Denmark's vision for solving the world's water woes

For years, campaigns to clean Nepal's polluted Bagmati River resulted in failure. Now with police and government backing, the organization Safai Abhiyaan is in its third year, attracting hundreds of volunteers who are willing to brave the polluted waters to collect trash. The program's unique approach to organizing community volunteers has been a success, but the problem will not subside until greater perceptions about litter and water pollution are tackled.

Indonesian villagers were experiencing water shortages as natural springs started to dry up in part due to climate change, so they installed infiltration wells to collect and absorb rainwater. Not everyone, at first, wanted to implement the wells on their property, but by 2020, there were 320 infiltration wells in Patemon village. This water conservation project is not being implemented throughout the rest of the country.

Haunted by a 1962 drought in the town of Westminster, Colorado, the city's planners now incorporate water data in their planning processes to ensure that they never face the same sourcing issues again. By breaking down the silos between its water management and planning departments, the town has figured out how to manage its finite water resources, even in the face of a ballooning population. Now, other towns are following suit.

Thanks to years of government intervention, the city of Copenhagen has almost perfectly clean water — even better than bottled water. Denmark utilizes overflow barriers, underground water storage, and rerouted wastewater to keep their public water sources clean. Public awareness and a water tax also contribute to the city's success so that residents conserve and value their water (using only 26 gallons a day as opposed to the 80-100 gallons that Americans use).

Lack of access to sanitary bathrooms in the village of Kivalina, Alaska led to the implementation of a novel, home-based water sanitation system, currently being tested for effectiveness. The hope is that it proves to be a solution for areas all over the state with lack of access to clean water systems.

Upcycling spent barley helps to ease wastewater treatment. In Havre, Montana, the town’s wastewater treatment plant uses barley from a local brewery, Triple Dog Brewing, to feed bacteria. The nutrients from the barley give the bacteria a boost, helping to reduce nitrogen and phosphorous levels in the water. The collaboration means that Havre can save on expensive solutions and upgrades to its wastewater treatment plant.

As climate change alters environments across the United States, it has become increasingly important to manage watersheds as a preventative measure to wildfires. Amid responses across the country, one private-public partnership, the Rio Grande Water Fund, is leading the way, demonstrating enough success that the model has become federal policy. The Fund brings together government agencies, NGOs, businesses, and residents to fund watershed restoration which, in turn, creates jobs and build more resilient ecosystems.

In response to the growing concern about the world's water supply, a movement known in the United States as "One Water" has taken shape and is gathering momentum on a mission to halt floods, droughts and water pollution.

Scientists and activists in India are training citizens to collect information on water issues like contamination — and upload it so it can be used to push for change.

Dams make for complex and often controversial infrastructure. While hydropower generated from large dam projects is currently providing the bulk of the planet's renewable energy, dams can also cause major environmental and social damage by interrupting animal migrations, displacing indigenous communities, and collecting toxins. A number of solutions are being implemented, however, to address the various issues caused by dams, to help make them a more eco-friendly and viable source of clean energy.