Which of the following is an example of nonpotable water that can be effectively used...

Dechlorinated swimming-pool water can be reused for landscape irrigation when its chemical quality, salinity, pH, local regulations, and plant tolerances have been evaluated. Reusing this water prevents an existing nonpotable source from being discharged while reducing demand for potable irrigation water. Well water from a private borehole is generally groundwater and is not automatically treated as an alternative water source merely because it is privately supplied; it may also be potable. Street runoff collected directly from storm drains can contain hydrocarbons, metals, sediment, pathogens, salts, and other pollutants and should not be applied directly without suitable collection and treatment. Therefore, properly dechlorinated pool water is the most appropriate listed source for safe and effective landscape irrigation.

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