"To fulfil these obligations, we are required to register all sites that are potentially contaminated. This doesn't mean their land is contaminated, just that it might be.
"Overall this won't affect land owners unless they plan to repurpose the land in the future. If this happens we would want to ensure the land was suitable and safe for this new purpose and the site would need to be investigated", said Ms Joss.
Landowners will receive a letter, site report outlining the information held on their site as well as a frequent questions and answers sheet.
Landowners will have a month to respond if they disagree with the information contained within the report. Once the landowner and the Regional Council have agreed the information is correct, this record will from part of the Land Information Memorandum for the site.