This publication provides introductory technical guidance for mechanical engineers, civil engineers and other professional engineers and construction managers interested in water desalination. Here is what is discussed: 1. SITE SELECTION 2. WATER SOURCE SELECTION 3. PROCESS SELECTION 4. PRETREATMENT CONSIDERATIONS 5. DISTILLATION/CONDENSATION TECHNIQUES 6. MEMBRANE TECHNIQUES 7. ION EXCHANGE TECHNIQUES 8. POST-TREATMENT AND WASTE DISPOSAL.