PFAS in the tap water of Allonnes (Sarthe): under 3 ng/L, none of the four main PFAS detected
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
None of the 4 most harmful PFAS detected
The lab sees nothing below 3 ng/L, 6 times our benchmark of 0.5 ng/L. Water above our benchmark would pass this check unnoticed.
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 Le Mans, on the same distribution network as Allonnes (LE MANS METROPOLE ESU). 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.
The lab detects each of the four substances from 0.5 to 1.5 ng/L upward. None reached that limit, so their total is below 3 ng/L rather than zero.
checked on 1 June 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoropentanoïque (PFPEA) | 0.0011 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0015 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0015 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0015 µg/L |
| Acide perfluorobutanoïque (PFBA) | <0,0015 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0015 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | <0,0005 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,0015 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0015 µg/L |
| Acide perfluorohexanoïque (PFHXA) | <0,001 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Perfluorohexane sulfonate (PFHXS) | <0,0005 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,0005 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0015 µg/L |
None found. The lab sees nothing below 3 ng/L, so our 0.5 ng/L benchmark cannot be checked.
Water report for Allonnes
Get new PFAS results for Allonnes, with a short explanation. At most one update a week, only when there's something new.
- EU legal limit
- 1.1 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 1 June 2026
- Water supplier
- LE MANS METROPOLE
In Allonnes, none of the 4 most closely watched PFAS (PFAS-4) was detected at the latest PFAS check on 1 June 2026. The total is below 3 ng/L, the sum of the detection limits and 6 times our 0.5 ng/L benchmark. Sum of 20 PFAS: 1.1 ng/L (0.0011 µg/L), below the EU legal limit (100 ng/L). Sampled in Le Mans, on the same network. 5 checks since 27 January 2025: sum of 20 PFAS up to 2.8 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 Allonnes
5 PFAS checks since 27 January 2025, 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 |
|---|---|---|---|
| < 3 ng/L · calculated | 1.1 ng/L | Le Mans | |
| < 3 ng/L · calculated | 0.7 ng/L | Le Mans | |
| < 3 ng/L · calculated | 2.8 ng/L | Le Mans | |
| < 10 ng/L · calculated | < detection limit | Le Mans | |
| < 10 ng/L · calculated | < detection limit | Le Mans |
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
The authorities have not published an overall verdict for this water.
See all 18 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 19 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | 0.6 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0223 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 2.2 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | 0.01 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | 0.4 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 | 7.6 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 29 °f | no limit | for reference |
| Electrical conductivity | 704 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 79.1 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 28.8 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 15.9 mg/L | ≤ 200 mg/L | within the limit |
| Iron | 16 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Allonnes safe to drink?
All the values shown here (17 June 2026) are within the legal limits, but the authorities have not published an overall verdict for this water. “Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.”
How high are PFAS levels in Allonnes's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 1.1 ng/L. The EU limit is 100 ng/L, so this water is at 1 % of the limit. (below the EU limit)
Does the water in Allonnes also meet the strictest limits in Europe?
As far as this check can tell, yes. None of the four compounds was quantified, so their total is below 3 ng/L, the sum of the laboratory's detection limits, and under Sweden's legal limit of 4 ng/L in force since 2026.
Are PFAS levels rising in Allonnes'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 Allonnes?
The water hardness in Allonnes is 29 °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 Allonnes, so in principle the same water.
Nearby communes
The closest to Allonnes 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=72003
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- LE MANS METROPOLE ESU
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.