Also, a list of manufacturers and suppliers of water conservation and other energy savers should be made available so that visitors can take it home and use it in their everyday lifestyles. A nice touch would be a reusable or recyclable card to departing visitors reiterating management's pledge to the environment and offering a tangible object of this pledge such as a faucet aerator. Extreme efforts should be made to protect existing and potential groundwater sources from contamination. This type of system has so many advantages from both an environmental and economical perspective that the source can be developed up to several miles from the final use point. Fresh surface water can be used when groundwater is not available.
Some locations have an abundance of fresh surface water such as streams, rivers, and lakes.
Lack of Groundwater or Surface Water . In those cases where there is a lack of water, rain catchment becomes an option as a stand-alone supply of water or a supplement to a limited ground or surface supply. Rainfall catchment from the roofs of structures is a recognized option for water supply, provided the necessary treatment processes are used prior to distribution. Metal roofs may release heavy metals into the drinking water if the rainwater is acidic. Extraction of Freshwater from Sea Water, Brackish Water, or Water Vapor in the Air .