PFAS in Saint-Malo-des-Trois-Fontaines's tap water: under 3 ng/L, none of the four main PFAS detected
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
None of the 4 most harmful PFAS detected
The lab sees nothing below 3 ng/L, 6 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 Ploërmel, on the same distribution network as Saint-Malo-des-Trois-Fontaines (PLOERMEL). 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 0.5 to 1.5 ng/L upward. None reached that limit, so their total is below 3 ng/L rather than zero.
checked on 26 May 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorobutanoïque (PFBA) | 0.0044 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.0014 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0015 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,0015 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0015 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,0005 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0015 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,0005 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0015 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0015 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0015 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,0005 µg/L |
None found. The lab sees nothing below 3 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Saint-Malo-des-Trois-Fontaines
Get new PFAS results for Saint-Malo-des-Trois-Fontaines, with a short explanation. At most one update a week, only when there's something new.
- EU legal limit
- 5.8 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 26 May 2026
- Water supplier
- SAUR
In Saint-Malo-des-Trois-Fontaines, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 26 May 2026. The total is below 3 ng/L, the sum of the detection limits and 6 times our 0.5 ng/L benchmark. Sum of 20 PFAS: 5.8 ng/L (0.0058 µg/L), below the EU legal limit (100 ng/L). Sampled in Ploërmel, on the same network. 8 checks since 24 February 2025: PFAS-4 up to 1.3 ng/L, sometimes below the detection limit, averaging at least 0.26 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-Malo-des-Trois-Fontaines
8 PFAS checks since 24 February 2025, values as published.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at |
|---|---|---|---|
| < detection limit | 5.8 ng/L | Ploërmel | |
| < detection limit | 2 ng/L | Ploërmel | |
| < detection limit | 3.2 ng/L | Ploërmel | |
| < detection limit | 1.5 ng/L | Ploërmel | |
| 1.3 ng/L | 7.4 ng/L | Ploërmel | |
| 0.5 ng/L | 7.7 ng/L | Ploërmel | |
| < detection limit | < detection limit | Ploërmel | |
| < detection limit | < detection limit | Ploërmel |
“<” 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 12 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 0.63 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Cadmium | <0,05 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <0,5 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 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 13.6 °f | no limit | for reference |
| Electrical conductivity | 438 µS/cm | 200–1,100 µS/cm | within the limit |
| Iron | 97 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.41 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Saint-Malo-des-Trois-Fontaines safe to drink?
Yes. At the check on 26 May 2026, the tap water in Saint-Malo-des-Trois-Fontaines 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-Malo-des-Trois-Fontaines's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 5.8 ng/L. The EU limit is 100 ng/L, so this water is at 6 % of the limit. (below the EU limit)
Does the water in Saint-Malo-des-Trois-Fontaines 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 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-Malo-des-Trois-Fontaines's tap water?
Too few quantified checks to say (2 since 24 February 2025). pfasnearme adds each new publication weekly; a trend needs at least three quantified values.
How hard is the water in Saint-Malo-des-Trois-Fontaines?
The water hardness in Saint-Malo-des-Trois-Fontaines is 13.6 °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 21 September 2026.
Same water network
Same distribution network as Saint-Malo-des-Trois-Fontaines, so in principle the same water.
Nearby communes
The closest to Saint-Malo-des-Trois-Fontaines 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=56227
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- PLOERMEL
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.