← Back to all waters

Disinfectant by-product
N-Nitrosodimethylamine
N-Nitrosodimethylamine (NDMA) is a chemical classified as a probable human carcinogen, commonly found as a contaminant in some industrial processes and contaminated food or pharmaceuticals. It is not a food ingredient but a toxic contaminant with significant health risks when ingested, inhaled, or absorbed.
Tracked contaminantUpdated Feb 22, 2025
Health score-5.0
-5Very bad5
Water guidelines
- Legal limit
- 7e-10 ppm
- Health guideline
- 3e-9 ppm
Food and supplement guidelines
- Legal limit
- Not specified
- Health guideline
- Not specified
Risks
Carcinogenicity, liver toxicity, genotoxicity, mutagenicity, possible cancer risk at very low exposure levels
Benefits
None