Microplastic Assessment in Remote and High Mountain Lakes of Gilgit Baltistan, Pakistan

Microplastic Contamination in High-Altitude Andean Lakes: Sources, Distribution, and Environmental Implications

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Researchers sampled five high-altitude Ecuadorian Andean lakes at 3,848–4,245 meters elevation and detected microplastics in both water and sediments, with polyethylene and polypropylene as the dominant polymers and atmospheric transport from the Amazon Basin identified as a likely contamination pathway. The presence of microplastics in such remote alpine systems confirms that no environment is truly isolated from plastic pollution, with implications for pristine water sources and high-altitude biodiversity.

Microplastic characteristics in rivers and lakes across the Tibetan Plateau

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A systematic survey of rivers and lakes across the Tibetan Plateau found microplastics averaging 4,250 items/m³ in water and 3,750 items/kg in sediments, with small transparent polyamide, PET, and polypropylene fragments dominating near urban outfalls. These findings reveal that even remote, high-altitude ecosystems considered biodiversity refuges are now pervasively contaminated, underscoring the global reach of microplastic pollution.

Microplastic Pollution in Wular Lake, Kashmir-India (Ramsar Site): First Report and Associated Risk Assessments

Occurrence Characteristics and Ecological Risk Assessment of Microplastics in the Water Body of Lake Gahai, Tibetan Plateau of China

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Researchers characterized microplastic pollution in Lake Gahai on the Tibetan Plateau — a remote, high-altitude freshwater system — documenting the occurrence, distribution, and ecological risk of particles in an understudied region where sources and transport pathways remain poorly constrained.

Exploratory Study of Microplastics in the Eastern Himalayas of Nepal

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Researchers found preliminary evidence of microplastics smaller than 250 micrometers in surface water samples from a remote river in Sagarmatha National Park, Nepal, suggesting that plastic pollution has reached even the high-altitude Himalayan wilderness and that more detailed studies are needed to establish baseline contamination levels.