St. Louis must now meet much stricter air quality rules
What happened
US environmental regulators just tightened air quality rules for the Missouri portion of St. Louis. This means the area now faces much stricter requirements to reduce ozone pollution.
Why it matters
When an area fails to meet federal air quality standards, it gets a new label. This new label, 'Serious' nonattainment, means local governments and businesses in St. Louis will now face more expensive and difficult requirements to clean up the air. This includes stricter permitting for new industrial facilities and potentially new rules for vehicle emissions.
The signal
Watch for the specific new emissions control plans local authorities propose and how industries respond to the increased regulatory burden.