Worst air pollution Cilacap, today and tomorrow
Today (20 September): Air quality in Cilacap is very poor. AQI and PM1 are very poor; PM2.5 is poor; PM10 is moderate; NO2 is fair; O3, SO2, CO, and HCHO are good. Pollution peaks around 11:00 PM (PM1: 90.9/100).
Tomorrow (21 September 2026): Air quality in Cilacap is very poor. PM10 increases to poor; all other pollutants stay as today. Pollution peaks around 4:00 AM (PM1: 100/100). Airmine updates local air quality forecasts four times daily.
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Cilacap's air quality reflects the flat Central Java southern coast position on the Indian Ocean, with vehicle traffic on surrounding roads and the Pertamina oil refinery — Indonesia's largest — and cement corridor generating elevated industrial SO₂ and PM2.5. Consistent Indian Ocean maritime breezes provide coastal ventilation, while the refinery's extraordinary industrial scale makes Cilacap Indonesia's most distinctively petroleum refinery-defined coastal industrial environment throughout most of the year.
Today - 20 September | Pollution peaks at 23:00
AQI:
Very poor
90.9/100
PM2.5 (fine particles):
Poor
62.7/100
PM10 (coarse particles):
Moderate
55.6/100
NO2 (nitrogen dioxide):
Fair
28.4/100
O3 (ozone):
Good
13.1/100
SO2 (sulfur dioxide):
Good
8.7/100
CO (carbon monoxide):
Good
3.2/100
HCHO (formaldehyde):
Good
7.9/100
PM1 (ultrafine particles):
Very poor
90.9/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 04:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Poor
72.9/100
PM10 (coarse particles):
Poor
63.1/100
NO2 (nitrogen dioxide):
Fair
36.0/100
O3 (ozone):
Good
13.4/100
SO2 (sulfur dioxide):
Good
10.0/100
CO (carbon monoxide):
Good
3.8/100
HCHO (formaldehyde):
Good
8.2/100
PM1 (ultrafine particles):
Very poor
100/100
Pollen forecast in Cilacap
View pollen forecastFrequently Asked Questions
Is air quality bad in Cilacap right now?
On 20 September 2026, overall air quality in Cilacap is very poor. AQI is the main air quality indicator at 90.9/100. Pollution peaks around 11:00 PM (PM1: 90.9/100).
Will air quality be worse tomorrow in Cilacap?
On 21 September 2026, air quality conditions in Cilacap will be similar to today, with AQI forecast at very poor at 100/100. Pollution peaks around 4:00 AM (PM1: 100/100).
When is air pollution at its worst in Cilacap?
The biggest local contributors to pollution in Cilacap are traffic on the surrounding roads along with petrochemical and refining operations, particularly once windblown dust events occur. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. Maritime airflow normally ventilates the area well, though calmer spells let levels rise.
Are air quality levels in Cilacap 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: 20 September 2026 at 14:33 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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