Can Astronauts Safely Drink Moon Water? The Quest for Purity

The Moon is experiencing a resurgence in popularity, with astronauts gearing up not only to return but also to potentially spend extended periods on its surface. However, many preparations are required for this ambitious endeavor, and one critical aspect is the question of whether Moon water is safe to drink. Can astronauts consume lunar water without risking their health?

At first glance, one might be tempted to provide a simplistic yet scientifically inaccurate answer—water is water, right? But, as you might expect, reality is far more complex. With the discovery of a substantial water reservoir at the Moon’s South Pole, the need to render it potable has become a pressing concern. Unfortunately, astronauts cannot simply take a sip of “moon water.” Let’s delve into the intricacies of this challenge.

astronauts moon

Beyond Ordinary Water

The primary challenge arises from the fact that lunar water possesses a unique composition distinct from the water we typically encounter on Earth. While it is still H2O, it contains additional elements that render its consumption unsafe. A significant revelation came from the LCROSS spacecraft mission in 2009, which disclosed that lunar water comprises hydrogen, magnesium, calcium, carbon monoxide, and mercury. It is the presence of carbon monoxide and mercury that poses the greatest risks, making “moon water” unfit for immediate consumption.

Filtering the Lunar Quandary

Calcium and magnesium, while present in lunar water, do not pose substantial risks. These elements are commonly found in drinking water worldwide and are considered safe. The real challenge lies in finding an effective filtration method to eliminate the hazardous elements from lunar water. Space agencies are actively seeking innovative solutions, and they’re turning to the public for assistance.

A campaign to collect ideas and solutions has been initiated, though participation is limited to residents of Canada and the United Kingdom, as these nations’ space agencies lead the effort. Nevertheless, individuals worldwide are encouraged to devise and share potential solutions through their own networks.

Seeking a Multifaceted Solution

However, devising a viable solution is no simple task. The lunar water purification challenge extends beyond filtering out hazardous elements. It encompasses the removal of ammonia, ethylene, carbon monoxide, methanol, hydrogen sulfide, sulfur dioxide, methane, and even lunar surface soil residues. The chosen solution must also account for the Moon’s reduced gravity, approximately one-sixth that of Earth, and the corrosive nature of lunar soil.

Moreover, the proposed equipment or machinery must be compact and compatible with space missions, given the limitations of available cargo space. The ideal solution should tackle these multifaceted challenges comprehensively.

A Patient Await for Lunar Sips

While the deadline for idea submissions concludes in April of this year, the announcement of contest results is not expected until 2026. Nevertheless, it is anticipated that space agencies will begin collaborating on these ideas well in advance. After all, moon missions are on the horizon for this decade, and the day may soon arrive when astronauts can safely drink lunar water thanks to an innovative filtration system.

Beyond that, we may envision a future where private companies extract water from the Moon to sell bottled lunar water to Earth’s elite, turning a celestial resource into a commodity of astronomical value—a scenario worthy of a space-age television series.