Oil from a nearby fuel container leaked through the water system in the lake most likely due to heavy rains of the past month. Cleanup efforts were ongoing this week. It’s not clear when the park will reopen.

Smoke from Canadian wildfires will make breathing outdoors difficult today for millions of people across the six largest provinces and into the United States.

The Washington Department of Fish & Wildlife said the fish are yellow perch, which are common in the lake.

Experts say Thursday's flight wasn't supposed to have gone off without a hitch, and still offers SpaceX valuable data. A space industry analyst explains why it was so significant.

Suncor has reported six million litres of water that exceed sediment guidelines have been released into the Athabasca River from a pond at its Fort Hills oilsands mine.

Anchorage-based photographer saw something wild — a sudden, bright light on the northern horizon that quickly started to take on a spiral shape as it drew nearer. The spiral “appears to be rocket engine exhaust from a SpaceX Transporter-7 mission that launched on the Falcon 9 about three hours earlier in California.”

About a year ago, the Alaska Department of Environmental Conservation tested Cold Bay’s water wells for PFAS, and the results came back well above the levels recommended for human consumption. Cold Bay closed the wells for drinking when the test results came back, and the Eastern Aleutian community has relied on state-provided bottled water ever since.

A previously underestimated risk lurks in the frozen soil of the Arctic. When the ground thaws and becomes unstable in response to climate change, it can lead to the collapse of industrial infrastructure, and in turn to the increased release of pollutants. Moreover, contaminations already present will be able to more easily spread throughout ecosystems. According to new findings, there are at least 13,000 to 20,000 contaminated sites in the Arctic that could pose a serious risk in the future.

As engineers and government officials try to locate the source of a sewage leak into the Capilano River, the Squamish Nation and a group of volunteers who monitor waterways on the North Shore say they are worried about the effect on young salmon in the river.