PFAS in Saint-Christophe-de-Valains's tap water: under 3.4 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 3.4 ng/L, 6.8 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 Saint-Ouen-des-Alleux, on the same distribution network as Saint-Christophe-de-Valains (VALLEE COUESNON_HAUTE CHELLERAIS_ST OUEN DES ALLEUX). 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 0.4 to 1 ng/L upward. None reached that limit, so their total is below 3.4 ng/L rather than zero.
checked on 29 January 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorododécanoique (PFDoDA) | <0,0010 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,0010 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,00040 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,0050 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,00040 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,0010 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,00040 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0010 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0010 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,00040 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,0010 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,00040 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,0050 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,00040 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,00040 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,00040 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,0010 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0010 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,00040 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,0010 µg/L |
None found. The lab sees nothing below 3.4 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Saint-Christophe-de-Valains
Get new PFAS results for Saint-Christophe-de-Valains, 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
- 29 January 2026
- Water supplier
- STGS
In Saint-Christophe-de-Valains, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 29 January 2026. The total is below 3.4 ng/L, the sum of the detection limits and 6.8 times our 0.5 ng/L benchmark. Sum of 20 PFAS: <SEUIL µg/L, below the EU legal limit (100 ng/L). Sampled in Saint-Ouen-des-Alleux, on the same network. 3 checks since 15 May 2025: PFAS-4 up to 1.1 ng/L, sometimes below the detection limit, averaging at least 0.37 ng/L over 12 months (non-detects as 0). Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Saint-Christophe-de-Valains
3 PFAS checks since 15 May 2025, values as published. Samples from 2 communes on the same network: it's the same water, so each one applies to Saint-Christophe-de-Valains.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at |
|---|---|---|---|
| < detection limit | < detection limit | Saint-Ouen-des-Alleux | |
| 1.1 ng/L | 3.64 ng/L | Gahard | |
| < detection limit | < detection limit | Gahard |
“<” means not detected, the figure being the detection limit. “–” means not published. Labs have only reported the PFAS-4 sum (SANDRE code 9268) since autumn 2025. How to read a PFAS result
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 | 21.6 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,02 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <1,0 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0027 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 3.2 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | <0,025 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <1,0 µg/L | ≤ 50 µg/L | within the limit |
| Escherichia coli | 0 n/(100mL) | ≤ 0 mL) | within the limit |
| Enterococci | 0 n/(100mL) | ≤ 0 mL) | within the limit |
| Coliform bacteria | 0 n/(100mL) | ≤ 0 mL) | within the limit |
| pH | 8.2 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 16.6 °f | no limit | for reference |
| Electrical conductivity | 465 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 47.6 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 29.4 mg/L | ≤ 250 mg/L | within the limit |
| Iron | <20 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,20 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Saint-Christophe-de-Valains safe to drink?
Yes. At the check on 20 July 2026, the tap water in Saint-Christophe-de-Valains was within every limit tested. “Eau d'alimentation conforme aux limites réglementaires en vigueur, mais ne respectant pas la référence de qualité fixée pour le paramètre température en ce point d'échantillonage.”
How high are PFAS levels in Saint-Christophe-de-Valains'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 Saint-Christophe-de-Valains also meet the strictest limits in Europe?
As far as this check can tell, yes. None of the four compounds was quantified, so their total is below 3.4 ng/L, the sum of the laboratory's detection limits, and under Sweden's legal limit of 4 ng/L in force since 2026.
Are PFAS levels rising in Saint-Christophe-de-Valains's tap water?
Too few quantified checks to say (1 since 15 May 2025). pfasnearme adds each new publication weekly; a trend needs at least three quantified values.
How hard is the water in Saint-Christophe-de-Valains?
The water hardness in Saint-Christophe-de-Valains is 16.6 °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 21 September 2026.
Same water network
Same distribution network as Saint-Christophe-de-Valains, so in principle the same water.
Nearby communes
The closest to Saint-Christophe-de-Valains 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=35261
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- VALLEE COUESNON_HAUTE CHELLERAIS_ST OUEN DES ALLEUX
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.