Unfortunately, the AQMD site is down. If even the US .gov websites do not work when I need them…
The sensor in this system is probably a chinese stuff as well and probably not RH corrected.
The accuracy issue with RH is mostly a merchant of doubt technique…
SC produce the raw data.
We could/should implement an humidity correction on the map but it will start long debates about which one etc.
The RIVM in Holland is developing a correction algorithm which spreads among the low cost sensors but it is still not public. But actully it can be seen on their map.