Drinking water quality in Le Chesnay-Rocquencourt
PFAS in drinking water
No PFAS results have been published for Le Chesnay-Rocquencourt yet. Testing has been required across the EU since January 2026. We will show the values here as soon as they come out.
"Not published" does not mean "not present". Without test results, no one can say how much PFAS is in this water.
Water report for Le Chesnay-Rocquencourt
Get the free water report for Le Chesnay-Rocquencourt, plus an alert whenever new official results are published.
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 14 official measurements
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 21 mg/L | ≤ 50 mg/L | within limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within limit |
| Chromium | <5 µg/L | ≤ 50 µg/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 | 23.7 °f | no limit | informational |
| Electrical conductivity | 555 µS/cm | 200–1,100 µS/cm | within limit |
| Chloride | 31.1 mg/L | ≤ 250 mg/L | within limit |
| Sulphate | 40.2 mg/L | ≤ 250 mg/L | within limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within limit |
Frequently asked questions
Is tap water in Le Chesnay-Rocquencourt safe to drink?
All the values shown here (12 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 Le Chesnay-Rocquencourt's drinking water?
No PFAS results have been published for Le Chesnay-Rocquencourt yet. Testing has been required across the EU since January 2026. We will show the values here as soon as they come out.
How hard is the water in Le Chesnay-Rocquencourt?
The water hardness in Le Chesnay-Rocquencourt is 23.7 °f (medium). 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=78158
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 August 2026
- Supply networks
- VERSAILLES
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.