BOULDER, Wyo. — There isn’t anything metropolitan about this tiny unincorporated town in southwest Wyoming, where a few single-family homes and a volunteer fire station stand against a skyline of snowcapped mountains.
But Boulder, with a population of 75 people, has one thing in common with major metropolitan areas: air pollution thick enough to pose health risks.
“Used to be you could see horizon to horizon, crystal clear. Now you got this,” said Craig Jensen as he gestured to a pale blue sky that he says is not as deeply colored as it used to be. “Makes you wonder what it’s going to do to the grass, the trees and the birds.”
The pollution, largely from the region’s booming natural-gas industry, comes in the form of ground-level ozone, which has exceeded healthy levels 11 times since January and caused Wyoming to issue its first ozone alerts. Now the ozone threatens to cost the industry and taxpayers millions of dollars to stay within federal clean-air laws.
Sublette County is home to one of the largest natural gas reserves in North America, and it is dotted with hundreds of gas wells to supply the nation’s growing demand for cleaner-burning fuel. Thousands more wells are planned for the future.
But pollution from vehicles and equipment in the gas fields — along with dust, weather and geography — have raised ozone to a level that rivals those of big cities in the summertime.
Wyoming’s ozone problem comes at a time when the federal government has strengthened its ozone restrictions to better protect public health. In March, the Environmental Protection Agency set a new ozone standard of 75 parts per billion, down from 80 parts per billion.
The peak eight-hour average for ozone near Boulder reached 122 parts per billion on Feb. 21 and 102 parts per billion on March 11.
By comparison, the Los Angeles area hit a peak average of 152 parts per billion last summer, and Denver recorded a peak of 98 parts per billion last July.
Failure to meet federal air-quality standards could result in mandatory pollution-cutting measures ranging from restricting woodburning stoves in homes to placing limits on the booming oil and gas industry.
Conservation groups have seized on the ozone alerts in their efforts to curb drilling for natural gas in the area.
The energy industry says it has been working with regulators to ease the problem and insists drilling should not be curtailed.
