PFAS in Fontaine-sous-Jouy's tap water: 3 ng/L, 6x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
6× above our health benchmark
0.5 ng/L is our benchmark, not an official limit. Same EFSA method as Sweden, Denmark and the Netherlands, but stricter. It's a yearly average, compared here with the latest check.
More about this result
The US also limits PFOA and PFOS to 4 ng/L each, per substance.
Substances below the detection limit count as 0, so the real total may be higher.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
More PFAS than in 88% of the cities we track
checked on 26 February 2025
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Perfluorohexane sulfonate (PFHXS) | 0.003 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,0050 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,0010 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,0020 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,0010 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,0010 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,0050 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,0020 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0020 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0010 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,0050 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0020 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0020 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0010 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,0020 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,0020 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,0010 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0010 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,0050 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,0010 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 3 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 26 February 2025
- Water supplier
- CA EVREUX PORTES DE NORMANDIE
In Fontaine-sous-Jouy, the 4 most closely watched PFAS (PFAS-4) add up to 3 ng/L (0.003 µg/L) at the latest PFAS check on 26 February 2025. That's 6 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 3 ng/L (0.003 µg/L), below the EU legal limit (100 ng/L). Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Fontaine-sous-Jouy
A single PFAS check has been published for Fontaine-sous-Jouy so far (26 February 2025). A history will build up with the next checks; this page is refreshed weekly.
What the latest check found
At the latest check, the water was within every limit tested.
Values to watch
These results are close to their legal limit, or over it.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 29.3 mg/L | ≤ 50 mg/L | within the limit |
See all 20 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 29.3 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 3.1 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.016 mg/L | ≤ 2 mg/L | within the limit |
| Nickel | <1 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | <0,50 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,10 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <0,50 µg/L | ≤ 50 µg/L | within the limit |
| Fluoride | 0.17 mg/L | ≤ 1.5 mg/L | within the limit |
| Escherichia coli | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| Enterococci | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| Coliform bacteria | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| pH | 7.4 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 30.4 °f | no limit | for reference |
| Electrical conductivity | 615 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 25.8 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 17.8 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 13.2 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <5,0 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Fontaine-sous-Jouy safe to drink?
Yes. At the check on 15 June 2026, the tap water in Fontaine-sous-Jouy was within every limit tested. “Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.”
How high are PFAS levels in Fontaine-sous-Jouy's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 3 ng/L. The EU limit is 100 ng/L, so this water is at 3 % of the limit. (below the EU limit)
Does the water in Fontaine-sous-Jouy also meet the strictest limits in Europe?
Yes. Even against Europe's strictest legal limit, Sweden's 4 ng/L in force since 2026, the measured value of 3 ng/L stays below.
How hard is the water in Fontaine-sous-Jouy?
The water hardness in Fontaine-sous-Jouy is 30.4 °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 12 September 2026.
Same water network
Same distribution network as Fontaine-sous-Jouy, so in principle the same water.
Nearby communes
The closest to Fontaine-sous-Jouy on this site.
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=27254
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- FONTAINE SOUS JOUY
Water report for Fontaine-sous-Jouy
Get new PFAS results for Fontaine-sous-Jouy, with a short explanation. At most one update a week, only when there's something new.
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.