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Nitrate Guidelines Values in ANZECC 2000

Publication date:  September 2002
Publication reference number:  No number

This document investigates the basis of the nitrate trigger values and provides recalculated trigger values.

There has been some uncertainty associated with the nitrate trigger values as given in Table 3.4.1 of the ANZECC 2000 water quality guidelines. These trigger values indicate that for 95 per cent protection the toxicity of nitrate is higher than for ammonia (a previously more toxic toxin) and markedly higher for 99 per cent protection (by 19-times).