Shiromachi, Hita, Oita Prefecture Air Pollution:
Real-time Air Quality Index (AQI)

Shiromachi, Hita, Oita Prefecture西部振興局日田市
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Shiromachi, Hita, Oita Prefecture AQI: Shiromachi, Hita, Oita Prefecture Real-time Air Quality Index (AQI).
25
Good
Updated on Monday 8:00
temperature: 29°C
currentpast 2 daysminmax
PM2.5 AQI
25Shiromachi, Hita, Oita Prefecture, Japan PM25 (fine particulate matter) measured by Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム). Values are converted to the US EPA AQI standard.1355
PM10 AQI
10Shiromachi, Hita, Oita Prefecture, Japan PM10 (respirable particulate matter) measured by Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム). Values are converted to the US EPA AQI standard.239
O3 AQI
2Shiromachi, Hita, Oita Prefecture, Japan O3 (ozone) measured by Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム). Values are converted to the US EPA AQI standard.140
NO2 AQI
1Shiromachi, Hita, Oita Prefecture, Japan NO2 (nitrogen dioxide) measured by Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム). Values are converted to the US EPA AQI standard.13
SO2 AQI
-Shiromachi, Hita, Oita Prefecture, Japan SO2 (sulfur dioxide) measured by Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム). Values are converted to the US EPA AQI standard.320
Temp.
29Shiromachi, Hita, Oita Prefecture, Japan t (temp.) measured by Citizen Weather Observer Program (CWOP/APRS).2634
Pressure
1017Shiromachi, Hita, Oita Prefecture, Japan p (pressure:) measured by Citizen Weather Observer Program (CWOP/APRS).10131017
Humidity
74Shiromachi, Hita, Oita Prefecture, Japan h (humidity) measured by Citizen Weather Observer Program (CWOP/APRS).5488
Wind
3Shiromachi, Hita, Oita Prefecture, Japan w (wind) measured by Citizen Weather Observer Program (CWOP/APRS).16
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Air Quality Forecast
MON 18
30°C
22°C
TUE 19
29°C
22°C
WED 20
29°C
21°C
THU 21
29°C
22°C
FRI 22
31°C
22°C
SAT 23
29°C
22°C
SUN 24
28°C
23°C
PM2.5
Monday 18Tuesday 19Wednesday 20Thursday 21Friday 22Saturday 23Sunday 24
hour
14710131619221471013161922147101316192214710131619221471013161922147101316192214710131619
Wind Speed (m/s)
1101221121011112211222111112221111112211101212101111111























































Temp.
23°22°25°29°29°26°23°22°22°22°25°29°28°28°23°22°22°21°25°28°29°28°24°23°22°22°25°27°28°27°25°23°22°22°25°30°31°27°24°23°22°22°28°29°29°27°24°23°23°23°26°28°28°26°24°
relative humidity
95969174768794909294867076789294959485726871939595968782738190949696856059778790939574737388939596968783829296
barometric pressure
1017101710181017101510151016101610151015101610151014101310141013101310121013101210101010101110101011101110111011100910091010101110101011101110101009100910111011101010111012101110101011101210121012101310141013101210131014
total precipitation
10.64.74.14.90.10.10.32.31.14.61.13.10.10.60.10.610.20.40.10.10.10.30.20.30.92.21.82.10.32.66.36.87.2
UVI:
7


5:42 ~ 19:01
UVI:
7


5:42 ~ 19:00
UVI:
7


5:43 ~ 18:58
UVI:
7


5:44 ~ 18:57
UVI:
8


5:44 ~ 18:56


5:45 ~ 18:55


5:46 ~ 18:54
Forecast plotted using timezone +09:00
Latest forecast updates:
Wind: 2 hours ago [Aug 17, 2025 10:43 PM]
fine particulate matter: 6 hours ago [Aug 17, 2025 6:12 PM]
click to view the detailed forecast

Air Quality Data provided by: the Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム) (soramame.env.go.jp)

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About the Air Quality and Pollution Measurement:

About the Air Quality Levels

AQIAir Pollution LevelHealth ImplicationsCautionary Statement (for PM2.5)
0 - 50GoodAir quality is considered satisfactory, and air pollution poses little or no riskNone
51 -100ModerateAir quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
101-150Unhealthy for Sensitive GroupsMembers of sensitive groups may experience health effects. The general public is not likely to be affected.Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
151-200UnhealthyEveryone may begin to experience health effects; members of sensitive groups may experience more serious health effectsActive children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion
201-300Very UnhealthyHealth warnings of emergency conditions. The entire population is more likely to be affected.Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
300+HazardousHealth alert: everyone may experience more serious health effectsEveryone should avoid all outdoor exertion

To know more about Air Quality and Pollution, check the wikipedia Air Quality topic or the airnow guide to Air Quality and Your Health.

For very useful health advices of Beijing Doctor Richard Saint Cyr MD, check www.myhealthbeijing.com blog.


Usage Notice: All the Air Quality data are unvalidated at the time of publication, and due to quality assurance these data may be amended, without notice, at any time. The World Air Quality Index project has exercised all reasonable skill and care in compiling the contents of this information and under no circumstances will the World Air Quality Index project team or its agents be liable in contract, tort or otherwise for any loss, injury or damage arising directly or indirectly from the supply of this data.



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