An air quality monitoring network built on a new generation of Laser particle counters. PurpleAir Sensors use WiFi to report local air quality in real time to the PurpleAir Map.

In the fall of 2015, Air Quality Monitors were installed along the Wasatch Front in the greater Salt Lake valley. The unique bowl shaped geography experiences frequent winter inversions and traps air pollution. Our goal was to understand and track these changes to air quality.

Update - August 18 2016

PurpleAir has been hard at work building, deploying and building more sensors. We are grateful to all our hosts and and supporters who have helped us get to the 100 sensors online mark that we just passed! 

We designed a whole new prototype sensor that we can make in larger quantities. The new design features a unique to PurpleAir dual laser detectors to ensure reliability and help us to detect any potential faults with the sensors. This hugely increases the reliability of the readings.

SCAQMD results are out and it's good news: The first generation of PurpleAir sensors scored extremely well against "federal equivalent methods".

Find the SCAQMD report here (Look for PurpleAir in the list)http://www.aqmd.gov/aq-spec/evaluations#&MainContent_C001_Col00=2
As a result of these first stage tests, the SCAQMD is putting these devices through their exhaustive lab tests that will show more performance related details. PA-II, dual laser counter models testing is also underway already and we will share those results as we get them.

Getting a PurpleAir Sensor


Buy one now: The new, PurpleAir version 2 sensors with dual laser counters are available for $180 (contact us for more information on quantities discount).


What's In The Box
1) Dual laser counter + BME280 provides particulate, temperature, humidity and pressure.
2) Marine heat shrink pre-joined USB micro.
3) 5V 2A USB Outdoor Power Supply.
4) 33 feet of cable.
5) Mounting screws or Zip Ties.
* Includes placing your sensor on the PurpleAir map.


Full Product Information coming soon. 
Host a sensor on us: We place sensors at no cost in some situations and if you think you qualify to host one (we maintain ownership of the device) please contact us to explain why.

View the PurpleAir Map Live

Choose a starting point below:
  1. The map view updates every 10 seconds. 
  2. Click on a marker to see details for that sensor.
  3. Markers with new data will jump so you know they are live.
  4. Rings around stations show running averages.
  5. Gray stations did not transmit data recently.

Pro Tips for the map:
Click and drag on graphs to zoom in on the data
Click on legend labels to turn their traces on and off