U.S. Environmental Protection Agency

The Latest: EPA cuts pollution at the Navajo Generating Station
The Latest: EPA cuts pollution at the Navajo Generating Station
75 percent less haze predicted for nearby parks.
Idaho’s sewer system is the Snake River
Idaho’s sewer system is the Snake River
As Big Ag flourishes, this massive waterway suffers.
Is Canada's massive mine waste spill a sign of things to come?
A historic moment for the Clean Air Act
A historic moment for the Clean Air Act
How it arrived and how much it matters for the climate.
Is coal dead?
Is coal dead?
Which plants are slated for closure or switches to natural gas.
River of no return
River of no return
Seattle’s Duwamish has been straightened, dredged and heavily polluted. Can a Superfund cleanup bring it back to life?
Duwamish sludge, from source to sink
Duwamish sludge, from source to sink
A close look at ‘Seattle’s toilet’
Which tributaries should be protected like the rivers they feed?
Which tributaries should be protected like the rivers they feed?
New rules may help regulators enforce an ambiguous law.
The West's crucial 2014 U.S. Senate races
A new era of clean air regulation is dawning
The Latest: New EPA rules for diesel in fracking
The Latest: New EPA rules for diesel in fracking
Now companies need a permit to use the controversial ingredient.
Discovery: Good ol' tallgrass was formed by good ol' bacteria