PFAS in Granges-Narboz's tap water: 28 ng/L, 56x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
56× 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.
More about this result
The US also limits PFOA and PFOS to 4 ng/L each, per substance.
Substances below the detection limit count as 0, so the real total may be higher.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
More PFAS than in 99% of the cities we track
checked on 15 April 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorooctane (PFOS) | 0.019 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.009 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.006 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.006 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.004 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.003 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.003 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 50 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 15 April 2026
- Water supplier
- CC DU GRAND PONTARLIER
In Granges-Narboz, the 4 most closely watched PFAS (PFAS-4) add up to 28 ng/L (0.028 µg/L) at the latest PFAS check on 15 April 2026. That's 56 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 50 ng/L (0.05 µg/L), below the EU legal limit (100 ng/L). 3 checks since 3 December 2025: PFAS-4 up to 32 ng/L, sometimes below the detection limit, averaging at least 20 ng/L over 12 months (non-detects as 0). Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Granges-Narboz
3 PFAS checks since 3 December 2025, values as published. Samples from 2 communes on the same network: it's the same water, so each one applies to Granges-Narboz.
| Date | PFAS-4 | Sum of 20 PFAS | Sampled at |
|---|---|---|---|
| 28 ng/L | 50 ng/L | Granges-Narboz | |
| 32 ng/L | 57 ng/L | Pontarlier | |
| < 4 ng/L | < 29 ng/L | Granges-Narboz |
“<” 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 | 11 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 3.7 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0746 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <2 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | <1 µg/L | ≤ 10 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 |
| Uranium | <10 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.06 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 | 7.7 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 25.4 °f | no limit | for reference |
| Electrical conductivity | 631 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 50 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 12 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 23.9 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.28 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Granges-Narboz safe to drink?
Yes. At the check on 7 July 2026, the tap water in Granges-Narboz 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 Granges-Narboz's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 50 ng/L. The EU limit is 100 ng/L, so this water is at 50 % of the limit. (below the EU limit)
Does the water in Granges-Narboz also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 28 ng/L. That is 7 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 Granges-Narboz's tap water?
Too few quantified checks to say (2 since 3 December 2025). pfasnearme adds each new publication weekly; a trend needs at least three quantified values.
How hard is the water in Granges-Narboz?
The water hardness in Granges-Narboz is 25.4 °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.
Nearby communes
The closest to Granges-Narboz 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=25293
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- CCGP GRANGES NARBOZ
Water report for Granges-Narboz
Get new PFAS results for Granges-Narboz, 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.