City of Alton
Hidalgo, Texas
How we verified this
As of August 2026 RadioReference flags the sole Alton Police talkgroup (Police Dispatch) on the Lower Rio Grande Valley Regional Radio System as fully encrypted, while Alton Fire and city services talkgroups are listed in the clear.
Encryption Details
Verified Talkgroup Data
Hidalgo County Context
City of Alton isn't an outlier here: 7 of the 10 public-safety agencies we track in Hidalgo County are fully encrypted (70%), so most departments nearby have made the same move.
See every agency we track in Hidalgo County → County encryption overview →
What This Means
There is no partial access here: routine dispatch is encrypted alongside everything else, so a scanner picks up nothing from this agency at all.
Frequently Asked Questions
Is City of Alton radio encrypted?
Yes — City of Alton's radio system runs on P25 AES-256 encryption. There is no partial access here: routine dispatch is encrypted alongside everything else, so a scanner picks up nothing from this agency at all.
Can I listen to City of Alton on a police scanner?
No. City of Alton has fully encrypted their radio communications using P25 AES-256. No consumer scanner can decode encrypted transmissions.
Why did City of Alton encrypt their radio?
Officer safety and operational security are the reasons agencies give. What rarely comes with that explanation is Hidalgo County-specific evidence that open communications ever caused a problem, while the loss of public oversight and the friction with still-unencrypted neighboring agencies are both immediate and real.
Can Hidalgo County reverse the encryption decision?
Yes. Whoever made this call for City of Alton can also unmake it; there's no technical lock-in. The approach that has worked elsewhere combines public-records requests, direct council pressure, and a coordinated local coalition.
What can I do about City of Alton encryption?
Ask for the paperwork first — the policy that authorised encryption for City of Alton, and the recordings themselves — because a specific request is harder to wave away than a general complaint. Then take what you learn to a council meeting, and bring others from Hidalgo County with you.