Saint-Denis
Tap water in Saint-Denis is medium risk. Generally fine, but a few tests failed this year.
Is it safe?
Franciliane
Medium risk
Generally fine, but a few tests failed this year
99.5% of bacterial tests passed and 99.3% of chemical tests passed, from 738 samples.
Supplied by Franciliane.
Tests over a limit this year: Chlorate, Enterococci bacteria, Nickel, E. coli bacteria.
Hardness: Hard (28 °f).
Source
French Ministry of Health drinking water checks (data.gouv.fr).
Period covered: January to September 2026.
Covers communes of roughly 1,000 people or more. Ratings weigh how many bacterial and chemical tests passed. A single failed test does not by itself lower a rating. Hardness is the median measured this year, in French degrees.
Common questions
Can I drink the tap water in Saint-Denis, Île-de-France?
Tap water in Saint-Denis is medium risk. Generally fine, but a few tests failed this year.
Where do these ratings come from?
French Ministry of Health drinking water checks (data.gouv.fr). Period covered: January to September 2026.