PFAS in Château-Gontier-sur-Mayenne's tap water: 2.8 ng/L, 5.6x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
5.6× 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.
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 88% of the cities we track
checked on 22 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluorohexanoïque (PFHXA) | 0.0038 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.0036 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.0029 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.0021 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.0015 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | 0.0015 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.0007 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0015 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <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 perfluoro tridecane sulfonique (PFTrDS) | <0,0015 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0015 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0015 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0015 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0015 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,0005 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0015 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 16 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 22 July 2026
- Water supplier
- VEOLIA EAU-COMPAGNIE GENERALE DES EAUX
In Château-Gontier-sur-Mayenne, the 4 most closely watched PFAS (PFAS-4) add up to 2.8 ng/L (0.0028 µg/L) at the latest PFAS check on 22 July 2026. That's 5.6 times our 0.5 ng/L health benchmark, but below Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 16 ng/L (0.016 µg/L), below the EU legal limit (100 ng/L). 14 checks since 28 January 2025: sum of 20 PFAS up to 16 ng/L, sometimes 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 Château-Gontier-sur-Mayenne
14 PFAS checks since 28 January 2025, from the published measurements. Samples from 2 communes on the same network: it's the same water, so each one applies to Château-Gontier-sur-Mayenne. Samples come from 7 distribution networks. The trend refers to the network “CHATEAU-GONTIER”.
“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 |
|---|---|---|---|---|
| 2.8 ng/L – < 4.8 ng/L · calculated | 16 ng/L | Château-Gontier-sur-Mayenne | CHATEAU-GONTIER | |
| 0.9 ng/L – < 3.4 ng/L · calculated | 12 ng/L | Château-Gontier-sur-Mayenne | CHATEAU-GONTIER OUEST SUD ET ST FORT | |
| 0.8 ng/L – < 3.3 ng/L · calculated | 4.3 ng/L | Château-Gontier-sur-Mayenne | 053000240, 053003552 +2 | |
| 0.8 ng/L – < 3.3 ng/L · calculated | 4.5 ng/L | Château-Gontier-sur-Mayenne | CHATEAU-GONTIER | |
| 0.7 ng/L – < 3.2 ng/L · calculated | 6 ng/L | Château-Gontier-sur-Mayenne | CHATEAU-GONTIER OUEST SUD ET ST FORT | |
| 2 ng/L – < 4 ng/L · calculated | 4.9 ng/L | Daon | BIERNE | |
| 0.6 ng/L – < 3.1 ng/L · calculated | 6.5 ng/L | Château-Gontier-sur-Mayenne | 053000240, 053003552 +2 | |
| 6.1 ng/L – < 6.6 ng/L · calculated | 16 ng/L | Daon | BIERNE | |
| 1.2 ng/L – < 3.2 ng/L · calculated | 8.9 ng/L | Château-Gontier-sur-Mayenne | CHATEAU-GONTIER OUEST SUD ET ST FORT | |
| < 10 ng/L · calculated | < detection limit | Château-Gontier-sur-Mayenne | CHATEAU-GONTIER | |
| < 10 ng/L · calculated | < detection limit | Château-Gontier-sur-Mayenne | CHATEAU-GONTIER | |
| < 10 ng/L · calculated | < detection limit | Château-Gontier-sur-Mayenne | CHATEAU-GONTIER OUEST SUD ET ST FORT |
Show the 2 earlier checks (back to 28 January 2025)
| < 10 ng/L · calculated | < detection limit | Daon | BIERNE | |
| < 10 ng/L · calculated | < detection limit | Château-Gontier-sur-Mayenne | 053000240, 053003552 +2 |
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 21 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 5.6 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <0,1 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0238 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 1.8 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | <0,2 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,02 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | 0.5 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | <0,02 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.107 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 | 7.9 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 14.2 °f | no limit | for reference |
| Electrical conductivity | 500 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 75.4 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 20.8 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 31.4 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 6 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Château-Gontier-sur-Mayenne safe to drink?
Yes. At the check on 29 July 2026, the tap water in Château-Gontier-sur-Mayenne 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 Château-Gontier-sur-Mayenne's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 16 ng/L. The EU limit is 100 ng/L, so this water is at 16 % of the limit. (below the EU limit)
Does the water in Château-Gontier-sur-Mayenne 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 2.8 ng/L stays below.
Are PFAS levels rising in Château-Gontier-sur-Mayenne'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 Château-Gontier-sur-Mayenne?
The water hardness in Château-Gontier-sur-Mayenne is 14.2 °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.
Same water network
Same distribution network as Château-Gontier-sur-Mayenne, so in principle the same water.
Nearby communes
The closest to Château-Gontier-sur-Mayenne 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=53062
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- BIERNE, CHATEAU-GONTIER, CHATEAU-GONTIER OUEST SUD ET ST FORT, AZÉ ZONE AGGLOMÉRÉE NORD-OUEST
Water report for Château-Gontier-sur-Mayenne
Get new PFAS results for Château-Gontier-sur-Mayenne, 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.