Rooftop Rainwater Harvesting for Plant Irrigation II: Water Quality and Horticultural Considerations
Rainwater harvesting at privately owned businesses and
farms is primarily used for reducing runoff during rain
events and to conserve potable water resources. Collected
water is often used for supplemental ornamental plant
irrigation, for which purpose it is generally suitable.
While most collected rainwater could be treated and
disinfected to make it of potable quality, in New Jersey
collected rainwater typically cannot be used legally in
public or non-public water systems (NJDEP 2004b).
This publication does not address all the considerations
that would be necessary for using harvest rainwater as a
potable water source.