Japan
Yokohama
Moderate
Air Quality Index
Updated Mar 21, 02:00 AM · Data from OpenAQ
Current Pollution Levels in Yokohama
PM2.5
Moderate23
µg/m³
PM10
N/A—
µg/m³
O₃
N/A—
ppm
Yokohama Air Quality 24-Hour Trend
Air Quality Analysis for Yokohama
Yokohama, Japan air quality this morning is rated Moderate with an Air Quality Index (AQI) of 74. The primary pollutant PM2.5 is measured at 23 µg/m³.
The current PM2.5 level exceeds the WHO annual guideline of 15 µg/m³ but remains within the 24-hour limit of 45 µg/m³. Long-term exposure at this level may still affect sensitive individuals.
PM2.5 levels are stable, staying close to the recent average of 19.3 µg/m³.
Health Recommendation
Air quality in Yokohama is acceptable. Most people can enjoy outdoor activities normally. Unusually sensitive individuals should consider limiting prolonged outdoor exertion.
Acceptable for most
OK for short periods
Recent Yokohama Air Quality Measurements
| Time | AQI | PM2.5 | PM10 |
|---|---|---|---|
| 02:00 AM | 74 | 23 | — |
| 01:00 AM | 70 | 21 | — |
| 12:00 AM | 63 | 18 | — |
| 11:55 PM | 63 | 18 | — |
| 11:22 PM | 63 | 18 | — |
| 11:08 PM | 63 | 18 | — |
Frequently Asked Questions
Is air quality in Yokohama safe today?
Yokohama air quality is moderate today with an AQI of 74. Most people can safely go outside, but unusually sensitive individuals may experience minor symptoms.
What AQI level is considered unhealthy?
According to EPA standards, AQI 0-50 is Good, 51-100 is Moderate, 101-150 is Unhealthy for Sensitive Groups, 151-200 is Unhealthy, 201-300 is Very Unhealthy, and above 300 is Hazardous. The WHO recommends annual PM2.5 levels below 15 µg/m³ for optimal health.
Should I wear a mask today in Yokohama?
With Yokohama's current AQI of 74, masks are generally not necessary for most people. However, if you have respiratory conditions, a mask may provide additional comfort.
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