While Arizona wrestles with the future of its water, state Attorney General Kris Mayes filed a lawsuit against dozens of companies — including manufacturing giant 3M and the defense contractor Raytheon — for producing products containing PFAS or forever chemicals, causing "widespread" groundwater pollution. Read more»

A federal judge in Montana partially sided with environmentalists, agreeing that the Forest Service violated the Clean Water Act by discharging aerially deployed fire retardant into waterways without a permit, but allowed the continued use of aerial retardants while obtaining a permit. Read more»

The Environmental Protection Agency proposed a new rule on Wednesday that would expand federal regulations of toxic coal ash after reaching a settlement with environmental and civil rights groups last month. Read more»

Air pollution in the Tucson metro area hit harmful levels on Wednesday, with high concentrations of ground-level ozone, prompting an advisory from Pima County that residents should avoid intense physical outdoor activity. Read more»

Tucson residents can dispose of hazardous waste and have documents shredded this Saturday free of charge during the city's May collection event. Read more»

Recent class-action lawsuits claim brands falsely advertise their products as environmentally sustainable or healthy while containing toxic levels of PFAS chemicals, and while the health risks of wearing clothing alleged to be toxic are unknown, the implications are wide-reaching. Read more»

The Pima County Department of Environmental Quality declared Tuesday a Dust Action Day for the Tucson metropolitan area, warning of harmful levels of air pollution due to high winds Monday night. Read more»

PFAS have been around since the 1940s, and more than 120 different compounds have been found in wildlife - with some 330 species were affected, spanning nearly every continent - now, scientists are working to determine how these chemicals affect wild animals’ health. Read more»

Democratic lawmakers headed by Arizona Representative Raúl Grijalva unveiled a sweeping new piece of legislation Wednesday, aimed at shielding vulnerable communities from the effects of pollution and climate change, as well as strengthening government outreach. Read more»

U.S. drinking water standards will for the first time include limits on the presence of cancer-causing substances known as PFAS, according to new regulations that will be overseen by the Environmental Protection Agency. Read more»

The Environmental Protection Agency has notified Salt River Project that it plans to deny the utility’s request to continue dumping coal ash into an unlined pond at its Coronado Generating Station coal-fired plant in eastern Arizona. Read more»

Dozens of legislatures are considering bills to crack down on the use of PFAS - “forever chemicals” that don’t break down naturally and are shown to cause myriad health issues - including legislation to strengthen product disclosure laws and increase liability for polluters. Read more»

For the third time in 10 years, the 9th Circuit took up the fight between the Center for Biological Diversity and the U.S. Forest Service for failing to regulate the disposal of lead bullets on public lands in northern Arizona. Read more»

The EPA denied the requests of six coal plants - including the Salt River Project’s Coronado Generating Station - to keep dumping toxic ash into unlined or inadequately lined pits, signaling the agency’s commitment to enforce the 2015 federal coal ash rules. Read more»

Significant changes are underway that have the potential to create a more sustainable world, and two key systems that drive the world’s economy – energy and finance – are starting to shift toward sustainability. Read more»