Scanner Radio Audio Streams and Frequency Database for
Humboldt, Mendocino, and Trinity Counties
on the North Coast of California.

Scanner radio NEW and IMPROVED SCANNER RADIO AUDIO STREAMS!
Try these links or players and choose the one that works for you.
They all get the same stream.
If the SHOUTcast server is full, use the RadioReference player.
  • iTunes  1  2

  • Java player (Linux, Solaris)

  • Real Player  1  2

  • WinAmp  1  2

  • Windows Media Player  1  2

Streams are also available from these broadcasters:


Click To Tune-In with your media player


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If you have any difficulties in receiving a stream, please send us an email and we will attempt to help you. Technical information for this scanner radio and its broadcasting methods is at the bottom of this page.

This scanner monitors all first-responder frequencies listed below (Law Enforcement, Fire, Ambulance and Coast Guard) and some others. There are many more active frequencies on the North Coast, and if you are searching for North Coast California frequencies to program into your own scanner, an excellent resource is http://harrymarnell.net/. That site also supplies the scanner feed for Humboldt County north of Eureka.

Our scanner monitors several frequencies used by pilots at local airports. These airports are all uncontrolled, meaning they have no tower nor a traffic controller. Pilots announce their locations and landing intentions over the air to keep track of each other. Depending on the aircraft's altitude, you may hear aircraft transmissions from as far away as the Arcata Airport, nearly 30 miles to the north. If you are interested in sport aviation, please visit our web site NorthCoastAviation.com which showcases webcams installed at nearby airports.  

Update, 9/2011  The audio output from the scanner is now being fed to a Barix Instreamer, a dedicated IP Enabled Audio Encoder (client streaming appliance). More information

Update, 2013  We replaced the old warhorse Radio Shack PRO2041 scanner with the GRE PSR-600. Because this radio is so sensitive we moved the antenna to a less noisier location, moved the radio out of the network closet, and ran new antenna cables.

These listings may be sorted by clicking on the headings.

Name    Type    Frequency    Base of operations   
Arcata Fire Department fire, medical 154.130 Arcata and McKinleyville
Arcata Police Department law enforcement 155.430 Arcata
CALCORD law enforcement 156.075 State wide
CALTRANS District 1 public works 47.200 Eureka District
CLEMARS law enforcement 154.920 State wide
California Department of Forestry fire (CalFire), emergency dispatch, medical 151.250 Humboldt County
California Department of Forestry fire, emergency dispatch, medical 151.385 Mendocino County
California Fish & Game law enforcement 151.415 North Coast
California Highway Patrol law enforcement 42.180 through
42.540
Humboldt County
California Highway Patrol mobile extenders law enforcement 154.905 Humboldt County
Carlotta Fire Department fire, medical 154.010 Carlotta
Eureka Police Department law enforcement 154.325 Eureka
Fairhaven Fire Department fire, medical 154.400 Samoa Peninsula
Ferndale Fire Department fire, medical 154.175 Ferndale
Ferndale Police Department (Fortuna dispatch) law enforcement 155.250 Ferndale
Fortuna Fire Department fire, medical 154.235 Fortuna, Hydesville
Fortuna Police Department law enforcement 155.250 Fortuna
Humboldt County MCI Channel emergency services 460.350 Humboldt County
Humboldt County Public Works public works 153.905 Humboldt County
Humboldt County Fire Dispatch fire, medical 154.07 Humboldt County
Humboldt County Sheriff law enforcement 155.070 Humboldt County
Humboldt County Sheriff Main Channel law enforcement 154.740 Humboldt County
International Space Station, Ham Radio telemetry bursts 145.800 When overhead
Loleta Fire Department fire, medical 154.010 Loleta
Marine Channel 16, distress and hailing communication 156.800 Marine
Marine Channel 22a communication 157.100 Marine
Marine Channel 83 communication 157.175 Marine
MedNet - Fortuna Dispatch medical 462.950 Fortuna
MedNet - Redwood Memorial Hospital medical 463.000 Fortuna
NALEMARS law enforcement 155.475 Statewide
OES and Fire Mutual Aid "White" fire, emergency services 154.280 Humboldt County
Rio Dell Fire Department fire, medical 153.770 Rio Dell
Rio Dell Police Department (Fortuna dispatch) law enforcement 155.250 Rio Dell
Rohnerville Airport CTAF airport operations UNICOM 122.900 Fortuna
Rohnerville CDF Air Tanker Base fire, airport operations 123.975 Fortuna
Scotia Fire Department fire, medical 153.320 Scotia
Six Rivers National Forest fire, emergency, admin 168.725 Northern Cal
 

Technical Information

This scanner has been available on the net since right after broadband arrived in this area in early 2004. The stream was originally served up directly from the network's server. Our local network generally had enough bandwidth then to satisfy up to 16 simultaneous connections. For a number of years this was sufficient, but that had to change after the large local earthquake of January 2010 when many hundreds of listeners from all over the world were attempting to connect and were disappointed upon receiving "Server Full" responses.

In Fall 2010 the audio stream was moved to our SHOUTcast server located in Los Angeles, tripling our capacity. At the end of that year we also added the broadcaster RadioReference.com. By utilizing these two services we are able to supply unlimited connections. This was very ably proved the following spring when the Japanese tsunami arrived on the West Coast and the two audio servers supplied hundreds of connections during that incident. One of our web servers which hosted the local webcam image monitoring the Eel River was also tested during the tsunami's arrival, serving up that webcam image 310,000 times that day. It didn't even break a sweat.

This scanner radio is located near the Rohnerville Airport in Fortuna, on the rugged and beautiful North Coast of California, at approximately 200 feet elevation. This location provides line of sight to all of Fortuna and to most of the Eel River delta. It has excellent reception of all North Coast mountaintop repeaters. The antenna is a vertical VHF collinear about ten feet long, mounted at the top of a short mast.

The current scanner is a GRE PSR600. Its audio is fed into a Barix Instreamer which processes and formats it into a digital stream. The digitized bits are then wrapped inside packets and streamed to the SHOUTcast server in Los Angeles and also to the Radio Reference service. Each listener gets an individual stream from these servers. The processing and buffering adds a delay, so if you're local and hear the sirens, you may still be able to hear the original dispatch!

If you are a local Humboldt County listener, those packets come back up on the same fiber optic line that we use to send them down to the servers. To get to you they take a round trip of about 1,500 miles, which takes about a hundredth of a second at the speed of light.

If you have a scanner and are contemplating providing a similar stream, do yourself a huge favor and use the no-hassle Barix Instreamer to make it available on the Interwebs. This device is used by radio studios to send the audio to the transmitters, and we've also installed it in churches to send the soundboard audio to listeners. This dedicated device is the size of a box of kitchen matches, and after programming needs absolutely no attention. It uses only a few watts of power. Compared to the cost of operating a 24/7 computer, the power savings over the years has covered its cost, and its use is continuing to keep a little bit more CO² out of the environment.

The weather data on this page comes from our local Davis weather station, and we also provide and maintain several dozen webcam images.

Want your own scanner? Visit Scanner Master, the nations oldest and largest scanner-only dealer. Over 30 years of experience in the scanner industry, and they will even program your scanner for you! View the catalog.

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