El Salvador Browse regions with water & wastewater management location pages. Ahuachapán 12 cities Cabañas 5 cities Chalatenango 9 cities Cuscatlán 10 cities La Libertad 19 cities La Paz 7 cities La Unión 8 cities Morazán 8 cities San Miguel 12 cities San Salvador 18 cities San Vicente 5 cities Santa Ana 9 cities Sonsonate 14 cities Usulután 14 cities