India is home to a wide variety of lakes, including the desert lakes of Rajasthan, the coastal backwaters of Kerala, and the chilly alpine lakes of Ladakh. Some are even created by impacts from meteorites. These lakes are more than simply lovely tourist destinations. They sustain wildlife, help locals make a living, safeguard the environment, and are crucial to its upkeep.

Lake Name	State/UT	Origin	Type	Key Ecological Facts
Chilika Lake	Odisha	Tectonic subsidence & marine transgression	Brackish coastal lagoon	The largest coastal lagoon in Asia and the second largest in the world. Declared a Ramsar Wetland of International Importance in 1981. Home to the Irrawaddy dolphin and over 160 migratory bird species. Supports 0.2 million fisherfolk.
Dal Lake	Jammu & Kashmir	Glacial origin, formed by tectonic activity in the Kashmir Valley	Freshwater highland lake	Called the 'Jewel in the Crown of Kashmir.' Covers ~18 sq km. Supports unique floating gardens called 'Rad' and iconic houseboats. Critically threatened by siltation and encroachment.
Loktak Lake	Manipur	Tectonic depression, fed by Manipur River tributaries	Freshwater lake with floating phumdi islands	The largest freshwater lake in Northeast India. Famous for circular floating biomass islands (phumdis). The only floating national park in the world, Keibul Lamjao, floats here, sheltering the endangered Sangai deer.
Wular Lake	Jammu & Kashmir	Tectonic depression in the floodplain of the Jhelum River	Freshwater floodplain lake	One of the largest freshwater lakes in Asia (~189 sq km at peak). Critically important for flood regulation in Kashmir. Ramsar-listed. Severely threatened by water hyacinth invasion and siltation.
Kolleru Lake	Andhra Pradesh	Natural floodplain depression between the Krishna and Godavari delta systems	Freshwater shallow lake	One of the largest freshwater lakes in India (~900 sq km). Ramsar-listed. Major breeding ground for painted storks and pelicans. Faces severe encroachment from aquaculture farms.
Pangong Tso	Ladakh	Tectonic rifting; glacially fed endorheic basin	Saline high-altitude lake	Sits at 4,350 m altitude, stretching 134 km across India and China. Water changes colour from blue to green to red. Only the Indian portion (about 40%) is within Indian territory. Recently popularised by Bollywood.
Tsomoriri (Tso Moriri)	Ladakh	Tectonic-glacial origin in the Rupshu plateau	High-altitude endorheic saline lake	Ramsar-listed. The highest designated Ramsar wetland in the world (~4,522 m). Breeding ground for the endangered Black-necked crane and bar-headed goose. Critical habitat in the trans-Himalayan biome.
Lonar Lake	Maharashtra	Meteorite impact ~52,000 years ago	Saline-alkaline crater lake	One of only four hyper-velocity meteorite impact craters in basaltic rock globally. Declared a National Geo-Heritage Monument. The water is simultaneously saline and alkaline, extremely rare. Home to unique microbial mats and halophilic bacteria.
Vembanad Lake	Kerala	Marine transgression and longshore drift form a backwater system	Freshwater-to-brackish backwater lake	Longest lake in India (~96 km). Part of the Kuttanad region, the only place in India where farming is done 1.2–3 m below sea level. Ramsar-listed. Famous for the annual Nehru Trophy Boat Race.
Pushkar Lake	Rajasthan	Volcanic or meteor impact origin (disputed); fed by underground springs	Freshwater sacred lake	One of the few natural lakes in Rajasthan. Surrounded by 52 ghats and over 400 temples. Considered sacred in Hinduism. Hosts the annual Pushkar Camel Fair, one of the largest in the world. Critically threatened by pilgrimage pollution.
Sambhar Salt Lake	Rajasthan	Playa Lake formed in a tectonic depression, receiving saline underground water	Saline playa lake	Largest inland salt lake in India (~190–230 sq km). Produces ~196,000 tonnes of salt annually. Ramsar-listed. Major flamingo aggregation site. The only site in India where the Migratory flamingo breeds irregularly.
Bhitarkanika (Chilika adjacent)	Odisha	River delta mangrove wetland associated with the Brahmani and Baitarani rivers	Brackish mangrove wetland	While technically a mangrove ecosystem, its associated water bodies are ecologically critical. The second-largest mangrove ecosystem in India. Ramsar-listed. Key habitat for saltwater crocodiles and Olive Ridley sea turtles.

Why These Lakes Matter

Millions of fish, birds, and endangered creatures can be found in India's lakes. They are crucial for both people and the ecosystem because they support fishing villages, store carbon, replenish groundwater, and naturally lessen floods. Eleven of these lakes are designated as Ramsar Wetlands of International Importance, a recognition that places an obligation on India to conserve them under international environmental law.

Despite their ecological significance, most of India's important lakes face severe anthropogenic pressures, including encroachment for agriculture and aquaculture, pollution from urban and industrial runoff, invasive species (particularly water hyacinth), over-extraction of water, and siltation from catchment deforestation.

Fun Facts

Lonar Lake in Maharashtra is one of only four hypervelocity meteorite impact craters in basaltic rock in the entire world.
Loktak Lake's floating 'phumdi' islands are large enough to support human settlements, wildlife sanctuaries, and agriculture simultaneously.
Vembanad Lake is so long (96 km) that it spans three districts of Kerala and forms the backdrop for the famous Nehru Trophy Boat Race.
Tsomoriri (Tso Moriri) is the world's highest Ramsar-designated wetland at over 4,500 metres above sea level.
Sambhar Salt Lake has been producing salt for over a thousand years and is mentioned in ancient Hindu texts as the abode of the goddess Shakambhari.
Chilika Lake's Irrawaddy dolphins are a critically endangered sub-population found nowhere else in such proximity to human habitation.

Frequently Asked Questions about Ecologically Important Lakes of India

1. How many lakes in India are designated as Ramsar Wetlands?

India has the most Ramsar Sites in South Asia, with 75 as of 2024. Due to their ecological significance, lakes like Chilika, Wular, Loktak, Vembanad, Sambhar, and Tso Moriri are protected on a global scale.

2. What is the biggest threat to India's lake ecosystems?

India's lakes are impacted by a number of problems, including pollution, illegal development, water hyacinth growth, silt buildup, excessive water use, and climate change. These issues damage lake ecosystems and put plants, animals, and birds in peril.

3. What makes Lonar Lake scientifically unique?

About 52,000 years ago, a meteorite impact created Lonar Lake. It is one of the most remarkable crater lakes in the world because of its uncommon salty and alkaline water, which supports strange microorganisms.