Water is essential for health, economic well-being and social equity, but too many people around the world still don't have access to clean drinking water and sanitation.
PFAS have been used in everything from coffee cups to frying pans. But they're toxic, and accumulating in the environment.
Dams built to hold enormous quantities of toxic mining waste have a long history of spills. Decisions in the Pacific Northwest threaten three free-flowing rivers there.
Floods will undoubtably wash pollutants into water reservoirs. Are we prepared enough to protect our drinking water?
Mayflies and stone flies are extremely vulnerable to water pollution, which has implications for the larger food chain.
The solids from wastewater plants are usually dumped into landfills because they are contaminated with heavy metals. Now there is a way to remove the metals so the waste can be used as fertilizer.
The Trump administration is supporting new mines in Alaska and Minnesota that many opponents say could devastate sensitive areas around them.
As climate change speeds up tropical storm cycles, rivers and bays have less time to process nutrients and pollutants that wash into them after each event.
We all know that climate change is hurting the Great Barrier Reef. But scores of other less-publicised threats also threaten the future of the natural wonder.
Should lakes, rivers and other resources have legal rights? New Zealand, Ecuador and other countries have taken this step. Now Toledo, Ohio is a US test case.
A proposed plan to clean up New Zealand's waterways draws clear limits on the expansion of dairy farming and irrigation, as well as on the use of nitrogen fertiliser in some key areas.
Many remote communities in Australia's north rely on bore water. But a new microbiology analysis suggests that the chemistry of untreated water can allow disease-causing bacteria to grow unchecked.
A grade of 92 is an A at most schools, but for tap water it means that millions of Americans drink water that fails to met federal standards.
Freshwater data in the latest report on the state of New Zealand's environment suggest improvements in water quality are possible but many gaps in understanding remain.
Scientists are finding ways to generate something useful from the pollution in our environment.
Gas mining is expanding across Australia, and has been touted as part of the answer to cutting emissions. But there is evidence that this rollout will pose significant health and environmental risks.
The 'used water' that flows from our showers, dishwashers and toilets isn't a waste to engineers – it contains valuable materials. The challenge is recovering them and turning them into products.
EPA is moving to regulate two chemicals from a group called PFAS that are contaminating drinking water. A public health expert explains why the agency should take much broader action.
Bankrupt oil and gas companies must clean up old wells, yet taxpayers are still stuck with the bill for abandoned mines.
Snorkeling off the California coast, a high school student found heaps of golf balls on the ocean floor. With a marine scientist, she showed that golf courses were producing tons of plastic pollution.