PFAS in Ayse'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.
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 7 April 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,002 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
None found. The lab sees nothing below 4 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Ayse
Get new PFAS results for Ayse, 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
- 7 April 2026
- Water supplier
- REGIE DES EAUX FAUCIGNY GLIERES
In Ayse, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 7 April 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). 3 checks since 13 October 2025, PFAS-4 always below the detection limit (4 ng/L). Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Ayse
4 PFAS checks since 23 April 2025, from the published measurements. Samples from 2 communes on the same network: it's the same water, so each one applies to Ayse. Samples come from 3 distribution networks. The trend refers to the network “AYZE - PRINCIPAL D'AYZE”.
“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 | Ayse | AYZE - PRINCIPAL D'AYZE | |
| < 4 ng/L | < 29 ng/L | Marignier | L'EPONNET, L'EPONNET | |
| < 4 ng/L | < 29 ng/L | Ayse | AYZE - PRINCIPAL D'AYZE, AYZE - BRIN NANT | |
| < 4 ng/L · calculated | < 100 ng/L | Ayse | AYZE - PRINCIPAL D'AYZE |
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.
Outside a reference value: Coliform bacteria 43 n/(100mL) on 7 April 2026 (reference ≤ 0 mL)). These are indicator parameters with reference values, not legal limits.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Coliform bacteria | 43 n/(100mL) | ≤ 0 mL) | above the reference value |
See all 20 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 2.1 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,03 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <0,20 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0015 mg/L | ≤ 2 mg/L | within the limit |
| Arsenic | <0,50 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 |
| Uranium | 0.95 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.09 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 | 43 n/(100mL) | ≤ 0 mL) | above the reference value |
| pH | 8 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 20.7 °f | no limit | for reference |
| Electrical conductivity | 379 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 1.15 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 27.8 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 1.39 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,20 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Ayse safe to drink?
Yes. At the check on 7 April 2026, the tap water in Ayse was within every limit tested. Outside a reference value: Coliform bacteria 43 n/(100mL) on 7 April 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 Ayse'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 Ayse 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 Ayse's tap water?
Too few quantified checks to say (0 since 23 April 2025). 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 Ayse?
The water hardness in Ayse is 20.7 °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 12 September 2026.
Same water network
Same distribution network as Ayse, so in principle the same water.
Nearby communes
The closest to Ayse 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=74024
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- L'EPONNET, AYZE - PRINCIPAL D'AYZE, AYZE - COIGNET, AYZE - CULLET, AYZE - BRIN NANT, AYZE - CHEZ JEANDET CHARDON, AYZE - CHEZ VALLET BROISIN BOZON
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.