The Environmental Protection Agency is standing pat on its current ozone air pollution limits, concluding on Wednesday that years of scientific review don’t justify strengthening the regulation beyond the current 70 parts per billion threshold.
Retaining the current limit without revision is almost certain to be challenged in court. Environmental and public health groups also say they will press the Biden administration to tighten the standard.
“The last several years have seen spectacular improvements benefiting the health of millions of Americans,” EPA Administrator Andrew Wheeler said Wednesday. “We believe the best call at this point is to retain the existing ...