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Rated 2.5 out of 5
2.5 out of 5 stars (based on 2 reviews)
Very good50%
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An air quality monitoring network built on a new generation of “Internet of Things” sensors.

Rated 1.0 out of 5
15/06/2023 To me they seem like a company who sells products and their map is secondary. They even advertise their stuff on the map itself.

Rated 4.0 out of 5

“PurpleAir is built on the ideal of sharing data and by doing this, empowering individuals to effect change. All public PurpleAir data is available to download under various licenses from private, not for profit use to educational and commercial use. The common element between these uses is to share attribution.” ( – based on that maybe 4/5 blocks would be accurate. There do not seem to be any trackers or advertisements on the site.

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