NotifyJoCo is brought to you by a partnership among the County, WaterOne, and participating cities. Check out the <a href="/partners-and-jurisdictions">Partners</a> 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.