[1] The mean flow of water downstream at Clevedon is 2.6 m3 (570 imp gal)/s,[2] but can vary greatly, as illustrated in photographs showing the falls in winter and summer.

The Wairoa River falls over a basalt lava plug which has intruded up a fault line.

Volcanic tuff rings and lava bombs are visible in the east wall of the waterfall.

[3] Several herbs have been identified near the falls - water starwort (Callitriche petriei), Crassula hunua, water pennywort (Hydrocotyle microphylla and Hydrocotyle hydrophila), wood-sorrel (Oxalis magellanica).

You can help Wikipedia by expanding it.This Auckland Region-related geography article is a stub.