Agriculture is one of the major users of fresh water globally. While aquaponics offers a water-efficient method for both aquaculture and hydroponics, in a previous survey of 809 aquaponics operations, 90% of respondents used drinking water (community piped water or well water) as their water source for aquaponics (Love et al., 2014). In the survey, however, some respondents (39%) used rainwater to supplement potable water use (Love et al., 2014) indicating that they may be willing to use other biosecure water sources. For aquaponics to become more ecologically sustainable, aquaponic system operators and designers should be encouraged to make full utilization of available rainwater.