The Department of Environment and Science has confirmed it will investigate Adani after water from the north Queensland floods spilt from the Abbot Point coal port last week into wetlands.

The department's test results came back on Wednesday and showed the level of "total suspended solids" - the volume of debris such as soil, plant material or dust - in the water was 33mg/L.

An aerial image taken on Saturday, February 9 shows discoloured water in settlement ponds (left foreground) and in the Caley Valley wetlands (right foreground). Credit:Gary Farr - Supplied

Adani said on Tuesday the level of total suspended solids was 58mg/L, according to the separate test it commissioned. The authorised maximum level according to the company's licence is only 30mg/L.

Adani did not apply for a temporary licence to exceed its total suspended solids limit.