Complex sentence: The District treats ground water from the Alluvial Aquifer and is the only water utility in Pulaski County that uses ground water; all other utilities in the county use treated surface water from two lakes owned by Central Arkansas Water.
Split into simpler sentences: The District treats ground water from the Alluvial Aquifer and is the only water utility in Pulaski County that relies on ground water. All other utilities in the county use surface water from two reservoirs tapped by Central Arkansas Water.