> For the complete documentation index, see [llms.txt](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-4/4.-leaching.md).

# 4. Leaching

- [4.1: Metal and metalloid chemicals leaching from plumbing products](https://guidelines.nhmrc.gov.au/australian-drinking-water-guidelines/part-4/4.-leaching/4.1-metal-and-metalloid-chemicals-leaching-from-plumbing-products.md): (endorsed 2025)