This is about half of New Zealand's total production and 70% of coal production for domestic consumption. Waikato coal is vital to several key industries, and because of the scale of these users, to New Zealand's energy security.
Waikato coal, especially from the northen part of the region, is a high quality thermal coal. Coals cover the full sub-bituminous rank range, from sub-bituminous C in the Tihiroa, Kawhia, Waikare and Maramarua fields, to sub-bituminous A in Glen Massey, Rotowaro, Huntly and Pukekawa fields. Coals in the north of the region generally have low to medium ash and low sulphur contents, whereas those in the south have medium to high ash and sulphur contents.