PFAS in Crossac's tap water: 0.8 ng/L, 1.6x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
1.6× 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 Assérac, on the same distribution network as Crossac (CROSSAC-MISSILLAC-STE REINE DE BRETAGNE). 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 82% of the cities we track
checked on 17 June 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoropentanoïque (PFPEA) | 0.0028 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.0028 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.0023 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.0014 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.0008 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,0015 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0015 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0015 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0015 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0015 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0015 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0015 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 10 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 17 June 2026
- Water supplier
- SAUR
In Crossac, the 4 most closely watched PFAS (PFAS-4) add up to 0.8 ng/L (0.0008 µg/L) at the latest PFAS check on 17 June 2026. That's 1.6 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 10 ng/L (0.01 µg/L), below the EU legal limit (100 ng/L). Sampled in Assérac, on the same network. 2 checks since 24 February 2026: sum of 20 PFAS from 6.4 ng/L to 10 ng/L. Source: Hub'eau, Qualité de l'eau potable (Ministère de la Santé / OFB / BRGM).
Details and sources
PFAS over time in Crossac
2 PFAS checks since 24 February 2026, from the published measurements.
“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 |
|---|---|---|---|
| 0.8 ng/L – < 4.3 ng/L · calculated | 10 ng/L | Assérac | |
| 0.7 ng/L – < 3.2 ng/L · calculated | 6.4 ng/L | Assérac |
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.
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 25 mg/L | ≤ 50 mg/L | within the limit |
See all 17 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 25 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 | 0.0149 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 0.9 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | <0,010 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | 0.3 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 | 16.2 °f | no limit | for reference |
| Electrical conductivity | 451 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 65.5 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 19.5 mg/L | ≤ 250 mg/L | within the limit |
| Iron | 5 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Crossac safe to drink?
Yes. At the check on 17 June 2026, the tap water in Crossac 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 Crossac's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 10 ng/L. The EU limit is 100 ng/L, so this water is at 10 % of the limit. (below the EU limit)
Does the water in Crossac 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 0.8 ng/L stays below.
Are PFAS levels rising in Crossac's tap water?
Calculated PFAS-4 values are listed in the table. The chart uses laboratory-published sum-of-20 results; there are too few laboratory-published PFAS-4 sums for the existing trend calculation.
How hard is the water in Crossac?
The water hardness in Crossac is 16.2 °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 Crossac, so in principle the same water.
Nearby communes
The closest to Crossac 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=44050
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- CROSSAC-MISSILLAC-STE REINE DE BRETAGNE
Water report for Crossac
Get new PFAS results for Crossac, 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.