PFAS in La Chapelle-de-la-Tour's tap water: 20 ng/L, 40x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
40× 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 La Tour-du-Pin, on the same distribution network as La Chapelle-de-la-Tour (VALLONS TOUR PRINCIPAL). 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.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
More PFAS than in 98% of the cities we track
checked on 9 April 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorooctane (PFOS) | 0.012 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.004 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.004 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.004 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.004 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.003 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | 0.001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | 0.001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 35 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 9 April 2026
- Water supplier
- CC LES VALS DU DAUPHINÉ
In La Chapelle-de-la-Tour, the 4 most closely watched PFAS (PFAS-4) add up to 20 ng/L (0.02 µg/L) at the latest PFAS check on 9 April 2026. That's 40 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 35 ng/L (0.035 µg/L), below the EU legal limit (100 ng/L). Sampled in La Tour-du-Pin, on the same network. 4 checks since 26 September 2025: PFAS-4 up to 21 ng/L, sometimes below the detection limit, averaging 19.67 ng/L over 12 months. No clear trend. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in La Chapelle-de-la-Tour
19 PFAS checks since 16 March 2023, from the published measurements. Samples from 4 communes on the same network: it's the same water, so each one applies to La Chapelle-de-la-Tour. Samples come from 2 distribution networks. The trend refers to the network “VALLONS TOUR PRINCIPAL”.
“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 | Network |
|---|---|---|---|---|
| 20 ng/L | 35 ng/L | La Tour-du-Pin | VALLONS TOUR PRINCIPAL | |
| 18 ng/L | 34 ng/L | Saint-Clair-de-la-Tour | VALLONS TOUR PRINCIPAL | |
| 21 ng/L | 54 ng/L | Cessieu | VALLONS TOUR PRINCIPAL | |
| < 4 ng/L | < 29 ng/L | Dolomieu | MOYEN SERVICE EST ET HAUT SERVICE | |
| < 4 ng/L · calculated | < 28 ng/L | Dolomieu | MOYEN SERVICE EST ET HAUT SERVICE | |
| 21 ng/L – < 22 ng/L · calculated | 36 ng/L | Saint-Clair-de-la-Tour | VALLONS TOUR PRINCIPAL | |
| 25 ng/L · calculated | 40 ng/L | Cessieu | VALLONS TOUR PRINCIPAL | |
| 26 ng/L · calculated | 42 ng/L | Cessieu | VALLONS TOUR PRINCIPAL | |
| < 4 ng/L · calculated | 1 ng/L | Dolomieu | MOYEN SERVICE EST ET HAUT SERVICE | |
| 32 ng/L · calculated | 47 ng/L | Cessieu | VALLONS TOUR PRINCIPAL | |
| 34 ng/L · calculated | 49 ng/L | Cessieu | VALLONS TOUR PRINCIPAL | |
| 32 ng/L · calculated | 49 ng/L | Cessieu | VALLONS TOUR PRINCIPAL |
Show the 7 earlier checks (back to 16 March 2023)
| 32 ng/L · calculated | 56 ng/L | Cessieu | VALLONS TOUR PRINCIPAL | |
| 2.8 ng/L – < 5.8 ng/L · calculated | 10.7 ng/L | Cessieu | VALLONS TOUR PRINCIPAL | |
| 36.5 ng/L · calculated | 56.5 ng/L | Cessieu | VALLONS TOUR PRINCIPAL | |
| 14 ng/L – < 15 ng/L · calculated | 30.7 ng/L | Cessieu | VALLONS TOUR PRINCIPAL | |
| 7.1 ng/L – < 10.1 ng/L · calculated | 32.3 ng/L | Cessieu | VALLONS TOUR PRINCIPAL | |
| 12.8 ng/L – < 13.8 ng/L · calculated | 32 ng/L | Cessieu | VALLONS TOUR PRINCIPAL | |
| 25.4 ng/L – < 30.4 ng/L · calculated | 44.8 ng/L | Cessieu | VALLONS TOUR PRINCIPAL |
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
The authorities have not published an overall verdict for this water.
Values to watch
These results are close to their legal limit, or over it.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 38.7 mg/L | ≤ 50 mg/L | within the limit |
See all 16 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 38.7 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 | 0.024 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <5 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | N.M. µg/L | ≤ 6 µg/L | no verdict |
| 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 | 7.61 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 30.75 °f | no limit | for reference |
| Electrical conductivity | 586 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 7.9 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 9.7 mg/L | ≤ 250 mg/L | within the limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in La Chapelle-de-la-Tour safe to drink?
All the values shown here (11 June 2026) are within the legal limits, but the authorities have not published an overall verdict for this water. “Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.”
How high are PFAS levels in La Chapelle-de-la-Tour's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 35 ng/L. The EU limit is 100 ng/L, so this water is at 35 % of the limit. (below the EU limit)
Does the water in La Chapelle-de-la-Tour also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 20 ng/L. That is 5 times Sweden's legal limit of 4 ng/L, in force since 2026. Germany will set a similar one in 2028. The water still passes the current EU legal limit (100 ng/L for the total of 20 PFAS).
Are PFAS levels rising in La Chapelle-de-la-Tour's tap water?
No clear trend. Since 16 March 2023, 4 checks have been published; on the main network the PFAS-4 sum ranged between 18 ng/L and 21 ng/L (3 quantified values), at times below the detection limit. pfasnearme only reports a trend from a change of at least 25 % and 1 ng/L. These history statistics use laboratory-published sums only.
How hard is the water in La Chapelle-de-la-Tour?
The water hardness in La Chapelle-de-la-Tour is 30.8 °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 Chapelle-de-la-Tour, so in principle the same water.
Nearby communes
The closest to La Chapelle-de-la-Tour 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=38076
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- VALLONS TOUR PRINCIPAL, MOYEN SERVICE EST ET HAUT SERVICE
Water report for La Chapelle-de-la-Tour
Get new PFAS results for La Chapelle-de-la-Tour, 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.