Northeast Ohio ozone attainment: What it means and what it doesn'tNortheast Ohio now meets the federal ozone standard, helping clear the way for Ohio's effort to end E-Check. But the EPA designation measures long-term air quality, not whether today's air is healthy to breathe. Here's the difference between ozone attainment and the daily Air Quality Index.cleveland.com11d agoWhole story →Planetozone attainment designation
