Notify JoCo logo for Johnson County's mass notification system

What I need to know. When I need to know it.

 
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Which cities are participating in the NotifyJoCo system?

NotifyJoCo is brought to you by a partnership among the county, WaterOne and participating cities. Check out the Partners page to see if your city is participating. NOTE: Johnson County residents will automatically receive county-wide emergency alerts. WaterOne customers will automatically receive emergency alerts. If the location you desire to receive alerts about is located within a non-participating city, city-wide alerts will not be available through NotifyJoCo for this jurisdiction.