Drinking water quality in Lésigny
PFAS in drinking water
The total of 20 PFAS ("forever chemicals") was last measured at <0,029 µg/L. The EU limit is 0.1 µg/L, so this water is at 0 % of the limit. (27 January 2026)
This source does not list each PFAS substance separately, so we cannot compare this water with the health limit.
Water report for Lésigny
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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. Toutefois, les valeurs en chlore mesurées sont trop faibles. Il est recommandé d'avoir des valeurs minimales de 0,10 mg/l sur l’ensemble du réseau de distribution.“
Values to watch
These values are at least halfway to their legal limit, or over it.
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 27.1 mg/L | ≤ 50 mg/L | within limit |
Show all 18 official measurements
| Parameter | Value | Limit | Status |
|---|---|---|---|
| Nitrate | 27.1 mg/L | ≤ 50 mg/L | within limit |
| Nitrite | <0,01 mg/L | ≤ 0.5 mg/L | within limit |
| Lead | 2 µg/L | ≤ 10 µg/L | within limit |
| Copper | 0.095 mg/L | ≤ 2 mg/L | within limit |
| Nickel | <5 µg/L | ≤ 20 µg/L | within limit |
| Chromium | <5 µg/L | ≤ 50 µg/L | within limit |
| Uranium | <10 µg/L | ≤ 30 µg/L | within limit |
| Fluoride | 0.17 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 | 7.6 unité pH | 6.5–9 unité pH | within limit |
| Water hardness | 28.2 °f | no limit | informational |
| Electrical conductivity | 647 µS/cm | 200–1,100 µS/cm | within limit |
| Chloride | 30.7 mg/L | ≤ 250 mg/L | within limit |
| Sulphate | 51 mg/L | ≤ 250 mg/L | within limit |
| Iron | <10 µg/L | ≤ 200 µg/L | within limit |
| Turbidity | <0,1 NFU | ≤ 2 NFU | within limit |
Frequently asked questions
Is tap water in Lésigny safe to drink?
Yes. The latest official test (30 June 2026) checked the tap water in Lésigny and it passed every requirement.
How high are PFAS levels in Lésigny's drinking water?
The total of 20 PFAS ("forever chemicals") was last measured at <0,029 µg/L. The EU limit is 0.1 µg/L, so this water is at 0 % of the limit. (below the EU limit)
How hard is the water in Lésigny?
The water hardness in Lésigny is 28.2 °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=77249
- License
- Licence Ouverte / Open Licence (Etalab)
- Retrieved
- 28 August 2026
- Supply networks
- LESIGNY A, LESIGNY D
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.