The Australian Drinking Water Guidelines are NHMRC-endorsed national guidance for drinking-water quality management in Australia. Version 4.0 was updated in June 2025 and includes health-based guideline values for antimony, arsenic, cadmium, chromium, lead, mercury, nickel, and uranium, plus an aesthetic guideline for acid-soluble aluminium. Chromium is recorded as Cr-VI because the fact sheet states the guideline for hexavalent chromium, with total chromium used as a trigger for separate speciation analysis. Uranium is documented on the regulation page but gap-logged rather than loaded because U is outside the current regulatory_limits.csv metal-species vocabulary. Controlled-vocabulary values from this source are captured in the structured evidence record and documented at Australia NHMRC Drinking Water Guidelines - heavy-metal values.
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