Richmond Water Laboratories are accredited by the National Association of Testing Authorities, Australia (NATA) for over 60 individual water, wastewater and soil analytes, including sampling. A condition of this accreditation is that RWL methods and processes are independently audited, allowing greater assurance in the integrity and reliability of results. A full list of the methods for which RWL is NATA accredited can be found at the following links.
Chemistry
Biology
Rainwater Tanks
While it makes sense to harvest the clean, purified water which falls out of the sky, there are a number of factors which can compromise the quality of this water. The following fact sheet from the NSW Department of Health may be useful for maintaining rainwater tanks