PFAS in Hennebont's tap water: between 0.5 and 4 ng/L
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
PFAS-4 found at a low level
0.5 ng/L of PFAS-4 was found. The other substances were below the lab's detection limit, so the true total sits between 0.5 ng/L and 4 ng/L. Our benchmark of 0.5 ng/L falls inside that range, so the check cannot settle it.
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.
Substances below the detection limit count as 0, so the real total may be higher.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
checked on 30 June 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorohexanoïque (PFHXA) | 0.0024 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.0021 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.002 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.0005 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,0015 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,0015 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0015 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0015 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0015 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0015 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0015 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,0005 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0015 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
Some PFAS found. The test cannot say if the water is above or below our 0.5 ng/L benchmark.
- EU legal limit
- 7 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 30 June 2026
- Water supplier
- SAUR
In Hennebont, the 4 most closely watched PFAS (PFAS-4) add up to between 0.5 ng/L and 4 ng/L at the latest PFAS check on 30 June 2026, because some were below the detection limit. Our 0.5 ng/L benchmark falls inside that range, so there's no verdict. Sum of 20 PFAS: 7 ng/L (0.007 µg/L), below the EU legal limit (100 ng/L). 15 checks since 25 February 2025: PFAS-4 up to 11 ng/L, sometimes below the detection limit, averaging at least 0.08 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 Hennebont
15 PFAS checks since 25 February 2025, values as published. Samples from 2 communes on the same network: it's the same water, so each one applies to Hennebont. Samples come from 2 distribution networks. The trend refers to the network “CAUDAN”.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at | Network |
|---|---|---|---|---|
| 0.5 ng/L | 7 ng/L | Hennebont | CAUDAN | |
| < detection limit | 3.1 ng/L | Hennebont | 056000358 | |
| < detection limit | 1 ng/L | Hennebont | CAUDAN | |
| < detection limit | < detection limit | Hennebont | 056000358 | |
| < detection limit | 1.6 ng/L | Caudan | CAUDAN | |
| < detection limit | 2.4 ng/L | Hennebont | CAUDAN | |
| 0.6 ng/L | 5.6 ng/L | Hennebont | 056000358 | |
| < detection limit | 0.6 ng/L | Hennebont | CAUDAN | |
| 0.8 ng/L | 6.3 ng/L | Hennebont | 056000358 | |
| < detection limit | 5.6 ng/L | Hennebont | CAUDAN | |
| 0.8 ng/L | 12 ng/L | Hennebont | 056000358 | |
| < detection limit | < detection limit | Hennebont | CAUDAN |
Show the 3 earlier checks (back to 25 February 2025)
| 11 ng/L | 11 ng/L | Hennebont | 056000358 | |
| < detection limit | < detection limit | Hennebont | 056000358 | |
| < detection limit | < detection limit | Hennebont | CAUDAN |
“<” 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.
Values to watch
These results are close to their legal limit, or over it.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 26 mg/L | ≤ 50 mg/L | within the limit |
See all 18 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 26 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Arsenic | <0,5 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,05 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <5 µg/L | ≤ 6 µg/L | within the limit |
| Uranium | 0.07 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | <0,10 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 | 8.4 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 14.3 °f | no limit | for reference |
| Electrical conductivity | 374 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 56.4 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 12.2 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 20.2 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 17 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Hennebont safe to drink?
Yes. At the check on 1 July 2026, the tap water in Hennebont was within every limit tested. “Eau d’alimentation conforme aux limites de qualité et satisfaisant aux références de qualité, à l’exception d’une variation du dénombrement des germes totaux (germes aérobies revivifiables), supérieure à un fac teur de 10 par rapport à la moyenne géométrique des résultats du secte ur pertinent, et d’une température supérieure à la valeur de référence de 25 °C, en lien avec les fortes chaleurs.”
How high are PFAS levels in Hennebont's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 7 ng/L. The EU limit is 100 ng/L, so this water is at 7 % of the limit. (below the EU limit)
Does the water in Hennebont also meet the strictest limits in Europe?
Yes. Even against Europe's strictest legal limit, Sweden's 4 ng/L in force since 2026, the measured value of 0.5 ng/L stays below.
Are PFAS levels rising in Hennebont's tap water?
Too few quantified checks to say (1 since 25 February 2025). pfasnearme adds each new publication weekly; a trend needs at least three quantified values.
How hard is the water in Hennebont?
The water hardness in Hennebont is 14.3 °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 21 September 2026.
Same water network
Same distribution network as Hennebont, so in principle the same water.
Nearby communes
The closest to Hennebont 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=56083
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- CAUDAN
Water report for Hennebont
Get new PFAS results for Hennebont, with a short explanation. At most one update a week, only when there's something new.
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.