Ozone Season Goes Out in Orange

UPDATE: 8:30 PM    Things cooled off rapidly after 5pm and so did the ozone levels, just in the nick of time too. The Keller monitor barely escapes establishing a new season “4th high” and setting off a chain reaction that would have increased the entire regional ozone average by a part per billion or so. Instead, it merely tied its 4th highest reading of 95 ppb and the region’s Design Value stays at 90 ppb. Parker County did set a record today – its highest 8-hour average this summer, also at 95 ppb. Another day like today and it could be the 7th monitor out of compliance this year. Eagle Mountain Lake also saw its highest 8-hour average reading this year at 87ppb. A final middle finger salute to DFW from the Smog Monster in what’s been the worst year for ozone since 2006? We still have a week and a half to go until “ozone season” ends.