PFAS in the tap water of Chessy (Rhône): 31 ng/L, 62x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
62× 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 Létra, on the same distribution network as Chessy (CHESSY). 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 100% of the cities we track
checked on 8 June 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorooctane (PFOS) | 0.016 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.009 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.008 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.007 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.006 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.004 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.004 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | 0.003 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 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
- 57 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 8 June 2026
- Water supplier
- MAIRIE DE CHESSY
In Chessy, the 4 most closely watched PFAS (PFAS-4) add up to 31 ng/L (0.031 µg/L) at the latest PFAS check on 8 June 2026. That's 62 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 57 ng/L (0.057 µg/L), below the EU legal limit (100 ng/L). Sampled in Létra, on the same network. 5 checks since 7 January 2026: PFAS-4 from 29 ng/L to 35 ng/L, averaging 32.6 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 Chessy
5 PFAS checks since 7 January 2026, values as published. Samples from 5 communes on the same network: it's the same water, so each one applies to Chessy.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at |
|---|---|---|---|
| 31 ng/L | 57 ng/L | Létra | |
| 34 ng/L | 62 ng/L | Chessy | |
| 29 ng/L | 57 ng/L | Dommartin | |
| 34 ng/L | 65 ng/L | Fleurieux-sur-l'Arbresle | |
| 35 ng/L | 69 ng/L | Bagnols |
“<” 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.
See all 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 3.3 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 | 0.013 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <5 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | 2.4 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <5 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | <10 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.13 mg/L | ≤ 1.5 mg/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 | 7.5 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 24.15 °f | no limit | for reference |
| Electrical conductivity | 373 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 10.8 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 35.8 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 21.5 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Chessy safe to drink?
Yes. At the check on 21 July 2026, the tap water in Chessy 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 Chessy's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 57 ng/L. The EU limit is 100 ng/L, so this water is at 57 % of the limit. (below the EU limit)
Does the water in Chessy also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 31 ng/L. That is 7.8 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 Chessy's tap water?
No clear trend. Since 7 January 2026, 5 checks have been published; on the main network the PFAS-4 sum ranged between 29 ng/L and 35 ng/L (5 quantified values), at times below the detection limit. pfasnearme only reports a trend from a change of at least 25 % and 1 ng/L.
How hard is the water in Chessy?
The water hardness in Chessy is 24.2 °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 28 September 2026.
Nearby communes
The closest to Chessy 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=69056
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 September 2026
- Supply networks
- CHESSY
Water report for Chessy
Get new PFAS results for Chessy, 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.