PFAS in Saint-Étienne-des-Guérets's tap water: 0.6 ng/L, 1.2x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
1.2× 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.
Sample taken in Saint-Nicolas-des-Motets, on the same distribution network as Saint-Étienne-des-Guérets (ST NICOLAS DES MOTETS). The health authority samples one tap per network; a network carries the same treated water everywhere.
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 81% of the cities we track
checked on 18 November 2025
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoro-nonanoïque (PFNA) | 0.0006 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0015 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0015 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,0005 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0015 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,0015 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,0005 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,0005 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0015 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,0015 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0015 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0015 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 0.6 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 18 November 2025
- Water supplier
- SAUR SECTEUR DU LOIR ET CHER
In Saint-Étienne-des-Guérets, the 4 most closely watched PFAS (PFAS-4) add up to 0.6 ng/L (0.0006 µg/L) at the latest PFAS check on 18 November 2025. That's 1.2 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 0.6 ng/L (0.0006 µg/L), below the EU legal limit (100 ng/L). Sampled in Saint-Nicolas-des-Motets, on the same network. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Saint-Étienne-des-Guérets
A single PFAS check has been published for Saint-Étienne-des-Guérets so far (18 November 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.
See all 17 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 1.7 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <2 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.021 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <5 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <5 µg/L | ≤ 50 µg/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 | 7.9 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 12.2 °f | no limit | for reference |
| Electrical conductivity | 562 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 24.8 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 25.5 mg/L | ≤ 250 mg/L | within the limit |
| Iron | 11 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Saint-Étienne-des-Guérets safe to drink?
Yes. At the check on 2 April 2026, the tap water in Saint-Étienne-des-Guérets 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 Saint-Étienne-des-Guérets's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 0.6 ng/L. The EU limit is 100 ng/L, so this water is at 0.6 % of the limit. (below the EU limit)
Does the water in Saint-Étienne-des-Guérets 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 0.6 ng/L stays below.
How hard is the water in Saint-Étienne-des-Guérets?
The water hardness in Saint-Étienne-des-Guérets is 12.2 °f (soft). 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 Saint-Étienne-des-Guérets, so in principle the same water.
Nearby communes
The closest to Saint-Étienne-des-Guérets 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=41208
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- ST NICOLAS DES MOTETS, ST CYR DU GAULT_ST ETIENNE DES GUERETS
Water report for Saint-Étienne-des-Guérets
Get new PFAS results for Saint-Étienne-des-Guérets, 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.