PFAS in La Membrolle-sur-Choisille's tap water: 4.9 ng/L, 9.8x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
9.8× 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.
Sample taken in Saint-Cyr-sur-Loire, on the same distribution network as La Membrolle-sur-Choisille (ST CYR SUR LOIRE). 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.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
More PFAS than in 92% of the cities we track
checked on 8 June 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Acide perfluoropentanoïque (PFPEA) | 0.0037 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.0034 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.0027 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.0019 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.0015 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.001 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | 0.0005 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0015 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,0015 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0015 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0015 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | <0,002 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0015 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0015 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 15 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 8 June 2026
- Water supplier
- TOURS METROPOLE VAL DE LOIRE
In La Membrolle-sur-Choisille, the 4 most closely watched PFAS (PFAS-4) add up to 4.9 ng/L (0.0049 µg/L) at the latest PFAS check on 8 June 2026. That's 9.8 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 15 ng/L (0.015 µg/L), below the EU legal limit (100 ng/L). Sampled in Saint-Cyr-sur-Loire, on the same network. 8 checks since 13 May 2024: sum of 20 PFAS up to 18 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 La Membrolle-sur-Choisille
8 PFAS checks since 13 May 2024, from the published measurements. Samples from 2 communes on the same network: it's the same water, so each one applies to La Membrolle-sur-Choisille.
“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 |
|---|---|---|---|
| 4.9 ng/L · calculated | 15 ng/L | Saint-Cyr-sur-Loire | |
| 1.3 ng/L – < 3.8 ng/L · calculated | 2.2 ng/L | La Membrolle-sur-Choisille | |
| 3 ng/L – < 5 ng/L · calculated | 18 ng/L | Saint-Cyr-sur-Loire | |
| 2.9 ng/L – < 5.4 ng/L · calculated | 10 ng/L | Saint-Cyr-sur-Loire | |
| 5.9 ng/L – < 6.4 ng/L · calculated | 15 ng/L | Saint-Cyr-sur-Loire | |
| < 10 ng/L · calculated | < detection limit | Saint-Cyr-sur-Loire | |
| < 10 ng/L · calculated | < detection limit | Saint-Cyr-sur-Loire | |
| < 10 ng/L · calculated | < detection limit | Saint-Cyr-sur-Loire |
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 | 9.7 mg/L | ≤ 50 mg/L | within the limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within the limit |
| Lead | <0,2 µg/L | ≤ 10 µg/L | within the limit |
| Copper | 0.0282 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 0.4 µg/L | ≤ 20 µg/L | within the limit |
| Arsenic | 2.5 µg/L | ≤ 10 µg/L | within the limit |
| Cadmium | <0,010 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | 0.4 µg/L | ≤ 50 µg/L | within the limit |
| Uranium | 0.8 µg/L | ≤ 30 µg/L | within the limit |
| Fluoride | 0.18 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 | 7.79 unité pH | 6.5–9.5 pH | within the limit |
| Water hardness | 12.2 °f | no limit | for reference |
| Electrical conductivity | 288 µS/cm | 180–1,000 µS/cm | within the limit |
| Chloride | 17.5 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 16.4 mg/L | ≤ 250 mg/L | within the limit |
| Sodium | 11.6 mg/L | ≤ 200 mg/L | within the limit |
| Iron | <1 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in La Membrolle-sur-Choisille safe to drink?
Yes. At the check on 8 June 2026, the tap water in La Membrolle-sur-Choisille 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 La Membrolle-sur-Choisille's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 15 ng/L. The EU limit is 100 ng/L, so this water is at 15 % of the limit. (below the EU limit)
Does the water in La Membrolle-sur-Choisille also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 4.9 ng/L. That is 1.23 times Sweden's legal limit of 4 ng/L, in force since 2026. Germany will set a similar one in 2028. The water still passes the current EU legal limit (100 ng/L for the total of 20 PFAS).
Are PFAS levels rising in La Membrolle-sur-Choisille'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 La Membrolle-sur-Choisille?
The water hardness in La Membrolle-sur-Choisille is 12.2 °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 La Membrolle-sur-Choisille, so in principle the same water.
Nearby communes
The closest to La Membrolle-sur-Choisille 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=37151
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- ST CYR SUR LOIRE
Water report for La Membrolle-sur-Choisille
Get new PFAS results for La Membrolle-sur-Choisille, 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.