In News:

A first-of-its-kind study, commissioned by the Delhi government and conducted by The Energy and Resources Institute (TERI), has revealed the presence of microplastics in groundwater across all 11 districts of Delhi. The interim findings, submitted in November 2024, also reported microplastics in Yamuna River water and soil samples along its banks.

Key Findings:

• Widespread Contamination: Microplastics were found in groundwater samples across Delhi, indicating potential contamination due to leaching from the Yamuna River.
• Additional Contamination: Microplastics were also detected in the Yamuna's water and riverbank soil, suggesting environmental pervasiveness.
• Water Usage Impact: Since Delhi relies on borewells and treated groundwater for drinking and domestic purposes, this contamination raises serious public health concerns.
• No Objection by Authorities: The Delhi government has not disputed the study’s interim findings; further post-monsoon analysis is underway, and a final report is expected later in 2025.

What Are Microplastics?

According to the UN Environment Programme (UNEP):

• Definition: Plastic particles less than 5 mm in size
• Types:
  • Primary Microplastics: Manufactured for use in cosmetics (e.g., microbeads) and textiles (e.g., microfibers from clothing, nets)
  • Secondary Microplastics: Result from breakdown of larger plastics (e.g., bottles) due to sunlight, abrasion, and ocean waves

Environmental & Health Impacts:

• Persistence: Microplastics are non-biodegradable, mobile, and difficult to eliminate from natural ecosystems.
• Toxicity:
  • Can adsorb harmful chemicals, making them more toxic
  • Known to bioaccumulate in aquatic food chains
• Human Exposure: Microplastics can enter the human body via:
  • Inhalation (air)
  • Ingestion (water and seafood)
  • Dermal absorption (through skin)
• Health Risks (UNEP Report – From Pollution to Solution, 2021):
  • Potential effects on genetics, brain development, respiration, and placental health in newborns
  • No global standard exists for safe microplastic limits in drinking water