Worst air pollution Hiratsuka, today and tomorrow
Today (21 September): Air quality in Hiratsuka is moderate. AQI and NO2 are moderate; PM2.5, PM10, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (NO2: 41.1/100).
Tomorrow (22 September 2026): Air quality in Hiratsuka is moderate. All pollutants stay as today. Pollution peaks around 3:00 PM (NO2: 46.7/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Kakogawachō-honmachi's air quality reflects the Hyogo Prefecture Kakogawa River delta position on the Harima Sea, with vehicle traffic on surrounding roads and the Kobe Steel Kakogawa Works — one of Japan's major steel operations — generating elevated industrial PM2.5 alongside vehicle sources. Consistent Seto Inland Sea maritime breezes provide coastal ventilation, while the steel complex's industrial scale represents the most distinctive local emission source and Kakogawa generally maintains moderate to elevated Hyogo Prefecture industrial coastal readings throughout most of the year.
Today - 21 September | Pollution peaks at 15:00
AQI:
Moderate
41.1/100
PM2.5 (fine particles):
Good
5.4/100
PM10 (coarse particles):
Good
6.3/100
NO2 (nitrogen dioxide):
Moderate
41.1/100
O3 (ozone):
Good
15.6/100
SO2 (sulfur dioxide):
Good
6.1/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
4.7/100
PM1 (ultrafine particles):
Good
6.1/100
Levels show the poorest local air quality during the day
Tomorrow - 22 September | Pollution peaks at 15:00
AQI:
Moderate
46.7/100
PM2.5 (fine particles):
Good
13.9/100
PM10 (coarse particles):
Good
17.0/100
NO2 (nitrogen dioxide):
Moderate
46.7/100
O3 (ozone):
Good
15.3/100
SO2 (sulfur dioxide):
Good
13.3/100
CO (carbon monoxide):
Good
1.3/100
HCHO (formaldehyde):
Good
8.0/100
PM1 (ultrafine particles):
Good
15.1/100
Frequently Asked Questions
Is air quality bad in Hiratsuka right now?
On 21 September 2026, overall air quality in Hiratsuka is moderate. AQI is the main air quality indicator at 41.1/100. Pollution peaks around 3:00 PM (NO2: 41.1/100).
Will air quality be worse tomorrow in Hiratsuka?
On 22 September 2026, air quality conditions in Hiratsuka will be similar to today, with AQI forecast at moderate at 46.7/100. Pollution peaks around 3:00 PM (NO2: 46.7/100).
When is air pollution at its worst in Hiratsuka?
The biggest local contributors to pollution in Hiratsuka are traffic emissions and petrochemical and refining operations, particularly once dry, windy weather picks up. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. Onshore breezes usually help clear the air, but pollution can build up when winds are light.
Are air quality levels in Hiratsuka based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 22 September 2026 at 02:59 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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