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How clean is the air?

EPA's Air Quality System annual summaries for 2025: the map shows the annual average of fine particulate matter (PM2.5) at the monitor nearest each ZIP's population-weighted center, against the 9 µg/m³ national standard adopted in 2024. Ohio has only 38 PM2.5 monitors, so a reading can come from a city 30 miles away; the card gives the distance, the nearest ozone monitor's fourth-highest daily reading (the design-value ingredient, 70 ppb standard), and the county's Air Quality Index day counts where the county has a monitor of its own. EPA's ECHO adds the permitted air sources inside the ZIP, their classification and their recent violations. EPA's Green Book says whether the county is in nonattainment or under a maintenance plan for any standard. A second county row counts the good, moderate and worse days indexed so far in 2026, as far as EPA's daily file runs.

1,229 of 1,233 ZIPs have data; median 8.7 µg/m³.

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Under 7.5 µg/m³ PM2.5 · 222 7.5 to 8.5 · 225 8.5 to 9 · 567 9 to 10 · 195 10 µg/m³ and up · 20 No data · 4

Highest and lowest

Highest

  1. 44286 · Richfield12.7 µg/m³
  2. 44233 · Hinckley Township and Hinckley12.7 µg/m³
  3. 44149 · Strongsville12.7 µg/m³
  4. 44147 · Broadview Heights12.7 µg/m³
  5. 44144 · Brooklyn and Cleveland12.7 µg/m³
  6. 44142 · Brook Park and Brookpark12.7 µg/m³
  7. 44141 · Brecksville12.7 µg/m³
  8. 44136 · Strongsville12.7 µg/m³
  9. 44134 · Parma and Cleveland12.7 µg/m³
  10. 44133 · North Royalton12.7 µg/m³
  11. 44131 · Seven Hills and Independence12.7 µg/m³
  12. 44130 · Parma Heights and Cleveland12.7 µg/m³
  13. 44129 · Parma and Cleveland12.7 µg/m³
  14. 44125 · Garfield Heights and Cleveland12.7 µg/m³
  15. 44109 · Cleveland12.7 µg/m³

Lowest

  1. 43107 · Rushcreek Township and Bremen5.6 µg/m³
  2. 43111 · Ward Township and Carbon Hill5.6 µg/m³
  3. 43127 · Green Township and Haydenville5.6 µg/m³
  4. 43138 · Logan5.6 µg/m³
  5. 43144 · Murray City5.6 µg/m³
  6. 43152 · Benton Township and South Bloomingville5.6 µg/m³
  7. 43158 · Starr Township and Union Furnace5.6 µg/m³
  8. 43701 · Zanesville5.6 µg/m³
  9. 43711 · Buffalo Township and Ava5.6 µg/m³
  10. 43717 · Belle Valley5.6 µg/m³
  11. 43720 · Blue Rock Township and Blue Rock5.6 µg/m³
  12. 43722 · Valley Township and Buffalo5.6 µg/m³
  13. 43723 · Jackson Township and Byesville5.6 µg/m³
  14. 43724 · Olive Township and Caldwell5.6 µg/m³
  15. 43725 · Cambridge5.6 µg/m³

Source

EPA Air Quality System 2025 annual summaries: nearest PM2.5 and ozone monitors from each ZIP's population-weighted center, county AQI day counts; EPA ECHO Clean Air Act permitted sources in Ohio (air_rest_services, September 2026); EPA Green Book county nonattainment and maintenance status (nayro.xls, current as of August 31, 2026); EPA daily county AQI file for 2026 (January to May 31, 2026)

EPA air data files · EPA AirToxScreen · EPA Green Book · EPA ECHO

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Quick answers

Which Ohio ZIP code has the highest fine-particle (PM2.5) air pollution?

ZIP code 44286 (Richfield, 12.7 µg/m³) ranks highest, followed by 44233 (Hinckley Township and Hinckley, 12.7 µg/m³) and 44149 (Strongsville, 12.7 µg/m³). EPA's Air Quality System annual summaries for 2025: the map shows the annual average of fine particulate matter (PM2.5) at the monitor nearest each ZIP's population-weighted center, against the 9 µg/m³ national standard adopted in 2024.

Which Ohio ZIP code has the lowest fine-particle (PM2.5) air pollution?

ZIP code 43107 (Rushcreek Township and Bremen, 5.6 µg/m³) ranks lowest, followed by 43111 (Ward Township and Carbon Hill, 5.6 µg/m³) and 43127 (Green Township and Haydenville, 5.6 µg/m³). EPA's Air Quality System annual summaries for 2025: the map shows the annual average of fine particulate matter (PM2.5) at the monitor nearest each ZIP's population-weighted center, against the 9 µg/m³ national standard adopted in 2024.

What is the typical fine-particle (PM2.5) air pollution in Ohio?

Across Ohio ZIP codes: 1,229 of 1,233 ZIPs have data; median 8.7 µg/m³. EPA's Air Quality System annual summaries for 2025: the map shows the annual average of fine particulate matter (PM2.5) at the monitor nearest each ZIP's population-weighted center, against the 9 µg/m³ national standard adopted in 2024.

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Cracked Buckeye, "Air", https://crackedbuckeye.com/topics/air/, built 2026-10-31, accessed [date].

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