Highest air pollution Katwijk, today and tomorrow
Today (30 June): Air quality in Katwijk is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (NO2: 31.9/100).
Tomorrow (1 July 2026): Air quality in Katwijk is fair. All pollutants stay as today. Pollution peaks around 12:00 AM (NO2: 31.4/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Katwijk's air quality benefits from its direct North Sea coastal position in South Holland, with powerful North Sea westerlies providing reliable and consistent maritime ventilation along the Dutch coast. Vehicle traffic on the N206 and Katwijk's residential and beach resort character are the primary local sources, while the Katwijk aan Zee beach and the open North Sea fetch generally maintain excellent to good coastal conditions and keep Katwijk among the Netherlands' cleaner coastal communities.
Today - 30 June | Pollution peaks at 23:00
AQI:
Fair
31.9/100
PM2.5 (fine particles):
Good
11.3/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Fair
31.9/100
O3 (ozone):
Fair
20.3/100
SO2 (sulfur dioxide):
Good
6.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.5/100
PM1 (ultrafine particles):
Good
8.3/100
Levels show the poorest local air quality during the day
Tomorrow - 1 July | Pollution peaks at 00:00
AQI:
Fair
31.4/100
PM2.5 (fine particles):
Good
13.7/100
PM10 (coarse particles):
Good
5.2/100
NO2 (nitrogen dioxide):
Fair
31.4/100
O3 (ozone):
Fair
22.6/100
SO2 (sulfur dioxide):
Good
6.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.5/100
PM1 (ultrafine particles):
Good
9.7/100
Pollen forecast in Katwijk
View pollen forecastFrequently Asked Questions
Is air quality bad in Katwijk right now?
On 30 June 2026, overall air quality in Katwijk is fair. AQI is the main air quality indicator at 31.9/100. Pollution peaks around 11:00 PM (NO2: 31.9/100).
Will air quality be worse tomorrow in Katwijk?
On 1 July 2026, air quality conditions in Katwijk will be similar to today, with AQI forecast at fair at 31.4/100. Pollution peaks around 12:00 AM (NO2: 31.4/100).
Are air quality levels in Katwijk 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.
Want to see air quality forecasts for other cities in Netherlands?
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Data provided by Airmine — Last update: 30 June 2026 at 12:38 CET (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.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team