Mchenry County, Illinois: Police Scanner Guide
Most police and sheriff agencies in Mchenry County have gone encrypted. You can still monitor fire, EMS, weather broadcasts, and any remaining unencrypted channels.
What You Can Still Monitor in Mchenry County
- Fire dispatch — most fire departments stay on open radio even when police go encrypted
- EMS / ambulance dispatch — emergency medical services often remain unencrypted for interoperability
- NOAA Weather Radio — direct NWS broadcasts on 162.400–162.550 MHz
- Public works & utilities — city maintenance, road crews, and utilities typically unencrypted
Recommended Scanners for Mchenry County
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Agencies in Mchenry County
Data from the RadioReference database and direct verification. View all Illinois agencies →
| Agency | Type | Encryption |
|---|---|---|
| Algonquin-Lake in the Hills Fire Protection District | fire | P25 AES-256 |
| Crystal Lake Fire Protection District | fire | P25 AES-256 |
| Huntley Fire Protection District | fire | P25 AES-256 |
| McHenry County Sheriff | sheriff | P25 AES-256 |
| McHenry Government | other | P25 AES-256 |
| McHenry Fire/EMS | fire | P25 AES-256 |
| McHenry County - North East Regional Communications Center | sheriff | P25 AES-256 |
| McHenry County - Southeast Emergency Communications Center | sheriff | Unknown |
Frequently Asked Questions
What can I monitor in Mchenry County, Illinois?
Most police and sheriff agencies in Mchenry County have gone encrypted. You can still monitor fire, EMS, weather broadcasts, and any remaining unencrypted channels. Check the local fire and EMS frequencies which often remain unencrypted even when police go encrypted.
Is police radio encrypted in Mchenry County?
Yes — 1 out of 8 agencies in Mchenry County use full encryption. An additional 7 use partial encryption. Fire and EMS frequently remain unencrypted.
What scanner do I need for Mchenry County?
For Mchenry County, we recommend a scanner that covers VHF and UHF frequencies for fire, EMS, and weather — the Uniden BC125AT is the best value. For broader exploration, the RTL-SDR V4 with free SDRTrunk software can scan the full spectrum.