Air quality · PM2.5fair
11.3 µg/m³
The available annual series averages 2.3× the WHO annual guideline of 5 µg/m³. The daily average exceeded 15 µg/m³ on 73 days.
The recent period is 8% lower than the preceding period.
Haarlem
Noord-Holland165.396 residents31,9 km²
75
sensors, 2,3/km²
Public summary
What the measurements in Haarlem show
The citizen sensor network in Haarlem, Noord-Holland, contains 75 sensors: an average of 2.3 per km². Projects including Hollandse Luchten and Luftdaten contribute measurements to this public network.
Noise
Haarlem does not yet have a reliable municipality-wide noise series. MedeMeter is designed to make local noise patterns near homes visible.
Building the report for Haarlem…
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.
