PFAS in Castelnau-le-Lez's tap water: 23 ng/L, 46x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
46× 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.
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 24 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide sulfonique de perfluorooctane (PFOS) | 0.008 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.008 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.007 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.006 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | 0.005 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.005 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.005 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.003 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | 0.001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | 0.001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,002 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,002 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,005 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,002 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 49 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 24 July 2026
- Water supplier
- S.A. RUAS MICHEL GROUPE VEOLIA
In Castelnau-le-Lez, the 4 most closely watched PFAS (PFAS-4) add up to 23 ng/L (0.023 µg/L) at the latest PFAS check on 24 July 2026. That's 46 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 49 ng/L (0.049 µg/L), below the EU legal limit (100 ng/L). 2 checks since 10 July 2026: PFAS-4 from 1 ng/L to 23 ng/L. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Castelnau-le-Lez
12 PFAS checks since 10 July 2025, from the published measurements. Samples from 6 communes on the same network: it's the same water, so each one applies to Castelnau-le-Lez. Samples come from 2 distribution networks. The trend refers to the network “SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU”.
“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 |
|---|---|---|---|---|
| 23 ng/L | 49 ng/L | Castelnau-le-Lez | SGC - CASTELNAU LE LEZ | |
| 1 ng/L | 1 ng/L | Assas | SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU, SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU | |
| 23 ng/L – < 24 ng/L · calculated | 48 ng/L | Castelnau-le-Lez | SGC - CASTELNAU LE LEZ | |
| < 4 ng/L · calculated | < 29 ng/L | Restinclières | SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU, SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU +1 | |
| 11 ng/L – < 12 ng/L · calculated | 22 ng/L | Castries | SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU, SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU +1 | |
| 2 ng/L – < 4 ng/L · calculated | 6 ng/L | Castries | SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU, SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU +1 | |
| 26 ng/L – < 27 ng/L · calculated | 71 ng/L | Castelnau-le-Lez | SGC - CASTELNAU LE LEZ | |
| < 4 ng/L · calculated | 4 ng/L | Restinclières | SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU, SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU +1 | |
| < 4 ng/L · calculated | < 29 ng/L | Galargues | SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU, SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU +1 | |
| 24 ng/L – < 25 ng/L · calculated | 46 ng/L | Castelnau-le-Lez | SGC - CASTELNAU LE LEZ | |
| 4 ng/L – < 6 ng/L · calculated | 11 ng/L | Castries | SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU, SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU +1 | |
| < 4 ng/L · calculated | 1 ng/L | Saint-Hilaire-de-Beauvoir | SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU, SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU +1 |
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.
One routine sample was outside a limit: Nickel 37 µg/L on 13 September 2023 (limit ≤ 20 µg/L). This is a single result, not an official verdict on the supply.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nickel | 37 µg/L | ≤ 20 µg/L | over the limit |
See all 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 17 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | – | ≤ 10 µg/L | no verdict |
| Copper | 0.058 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 37 µg/L | ≤ 20 µg/L | over 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 | 0.24 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 | 6.78 unité pH | 6.5–9.5 pH | within the limit |
| Water hardness | 50.17 °f | no limit | for reference |
| Electrical conductivity | 1,087 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 77 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 93 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 41.6 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Castelnau-le-Lez safe to drink?
Yes. At the check on 24 July 2026, the tap water in Castelnau-le-Lez was within every limit tested. One routine sample was outside a limit: Nickel 37 µg/L on 13 September 2023 (limit ≤ 20 µg/L). This is a single result, not an official verdict on the supply. “Eau d'alimentation conforme aux limites de qualité et non conforme aux références de qualité.”
How high are PFAS levels in Castelnau-le-Lez's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 49 ng/L. The EU limit is 100 ng/L, so this water is at 49 % of the limit. (below the EU limit)
Does the water in Castelnau-le-Lez also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 23 ng/L. That is 5.8 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 Castelnau-le-Lez's tap water?
Too few quantified checks to say (1 since 10 July 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 Castelnau-le-Lez?
The water hardness in Castelnau-le-Lez is 50.2 °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 Castelnau-le-Lez, so in principle the same water.
Nearby communes
The closest to Castelnau-le-Lez 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=34057
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- S. GC-CASTELNAU-CLAPIERS, SGC-ASSAS-ST VINCENT-TEYRAN-CASTELNAU, SGC - CASTELNAU LE LEZ
Water report for Castelnau-le-Lez
Get new PFAS results for Castelnau-le-Lez, 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.