Maryland

BadAirDays has a full county for each of the 16 places below in Maryland, worked out from the same data for every one of them so the numbers compare directly. Pick yours to see it.

• Anne Arundel County
• Baltimore City
• Baltimore County
• Calvert County
• Carroll County
• Cecil County
• Charles County
• Dorchester County
• Frederick County
• Garrett County
• Harford County
• Howard County
• Kent County
• Montgomery County
• Prince George's County
• Washington County