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GRAND JUNCTION, Colo. (AP) - Rio Blanco County may be producing more ozone than allowed by federal standards.

The Grand Junction Sentinel Wednesday that initial readings from a Rangely monitor show ozone levels above federal limits. Official readings won't be available until May 2014.

Gordon Pierce of Colorado's Air Pollution Control Division said the county won't officially be in violation of the federal standards until then but he doesn't think there's any reason to question the draft readings.

A violation would likely trigger increased regulations on oil and gas wells. They produce volatile organic compounds, a key factor in ozone pollution.