The ANZECC/ARMCANZ (2000) derivation of an ammonia water
quality guideline is based on data from 21 estuarine and marine
species. Data from an additional 38 species were obtained following
a literature search (Table 1). Marine or estuarine data, but not
freshwater data, were used and these were required to have measured
concentrations of unionised or total ammonia. Endpoints
could be either acute or chronic, expressed as LC50s, EC50s or NOECs.
Water pH needed to be near 8, and salinity 25–35‰, with the
temperature recorded. Appropriate quality control (QA/QC) and
statistical analysis was also required