Drinking water quality in Saint-Denis
PFAS in drinking water
The total of 20 PFAS ("forever chemicals") was last measured at <0,005 µg/L. The EU limit is 0.1 µg/L, so this water is at 0 % of the limit. (16 March 2026)
This source does not list each PFAS substance separately, so we cannot compare this water with the health limit.
3 PFAS (see each substance)
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,002 µg/L |
Water report for Saint-Denis
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Official assessment
The authorities have not published an overall verdict for this water.
„Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.“
Show all 17 official measurements
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 19.5 mg/L | ≤ 50 mg/L | within limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within limit |
| Lead | <0,1 µg/L | ≤ 10 µg/L | within limit |
| Copper | 0.0029 mg(Cu)/L | ≤ 2 mg(Cu)/L | within limit |
| Nickel | 0.5 µg/L | ≤ 20 µg/L | within limit |
| Chromium | <6,00 µg/L | ≤ 50 µg/L | within limit |
| Uranium | 0.55 µg/L | ≤ 30 µg/L | within limit |
| Fluoride | 0.15 mg/L | ≤ 1.5 mg/L | within limit |
| Escherichia coli | <1 n/(100mL) | ≤ 0 mL) | within limit |
| Enterococci | <1 n/(100mL) | ≤ 0 mL) | within limit |
| Coliform bacteria | <1 n/(100mL) | ≤ 0 mL) | within limit |
| pH | 7.7 unité pH | 6.5–9 unité pH | within limit |
| Water hardness | 30.9 °f | no limit | informational |
| Electrical conductivity | 644 µS/cm | 200–1,100 µS/cm | within limit |
| Chloride | 29.7 mg/L | ≤ 250 mg/L | within limit |
| Sulphate | 65.4 mg/L | ≤ 250 mg/L | within limit |
| Turbidity | <0,10 NFU | ≤ 2 NFU | within limit |
Frequently asked questions
Is tap water in Saint-Denis safe to drink?
All the values shown here (15 June 2026) are within the legal limits, but the authorities have not published an overall verdict for this water.
How high are PFAS levels in Saint-Denis's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at <0,005 µg/L. The EU limit is 0.1 µg/L, so this water is at 0 % of the limit. (below the EU limit)
How hard is the water in Saint-Denis?
The water hardness in Saint-Denis is 30.9 °f (hard). This mainly matters for household appliances and detergent dosing, not for health.
Where does this data come from?
All values come from official publications: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM). Retrieved on 28 August 2026.
Data source
- Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM)
- https://hubeau.eaufrance.fr/api/v1/qualite_eau_potable/resultats_dis?code_commune=93066
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 August 2026
- Supply networks
- UDI SEDIF NEUILLY, UDI SEDIF MERY
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.