Cleaning up Mount Everest involves a patchwork of government mandates, community-run waste programs, nonprofit expeditions, and evolving regulations on both the Nepali and Chinese sides of the mountain. The problem is enormous: decades of mountaineering have left behind an estimated tens of thousands of kilograms of discarded gear, empty oxygen bottles, human waste, and even bodies. But real progress is happening, driven by a combination of financial incentives for climbers, annual large-scale cleanups, and growing scientific pressure as researchers document what the pollution is doing to the mountain’s glaciers and the drinking water of communities downstream.
Why the Mountain Became a Dumping Ground
Everest has been climbed commercially since the early 1990s, and for most of that history there was no serious system for managing waste. Above base camp, conditions make hauling trash extraordinarily difficult. Oxygen is scarce, temperatures can plunge well below minus 30 degrees Celsius, and every extra kilogram a climber carries is a meaningful drain on energy and safety margins. For decades, the rational calculation for most expeditions was to leave spent oxygen cylinders, torn tents, broken ropes, food packaging, and human waste behind. The higher camps, particularly Camp IV in the so-called “death zone” above 8,000 meters, accumulated the most debris because that is where climbers are least capable of carrying anything they don’t absolutely need.
The mountain’s glaciers compounded the issue by swallowing waste and hiding it for years. As glaciers have thinned and retreated due to warming temperatures, buried refuse and even human waste from previous decades has been surfacing, creating hazards that didn’t exist when the trash was first left behind.
Nepal’s Deposit and Carry-Out Rules
Nepal’s government has tried several regulatory approaches to stem the flow of garbage. In 2014, Nepal introduced a rule requiring each climber to bring back at least eight kilograms of waste from above base camp, in addition to their own body weight in gear. A refundable deposit of $4,000 per climber was established: you get your deposit back when you return with your waste, and you forfeit it if you come down empty-handed. The intent was straightforward: make leaving trash on the mountain financially painful.
Enforcement has been the persistent weakness. Verifying what a climber brought up versus what they brought down at 5,300 meters of base camp, let alone at the higher camps, is logistically challenging. Critics have pointed out that some climbers simply collected others’ abandoned trash near base camp to satisfy the weight requirement, rather than hauling waste down from the upper mountain. Nepal has periodically revised the rules, including raising permit fees and adding environmental briefings for expeditions, but the sheer number of climbers on the mountain each season, often exceeding 400 on the Nepali side alone during the spring window, makes individual accountability difficult.
On the Chinese (north) side, authorities have taken a more blunt approach. China temporarily closed the north-side base camp to tourists in 2019, allowing only permitted climbers beyond a certain point, and implemented its own carry-out requirements. China has also organized government-funded cleanup teams that operate on the Tibetan side of the mountain. The north side sees fewer climbers overall, which makes both the pollution problem and its management somewhat more contained.
Community Organizations and Annual Cleanups
Much of the ground-level work on the Nepali side falls to the Sagarmatha Pollution Control Committee, known as the SPCC, a local nonprofit that has been operating in the Everest region since the early 1990s. The SPCC and its partners have installed roughly 70 waste collection bins throughout Sagarmatha National Park, banned the importation of glass beer bottles into the park, organized annual cleanups at Everest base camp and the base camps of surrounding trekking peaks, and run composting workshops for villages in the region.1Mountain Research and Development. A Sustainable Solid Waste Management Plan for Sagarmatha (Mt Everest) National Park and Buffer Zone, Nepal They also work closely with Sagarmatha Next, a nonprofit focused on sustainable tourism within the park and its buffer zone.
These community-driven efforts are significant because the SPCC is embedded in the region in a way the national government in Kathmandu is not. SPCC workers and Sherpa guides live in the communities most directly affected by Everest tourism. They see the waste problems year-round, not just during the climbing season, and they have relationships with the lodge owners, teahouse operators, and porters whose livelihoods depend on the trekking and climbing economy. That local investment gives SPCC programs a level of follow-through that top-down regulations from Kathmandu often lack.
Beyond the SPCC, several internationally funded cleanup campaigns have hauled large quantities of waste off the mountain. Nepal’s government partnered with the army in a major 2019 cleanup that reportedly removed over 10,000 kilograms of trash and several bodies from the mountain’s slopes. Similar campaigns have been organized by NGOs including the Eco Everest Expedition, which has been running annual cleanup climbs since 2008, and the Bally Peak Outlook Foundation, which has funded waste removal from Everest and other high-altitude peaks. These campaigns use dedicated climbing teams whose sole purpose is waste retrieval, sometimes employing helicopters to sling-load heavy debris from the upper mountain.
The Human Waste Problem
Of all the pollution issues on Everest, human waste may be the most urgent and the hardest to solve. Hundreds of climbers and their support teams spend weeks on the mountain each season, and for most of Everest’s climbing history, the standard practice was to deposit human waste into crevasses or leave it in the open. At high altitude, waste doesn’t decompose in any meaningful timeframe: the cold preserves it almost indefinitely. As glaciers melt, buried fecal matter from decades of climbing is now appearing on the surface and entering glacial meltwater.
This poses a direct health risk. Pathogenic bacteria preserved in glacial ice can become active again as the ice melts, and the meltwater feeds streams and springs used by communities in the Khumbu Valley and beyond.2Cell Press / One Earth. Hazards on Mount Everest: A Primer – Section: Water Pollution Risks Some cleanup campaigns now include carrying human waste off the mountain in sealed containers, and Nepal has experimented with requiring climbers to use portable waste bags, similar to the “pack it out” systems used in some national parks. But compliance is uneven, and the accumulated waste from prior decades remains embedded in the glaciers, slowly emerging as temperatures rise.
At Everest Base Camp, the situation is somewhat more manageable. Expeditions typically use barrel-style latrines, and waste is carried out by porters to designated disposal areas lower in the valley. The challenge intensifies at the higher camps, where no infrastructure exists and every ounce of weight matters.
Contamination Reaching Downstream Communities
The waste problem on Everest is not just an aesthetic or mountaineering concern. It is a public health issue for people who live far below the summit. Research on drinking water sources in Sagarmatha National Park found significant fecal contamination, with human activity from both local residents and tourists identified as the main cause. Surface water contamination of the shallow springs that communities rely on for drinking water leads to increasing fecal bacteria levels at lower elevations.3Mountain Research and Development. An Assessment of Drinking Water Sources in Sagarmatha National Park (Mt Everest Region), Nepal – Section: Results and discussion
The Himalayan mountains serve as the main headwaters for river systems that supply freshwater to over a billion people, including the Ganges, Yangtze, and Indus rivers.3Mountain Research and Development. An Assessment of Drinking Water Sources in Sagarmatha National Park (Mt Everest Region), Nepal – Section: Results and discussion While the contamination from Everest specifically is a small fraction of the overall pollution load on these massive river systems, the local impact on Khumbu Valley communities is acute. Villages that depend on glacial meltwater and spring-fed sources are drinking water that has passed through or over terrain contaminated by decades of climbing activity. This gives cleanup efforts a public health urgency that goes well beyond keeping the mountain picturesque.
Climate change amplifies the problem by accelerating glacier melt. The confluence of geological, hydrological, chemical, and microbial hazards grows as more ice disappears, increasing the risk of landslides, water pollution, and waste contamination simultaneously.4PubMed Central. A Perspective of the Cumulative Risks from Climate Change on Mt. Everest: Findings from the 2019 Expedition Cleanup efforts are, in a sense, racing against the melt: the faster the glaciers thin, the faster decades of buried waste comes to the surface and enters the water system.
Microplastics on the Roof of the World
Trash you can see and pick up is only part of the story. Recent research has documented microplastics and nanoplastics on Everest, even in snow samples collected at research stations near the mountain. Snow sampled at Qomolangma Station contained microplastics at a mean concentration of about 95 items per liter, with the vast majority of particles smaller than 20 micrometers, meaning they are invisible to the naked eye.5Cell Reports Sustainability. Microplastics and nanoplastics on Mt. Everest – Section: Results The detected particles were mostly fragments in black, transparent, and yellow colors, consistent with the breakdown of synthetic climbing gear, tent materials, food packaging, and clothing fibers.
This finding complicates the cleanup picture considerably. You can organize a team to haul old oxygen bottles off a mountain. You cannot organize a team to remove particles smaller than the width of a human hair from snow and ice. Microplastic contamination on Everest is partly a product of on-mountain activity, as synthetic materials shed fibers and degrade in harsh UV and wind conditions, and partly a result of atmospheric deposition carrying particles from distant sources. Snow acts as a natural filter for airborne particles, trapping microplastics carried by wind from lower-altitude regions.5Cell Reports Sustainability. Microplastics and nanoplastics on Mt. Everest – Section: Results
No current cleanup campaign addresses microplastics specifically, and it is unclear what practical intervention could. Reducing the volume of synthetic waste left on the mountain and encouraging the use of more durable, less fragmentary materials could slow the rate of new microplastic generation at the source, but the particles already embedded in snow and ice will remain there until the ice melts, at which point they enter the watershed.
The Challenge of Removing Bodies
More than 300 people have died on Everest since climbing began in the 1920s, and many of their bodies remain on the mountain. At extreme altitude, recovery is dangerous and expensive. A body frozen into ice or resting on an exposed ridge above 8,000 meters can weigh well over 100 kilograms when encased in climbing gear and frozen solid. Moving that weight in the death zone, where supplemental oxygen is necessary and physical capacity is reduced to a fraction of what it is at sea level, requires a team of experienced high-altitude workers and can cost $30,000 to $80,000 or more per recovery.
Nepal has periodically organized recovery operations, and some families have privately funded the retrieval of loved ones’ remains. But the majority of bodies stay where they fell, some becoming macabre landmarks known to climbers by nickname. The bodies are not just an ethical issue; they are part of the broader waste and contamination problem, particularly as melting ice exposes remains that had been entombed for years or decades. Nepal announced a policy in 2024 to step up body recovery efforts, but the logistics remain formidable, and no single climbing season can address the backlog.
Technology and Newer Approaches
Some of the more promising developments in Everest cleanup involve technology and infrastructure rather than just more hands on the mountain. Helicopter sling-loading has become a standard tool for major cleanup operations, allowing heavy debris like collapsed tents, broken ladders, and large metal objects to be removed from camps that would otherwise require dozens of porter-loads. Drones have been tested for surveying waste accumulation at higher elevations, giving cleanup planners a better picture of where the worst deposits are before committing teams to dangerous retrieval work.
On the waste-processing side, the Khumbu Valley has seen investment in waste segregation and recycling infrastructure. Some of the trash brought down from the mountain, particularly aluminum cans and certain plastics, can be recycled if it reaches processing facilities in Kathmandu or other cities. The logistical chain is the bottleneck: waste has to travel by porter or yak from base camp to the nearest airstrip or road, and then by vehicle to a recycling facility. Organizations like Sagarmatha Next have focused on closing gaps in that chain so waste doesn’t simply accumulate in open dumps in the valleys below the mountain.
Biodigester toilets have been piloted at Everest Base Camp to convert human waste into usable biogas rather than relying on barrel transport alone. These systems work by enclosing waste in sealed containers where bacterial digestion produces methane for cooking fuel and a safer residue for disposal. High-altitude cold slows the bacterial process, so the technology is still being adapted for conditions above 5,000 meters, but it represents a shift from “carry it out” to “process it on site.”
How Much Has Actually Been Removed
Quantifying the total impact of cleanup campaigns is difficult because no single organization tracks all removal efforts across both sides of the mountain. Nepal’s government-backed 2019 campaign reported removing over 10,000 kilograms of waste. The Eco Everest Expedition has collectively removed tens of thousands of kilograms over its years of operation. Chinese authorities have reported similar figures from the north side. But estimates of total accumulated waste on the mountain range widely, and new waste arrives every climbing season. By some accounts, each climber generates an average of eight kilograms of waste above base camp per expedition, and with several hundred climbers each spring season on the Nepali side alone, the annual input is substantial.
The honest assessment is that cleanup campaigns have made visible progress, particularly at base camp and the lower camps, but the upper mountain remains heavily littered, and the microplastic and human-waste contamination issues are not solvable through trash-hauling alone. The mountain is cleaner than it was a decade ago, but it is far from clean, and the accelerating loss of glacier ice is revealing contamination faster than it can be addressed.
What Individual Climbers and Trekkers Can Do
If you are planning a trek to Everest Base Camp or a climb on the mountain itself, the most direct contribution you can make is choosing an expedition operator with a documented waste-management plan. Some operators go well beyond the minimum government requirements, employing dedicated waste managers on their teams, using portable human-waste containers at every camp, and committing to carry out more weight than they carry in. Others do the bare minimum or rely on Sherpa staff to quietly handle waste out of sight.
Trekkers below base camp have an impact too. The trail to base camp passes through Sagarmatha National Park, and hundreds of thousands of trekkers walk it each year, far outnumbering the climbers. Carrying reusable water containers, minimizing single-use plastic packaging, and using the SPCC’s waste bins rather than leaving trash at teahouses all reduce the cumulative load on the park’s waste system. The park charges an entry fee that partially funds waste management, so paying the fee rather than trying to avoid it is itself a small act of support for the cleanup infrastructure.