Yokomachi, Itoigawa-shi, Niigata-ken Air Pollution:
Real-time Air Quality Index (AQI)

Yokomachi, Itoigawa-shi, Niigata-ken糸魚川糸魚川市
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Yokomachi, Itoigawa-shi, Niigata-ken AQI: Yokomachi, Itoigawa-shi, Niigata-ken Real-time Air Quality Index (AQI).
53
Moderate
Updated on Friday 13:00
temperature: 31°C
currentpast 2 daysminmax
PM2.5 AQI
53Yokomachi, Itoigawa-shi, Niigata-ken, 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.961
PM10 AQI
21Yokomachi, Itoigawa-shi, Niigata-ken, 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.324
O3 AQI
23Yokomachi, Itoigawa-shi, Niigata-ken, 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.438
NO2 AQI
1Yokomachi, Itoigawa-shi, Niigata-ken, 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
2Yokomachi, Itoigawa-shi, Niigata-ken, 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.23
Temp.
31Yokomachi, Itoigawa-shi, Niigata-ken, Japan t (temp.) measured by Citizen Weather Observer Program (CWOP/APRS).2332
Pressure
1013Yokomachi, Itoigawa-shi, Niigata-ken, Japan p (pressure:) measured by Citizen Weather Observer Program (CWOP/APRS).10131015
Humidity
76Yokomachi, Itoigawa-shi, Niigata-ken, Japan h (humidity) measured by Citizen Weather Observer Program (CWOP/APRS).6897
Wind
4Yokomachi, Itoigawa-shi, Niigata-ken, Japan w (wind) measured by Citizen Weather Observer Program (CWOP/APRS).05
MarkerMarkerMarker
map © OpenStreetMap contributors

Air Quality Forecast
FRI 15
28°C
22°C
SAT 16
27°C
22°C
SUN 17
29°C
23°C
MON 18
28°C
23°C
TUE 19
28°C
22°C
WED 20
27°C
22°C
THU 21
27°C
22°C
PM2.5
Friday 15Saturday 16Sunday 17Monday 18Tuesday 19Wednesday 20Thursday 21
hour
14710131619221471013161922147101316192214710131619221471013161922147101316192214710131619
Wind Speed (m/s)
3223212112122111222465333224321122132222321321233333211























































Temp.
23°23°26°27°27°26°23°23°22°22°25°27°26°26°24°24°23°23°27°28°29°27°24°23°23°23°26°27°28°26°23°23°23°22°26°28°28°27°24°24°23°23°26°26°25°24°22°22°22°22°26°27°26°25°24°
relative humidity
76766763677989858482777478798785848371676776848181807168688090827870666261728578828072778587888584806670738584
barometric pressure
1016101610161015101510151016101510151015101510151014101410151015101410141015101510141014101510161016101610171016101510151016101510141014101510141013101310141013101210121013101210121012101310131013101410151014101310141014
total precipitation
0.10.10.30.30.60.40.70.10.10.10.10.10.10.10.10.20.90.10.10.53.60.71.81.41.40.10.30.3
UVI:
8


5:06 ~ 18:42
UVI:
8


5:07 ~ 18:41
UVI:
8


5:08 ~ 18:40
UVI:
6


5:08 ~ 18:39
UVI:
10


5:09 ~ 18:37


5:10 ~ 18:36


5:11 ~ 18:35
Forecast plotted using timezone +09:00
Latest forecast updates:
Wind: an hour ago [Aug 15, 2025 4:43 AM]
fine particulate matter: 12 hours ago [Aug 14, 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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