PFAS in Saint-Genouph's tap water: 11.1 ng/L, 22.2x our 0.5 ng/L benchmark
Last PFAS check: · Source: Hub'eau
PFAS in drinking water
22.2× 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 Tours, on the same distribution network as Saint-Genouph (TOURS (VILLE)). 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 97% of the cities we track
checked on 22 July 2026
20 PFAS (see each substance)
| PFAS substance | Value |
|---|---|
| Perfluorohexane sulfonate (PFHXS) | 0.0045 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | 0.0037 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.0035 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.0035 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.003 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.0022 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.002 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | 0.0018 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | 0.0007 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0015 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0015 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,0015 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0015 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,0015 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,0015 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
Above our health benchmark. Here are some filter options.
- EU legal limit
- 25 ng/L sum of 20 PFAS, below the 100 ng/L limit
- Last PFAS test
- 22 July 2026
- Water supplier
- VEOLIA EAU CGE
In Saint-Genouph, the 4 most closely watched PFAS (PFAS-4) add up to 11.1 ng/L (0.0111 µg/L) at the latest PFAS check on 22 July 2026. That's 22.2 times our 0.5 ng/L health benchmark, and above Sweden's legal limit of 4 ng/L. Sum of 20 PFAS: 25 ng/L (0.025 µg/L), below the EU legal limit (100 ng/L). Sampled in Tours, on the same network. 16 checks since 6 August 2024: sum of 20 PFAS up to 25 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 Saint-Genouph
16 PFAS checks since 6 August 2024, from the published measurements. Samples come from 2 distribution networks. The trend refers to the network “TOURS (VILLE)”.
“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 |
|---|---|---|---|---|
| 11.1 ng/L · calculated | 25 ng/L | Tours | TOURS (VILLE), LA RICHE ST GENOUPH (TOURS) | |
| 2.2 ng/L – < 4.2 ng/L · calculated | 7.7 ng/L | Tours | TOURS (VILLE) | |
| 1.8 ng/L – < 3.8 ng/L · calculated | 4.8 ng/L | Tours | TOURS (VILLE), LA RICHE ST GENOUPH (TOURS) | |
| 1.3 ng/L – < 3.8 ng/L · calculated | 1.8 ng/L | Tours | TOURS (VILLE) | |
| 0.9 ng/L – < 4.4 ng/L · calculated | 3.6 ng/L | Tours | TOURS (VILLE) | |
| 2.1 ng/L – < 4.6 ng/L · calculated | 7.5 ng/L | Tours | TOURS (VILLE) | |
| 12.8 ng/L – < 13.8 ng/L · calculated | 17 ng/L | Tours | TOURS (VILLE) | |
| < 12 ng/L · calculated | 2.2 ng/L | Tours | TOURS (VILLE) | |
| < 10 ng/L · calculated | < detection limit | Tours | TOURS (VILLE) | |
| < 10 ng/L · calculated | < detection limit | Tours | TOURS (VILLE) | |
| < 10 ng/L · calculated | < detection limit | Tours | TOURS (VILLE) | |
| < 10 ng/L · calculated | < detection limit | Tours | TOURS (VILLE) |
Show the 4 earlier checks (back to 6 August 2024)
| < 10 ng/L · calculated | < detection limit | Tours | TOURS (VILLE) | |
| 2.1 ng/L – < 10.1 ng/L · calculated | 2.1 ng/L | Tours | TOURS (VILLE) | |
| < 10 ng/L · calculated | 2.5 ng/L | Tours | TOURS (VILLE) | |
| 11.1 ng/L – < 13.1 ng/L · calculated | 15 ng/L | Tours | TOURS (VILLE) |
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 17 test results
| What was tested | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 9.4 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 | 0.0451 mg(Cu)/L | ≤ 2 mg(Cu)/L | within the limit |
| Nickel | 3.1 µg/L | ≤ 20 µg/L | within the limit |
| Cadmium | <0,010 µg/L | ≤ 5 µg/L | within the limit |
| Chromium | 0.6 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 | 7.5 unité pH | 6.5–9 unité pH | within the limit |
| Water hardness | 13 °f | no limit | for reference |
| Electrical conductivity | 350 µS/cm | 200–1,100 µS/cm | within the limit |
| Chloride | 19.4 mg/L | ≤ 250 mg/L | within the limit |
| Sulphate | 18.1 mg/L | ≤ 250 mg/L | within the limit |
| Iron | 3 µg/L | ≤ 200 µg/L | within the limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within the limit |
Frequently asked questions
Is tap water in Saint-Genouph safe to drink?
Yes. At the check on 22 July 2026, the tap water in Saint-Genouph was within every limit tested. “Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés. Ce contrôle fait suite aux résultats d'analyses non-conformes du prélèvement du 01/06/2026, en application de l'article R.1321-17 du code de la santé publique.”
How high are PFAS levels in Saint-Genouph's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 25 ng/L. The EU limit is 100 ng/L, so this water is at 25 % of the limit. (below the EU limit)
Does the water in Saint-Genouph also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 11.1 ng/L. That is 2.8 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 Saint-Genouph'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 Saint-Genouph?
The water hardness in Saint-Genouph is 13 °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 Saint-Genouph, so in principle the same water.
Nearby communes
The closest to Saint-Genouph 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=37219
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 21 September 2026
- Supply networks
- TOURS (VILLE), LA RICHE ST GENOUPH (TOURS)
Water report for Saint-Genouph
Get new PFAS results for Saint-Genouph, 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.