Grez-sur-Loing
No. Tap water in Grez-sur-Loing is high risk. Several tests failed: check local advice before drinking.
Is it safe?
Veolia - Gie Ile de France
High risk
Several tests failed: check local advice before drinking
100% of bacterial tests passed and 70% of chemical tests passed, from 10 samples.
Supplied by Veolia - Gie Ile de France.
Tests over a limit this year: Pesticide residue (chloridazon).
Hardness: Hard (28.4 °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 Grez-sur-Loing, Île-de-France?
No. Tap water in Grez-sur-Loing is high risk. Several tests failed: check local advice before drinking.
Where do these ratings come from?
French Ministry of Health drinking water checks (data.gouv.fr). Period covered: January to September 2026.