PFAS in Guilers's tap water: 13.9 ng/L, 27.8x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
27.8× 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 97% of the cities we track
checked on 6 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorobutanoïque (PFBA) | 0.0862 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.0213 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.0097 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.0066 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.006 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.0035 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.0024 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | 0.0014 µg/L |
| Acide perfluoro-decanoïque (PFDA) | 0.001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | 0.001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
Fails a current legal limit. Here are some filter options.
- EU legal limit
- 139.1 ng/L sum of 20 PFAS, above the 100 ng/L limit
- Last PFAS test
- 6 July 2026
- Water supplier
- SPL EAU DU PONANT
In Guilers, the 4 most closely watched PFAS (PFAS-4) add up to 13.9 ng/L (0.0139 µg/L) at the latest PFAS check on 6 July 2026. That's 27.8 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 139.1 ng/L (0.1391 µg/L), above the EU legal limit (100 ng/L). 4 checks since 1 September 2025: PFAS-4 from 5.6 ng/L to 13.9 ng/L, averaging 9.18 ng/L over 12 months. 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 Guilers
5 PFAS checks since 3 March 2025, from the published measurements. Samples from 2 communes on the same network: it's the same water, so each one applies to Guilers.
“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 |
|---|---|---|---|
| 13.9 ng/L | 139.1 ng/L | Guilers | |
| 5.6 ng/L | 18 ng/L | Guilers | |
| 8.4 ng/L | 42.3 ng/L | Brest | |
| 8.8 ng/L | 13.6 ng/L | Brest | |
| 4.7 ng/L – < 7.7 ng/L · calculated | 31.8 ng/L | Brest |
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 18 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 19 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 0.86 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.067 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | <1 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | 1.2 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,1 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | <1 µg/L | ≤ 50 µg/L | within the limit |
| Escherichia coli | 0 n/(100mL) | ≤ 0 mL) | within the limit |
| Enterococci | 0 n/(100mL) | ≤ 0 mL) | within the limit |
| Coliform bacteria | 0 n/(100mL) | ≤ 0 mL) | within the limit |
| pH | 7.8 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 12 °f | no limit | for reference |
| Electrical conductivity | 422 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 37.1 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 25 mg/L | ≤ 250 mg/L | within the limit |
| Iron | 9.5 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | 0.19 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Guilers safe to drink?
At the latest check, the water was over at least one limit. “Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.”
How high are PFAS levels in Guilers's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 139.1 ng/L. The EU limit is 100 ng/L, so this water is at 139 % of the limit. (above the EU limit)
Does the water in Guilers also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 13.9 ng/L. That is 3.5 times Sweden's legal limit of 4 ng/L, in force since 2026. Germany will set a similar one in 2028. The sum of 20 PFAS is 139.1 ng/L, above the EU legal limit of 100 ng/L.
Are PFAS levels rising in Guilers's tap water?
Yes. On the main network, the PFAS-4 sum rose from 8.8 ng/L (1 September 2025) to 13.9 ng/L (6 July 2026) across 4 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 Guilers?
The water hardness in Guilers is 12 °f (soft). 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.
Nearby communes
The closest to Guilers 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=29069
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- GUILERS
Water report for Guilers
Get new PFAS results for Guilers, 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.