Urban Indian private schools at risk of proximity to toxic lead sites: report

Urban Indian private schools at risk of proximity to toxic lead sites: report

GS-III: Environment | Pollution | Public Health

Context

A report titled “Schools in the Shadow of Toxic Sites: Pollution Proximity in Low- and Middle-Income Countries” by the Center for Global Development (CGD) found that 10% of schools in LMICs are located within 5 km of a documented toxic site.

Among the world’s capital cities, New Delhi recorded the highest exposure, with over 90% of its private schools located near sites contaminated with lead, mercury, cadmium, arsenic and/or pesticides.

Key findings of the report

• Study coverage: Mapped 2.6 million schools against 11,301 documented toxic sites across 17 countries.
• Urban concentration: Toxic-site exposure is concentrated in urban areas.
• School exposure: 9.7% of schools in the sample were located within 5 km of a contaminated site.
• Global burden: Nearly one billion children are estimated to have some level of lead exposure globally.

Why is lead exposure a concern?

• No safe exposure level: No amount of lead exposure is considered safe for humans.
• Health impacts: Lead exposure can cause kidney disease, heart disease and high blood pressure.
• Impact on children: Damages myelin, disrupts brain cell connections and is associated with reduced attention span, behavioural disorders, aggression and permanent decline in IQ.
• Economic cost: According to the World Bank, childhood lead exposure costs LMICs $1 trillion annually.

Major source of lead contamination

• Lead-acid batteries: Account for 86% of global lead consumption.
• Informal recycling: Old batteries are dismantled and melted in informal recycling units without adequate environmental safeguards.
• Environmental contamination: Lead enters the soil and subsequently contaminates food, water and air.
• India: Despite having more than 350 authorised recycling units, nearly 90% of lead-acid battery waste enters the informal recycling network.

Key observations

• Exposure pattern: Unlike high-income countries, urban schools in LMICs are 4 to 28 times more likely than rural schools to be located near toxic sites.
• Reason: Weak regulation allows recycling activities to operate close to densely populated areas.
• Invisible threat: Lead contamination often remains unnoticed despite its severe long-term health impacts.

Cities with high school exposure

• New Delhi: 91.2%
• Manila: 86%
• Nairobi: 71%
• Accra: 67%
• Jakarta: 51%

Positive example

Mexico City: Industrial manufacturing zones have been regulated and separated from residential areas, resulting in minimal toxic-site exposure around schools.

Concerns

• Weak regulation: Informal recycling continues due to poor enforcement.
• Public health risk: Children remain highly vulnerable to toxic exposure.
• Urban planning: Recycling activities continue in densely populated localities.
• Environmental pollution: Unsafe recycling contaminates soil, air and water.

Conclusion

• Key challenge: Lead pollution from informal recycling has emerged as a major public health and environmental concern in LMICs.
• Need: Stronger regulation of toxic sites and safer recycling practices are essential to reduce children’s exposure to hazardous pollutants.

UPSC Mains Practice Question

Q. Lead pollution from informal recycling has emerged as an important environmental and public health challenge in low- and middle-income countries. Discuss in the light of the recent CGD report on schools located near toxic sites.