Reusing water is one of the most cost-effective, environmentally sound and sustainable methods of water supply that there is. Castle Rock is diversifying its sources to ensure a strong water future. We currently get water from underground aquifers and our local East Plum Creek. Reuse water will allow these sources to recharge. We also import water, and while it is a great supply, this is expensive. The cost for reuse water is considerably less than many other sources. Reuse water will make up about 1/3 of all water supply for the Town beginning in 2020.