Denver’s got the most polluted zip code in the country? Not so fast.

Is 80216 really the most polluted zip in the U.S.?

I-70 opponents suffered a setback in court, but they’re not giving up

A federal judge declined to issue an injunction to stop the Platte to Park Hill flood control project over its connection to the I-70 widening.

Drivers in the Denver metro area produce just as much ozone as oil and gas production, according to an NCAR study

That means individual Denverites have the power to reduce ozone pollution by driving less, the authors of the study said.

With AC units and windows for 268 homes, CDOT asks neighbors to “pardon our dust”

CDOT and the city of Denver are setting aside $3.75 million for home upgrades as part of the mitigation for the I-70 expansion.

Rocky Flats cleanup is working, according to a federal review

A Department of Energy review found that precautions put in place after a 10-year cleanup are protecting people and the environment at Rocky Flats.

Denver’s growing pains — and drug problems — make their way into the South Platte

They're familiar Denver tensions — development, lack of affordable housing and rising drug use — and each has inevitably seeped into the river.

Air pollution violations could cost Denver oil and gas company $10,000 a day

The air pollution contributed to ozone pollution along the Colorado Front Range, according to a civil complaint. Ozone can lead to smog.

Each year, Denver street sweepers collect enough crud to fill Coors Field 9 feet deep

Street sweeping is about far more than petty fines. Denver's water and air quality depend on it.

Denver improves on ozone report card, but we’re still struggling

Traffic pollution: an invisible health risk for dozens of Denver schools

RiNo landowner’s daughter says developer turned pollution into a hardball legal tactic

Cooking oil waste kills 30 ducks and geese in a Lakewood retention pond

Report: Nation’s most environmentally impacted urban area includes Globeville, Elyria-Swansea, RiNo

In Rocky Mountain National Park’s high lakes, scientists find traces of Colorado’s Gold Rush and the Great Depression

Pollution from across the Front Range drifts up to Rocky Mountain. USGS field ecologist Jill Baron can see it in her long-running study of Loch Vale.

CDOT did a new air quality analysis for the I-70 project, and opponents have serious questions about the numbers

Denver’s on ozone alert today, so maybe take it easy

Colorado has cleared a backlog of thousands of untested rape kits

Investigators could be closer to solving hundreds of Colorado sex assault cases.

There were 172 murders in Colorado last year, 15 percent more than 2014

The Colorado Bureau of Investigation bases its annual report on statistics from 245 law enforcement agencies. It doesn't seek to answer "why."

Colorado’s industrial era left some great buildings – and a ton of dangerous pollutants