PFAS in the tap water of La Bretenière (Doubs): 3 ng/L, 6x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
6× above our health benchmark
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 Avilley, on the same distribution network as La Bretenière (RESEAU PUITS FOURBANNE). 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.
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).
More PFAS than in 88% of the cities we track
checked on 25 February 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoro-octanoïque (PFOA) | 0.002 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 3 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 25 February 2026
- Water supplier
- SAUR BOURGOGNE FRANCHE-COMTE
In La Bretenière, the 4 most closely watched PFAS (PFAS-4) add up to 3 ng/L (0.003 µg/L) at the latest PFAS check on 25 February 2026. That's 6 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 3 ng/L (0.003 µg/L), below the EU legal limit (100 ng/L). Sampled in Avilley, on the same network. 2 checks since 29 September 2025: PFAS-4 from 3 ng/L to 4 ng/L. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in La Bretenière
4 PFAS checks since 9 December 2024, from the published measurements. Samples from 2 communes on the same network: it's the same water, so each one applies to La Bretenière.
“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 | Sampled at |
|---|---|---|---|
| 3 ng/L | 3 ng/L | Avilley | |
| 4 ng/L | 4 ng/L | Fourbanne | |
| < 4 ng/L · calculated | < 100 ng/L | Fourbanne | |
| 2 ng/L – < 4 ng/L · calculated | 2 ng/L | Fourbanne |
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.
Values to watch
These results are close to their legal limit, or over it.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 27 mg/L | ≤ 50 mg/L | within the limit |
See all 16 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 27 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <2 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.175 mg/L | ≤ 2 mg/L | within the limit |
| Nickel | <2 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <2 µg/L | ≤ 50 µg/L | within the limit |
| Escherichia coli | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| Enterococci | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| Coliform bacteria | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| pH | 7.2 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 31.5 °f | no limit | for reference |
| Electrical conductivity | 616 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 13 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 11 mg/L | ≤ 250 mg/L | within the limit |
| Turbidity | 0.24 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in La Bretenière safe to drink?
Yes. At the check on 27 May 2026, the tap water in La Bretenière was within every limit tested. “EAU CONFORME (code de la santé publique). L'eau prélevée respecte les exigences de qualité réglementaire des eaux destinées à l'alimentation humaine pour les paramètres analysés. Cependant, les concentrations en chlore sont élevées, entraînent des désagréments pour les usagers et peuvent conduire à la production de substances organochlorées. Il convient de maintenir un résiduel en chlore libre de 0,1 mg/l en distribution.”
How high are PFAS levels in La Bretenière's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 3 ng/L. The EU limit is 100 ng/L, so this water is at 3 % of the limit. (below the EU limit)
Does the water in La Bretenière 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 3 ng/L stays below.
Are PFAS levels rising in La Bretenière's tap water?
Too few quantified checks to say (2 since 9 December 2024). pfasnearme adds each new publication weekly; a trend needs at least three quantified values. These history statistics use laboratory-published sums only.
How hard is the water in La Bretenière?
The water hardness in La Bretenière is 31.5 °f (hard). 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 12 September 2026.
Same water network
Same distribution network as La Bretenière, so in principle the same water.
Nearby communes
The closest to La Bretenière 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=25092
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- RESEAU PUITS FOURBANNE
Water report for La Bretenière
Get new PFAS results for La Bretenière, 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.