Drinking water quality in Saint-Laurent-de-Chamousset
PFAS in drinking water
The total of 20 PFAS ("forever chemicals") was last measured at 0.0625 µg/L. The EU limit is 0.1 µg/L, so this water is at 63 % of the limit. (15 December 2023)
The four most harmful PFAS add up to 0.0295 µg/L. That is 7.4 times the health limit of 0.004 µg/L that Sweden made law in 2026. Germany will set a similar limit in 2028.
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.
20 PFAS (see each substance)
| Acide sulfonique de perfluorooctane (PFOS) | 0.0145 µg/L |
| Acide perfluoropentanoïque (PFPEA) | 0.0114 µg/L |
| Acide perfluorohexanoïque (PFHXA) | 0.0094 µg/L |
| Acide perfluoro-octanoïque (PFOA) | 0.0083 µg/L |
| Acide perfluorobutanoïque (PFBA) | 0.0062 µg/L |
| Acide perfluoroheptanoïque (PFHPA) | 0.0046 µg/L |
| Perfluorohexane sulfonate (PFHXS) | 0.0039 µg/L |
| Acide perfluoro-nonanoïque (PFNA) | 0.0028 µg/L |
| Acide sulfonique de perfluorobutane (PFBS) | 0.0014 µg/L |
| Acide perfluoro undecanoïque (PFUnA) | <0,001 µg/L |
| Acide perfluorononane sulfonique (PFNS) | <0,01 µg/L |
| Acide perfluoroheptane sulfonique (PFHpS) | <0,001 µg/L |
| Acide perfluoropentane sulfonique (PFPS) | <0,001 µg/L |
| Acide perfluorododécane sulfonique (PFDoDS) | <0,01 µg/L |
| Acide perfluoro tridecane sulfonique (PFTrDS) | <0,01 µg/L |
| Acide perfluoro tridecanoique (PFTrDA) | <0,01 µg/L |
| Acide perfluorododécanoique (PFDoDA) | <0,001 µg/L |
| Acide perfluoro-decanoïque (PFDA) | <0,001 µg/L |
| Acide perfluoro undecane sulfonique (PFUnDS) | <0,01 µg/L |
| Acide perfluorodecane sulfonique (PFDS) | <0,01 µg/L |
Water report for Saint-Laurent-de-Chamousset
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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 14 official measurements
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 23.9 mg/L | ≤ 50 mg/L | within limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within limit |
| Cadmium | <1 µg/L | ≤ 5 µg/L | within limit |
| Chromium | <5 µg/L | ≤ 50 µg/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 | 7.4 unité pH | 6.5–9 unité pH | within limit |
| Water hardness | 16.09 °f | no limit | informational |
| Electrical conductivity | 387 µS/cm | 200–1,100 µS/cm | within limit |
| Chloride | 22 mg/L | ≤ 250 mg/L | within limit |
| Sulphate | 28.8 mg/L | ≤ 250 mg/L | within limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within limit |
| Turbidity | 0.12 NFU | ≤ 2 NFU | within limit |
Frequently asked questions
Is tap water in Saint-Laurent-de-Chamousset safe to drink?
Yes. The latest official test (28 April 2026) checked the tap water in Saint-Laurent-de-Chamousset and it passed every requirement.
How high are PFAS levels in Saint-Laurent-de-Chamousset's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at 0.0625 µg/L. The EU limit is 0.1 µg/L, so this water is at 63 % of the limit. (below the EU limit)
Does the water in Saint-Laurent-de-Chamousset also meet the strictest limits in Europe?
No. The four most harmful PFAS add up to 0.0295 µg/L. That is 7.4 times the health limit of 0.004 µg/L that Sweden made law in 2026. The water still passes the current EU limit (0.1 µg/L for the total of 20 PFAS).
How hard is the water in Saint-Laurent-de-Chamousset?
The water hardness in Saint-Laurent-de-Chamousset is 16.09 °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 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=69220
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 August 2026
- Supply networks
- MONTS DU LYONNAIS
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.