USA Alarm Systems Inc, based in Monrovia, California, helps protect homes, businesses, schools, and universities across Southern California with integrated security and fire systems. Our services include intrusion alarms, 24/7 monitoring, video surveillance, access control, and fire alarm solutions—designed, installed, and supported by an experienced team.
This company provided alarm service to my mother-in-law for many years. They answer their phone, they are very responsive and extraordinarily helpful. If you want an honest company with good people, this is it for sure.
January 2025
We have used USA for years and they have always given great service and their crew is the best!
December 2024
I have been a client for 30 plus years, always professional, and on budget. I highly recommend USA Alarm Systems.
