Edit: Site finally loaded (HN HoD), is this actually a decentralized monitoring program? From reading, it kinda sounds like it's just for your own monitoring rather than aggregating the data to give a broader picture across the globe.
We have a professional sensor but also the open source/open hardware version that can be connected to our platform.
Alternatively you can send the data to any other platform or use it as an offline monitor. There are many citizen science projects that have open API's that you could send data to.
Monitoring household/office/school indoor air quality seems to be a relatively new trend, but the impact of indoor air quality is actually quite strong so it makes sense.