school zones especially during school hours will help reduce students’ exposure to PM. We educators must also open dialogues with our parents and children on the health effects of air pollution. [4]”

“Improving air quality, both locally and globally, is key to sustainable development and to advancing ‘health for all’”, said Dr Linda Arnold, Director, IPA LEAD: Child Health Emerging Leaders Program & Associate Professor of Pediatrics and Emergency Medicine, Yale School of Medicine, who contributed to the report.

“Children are especially vulnerable to the adverse health effects of air pollution, but have no control over environments where they live, learn and play. We have a duty to protect children from airborne toxins, because they can’t protect themselves. Doing so requires political will, a multi-sector commitment to improving air quality, and sustained collaboration towards comprehensive solutions. It also requires better monitoring of levels and sources of air pollution, to inform efforts to minimize children’s exposure”, she added.

Protecting Bengaluru’s Children: Time To Act For Clean Air Around Schools calls for Indian policy makers on local and regional level to prioritise air quality, particularly in and around schools where its most vulnerable citizens spend a large part of their days. Locally and in the short term, this includes restricting traffic around school areas and possibly even closing school roads, to ensure a reduction in pollution levels. In the long term it must also mean investments in clean, sustainable modes of transport, including safe cycling lanes, electric buses and cars and the restriction of any industrial and construction activity close to schools.

The report can be downloaded here. 


[1] Census 2011, number calculated from all children aged 6-17/18 (primary to high secondary schools in Bengaluru, totals 1,948,151 or 19,48,151 lakhs.

[2] City air pollution dropped by 28% in Bengaluru during Covid-19 lockdown, new analysis reveals

[3] World Health Organization: Air quality guidelines – global update 2005

United States Environmental Protection Agency – National Ambient Air Quality Standards (NAAQS) for PM

[4] Epidemiology of asthma in India, H Paramesh


Cross posted from Health and Environment Alliance (HEAL)

Photos © Nikhita S. via unsplash

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