PFAS in Rethondes's tap water: under 4 ng/L, none of the four main PFAS detected
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
No PFAS detected
The lab sees nothing below 4 ng/L, 8 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.
Sample taken in Choisy-au-Bac, on the same distribution network as Rethondes (CHOISY AU BAC). 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.
The lab detects each of the four substances from 1 ng/L upward. None reached that limit, so their total is below 4 ng/L rather than zero.
checked on 5 May 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
Fails a current legal limit. The details are below.
Water report for Rethondes
Get new PFAS results for Rethondes, with a short explanation. At most one update a week, only when there's something new.
- EU legal limit
- none detected sum of 20 PFAS below the detection limit, limit 100 ng/L
- Last PFAS test
- 5 May 2026
- Water supplier
- SAUR FRANCE
In Rethondes, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 5 May 2026. The total is below 4 ng/L, the sum of the detection limits and 8 times our 0.5 ng/L benchmark. Sum of 20 PFAS: <0,029 µg/L, below the EU legal limit (100 ng/L). Sampled in Choisy-au-Bac, on the same network. 3 checks since 9 December 2025: PFAS-4 up to 4 ng/L, sometimes below the detection limit. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Rethondes
6 PFAS checks since 10 January 2024, from the published measurements. Samples from 2 communes on the same network: it's the same water, so each one applies to Rethondes. Samples come from 2 distribution networks. The trend refers to the network “CHOISY AU BAC”.
“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 |
|---|---|---|---|---|
| < 4 ng/L | < 29 ng/L | Choisy-au-Bac | CHOISY AU BAC, RETHONDES DISTRIBUTION | |
| < 4 ng/L | < 29 ng/L | Rethondes | RETHONDES DISTRIBUTION | |
| 4 ng/L | 7 ng/L | Choisy-au-Bac | CHOISY AU BAC, RETHONDES DISTRIBUTION | |
| 2 ng/L – < 5 ng/L · calculated | 2 ng/L | Rethondes | CHOISY AU BAC | |
| 3 ng/L – < 6 ng/L · calculated | 4 ng/L | Choisy-au-Bac | CHOISY AU BAC | |
| 5.5 ng/L – < 8.5 ng/L · calculated | 9.3 ng/L | Choisy-au-Bac | CHOISY AU BAC |
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 over at least one limit.
See all 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | <0,5 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <0,5 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.021 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <0,5 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | <0,5 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,5 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <0,5 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | <10 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.301 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 | 7.4 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 28.7 °f | no limit | for reference |
| Electrical conductivity | 580 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 16.3 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 36.7 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 6.5 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <5 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Rethondes safe to drink?
At the latest check, the water was over at least one limit. “Eau d'alimentation non-conforme aux limites de qualité en vigueur pour le paramètre dalapon et non satisfaisante à la référence de quali té pour le paramètre Carbone Organique Total. Toutefois, cette eau est propre à la consommation humaine car la concentration du pesticide concerné reste inférieure aux valeurs sanitaires. Un contrôle renforcé est mis en place.”
How high are PFAS levels in Rethondes's drinking water?
At the latest check the total of 20 PFAS ("forever chemicals") was below the laboratory's reporting limit of 29 ng/L. The EU limit is 100 ng/L, so this water is under 29 % of the limit. (below the EU limit)
Does the water in Rethondes also meet the strictest limits in Europe?
As far as this check can tell, yes. None of the four compounds was quantified, so their total is below 4 ng/L, the sum of the laboratory's detection limits, and under Sweden's legal limit of 4 ng/L in force since 2026.
Are PFAS levels rising in Rethondes's tap water?
Too few quantified checks to say (1 since 10 January 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 Rethondes?
The water hardness in Rethondes is 28.7 °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 Rethondes, so in principle the same water.
Nearby communes
The closest to Rethondes 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=60534
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- CHOISY AU BAC, RETHONDES DISTRIBUTION
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.