PFAS in La Chavanne's tap water: 4 ng/L, 8x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
8× 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 Planaise, on the same distribution network as La Chavanne (SIAE CHAMOUX ZONE SUD). 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 90% of the cities we track
checked on 20 April 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Perfluorohexane sulfonate (PFHXS) | 0.002 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 4 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 20 April 2026
- Water supplier
- SYNDICAT DE CHAMOUX
In La Chavanne, the 4 most closely watched PFAS (PFAS-4) add up to 4 ng/L (0.004 µg/L) at the latest PFAS check on 20 April 2026. That's 8 times our 0.5 ng/L health benchmark, exactly at Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 4 ng/L (0.004 µg/L), below the EU legal limit (100 ng/L). Sampled in Planaise, on the same network. 3 checks since 30 July 2025: PFAS-4 up to 4 ng/L, sometimes below the detection limit, averaging at least 1.33 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 La Chavanne
3 PFAS checks since 30 July 2025, values as published. Samples from 2 communes on the same network: it's the same water, so each one applies to La Chavanne.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at |
|---|---|---|---|
| 4 ng/L | 4 ng/L | Planaise | |
| < 4 ng/L | < 29 ng/L | Hauteville | |
| < 20 ng/L | < 29 ng/L | Hauteville |
“<” 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.
Outside a reference value: Coliform bacteria 17 n/(100mL) on 1 July 2026 (reference ≤ 0 mL)). These are indicator parameters with reference values, not legal limits.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Coliform bacteria | 17 n/(100mL) | ≤ 0 mL) | above the reference value |
See all 16 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 0.8 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,03 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 0.49 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,10 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <0,50 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 | 17 n/(100mL) | ≤ 0 mL) | above the reference value |
| pH | 8.1 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 18.5 °f | no limit | for reference |
| Electrical conductivity | 348 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | <0,50 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 22.4 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 1.85 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.28 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in La Chavanne safe to drink?
Yes. At the check on 1 July 2026, the tap water in La Chavanne was within every limit tested. Outside a reference value: Coliform bacteria 17 n/(100mL) on 1 July 2026 (reference ≤ 0 mL)). These are indicator parameters with reference values, not legal limits. “Eau d'alimentation conforme aux limites de qualité et non conforme aux références de qualité.”
How high are PFAS levels in La Chavanne's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 4 ng/L. The EU limit is 100 ng/L, so this water is at 4 % of the limit. (below the EU limit)
Does the water in La Chavanne 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 4 ng/L stays below.
Are PFAS levels rising in La Chavanne's tap water?
Too few quantified checks to say (1 since 30 July 2025). pfasnearme adds each new publication weekly; a trend needs at least three quantified values.
How hard is the water in La Chavanne?
The water hardness in La Chavanne is 18.5 °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.
Same water network
Same distribution network as La Chavanne, so in principle the same water.
Nearby communes
The closest to La Chavanne 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=73082
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- SIAE CHAMOUX ZONE SUD
Water report for La Chavanne
Get new PFAS results for La Chavanne, 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.