North Texas saw 14 days of unhealthy air pollution in September, the most the region has seen in one month so far this year, according to the latest regional data.
The Texas Commission on Environmental Quality issued ozone action day alerts on most of those days. Such alerts warn residents, businesses and industries when weather conditions are likely to create high levels of ozone, urging them to mitigate emissions, such as those generated by cars and power plants.
August had 10 days of high smog levels, according to the data…