SmogRank / World / United States / Maryland / June 2025

Most unhealthy days in Maryland, United States, June 2025

11 cities in Maryland, United States ranked by their share of unhealthy days over the 30 days. The most unhealthy days: Edgewood, United States, 1 of 25 measured days. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Edgewood 4% 3%0
Every city in Maryland, United States ranked for June 2025, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Edgewood
    1 of 25
  2. 2Scaggsville
    0 of 30
  3. 3Oxon Hill-Glassmanor
    0 of 30
  4. 4Baltimore
    0 of 30
  5. 4Essex
    0 of 29
  6. 6Frostburg
    0 of 25
  7. 6Halfway
    0 of 26
  8. 8South Laurel
    0 of 30
  9. 9Hunt Valley
    0 of 30
  10. 10Cambridge
    0 of 26
  11. 11Rockville
    0 of 28
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

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SmogRank, most polluted cities in Maryland, United States, by unhealthy days, PM2.5, June 2025, smogrank.com/us/region/maryland/history/2025-06?by=days (accessed 7 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.