Air quality in United States

Air quality in Ohio today

Updated Sun, 25 Oct 2026 19:41:43 GMT

Good: average US AQI 47 across 28 cities in Ohio Worst now: Toledo (62); cleanest: Newark, OH (34).

Live US AQI, PM2.5 and ozone for cities across Ohio, compared with the United States average.

Right now the modelled air quality in Ohio averages a US AQI of 47 (Good) across the 28 cities we track. By category: 16 Good, 12 Moderate (of 28).

That is close to the United States average of 49, ranking 32 of 51 states from cleanest to most polluted.

Toledo has the worst air at 62 (PM2.5 6.5 µg/m³), and Newark, OH the cleanest at 34. No tracked city is above 100, so no group needs to change plans.

Ohio cities by AQI (most polluted first)

City	US AQI	Category	PM2.5 µg/m³	PM10 µg/m³	Ozone µg/m³
Toledo	62	Moderate	6.5	7	115
Oregon	62	Moderate	6.5	7	115
Lima	60	Moderate	4	4	116
Springfield	54	Moderate	4.6	5	118
Findlay	54	Moderate	3.3	3	115
Oxford	54	Moderate	6	6	128
Delaware	53	Moderate	4.6	5	109
Marion	53	Moderate	4.6	5	109
Lebanon	53	Moderate	5.6	6	125
Akron	51	Moderate	5	5	117
Green	51	Moderate	5	5	117
Hudson	51	Moderate	5	5	117
Cleveland	48	Good	7.9	8	117
Cincinnati	46	Good	5.6	6	128
Hamilton	46	Good	5.6	6	128
Dayton	43	Good	4.1	4	118
Kettering	43	Good	4.1	4	118
Canton	42	Good	3.2	3	108
Alliance	42	Good	3.2	3	108
Columbus	39	Good	3.6	4	104
Dublin	39	Good	3.6	4	104
Youngstown	38	Good	4.9	5	112
Warren	38	Good	4.9	5	112
Mansfield	37	Good	3	3	111
Lancaster	37	Good	3.5	4	106
Portsmouth	37	Good	3.6	4	109
Ashland	37	Good	3	3	111
Newark	34	Good	3.5	4	105

US AQI	Category	What it means
0-50	Good	Air quality is satisfactory and poses little or no risk; a good time for outdoor activity.
51-100	Moderate	Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors.
101-150	Unhealthy for Sensitive Groups	People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors.
151-200	Unhealthy	Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed.
201-300	Very Unhealthy	Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors.
301-500	Hazardous	Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500.

Modelled by CAMS (Copernicus) via Open-Meteo, refreshed twice a day; read hour by hour from the forecast.