Maryland shifts how big industrial plants can emit nitrogen oxides in summer

Maryland is changing how it allocates nitrogen oxide emission limits for large industrial facilities during ozone season. This means some non-power plants will have different caps on how much pollution they can release into the air.

For years, states have struggled to meet federal clean air standards, especially for ground-level ozone, which is worse in summer. These small, technical adjustments to emission caps can add up. They determine which industrial facilities bear the burden of reducing pollution and by how much.