Air quality · PM2.5fair
18.2 µg/m³
The available annual series averages 3.6× the WHO annual guideline of 5 µg/m³. The daily average exceeded 15 µg/m³ on 144 days.
The recent period is 36% lower than the preceding period.
Katwijk
Zuid-Holland66.607 residents26,2 km²
14
sensors, 0,5/km²
Public summary
What the measurements in Katwijk show
The citizen sensor network in Katwijk, Zuid-Holland, contains 14 sensors: an average of 0.5 per km². Projects including Luftdaten contribute measurements to this public network.
Noisemerkbaar
46.4 dB(A) nacht
The noise series is based on 1 sensor. The daytime average exceeded 55 dB on 0 of 7 measured days.
Building the report for Katwijk…
We're reading the citizen sensors and making sense of the figures.
did you know?Particulate matter (PM2.5) is roughly 30× thinner than a human hair. Small enough to reach deep into your lungs.
