Federal data says toxic emissions are declining in central Ohio.
Columbus was largely spared, but many areas south of the city had snow plows out and students at home after the latest winter storm.
Heavy overnight rain and melting snow have high water forcing the closure of several roads around Central Ohio.
Parts of winter-weary Ohio are getting more snow.
The department wanted to buy 150,000 tons of salt for communities and then have them to return the salt after they replenish their supplies. But no salt companies bid in the 10-day window that ended Friday.
Columbus city officials have been getting an earful in the past week. More than 1,000 people called Columbusâ€™s 311 line complaining about the cityâ€™s snow removal efforts after last weekâ€™s storm.
What could be the biggest snow storm to hit Ohio this season is on the way later Tuesday and early Wednesday.
Ohio is bracing for arctic temperatures unseen in 20 years, as a new round of winter storms starting early Sunday ushers in two days of punishing temperatures and wind chills.
Temperatures fell below zero in many areas early Friday, with wind chills nearing -20 degrees.
Forecasts call for up to five inches of snow for Central Ohio on Thursday.
Ohio drivers on Friday face treacherous road conditions with a wintry storm forecast for much of the state. Forecasters say the storm will hit most of southwest and central Ohio with 3 to 6 inches of snow by Friday evening.