Chemicals from plastic waste contaminating water sources near Jaipur dumping yard: Study

A year-long scientific study by the Department of Environmental Science, Central University of Rajasthan, Ajmer, found dangerously high concentrations of Bis...

What Happened

A year-long scientific study by the Department of Environmental Science, Central University of Rajasthan, Ajmer, found dangerously high concentrations of Bisphenol A (BPA) contaminating soil and water sources near the Mathuradaspura dumping yard on the outskirts of Jaipur, Rajasthan.
BPA levels in soil near the dumping yard reached up to 770.8 mg/L and in nearby water samples up to 798.9 mg/L — approximately 300 times the European Union's drinking water limit of 2.5 mg/L for BPA.
Soil and water samples were collected on three occasions from multiple sites within a two-kilometre radius of the landfill.
The study also found Polyethylene Terephthalate (PET) microplastics from degrading plastic bottles, which caused weakened cell membranes, reduced photosynthesis, and stunted plant growth in controlled experiments on chickpea plants.
India currently has no specific regulations mandating routine testing of agricultural soil or water for BPA — a regulatory gap exposed by the study.

Static Topic Bridges

Bisphenol A (BPA) — Endocrine Disruptor

BPA (Bisphenol A) is a synthetic industrial chemical used in the manufacture of polycarbonate plastics, epoxy resins, food-grade containers, and can linings. It is classified as an endocrine disruptor — meaning it mimics or interferes with the body's hormone system, particularly oestrogen pathways.

The European Chemicals Agency (ECHA) recognised BPA as a substance of very high concern (SVHC) due to its endocrine disrupting properties in 2017; the EU subsequently banned BPA in baby bottles (2011) and set a drinking water limit of 2.5 mg/L.
Health effects of BPA exposure include reproductive disorders, developmental issues in children, immune system dysfunction, metabolic disruption, and increased risk of hormone-dependent cancers.
BPA leaches into soil and water when plastic waste degrades at dump sites — the process accelerates under heat and UV exposure, conditions prevalent at open dump yards in India.
India has not established BPA-specific limits in the Bureau of Indian Standards' drinking water specification (IS:10500) or in CPCB soil quality guidelines.

Connection to this news: The study's core finding is that BPA from landfill plastic leachate is entering the food and water chain near a major Indian city at concentrations hundreds of times above internationally accepted safety limits, in the absence of any domestic regulatory standard to trigger remediation.

Plastic Waste Regulation in India

India generates approximately 3.5–4 million tonnes of plastic waste annually (CPCB estimates). The principal regulatory frameworks are the Plastic Waste Management (PWM) Rules 2016 (amended 2018, 2022) and the Solid Waste Management (SWM) Rules 2016, both enacted under the Environment Protection Act 1986.

PWM Rules 2016 ban plastics below 50 microns in thickness and establish Extended Producer Responsibility (EPR) obligations for plastic manufacturers, importers, and brand owners; amended in 2022 to significantly expand EPR requirements.
SWM Rules 2016 specify that dump sites must be located at least 200 metres from habitations, ponds, and highways, and 100 metres from rivers; they mandate phased closure and scientific remediation of legacy open dump sites.
India announced a ban on single-use plastics (SUPs) below specified thickness effective July 1, 2022, covering 19 categories of items including straws, cutlery, and packaging films.
New Solid Waste Management Rules notified in 2025–26 further tighten landfill siting and bioremediation requirements.
Despite these frameworks, enforcement remains weak: a 2023 CPCB report found that most Indian cities still operate un-engineered open dumps rather than compliant sanitary landfills.

Connection to this news: The Mathuradaspura dumping yard represents a category of legacy open dump sites that SWM Rules 2016 mandate be remediated or scientifically capped — the study provides direct evidence of leachate contamination that should trigger action under existing regulatory frameworks.

Landfill Leachate and Groundwater Contamination

Landfill leachate is liquid formed when water percolates through solid waste, dissolving and carrying soluble organic and inorganic compounds including heavy metals, persistent organic pollutants, and industrial chemicals like BPA. In unlined or poorly lined dump sites — the norm for most Indian cities — leachate migrates directly into surrounding soil and groundwater.

India's urban solid waste management gap: as of 2023–24, approximately 60% of collected municipal solid waste is processed; the remainder goes to open dumps.
Leachate contamination of groundwater is an acute concern because around 163 million Indians rely on groundwater for drinking water (Census 2011 projections updated by CGWB).
The Rajasthan State Pollution Control Board (RSPCB) and the Central Pollution Control Board (CPCB) are the statutory bodies responsible for monitoring and enforcement of landfill standards under the Water (Prevention and Control of Pollution) Act 1974.

Connection to this news: The study's sampling within a two-kilometre radius of the Mathuradaspura site, showing 798.9 mg/L BPA in water, points to active leachate migration into local water sources — a direct groundwater contamination risk for communities relying on wells and borewells in the vicinity.

Impact on Agriculture and Food Safety

The study's experiments on chickpea (Cicer arietinum) — a major Rabi crop in Rajasthan — showed that BPA and PET microplastics at concentrations found near the site caused 70–80% decline in plant growth at higher concentrations, reduced seed germination rates, and decreased chlorophyll and protein levels.

Chickpea is India's largest pulse crop by area, with Rajasthan being a major producing state.
BPA absorbed by crops can enter the human food chain, compounding direct water exposure risks.
The Food Safety and Standards Authority of India (FSSAI) has not established BPA-specific maximum residue limits (MRLs) for food or agricultural produce, creating a regulatory blind spot.

Connection to this news: The agricultural contamination pathway (soil → crop → human consumption) identified by the study represents a food safety dimension beyond drinking water — one currently unaddressed by either FSSAI or CPCB regulatory frameworks.

Key Facts & Data

Study institution: Department of Environmental Science, Central University of Rajasthan, Ajmer
Location studied: Mathuradaspura dumping yard, outskirts of Jaipur, Rajasthan
Study duration: One year (multiple sampling rounds)
Sampling radius: Within 2 km of the dumping yard
BPA in soil (peak): 770.8 mg/L
BPA in water (peak): 798.9 mg/L
EU BPA drinking water limit: 2.5 mg/L (i.e., study findings are ~300x above EU limit)
India's BPA standard: None — no BPA limits in IS:10500 drinking water spec or CPCB soil guidelines
Chemical of concern: Bisphenol A (BPA) — endocrine disruptor; ECHA-classified Substance of Very High Concern (2017)
Microplastic found: Polyethylene Terephthalate (PET) — from degraded plastic bottles
Agricultural impact: 70–80% decline in chickpea plant growth at higher BPA concentrations; reduced germination, chlorophyll, and protein
Key regulatory acts: Environment Protection Act 1986; Plastic Waste Management Rules 2016 (amended 2022); Solid Waste Management Rules 2016; Water (Prevention and Control of Pollution) Act 1974
Enforcement bodies: CPCB (central), RSPCB (Rajasthan state)
India's annual plastic waste: ~3.5–4 million tonnes (CPCB)