Frustrations and concerns are growing among downtown Wimberley business owners as they wait for the city to receive approval for changes in its wastewater system plans. 

That, combined with plans for third-party Aqua Texas to operate a proposed wastewater treatment plant, leaves some residents to worry about the project and when it could come to fruition. 

Four months ago, Wimberley city leaders terminated plans with Black Castle for a city-owned wastewater plant; city leaders opted for a wastew...