Free air for tires in Socorro

I found out two stations so far.

New Mexico Tech. campus police building has free air station and has a tire pressure measuring gauge. They also have free water to clean the windshields or tires. The second free air filling station is in the Philips 66 gas station on California Street, just before the I25 ramp. They do not have any measuring gauge though. But, it is faster to inflate the tire using their pump.

It is always better to just pay $0.25 and get the tires checked at Chevron or Diamond Shamrock. Even better, it is free if you fill your gas at their stations.