PFAS in La Cresse's tap water: under 6 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 6 ng/L, 12 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 Saint-André-de-Vézines, on the same distribution network as La Cresse (CAUSSE NOIR). 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 1.5 ng/L upward. None reached that limit, so their total is below 6 ng/L rather than zero.
checked on 24 June 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoro tridecanoique (PFTrDA) | <0,005 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,0015 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0015 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0015 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,005 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0015 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,0015 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,0015 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,005 µg/L |
| Acide perfluoropentanoïque (PFPEA) | <0,0015 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,0015 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,0015 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,0015 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,0015 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0015 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,0015 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,005 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0015 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,0015 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0015 µg/L |
None found. The lab sees nothing below 6 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for La Cresse
Get new PFAS results for La Cresse, 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
- 24 June 2026
- Water supplier
- SIAEP CAUSSE NOIR
In La Cresse, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 24 June 2026. The total is below 6 ng/L, the sum of the detection limits and 12 times our 0.5 ng/L benchmark. Sum of 20 PFAS: <SEUIL µg/L, below the EU legal limit (100 ng/L). Sampled in Saint-André-de-Vézines, on the same network. 2 checks since 18 May 2026, PFAS-4 always 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 La Cresse
4 PFAS checks since 19 August 2025, from the published measurements. Samples from 3 communes on the same network: it's the same water, so each one applies to La Cresse. Samples come from 2 distribution networks. The trend refers to the network “CAUSSE NOIR”.
“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 |
|---|---|---|---|---|
| < detection limit | < detection limit | Saint-André-de-Vézines | CAUSSE NOIR | |
| < detection limit | < detection limit | La Cresse | GORGES DU TARN | |
| < 4 ng/L · calculated | < 29 ng/L | Peyreleau | CAUSSE NOIR | |
| < 4 ng/L · calculated | < 29 ng/L | Peyreleau | CAUSSE NOIR |
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: pH 9.5 unité pH on 9 July 2026 (reference 6.5–9 unité pH), Electrical conductivity 72 µS/cm on 9 July 2026 (reference 200–1,100 µS/cm). These are indicator parameters with reference values, not legal limits.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| pH | 9.5 unité pH | 6.5–9 unité pH | above the reference value |
| Electrical conductivity | 72 µS/cm | 200–1,100 µS/cm | below the reference value |
See all 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 1.3 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 0.21 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0009 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 0.36 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | 0.069 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,02 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <0,2 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | 0.47 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | <0,1 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 | 9.5 unité pH | 6.5–9 unité pH | above the reference value |
| Water hardness | 25.5 °f | no limit | for reference |
| Electrical conductivity | 72 µS/cm | 200–1,100 µS/cm | below the reference value |
| Chloride | 4.5 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 3.6 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 4.68 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 1.4 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.19 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in La Cresse safe to drink?
Yes. At the check on 9 July 2026, the tap water in La Cresse was within every limit tested. Outside a reference value: pH 9.5 unité pH on 9 July 2026 (reference 6.5–9 unité pH), Electrical conductivity 72 µS/cm on 9 July 2026 (reference 200–1,100 µS/cm). 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 en raison de son caractère agressif, susceptible de favoriser la dissolution des métaux, notamment le plomb s'il est constitutif des branchements publics ou des réseaux privés. Dans ce cas, il est recommandé de laisser couler l'eau avant de l'utiliser à des fins alimentaires. A noter de pus le pH élevé au moment du prélèvement.”
How high are PFAS levels in La Cresse's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at –. The EU limit is 100 ng/L, so this water is at – of the limit. (below the EU limit)
Does the water in La Cresse also meet the strictest limits in Europe?
The check cannot say. None of the four compounds was quantified, but the laboratory's detection limits add up to 6 ng/L, above Sweden's legal limit of 4 ng/L in force since 2026, so a value between the two would go unnoticed.
Are PFAS levels rising in La Cresse's tap water?
Too few quantified checks to say (0 since 19 August 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 La Cresse?
The water hardness in La Cresse is 25.5 °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 28 September 2026.
Same water network
Same distribution network as La Cresse, so in principle the same water.
Nearby communes
The closest to La Cresse 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=12086
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 September 2026
- Supply networks
- CAUSSE NOIR, GORGES DU TARN
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.