nostr:npub18kne9vvc5y5f66xt20csfcdzqeqqkczfcnazm5utynrhrpw6sa5sg2dm0v The PurpleAir map uses sensors anyone can deploy, so if it doesn’t show the right value for you, you can always buy a sensor and plop it in your yard, and then all your neighbors will have better information. https://map.purpleair.com/
The sensor is $229 (plus an outdoor power supply). https://www2.purpleair.com/products/purpleair-pa-ii