PFAS in Bannalec's tap water: under 6 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 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.
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 25 June 2025
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorobutanoïque (PFBA) | 0.0051 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,002 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,002 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,005 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,005 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,002 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 Bannalec
Get new PFAS results for Bannalec, with a short explanation. At most one update a week, only when there's something new.
- EU legal limit
- 5.1 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 25 June 2025
- Water supplier
- QUIMPERLE COMMUNAUTE
In Bannalec, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 25 June 2025. 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: 5.1 ng/L (0.0051 µg/L), below the EU legal limit (100 ng/L). 2 checks since 10 March 2025: sum of 20 PFAS from 5.1 ng/L to 5.4 ng/L. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Bannalec
2 PFAS checks since 10 March 2025, from the published measurements. Samples come from 2 distribution networks. The trend refers to the network “STER-GOZ”.
“Calculated”: PFAS-4 worked out from the four substances in the same sample. The chart, averages and trends use lab-published sums only.
| Date | PFAS-4 | Sum of 20 PFAS | Network |
|---|---|---|---|
| < detection limit | 5.1 ng/L | STER-GOZ, STER-GOZ | |
| 5.4 ng/L – < 10.4 ng/L · calculated | 5.4 ng/L | BANNALEC (GUERNIC) |
Calculated values: “<” is an upper bound from published thresholds, “≥” a lower bound, “–” means no published sum or complete measurement. How to read a PFAS result
What the latest check found
At the latest check, the water was within every limit tested.
See all 19 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 |
| Lead | <0,4 µg/L | ≤ 10 µg/L | within the limit |
| Arsenic | <1 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <1 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | 0.21 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.08 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 | 7.6 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 8.7 °f | no limit | for reference |
| Electrical conductivity | 270 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 23.8 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 12 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 15.8 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 2.2 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.2 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Bannalec safe to drink?
Yes. At the check on 22 July 2026, the tap water in Bannalec 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 Bannalec's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 5.1 ng/L. The EU limit is 100 ng/L, so this water is at 5 % of the limit. (below the EU limit)
Does the water in Bannalec 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 Bannalec's tap water?
Calculated PFAS-4 values are listed in the table. The chart uses laboratory-published sum-of-20 results; there are too few laboratory-published PFAS-4 sums for the existing trend calculation.
How hard is the water in Bannalec?
The water hardness in Bannalec is 8.7 °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 Bannalec, so in principle the same water.
Nearby communes
The closest to Bannalec 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=29004
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- BANNALEC (GUERNIC), STER-GOZ
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.