Drinking water quality in Tours
PFAS in drinking water
The total of 20 PFAS ("forever chemicals") was last measured at 0.0077 µg/L. The EU limit is 0.1 µg/L, so this water is at 8 % of the limit. (20 May 2026)
The four most harmful PFAS add up to 0.0022 µg/L, below the health limit of 0.004 µg/L used in Sweden since 2026.
One of these four, PFOA, is classified as causing cancer in humans by the WHO's cancer research agency (IARC).
Substances too small to measure count as 0, so the real total may be higher.
19 PFAS (see each substance)
| Acide perfluorobutanoïque (PFBA) | 0.0031 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.0014 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.0013 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.001 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.0009 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 perfluoro tridecane sulfonique (PFTrDS) | <0,0015 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,0015 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | <0,0015 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,001 µg/L |
| Acide sulfonique de perfluorooctane (PFOS) | <0,0015 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | <0,0005 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,0015 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,0015 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,001 µg/L |
Water report for Tours
Get the free water report for Tours, plus an alert whenever new official results are published.
Official assessment
The latest official test passed all quality requirements.
„Eau d'alimentation conforme aux exigences de qualité en vigueur pour l'ensemble des paramètres mesurés.“
Show all 21 official measurements
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 11 mg/L | ≤ 50 mg/L | within limit |
| Nitrite | <0,010 mg/L | ≤ 0.5 mg/L | within limit |
| Lead | 0.4 µg/L | ≤ 10 µg/L | within limit |
| Copper | 0.0037 mg(Cu)/L | ≤ 2 mg(Cu)/L | within limit |
| Nickel | 1 µg/L | ≤ 20 µg/L | within limit |
| Arsenic | 2.6 µg/L | ≤ 10 µg/L | within limit |
| Cadmium | <0,010 µg/L | ≤ 5 µg/L | within limit |
| Chromium | 0.4 µg/L | ≤ 50 µg/L | within limit |
| Uranium | 1.2 µg/L | ≤ 30 µg/L | within limit |
| Fluoride | 0.156 mg/L | ≤ 1.5 mg/L | within limit |
| Escherichia coli | <1 n/(100mL) | ≤ 0 mL) | within limit |
| Enterococci | <1 n/(100mL) | ≤ 0 mL) | within limit |
| Coliform bacteria | <1 n/(100mL) | ≤ 0 mL) | within limit |
| pH | 7.5 unité pH | 6.5–9 unité pH | within limit |
| Water hardness | 14.3 °f | no limit | informational |
| Electrical conductivity | 349 µS/cm | 180–1,000 µS/cm | within limit |
| Chloride | 21.1 mg/L | ≤ 250 mg/L | within limit |
| Sulphate | 21.4 mg/L | ≤ 250 mg/L | within limit |
| Sodium | 12.2 mg/L | ≤ 200 mg/L | within limit |
| Iron | 3 µg/L | ≤ 200 µg/L | within limit |
| Turbidity | <0,30 NFU | ≤ 2 NFU | within limit |
Frequently asked questions
Is tap water in Tours safe to drink?
Yes. The latest official test (23 June 2026) checked the tap water in Tours and it passed every requirement.
How high are PFAS levels in Tours's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 0.0077 µg/L. The EU limit is 0.1 µg/L, so this water is at 8 % of the limit. (below the EU limit)
Does the water in Tours also meet the strictest limits in Europe?
Yes. Even against Europe's strictest limit, the health limit of 0.004 µg/L used in Sweden since 2026, the measured value of 0.0022 µg/L stays below.
How hard is the water in Tours?
The water hardness in Tours is 14.3 °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 28 August 2026.
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=37261
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 August 2026
- Supply networks
- ST CYR SUR LOIRE, TOURS (VILLE)
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.