The new law reflects increasing fears about public safety as the booming Wattenberg oil and gas field overlaps with fast-growing communities north and east of Denver.
Companies are required to install pollution control devices in that 90-day timeframe, but state inspectors don’t follow up unless there is a complaint.
The EPA and National Park Service found harmful nitrogen pollution was 38 percent higher than the 2017 target level.
State officials said this approach lets companies determine how much a site will likely pollute, so regulators can take that into account when they issue air pollution permits later.
Democratic Speaker of the House KC Becker from Boulder said her party doesn’t want to put the industry out of business, but now that they’re in charge they’re ready to move things forward.
New EPA tests show elevated levels of metal affecting the air quality in Pueblo. The results are linked to a smelter that was designated a Superfund site in 2014.
The challenge asked cities to come up with innovative solutions to big problems that other cities could copy.
A replacement rule from the Interior Department rescinds mandates for companies to reduce gas pollution.
Microscopic inhalable particles from wildfire smoke can get deep into the lungs and play havoc with those who suffer from heart and respiratory issues.
Emily Fischer and her team pilot a specially outfitted aircraft to research smoke and air quality.