A shallow peat lake, also known as Lake D, in the Kainui peat bog in the Horsham Downs area, north of Hamilton, at 421A Lake Road. The water is brown, like tea, because of the peat. The lake is managed for conservation by the Lake Kainui Landcare Group, which has done so since 1966, and fencing and plantings around the edge aim to reduce sediment and improve water quality. The website says the lake has regular cyanobacterial blooms and invasive fish species, and that it has important ecological values. The Our Lakes, Our Future research team, which works on lake health, is listed with a phone number on the site, +64 3 548 2319.