PFAS in Lons-le-Saunier'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 16 March 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,001 µg/L |
| Acide perfluorobutanoïque (PFBA) | <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 Lons-le-Saunier
Get new PFAS results for Lons-le-Saunier, 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
- 16 March 2026
- Water supplier
- ECLA - REGIE EAU
In Lons-le-Saunier, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 16 March 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 17 September 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 Lons-le-Saunier
7 PFAS checks since 10 March 2025, from the published measurements. Samples from 2 communes on the same network: it's the same water, so each one applies to Lons-le-Saunier. Samples come from 2 distribution networks. The trend refers to the network “LONS LE SAUNIER HS VILLEVIEUX”.
“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 | Lons-le-Saunier | LONS LE SAUNIER BS REVIGNY | |
| < 4 ng/L | < 29 ng/L | Lons-le-Saunier | LONS LE SAUNIER BS REVIGNY, LONS LE SAUNIER HS VILLEVIEUX | |
| < 4 ng/L | < 29 ng/L | Villevieux | LONS LE SAUNIER HS VILLEVIEUX | |
| < 4 ng/L · calculated | < 28 ng/L | Villevieux | LONS LE SAUNIER HS VILLEVIEUX | |
| < 4 ng/L · calculated | < 28 ng/L | Villevieux | LONS LE SAUNIER HS VILLEVIEUX | |
| < 4 ng/L · calculated | 2 ng/L | Villevieux | LONS LE SAUNIER HS VILLEVIEUX | |
| < 4 ng/L · calculated | < 100 ng/L | Lons-le-Saunier | LONS LE SAUNIER BS REVIGNY |
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.
See all 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 17 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | 0 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <2 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.087 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <5 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | <2 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 | 0.09 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 | <1 n/(100mL) | ≤ 0 mL) | within the limit |
| pH | 7.2 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 31.3 °f | no limit | for reference |
| Electrical conductivity | 590 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 6.2 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 21 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 3.2 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.3 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Lons-le-Saunier safe to drink?
Yes. At the check on 27 July 2026, the tap water in Lons-le-Saunier was within every limit tested. “Eau d'alimentation conforme aux limites de qualité. Référence de quali té non satisfaisante pour le paramètre suivant : Température.”
How high are PFAS levels in Lons-le-Saunier'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 Lons-le-Saunier 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 Lons-le-Saunier's tap water?
Too few quantified checks to say (0 since 10 March 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 Lons-le-Saunier?
The water hardness in Lons-le-Saunier is 31.3 °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 21 September 2026.
Same water network
Same distribution network as Lons-le-Saunier, so in principle the same water.
Nearby communes
The closest to Lons-le-Saunier 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=39300
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- LONS LE SAUNIER BS REVIGNY, LONS LE SAUNIER HS VILLEVIEUX
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.