PFAS in the tap water of Saint-Julien (Côtes-d'Armor): under 6 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 6 ng/L, 12 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 Plaintel, on the same distribution network as Saint-Julien (SAINT JULIEN). 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 1 to 2 ng/L upward. None reached that limit, so their total is below 6 ng/L rather than zero.
checked on 27 February 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Perfluorohexane sulfonate (PFHXS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,002 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,005 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,005 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,005 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
None found. The lab sees nothing below 6 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Saint-Julien
Get new PFAS results for Saint-Julien, 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
- 27 February 2026
- Water supplier
- CA SAINT-BRIEUC ARMOR AGGLOMÉRATION
In Saint-Julien, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 27 February 2026. The total is below 6 ng/L, the sum of the detection limits and 12 times our 0.5 ng/L benchmark. Sum of 20 PFAS: <SEUIL µg/L, below the EU legal limit (100 ng/L). Sampled in Plaintel, on the same network. 4 checks since 2 April 2025: PFAS-4 up to 1.8 ng/L, sometimes below the detection limit, averaging at least 0.45 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-Julien
4 PFAS checks since 2 April 2025, values as published. Samples from 2 communes on the same network: it's the same water, so each one applies to Saint-Julien.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at |
|---|---|---|---|
| < detection limit | < detection limit | Plaintel | |
| < detection limit | < detection limit | Plaintel | |
| 1.8 ng/L | 1.8 ng/L | Saint-Brandan | |
| < detection limit | < detection limit | Saint-Brandan |
“<” 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
The authorities have not published an overall verdict for this water.
See all 14 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 22 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Cadmium | <0,025 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 | 8.3 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 15 °f | no limit | for reference |
| Electrical conductivity | 410 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 57 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 15 mg/L | ≤ 250 mg/L | within the limit |
| Iron | 4 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Saint-Julien safe to drink?
All the values shown here (24 July 2026) are within the legal limits, but the authorities have not published an overall verdict for this water. “Les analyses réalisées ont mis en évidence la présence notable de chlorates. La valeur la plus faible possible de ce paramètre doit être visée sans pour autant compromettre la désinfection. La réglementation fixe une limite de qualité à 700 µg/l lorsqu'une méthode de désinfection des eaux destinées à la consommation humaine qui génère des chlorates est utilisée. La présence de chlorates peut avoir pour origine la présence d'impuretés dans le désinfectant employé (javel, hypochlorite de calcium ...), dans ce cas la limite de qualité est fixée à 250 µg/l. Il convient, pour respecter cette exigence, de veiller à la pureté des réactifs employés ainsi qu'à leur condition de stockage et d'emploi (dosage, utilisation sous 3 mois après la livraison). Compte tenu de la teneur mesurée en chlorates sur ce prélèvement, un suivi renforcé est mis en place sur ce paramètre.”
How high are PFAS levels in Saint-Julien'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-Julien 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 6 ng/L, above Sweden's legal limit of 4 ng/L in force since 2026, so a value between the two would go unnoticed.
Are PFAS levels rising in Saint-Julien's tap water?
Too few quantified checks to say (1 since 2 April 2025). pfasnearme adds each new publication weekly; a trend needs at least three quantified values.
How hard is the water in Saint-Julien?
The water hardness in Saint-Julien is 15 °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.
Nearby communes
The closest to Saint-Julien 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=22307
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- SAINT JULIEN
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.