Blooms of algae, like this growth in 2015 in Lake St. Clair between Michigan and Ontario, promote the formation of dead zones.
NASA Earth Observatory
Scientists have mapped a huge dead zone in the Gulf of Oman, without enough oxygen in the water to support life. This Speed Read explains why dead zones form in waters around the world.
Toppled road sign for a closed water distribution center in Flint, Mich.
Michigan officials have ended distribution of free bottled water in Flint, but many residents believe the city's water crisis is not over and have lost all trust in government.
Long-eared Myotis bat (
Myotis septentrionalis), photographed in Arizona.
Scientists often use animals and plants as indicators to assess whether ecosystems are polluted. Tracking bats, which cover wide areas and need clean water, could become a way to find potable water.
Little Missouri River, North Dakota.
Recent research shows that US rivers are becoming saltier and more alkaline. Salt pollution threatens drinking water supplies and freshwater ecosystems, but there is no broad system for regulating it.
There are nanometals in your washing machine.
Many socks, towels and other textiles are treated with silver nanoparticles to kill germs and odors. When the silver washes out, it can pollute waterways. Two chemists propose a way to collect it from wastewater.
Healthy aquatic vegetation in the Chesapeake Bay.
Cassie Gurbisz/University of Maryland Center for Environmental Science
An ambitious plan to cut the flow of nutrients into the Chesapeake Bay has produced historic regrowth of underwater seagrasses. These results offer hope for other polluted water bodies.
Microscopic algae smothering seagrass leaves.
The 'canaries of the sea' are sending a worrying message about the health of our oceans.
Skimming oil in the Gulf of Mexico during the Deepwater Horizon spill, May 29, 2010.
A scientist who served on a national commission to review the 2010 BP oil spill explains why Trump administration efforts to loosen offshore drilling regulation pose major risks for minor payoffs.
Think of what your clothes are doing to the planet.
Joe Giddens/PA Archive
Water pollution, toxic chemical use and textile waste: fast fashion comes at a huge cost to the environment.
“Remember, remember the fifth of November”…
A chemical found in products as diverse as fireworks and food packaging, perchlorate can interfere with thyroid function as well as foetal brain development.
Aerial view of San Jose, California, 2016.
Silicon Valley brought together natural surroundings, suburban homes and futuristic high-tech work. But industrial pollution betrayed the California dream.
More intense rainfalls have caused flooding throughout New Zealand, as seen here in Northland.
A new report highlights direct and indirect impacts of climate change on physical and mental health.
Big Sur coastline.
Ashley Spratt, USFWS
For 50 years California has used laws and policies to manage development along its 1,100-mile coastline and preserve public access to the shore. Climate change will make that task harder.
A woman takes an oral cholera vaccine in a hospital. But cholera vaccines are not always effective and never long lasting.
REUTERS/Andres Martinez Casares
Many states in Nigeria are reeling from cholera outbreaks. They need better health and sanitation infrastructure to disrupt transmission of the bacteria which cause the disease.
Tailgating can be fun, but watch what goes into your drink.
Monkey Business Images/www.shutterstock.com
Bacteria are everywhere, even on your drink garnishes and ice. While most are not going to harm you, some can make you very sick. Here are some things to consider at public drink stations.
Research suggests much drinking water contains plastic microparticles.
Sun cream ingredients have been linked to hormonal changes in fish and coral bleaching.
As many people have had to wade through floodwaters, they need to be aware of the risk of infection and disease from contaminated waters.
AP Photo/David J. Phillip
As Houston continues to rescue residents whose homes were ruined, it also begins to deal with issues related to contaminated floodwaters and overflowing reservoirs. It won't be easy.
Plastic trash on San Francisco’s Ocean Beach.
A new study shows that anchovies – key food for larger fish – are attracted to plastic trash because it smells like food. This suggests that toxic substances in plastic could move up through food chains.
Six million people in Pennsylvania and neighboring states get their drinking water from the Susquehanna River. Major pollution sources include agriculture, urban development and industry.
Nicholas A. Tonelli
America's drinking water infrastructure is aging and needs billions of dollars in upgrades. Two extension educators urge consumers to monitor their water and have it tested if they suspect problems.