Microplastics in India Explained

In India, microplastics are tiny plastic particles smaller than five millimetres that have turned up in rivers, coastal seas, beaches, salt, sugar, seafood and even bottled drinking water, and scientists are still working out what they mean for human health. They are born from the country’s enormous plastic waste stream and from everyday items such as clothes, car tyres and cosmetics, which means they are much harder to see, collect and control than the plastic bags and bottles that most people picture.

The subject has moved quickly from laboratory curiosity to public concern. Indian studies have now found microplastics along the Ganga, in estuaries and on beaches from Kerala to Odisha, and a 2024 investigation of common table salt and sugar made national headlines. Yet the science of health effects is unsettled, and India has no dedicated law that sets limits for microplastics in water or food. This explainer sets out what is known, what is uncertain and what is being done.

Key Takeaways

• Microplastics are plastic particles under five millimetres, and most of them in India come from larger plastic breaking down and from synthetic textiles rather than from deliberately tiny products.
• Studies have detected microplastics in the Ganga, in coastal waters, in sea fish and shellfish, and in everyday foods such as salt and sugar, so exposure is nearly universal.
• Scientists have found microplastics in human blood, lungs and placentas elsewhere, but whether the particles cause disease at normal levels remains uncertain.
• Synthetic clothes shed fibres in every wash, and tyres shed dust on every road, which makes these two sources particularly hard to control.
• India’s Plastic Waste Management Rules restrict some single-use plastics, yet there is no dedicated national limit for microplastics in drinking water, food or air.
• Reducing microplastics requires attacking the source, through less plastic use, better waste collection, wastewater treatment and filters on washing machines.

What are microplastics?

Microplastics are plastic particles less than five millimetres across, about the size of a sesame seed or smaller, and they are found wherever plastic waste and plastic products are used. Smaller particles below about a micrometre are often called nanoplastics, and they are even more difficult to detect.

The particles are not one substance. They are made of different polymers, such as polyethylene, polypropylene, polystyrene and polyester, and they may carry chemical additives, dyes and pollutants that cling to their surface. Their shapes range from tiny threads and flakes to beads and foam. Because plastic does not biodegrade in the usual sense, a fragment can break into ever smaller pieces but never truly disappears for decades or longer.

Scientists generally split microplastics into two categories. Primary microplastics are manufactured to be small, such as the plastic pellets called nurdles used as raw material for factories, or the microbeads once added to face scrubs and toothpaste. Secondary microplastics form when larger items such as bags, bottles, fishing nets and packaging break down under sunlight, heat, waves and abrasion.

Where do microplastics in India come from?

Microplastics in India come mainly from the breakdown of mismanaged plastic waste, the shedding of synthetic textiles, the wear of vehicle tyres and the leakage of industrial pellets and personal-care products. India generates millions of tonnes of plastic waste a year, and a significant share is not collected or recycled, which feeds the pool of future fragments.

• Degrading litter: bags, wrappers, bottles and sachets left on land or in drains weather into fragments, especially under the strong tropical sun.
• Synthetic textiles: polyester, nylon and acrylic clothes release tiny fibres when washed, and most household wastewater is released without removing them.
• Tyre and road dust: friction between tyres and roads wears off rubber and plastic particles that wash into drains in the monsoon.
• Microbeads and cosmetics: some scrubs, toothpastes and cleaning products have contained plastic beads that flow straight down the sink.
• Industrial pellets: plastic raw material spilt during transport and processing can reach rivers and the sea.
• Fishing gear and paints: worn nets, ropes and flaking marine paint add particles along coasts.
• Agriculture: plastic mulch films, irrigation pipes and sewage sludge used on fields leave fragments in soil.

Cities add to the load through open dumping and burning of waste, which leaves partly degraded plastic that is easily blown or washed away. Festivals that involve plastic decorations and immersion of materials in water add seasonal peaks at some river ghats.

Are there microplastics in the Ganga and other Indian rivers?

Yes, scientific studies have found microplastics in the Ganga along stretches from the upper reaches near Haridwar to the delta, and similar findings exist for the Yamuna and other rivers. Concentrations tend to be higher near cities, industrial areas and ghats, where untreated sewage and solid waste enter the water.

Rivers act as both carriers and stores of microplastics. They transport particles from inland cities toward the sea, and they deposit part of the load in sediments, floodplains and reservoirs. The Ganga, which supports hundreds of millions of people and drains a vast catchment, is a major potential pathway of plastic to the Bay of Bengal, though estimates of the exact quantity differ by study and method.

Researchers also point out that results are hard to compare. Different teams use different nets, filters and counting methods, and they report results in different units, so a headline number from one study cannot easily be set against another. What is consistent is the broad finding that microplastics are present almost wherever scientists look.

Do microplastics occur in Indian salt, seafood and drinking water?

Microplastics have been reported in Indian table salt, sugar, sea fish, shellfish and bottled water, as well as in tap water in some studies, which shows that they enter the food chain through several routes. These findings are generally of small particles in small quantities, and they should not be read as proof of harm.

Salt and sugar

A 2024 study by the Delhi-based research and advocacy group Toxics Link tested common Indian brands of salt and sugar and reported microplastics in every sample, mostly as fibres, films, pellets and fragments. Sea salt is expected to carry particles because it is made by evaporating seawater, and the study found them in other salts and in sugar as well, which suggests contamination can occur at several steps of production and packaging.

Seafood

Studies along the Indian coast have found microplastics in the guts of sardines, mackerel and other fish, and in mussels and oysters that filter seawater. Because shellfish are often eaten whole, they can deliver the particles directly to consumers, whereas in larger fish the gut is usually removed before cooking.

Water and air

Global surveys, including some with Indian brands, have reported microplastics in bottled water, and the World Health Organization reviewed the evidence in 2019, concluding that the available data did not suggest a health risk at the levels found but that knowledge was limited. Microplastic fibres also travel through the air and settle on soil and surfaces, so inhalation is another route of exposure.

What are the health effects of microplastics?

The health effects of microplastics are not yet clear: researchers have found the particles inside human blood, lungs, placentas and other tissues in several countries, but there is not yet reliable evidence showing that they cause specific diseases at the levels people are normally exposed to. This is an active and fast-moving field.

The concerns fall into three groups.

• Physical effects: particles might irritate tissue or cause inflammation, especially in the gut or lungs.
• Chemical effects: plastics contain additives such as plasticisers and flame retardants, some of which can disrupt hormones, and particles can absorb pollutants from the environment.
• Biological effects: particles can carry bacteria and other microbes on their surfaces.

Most of the evidence on harm comes from laboratory studies on cells and animals, often using doses higher than people normally meet. Some recent research has linked microplastics in arterial plaque to heart problems, but such associations do not prove that the particles are the cause. Honest summaries stress both points: exposure is certain and widespread, but the size of the risk is unknown. Many scientists therefore support a precautionary approach of reducing plastic exposure while research continues.

How do microplastics harm rivers, seas and wildlife?

Microplastics harm aquatic life when animals swallow them, mistaking them for food, and when the particles carry chemicals and microbes into the food web. Because they are small, they can be eaten by organisms from plankton and worms to fish and filter-feeding shellfish.

Ingested plastic can fill the stomach without providing nutrition, damage the gut and reduce feeding and growth. Studies on fish and invertebrates have shown effects on behaviour and reproduction in the laboratory. Sea turtles, seabirds and marine mammals are known to ingest larger plastics, and the smaller fragments move up the food chain as predators eat contaminated prey.

Microplastics also affect land. Plastic particles in farm soil can alter its structure and water retention, and they may affect earthworms and soil microbes. Fragments carried by wind and water reach even remote areas, including high Himalayan regions, according to several studies, which shows how widely the problem has spread.

What is India doing about microplastics?

India has addressed microplastics only indirectly through its plastic waste rules, with no dedicated national limit on microplastics in drinking water, food, air or products. The main tools are the Plastic Waste Management Rules of 2016 and their later amendments, which introduced extended producer responsibility and banned a list of identified single-use plastic items from July 2022.

These measures target the source of secondary microplastics by reducing plastic litter, but they were not designed to measure or limit the small particles themselves. Compliance with the single-use ban has also been uneven across states.

Several countries, including the United States and the United Kingdom, have banned microbeads in rinse-off cosmetics, and the European Union has restricted intentionally added microplastics. India has no comparable comprehensive law, although manufacturers and standards bodies have been under pressure to phase out microbeads. Research institutions, universities and government laboratories are building monitoring capacity, but standard methods for sampling and testing still need to be agreed so that results can be compared across the country.

How can microplastic pollution be reduced?

Microplastic pollution can be reduced by using less plastic, collecting and managing waste better, treating wastewater, and stopping fibres and tyre dust at the source. Cleaning up microplastics after they spread is extremely difficult, so prevention is far more effective.

Individuals can help in modest ways, such as choosing cotton, wool or linen clothing where practical, carrying a reusable bottle and bag, and avoiding scrubs containing plastic beads. Large gains, however, depend on system changes in how cities collect and treat waste.

Bottom Line

Microplastics are now a permanent feature of India’s environment, found from the Ganga to the table salt in kitchens. Whether they damage human health remains unproven, but their persistence and spread are reasons enough to act. The most reliable response is to cut plastic at the source and to build the monitoring and rules that India currently lacks.

Frequently Asked Questions

What are microplastics in simple terms?

Microplastics are tiny pieces of plastic, smaller than five millimetres, that come from broken-down waste or are made small on purpose. They include fibres from synthetic clothes, dust from tyres, pellets and cosmetic microbeads. They spread through water, soil, food and air and do not break down easily.

Are there microplastics in Indian salt and sugar?

Yes, a 2024 study by Toxics Link reported microplastics in all the common Indian salt and sugar samples it tested, mostly as fibres, fragments, films and pellets. The study measured small amounts, and it does not show that the products are harmful. It does show that contamination is widespread in the food supply.

Are microplastics dangerous to human health?

Microplastics may be harmful, but the evidence in humans is not yet conclusive. Particles have been detected in blood, lungs and placentas, and laboratory studies suggest possible inflammation and chemical effects. The WHO has said the available data do not show a clear risk at current levels and that more research is needed.

Do microplastics occur in the Ganga?

Yes, studies have found microplastics in the Ganga along stretches from the upper reaches to the delta, with higher levels near cities and industrial areas. The river carries particles toward the Bay of Bengal and stores some in its sediments. Exact quantities vary because studies use different sampling and counting methods.

Does India have a law on microplastics?

India has no dedicated national law or standard for microplastics. The Plastic Waste Management Rules, including the 2022 ban on certain single-use items, address plastic waste in general and so reduce the supply of future fragments. Specific limits for microplastics in water, food or cosmetics have not been set.

How can I reduce my exposure to microplastics?

You can lower your exposure by using fewer plastic products, avoiding heating food in plastic containers, filtering or washing synthetic clothes less often, and choosing products without plastic microbeads. Using natural-fibre clothing and a reusable bottle also helps. These steps reduce both exposure and the amount of plastic released into the environment.

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