AQI

Hamilton County Air Quality Index & Realtime Air Pollution

Live AQI
78(AQI-US)
Air Quality is
Moderate
PM2.5 :25µg/m³
PM10 :25.7µg/m³
Good
Moderate
Poor
Unhealthy
Severe
Hazardous
050100150200300301+
Moderate air quality mascot

Primary Air Pollutants Hamilton County (Ohio)

PM2.525µg/m³
PM2.5
Fine particles
PM1026µg/m³
PM10
Coarse particles
SO₂3µg/m³
SO₂
Sulphur dioxide
CO244µg/m³
CO
Carbon monoxide
NO₂3µg/m³
NO₂
Nitrogen dioxide
O₃141µg/m³
O₃
Ozone

Hourly forecast Hamilton County (Ohio)

Now31°
Overcast
19:0031°
Partly cloudy
20:0030°
Overcast
21:0029°
Overcast
22:0027°
Clear sky
23:0025°
Overcast
00:0025°
Overcast
01:0025°
Overcast
02:0024°
Overcast
03:0023°
Overcast
04:0023°
Overcast
05:0023°
Overcast
06:0023°
Overcast
07:0024°
Overcast
08:0025°
Light drizzle
09:0027°
Overcast
10:0029°
Clear sky
11:0022°
Overcast
12:0024°
Overcast
13:0023°
Moderate rain
14:0022°
Moderate rain
15:0024°
Overcast
16:0027°
Overcast
17:0028°
Overcast

Health Recommendations for Hamilton County Residents

Based on current air quality: Moderate · AQI 78

Moderate
Air Purifier
Air PurifierTurn On
Car Filter
Car FilterMust
N95 Mask
N95 MaskMust
Stay Indoor
Stay IndoorMust

UV Index

1.25

Low

Safe to be outside. Minimal UV risk.

Wind

9.4 km/h

Light breeze — leaves rustling gently.

AQI Graph

Historical AQI Data Hamilton County (Ohio)

68
Min. AQIat 4:00 AM on 20th Jul
124
Max. AQIat 3:00 PM on 20th Jul
19-07-2026Time20-07-2026

United States Major Cities AQI Overview

New York landmark

New York

70

Temp.

22.7°C

Hum.

81%

Los Angeles landmark

Los Angeles

68

Temp.

21.7°C

Hum.

75%

Chicago landmark

Chicago

21

Temp.

25.3°C

Hum.

77%

Houston landmark

Houston

58

Temp.

26.5°C

Hum.

92%

Phoenix landmark

Phoenix

59

Temp.

28.4°C

Hum.

56%

San Francisco landmark

San Francisco

46

Temp.

16.7°C

Hum.

80%

Seattle landmark

Seattle

78

Temp.

16.9°C

Hum.

80%

Denver landmark

Denver

27

Temp.

22.4°C

Hum.

57%

Philadelphia landmark

Philadelphia

47

Temp.

26.5°C

Hum.

81%

San Antonio landmark

San Antonio

53

Temp.

25.1°C

Hum.

91%

Dallas landmark

Dallas

39

Temp.

30°C

Hum.

57%

Atlanta landmark

Atlanta

38

Temp.

25.3°C

Hum.

83%

Most Polluted Cities by AQI United States

1.Detroit, Michigan
91
Moderate6x above Standard
2.Charleston, West Virginia
89
Moderate6x above Standard
3.Grand Rapids, Michigan
88
Moderate6x above Standard
4.Lansing, Michigan
88
Moderate6x above Standard
5.Ann Arbor, Michigan
87
Moderate6x above Standard
6.Cleveland, Ohio
84
Moderate6x above Standard
7.Cincinnati, Ohio
81
Moderate5x above Standard
8.Toledo, Ohio
80
Moderate5x above Standard
9.Columbus, Ohio
79
Moderate5x above Standard
10.Louisville, Kentucky
77
Moderate5x above Standard
AQI City Rankings
Last Updated: 20 Jul 2026, 15:01

Health Advice For People Living in Hamilton County

1.1
Cigarettes
per day
Weekly7.7 Cigarettes
Monthly33 Cigarettes

Breathing the air in this location is equivalent to smoking 1.1 cigarettes a day.

Disclaimer: This cigarette-equivalent estimate is calculated using the average PM2.5 concentration from the past 24 hours, assuming constant exposure throughout that period.
Solutions for Hamilton County Current AQI (US)
Air Purifier
Air PurifierTurn On
Car Filter
Car FilterMust
N95 Mask
N95 MaskMust
Stay Indoor
Stay IndoorMust
Must turn on the air purifier to enjoy fresh air.Get an Air Purifier →

Prevent Health Problems: Understand Your Risks

Hamilton County · Current air quality: Moderate · AQI 78

Mild Trigger Risk

Headaches

Risk of Headaches symptoms is Mild when AQI of Hamilton County is Moderate (51-100).

Common signs

Signs to look out for include: Pressure or tightness around the forehead and temples, Sensitivity to light or smell, Fatigue or difficulty concentrating.

Do’s :
  • Opt for indoor, air with filtration when the AQI is poor.
  • Increase fluids and rest from digital screens or intense light if you are migraine-prone.
  • If you Use prescribed migraine meds, Keep them accessible.
Don’ts :
  • Don’t do intense outdoor exercise during elevated AQI periods.
  • Do not ignore worsening signs that feel unusual for you.

Disclaimer: The health risks mentioned above are precautionary recommendations based on current AQI levels. While you may not experience immediate effects, prolonged exposure to air pollution can lead to these health issues over time. This is not medical advice. Please consult a clinician if you experience severe, unusual, or worsening symptoms.

Hamilton County's Nearby Cities AQI

1.Hamilton
State: Ohio
Population: 830,639
Check AQI
2.Butler
State: Ohio
Population: 390,357
Check AQI
3.Montgomery
State: Ohio
Population: 537,309
Check AQI
4.Greene
State: Ohio
Population: 167,966
Check AQI
5.Clark
State: Ohio
Population: 136,001
Check AQI
6.Franklin
State: Ohio
Population: 1,321,414
Check AQI
7.Delaware
State: Ohio
Population: 37,995
Check AQI
8.Licking
State: Ohio
Population: 178,519
Check AQI
9.Richland
State: Ohio
Population: 124,936
Check AQI
10.Lucas
State: Ohio
Population: 431,279
Check AQI
11.Lorain
State: Ohio
Population: 63,647
Check AQI
12.Stark
State: Ohio
Population: 374,853
Check AQI
13.Summit
State: Ohio
Population: 540,428
Check AQI
14.Cuyahoga
State: Ohio
Population: 1,264,817
Check AQI
15.Portage
State: Ohio
Population: 161,791
Check AQI
16.Mahoning
State: Ohio
Population: 228,614
Check AQI
17.Lake
State: Ohio
Population: 232,603
Check AQI
18.Ashtabula
State: Ohio
Population: 18,371
Check AQI

Air Quality FAQs at Hamilton County, Ohio

The current real-time AQI (US) level in Hamilton County, Ohio is 78 (Moderate). This was last updated recently.

The best AQI (US) level was generally lower during the early afternoon in the last 24 hours.

The worst AQI (US) level typically peaks during early morning or late evening hours due to temperature inversion.

The AQI (US) levels in Hamilton County, Ohio have been fluctuating throughout the last 24 hours depending on traffic and weather conditions.

Current AQI (US) levels are moderate for everyone. It's advised to adjust your outdoor activities based on personal sensitivity.