PFAS in Thésée's tap water: under 12 ng/L, none of the four main PFAS detected
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
No PFAS detected
The lab sees nothing below 12 ng/L, 24 times our benchmark of 0.5 ng/L. Water above our benchmark would pass this check unnoticed.
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 Monthou-sur-Cher, on the same distribution network as Thésée (MONTHOU SUR CHER). 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.
The lab detects each of the four substances from 2 to 4 ng/L upward. None reached that limit, so their total is below 12 ng/L rather than zero.
checked on 19 March 2025
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoroheptane sulfonique (PFHpS) | <0,004 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,010 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,004 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,020 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,010 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,002 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,004 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,010 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,004 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,004 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,002 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,004 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,002 µg/L |
None found. The lab sees nothing below 12 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Thésée
Get new PFAS results for Thésée, with a short explanation. At most one update a week, only when there's something new.
- EU legal limit
- none detected sum of 20 PFAS below the detection limit, limit 100 ng/L
- Last PFAS test
- 19 March 2025
- Water supplier
- SIAEP DE LA VIGNE AUX CHAMPS
In Thésée, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 19 March 2025. The total is below 12 ng/L, the sum of the detection limits and 24 times our 0.5 ng/L benchmark. Sum of 20 PFAS: <SEUIL µg/L, below the EU legal limit (100 ng/L). Sampled in Monthou-sur-Cher, 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 Thésée
A single PFAS check has been published for Thésée so far (19 March 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 |
|---|---|---|---|
| Lead | 5 µg/L | ≤ 10 µg/L | within the limit |
See all 17 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 0.62 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 5 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.065 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <5 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | <0,010 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | 0.3 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 | 8.2 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 6.28 °f | no limit | for reference |
| Electrical conductivity | 636 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 38.5 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 21.5 mg/L | ≤ 250 mg/L | within the limit |
| Iron | 30 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Thésée safe to drink?
Yes. At the check on 18 February 2026, the tap water in Thésée 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 Thésée's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at –. The EU limit is 100 ng/L, so this water is at – of the limit. (below the EU limit)
Does the water in Thésée also meet the strictest limits in Europe?
The check cannot say. None of the four compounds was quantified, but the laboratory's detection limits add up to 12 ng/L, above Sweden's legal limit of 4 ng/L in force since 2026, so a value between the two would go unnoticed.
How hard is the water in Thésée?
The water hardness in Thésée is 6.3 °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 Thésée, so in principle the same water.
Nearby communes
The closest to Thésée 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=41258
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- MONTHOU SUR CHER
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.