More challenging than harvesting rainwater off a clean roof surface, harvesting and treating stormwater to make it safe for spray irrigation requires special consideration along the entire treatment train.  Run-off can include hydrocarbons, nitrates, organic matter and animal waste. Treated water would need to be clean, clear and free from harmful pathogens.  The Park Service was insistent that the harvesting equipment not interfere with the sightlines of the park.


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