We see this spike in PM also in Anthony.
But not on the west mesa of Las Cruces
I think this was more of a valley wide event rather than one impacting the region. The west mesa is higher in elevation and a distance from the valley. You can see a splike in PM a little bit at the Sunland Park City Yard site but it only peaked around 120 µg/m3 there. Also winds were a bit higher there, probably ventilating out the pollutants.