PFAS in Le Croisic's tap water: 1.7 ng/L, 3.4x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
3.4× 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.
Sample taken in Guérande, on the same distribution network as Le Croisic (SECTEUR SUD - CAP ATLANTIQUE). 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.
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 85% of the cities we track
checked on 16 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoropentanoïque (PFPEA) | 0.0033 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.0013 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.0007 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0015 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,005 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,0005 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0015 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0015 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0015 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0015 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,005 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0015 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,0015 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 6.4 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 16 July 2026
- Water supplier
- SAUR SEPIG - SECT. CAP ATLANTIQUE
In Le Croisic, the 4 most closely watched PFAS (PFAS-4) add up to 1.7 ng/L (0.0017 µg/L) at the latest PFAS check on 16 July 2026. That's 3.4 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 6.4 ng/L (0.0064 µg/L), below the EU legal limit (100 ng/L). Sampled in Guérande, on the same network. 9 checks since 10 February 2025: PFAS-4 up to 5.1 ng/L, sometimes below the detection limit, averaging at least 1.34 ng/L over 12 months (non-detects as 0). Rising on the main network. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Le Croisic
12 PFAS checks since 10 February 2025, from the published measurements. Samples from 2 communes on the same network: it's the same water, so each one applies to Le Croisic.
“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 |
|---|---|---|---|
| 1.7 ng/L – < 3.7 ng/L · calculated | 6.4 ng/L | Guérande | |
| 1.2 ng/L – < 3.2 ng/L · calculated | 7.8 ng/L | Guérande | |
| 1.2 ng/L – < 4.2 ng/L · calculated | 6.7 ng/L | Guérande | |
| 4.5 ng/L | 24 ng/L | Férel | |
| 5.1 ng/L | 32 ng/L | Férel | |
| 2.5 ng/L | 18 ng/L | Férel | |
| < detection limit | < detection limit | Férel | |
| < detection limit | < detection limit | Férel | |
| < detection limit | < detection limit | Férel | |
| < detection limit | < detection limit | Férel | |
| < detection limit | < detection limit | Férel | |
| < detection limit | < detection limit | Férel |
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 17 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 13 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 0.4 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0543 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 2.8 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | <0,010 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | 0.5 µg/L | ≤ 50 µg/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 | 8 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 16 °f | no limit | for reference |
| Electrical conductivity | 533 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 75.6 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 38.9 mg/L | ≤ 250 mg/L | within the limit |
| Iron | 10 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.48 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Le Croisic safe to drink?
Yes. At the check on 16 July 2026, the tap water in Le Croisic 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 Le Croisic's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 6.4 ng/L. The EU limit is 100 ng/L, so this water is at 6 % of the limit. (below the EU limit)
Does the water in Le Croisic also meet the strictest limits in Europe?
Yes. Even against Europe's strictest legal limit, Sweden's 4 ng/L in force since 2026, the measured value of 1.7 ng/L stays below.
Are PFAS levels rising in Le Croisic's tap water?
Yes. On the main network, the PFAS-4 sum rose from 2.5 ng/L (28 August 2025) to 4.5 ng/L (25 November 2025) across 3 quantified checks. pfasnearme's benchmark is 0.5 ng/L as an annual mean. These history statistics use laboratory-published sums only.
How hard is the water in Le Croisic?
The water hardness in Le Croisic is 16 °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.
Same water network
Same distribution network as Le Croisic, so in principle the same water.
Nearby communes
The closest to Le Croisic 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=44049
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- SECTEUR SUD - CAP ATLANTIQUE
Water report for Le Croisic
Get new PFAS results for Le Croisic, 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.