Groundwater naturally contains salts and minerals and varies in quantity and quality in different areas.
These levels are measured as TDS (Total Dissolved Solids). Some examples of salt levels per litre for your information:
The majority of the bores on the Mornington Peninsula produce groundwater with 200 to 1200 TDS per litre, but levels can be higher in certain areas.
Plants have varying tolerance to salinity in groundwater e.g. Delicate plants such as roses will not tolerate a high TDS level (over 700 TDS). Lawns and native plants are more tolerant.
Total Dissolved Solids Guide
For your information, the table below lists a general guide of TDS levels per litre of Groundwater and uses.