Intentional aquifer recharge2 (Dillon, 2004) can result from different techniques (Tuinhof and Heederik, 2003) among which aquifer storage and recovery (injection of water into a well for storage and recovery in the same well) or infiltration ponds (ponds constructed off-stream where surface water is diverted and allowed to infiltrate to the underlying unconfined aquifer). For small volumes of water, aquifer recharge can be more economical than building storage dams that might lead to significant evaporation losses in arid countries. Many alternative water supply options have been developed in different parts of the world. Indirect wastewater re-use involves the mixing of reclaimed wastewater with another water supply source before re-use.