PFAS in Plérin's tap water: under 4 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 4 ng/L, 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.
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 ng/L upward. None reached that limit, so their total is below 4 ng/L rather than zero.
checked on 27 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorobutanoïque (PFBA) | 0.0022 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
None found. The lab sees nothing below 4 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Plérin
Get new PFAS results for Plérin, with a short explanation. At most one update a week, only when there's something new.
- EU legal limit
- 2.2 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 27 July 2026
- Water supplier
- CA SAINT-BRIEUC ARMOR AGGLOMÉRATION
In Plérin, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 27 July 2026. The total is below 4 ng/L, the sum of the detection limits and 8 times our 0.5 ng/L benchmark. Sum of 20 PFAS: 2.2 ng/L (0.0022 µg/L), below the EU legal limit (100 ng/L). 9 checks since 14 May 2025: PFAS-4 up to 199.5 ng/L, sometimes below the detection limit, averaging at least 34.9 ng/L over 12 months (non-detects as 0). Falling on the main network. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Plérin
9 PFAS checks since 14 May 2025, values as published. Samples from 4 communes on the same network: it's the same water, so each one applies to Plérin. Samples come from 4 distribution networks. The trend refers to the network “PLERNEUF”.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at | Network |
|---|---|---|---|---|
| < detection limit | 2.2 ng/L | Plérin | LE LEGUE | |
| 2.9 ng/L | 18 ng/L | Plérin | PAR RESERVOIR DU SEPULCRE | |
| 3.7 ng/L | 16.5 ng/L | Plérin | LE LEGUE, PLERIN CENTRE ET NORD | |
| 3.2 ng/L | 6.1 ng/L | Plerneuf | PLERNEUF | |
| 6.7 ng/L | 6.7 ng/L | Plouha | PLERNEUF, PAR RESERVOIR DU SEPULCRE +1 | |
| < detection limit | < detection limit | Plerneuf | PLERNEUF | |
| < detection limit | < detection limit | Pléguien | PLERNEUF, PAR RESERVOIR DU SEPULCRE +1 | |
| 199.5 ng/L | 260.6 ng/L | Plerneuf | PLERNEUF | |
| < detection limit | < detection limit | Plouha | PLERNEUF, PAR RESERVOIR DU SEPULCRE +1 |
“<” 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 18 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 19 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Arsenic | <0,5 µg/L | ≤ 10 µg/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 |
| Uranium | <0,5 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.066 mg/L | ≤ 1.5 mg/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 | 13 °f | no limit | for reference |
| Electrical conductivity | 374 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 51 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 16 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 23 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 4.7 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Plérin safe to drink?
Yes. At the check on 27 July 2026, the tap water in Plérin was within every limit tested. “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 humainequi génère des chlorates est utilisée. Au delà de cette valeur, il est recommandé de ne pas consommer cette eau, une restriction d'usage est nécessaire. 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 sera mis en place sur ce paramètre.”
How high are PFAS levels in Plérin's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 2.2 ng/L. The EU limit is 100 ng/L, so this water is at 2 % of the limit. (below the EU limit)
Does the water in Plérin 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 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 Plérin's tap water?
No, they are falling. On the main network, the PFAS-4 sum went from 199.5 ng/L (27 May 2025) to 3.2 ng/L (11 March 2026) across 3 quantified checks.
How hard is the water in Plérin?
The water hardness in Plérin is 13 °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 Plérin, so in principle the same water.
Nearby communes
The closest to Plérin 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=22187
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- PLERNEUF, LE LEGUE, PAR RESERVOIR DU SEPULCRE, PLERIN CENTRE ET NORD
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.