PFAS in Uncey-le-Franc's tap water: under 2.5 ng/L, none of the four main PFAS detected
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
None of the 4 most harmful PFAS detected
The lab sees nothing below 2.5 ng/L, 5 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 Avosnes, on the same distribution network as Uncey-le-Franc (SESAM, R. AVOSNES MARCELLOIS). 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 0.5 to 1 ng/L upward. None reached that limit, so their total is below 2.5 ng/L rather than zero.
checked on 1 December 2025
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorobutanoïque (PFBA) | 0.0021 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,002 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,002 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,0005 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0005 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,0005 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,0005 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,0005 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,0005 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
None found. The lab sees nothing below 2.5 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Uncey-le-Franc
Get new PFAS results for Uncey-le-Franc, with a short explanation. At most one update a week, only when there's something new.
- EU legal limit
- 2.1 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 1 December 2025
- Water supplier
- SUEZ EAU FRANCE SAS - COTE D'OR
In Uncey-le-Franc, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 1 December 2025. The total is below 2.5 ng/L, the sum of the detection limits and 5 times our 0.5 ng/L benchmark. Sum of 20 PFAS: 2.1 ng/L (0.0021 µg/L), below the EU legal limit (100 ng/L). Sampled in Avosnes, on the same network. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Uncey-le-Franc
A single PFAS check has been published for Uncey-le-Franc so far (1 December 2025). A history will build up with the next checks; this page is refreshed weekly.
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.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 29.4 mg/L | ≤ 50 mg/L | within the limit |
| Lead | 6 µg/L | ≤ 10 µg/L | within the limit |
See all 18 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 29.4 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 6 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.044 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <2 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <2 µg/L | ≤ 50 µg/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 | 7.7 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 33.9 °f | no limit | for reference |
| Electrical conductivity | 619 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 7.6 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 12.4 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 3 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,50 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Uncey-le-Franc safe to drink?
Yes. At the check on 8 June 2026, the tap water in Uncey-le-Franc 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 Uncey-le-Franc's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 2.1 ng/L. The EU limit is 100 ng/L, so this water is at 2 % of the limit. (below the EU limit)
Does the water in Uncey-le-Franc 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 2.5 ng/L, the sum of the laboratory's detection limits, and under Sweden's legal limit of 4 ng/L in force since 2026.
How hard is the water in Uncey-le-Franc?
The water hardness in Uncey-le-Franc is 33.9 °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 Uncey-le-Franc, so in principle the same water.
Nearby communes
The closest to Uncey-le-Franc 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=21649
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 12 September 2026
- Supply networks
- SESAM, R. AVOSNES MARCELLOIS
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.