Drinking water in 1957 (Switzerland)
One supply zone, water supplier: Service des eaux d'Ardon.
The values come from the SVGW platform trinkwasser.ch. Water utilities report there voluntarily; the SVGW does not verify the data. For each parameter, the minimum, maximum, average and median of one year are published; hardness in French degrees (°fH). On 20 August 2026 the SVGW objected in writing to the use of this data for maunawai.info: we do not show values from this source, but only name the parameters measured there. Analyses we obtained directly from the water supplier are shown in full.
How to read the share of the parametric value
Several samples per year: for chemical parameters the mean value is given, for microbiological ones the highest measured value. There the parametric value is zero — a single finding would disappear in the average, and it is precisely that finding which is the information. Which reference applies is stated in the last column of the table.
605 - ARDON / Lieu de prélèvement 3 - Fontaine de la Pontaise; Rue du Château
Service des eaux d'ArdonAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
These values are more than a year old. The most recent analysis the water supplier has published for this zone dates from 26/05/2025. We have no newer values — which is why we show the latest available ones rather than none at all. They say nothing about how the water has changed since then.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Lead | < 0.1 µg/L below limit of quantification | 10 µg/l | < 1 % * | Single value |
* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.
Show all recorded parameters (40 — most recent value per parameter)
Chemical parameters (11)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Antimony | < 0.2 µg/L below limit of quantification | 5 µg/l | < 4 % * | Single value |
| Arsenic | < 0.2 µg/L below limit of quantification | 10 µg/l | < 2 % * | Single value |
| Boron | 3.4 µg/L | 1 mg/l | 0.3 % | Single value |
| Cadmium | < 0.1 µg/L below limit of quantification | 3 µg/l | < 3 % * | Single value |
| Chromium | < 0.2 µg/L below limit of quantification | 50 µg/l | < 0.4 % * | Single value |
| Copper | 0.6 µg/L | 1 mg/l | < 0.1 % | Single value |
| Lead | < 0.1 µg/L below limit of quantification | 10 µg/l | < 1 % * | Single value |
| Mercury | < 0.02 µg/L below limit of quantification | 1 µg/l | < 2 % * | Single value |
| Nickel | < 0.2 µg/L below limit of quantification | 20 µg/l | < 1 % * | Single value |
| Selenium | < 0.2 µg/L below limit of quantification | 10 µg/l | < 2 % * | Single value |
| Uranium | 0.3 µg/L | 30 µg/l | 1 % | Single value |
* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.
PFAS (21)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Perfluorobutane sulfonic acid (PFBS) | non décelé not detectable | — | — | Single value |
| Perfluorobutanoic acid (PFBA) | non décelé not detectable | — | — | Single value |
| Perfluorodecane sulfonic acid (PFDS) | non décelé not detectable | — | — | Single value |
| Perfluorodecanoic acid (PFDA) | non décelé not detectable | — | — | Single value |
| Perfluorododecane sulfonic acid (PFDoDS) | non décelé not detectable | — | — | Single value |
| Perfluorododecanoic acid (PFDoDA) | non décelé not detectable | — | — | Single value |
| Perfluoroheptane sulfonic acid (PFHpS) | non décelé not detectable | — | — | Single value |
| Perfluoroheptanoic acid (PFHpA) | non décelé not detectable | — | — | Single value |
| Perfluorohexane sulfonic acid (PFHxS) | non décelé not detectable Unit not stated in the document | 0.3 µg/l | — | Single value |
| Perfluorohexanoic acid (PFHxA) | non décelé not detectable | — | — | Single value |
| Perfluorononane sulfonic acid (PFNS) | non décelé not detectable | — | — | Single value |
| Perfluorononanoic acid (PFNA) | non décelé not detectable | — | — | Single value |
| Perfluorooctanesulfonic acid (PFOS) | non décelé not detectable Unit not stated in the document | 0.3 µg/l | — | Single value |
| Perfluorooctanoic acid (PFOA) | non décelé not detectable Unit not stated in the document | 0.5 µg/l | — | Single value |
| Perfluoropentanesulfonic acid (PFPeS) | non décelé not detectable | — | — | Single value |
| Perfluoropentanoic acid (PFPeA) | non décelé not detectable | — | — | Single value |
| Perfluorotridecanesulfonic acid (PFTrDS) | non décelé not detectable | — | — | Single value |
| Perfluorotridecanoic acid (PFTrDA) | non décelé not detectable | — | — | Single value |
| Perfluoroundecanesulfonic acid (PFUnDS) | non décelé not detectable | — | — | Single value |
| Perfluoroundecanoic acid (PFUnDA) | non décelé not detectable | — | — | Single value |
| PFAS Total | non décelé not detectable | — | — | Single value |
Indicator parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | 2.1 µg/L | 0.2 mg/l | 1 % | Single value |
| Iron | < 0.02 mg/L below limit of quantification | 0.2 mg/l | < 10 % * | Single value |
| Manganese | < 0.2 µg/L below limit of quantification | 50 µg/l | < 0.4 % * | Single value |
* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.
Further parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Barium | 5.4 µg/L | — | — | Single value |
| Cobalt | < 0.1 µg/L below limit of quantification | — | — | Single value |
| Silver | < 0.2 µg/L below limit of quantification | 0.1 mg/l | < 0.2 % * | Single value |
| Strontium | 0.4 mg/L | — | — | Single value |
| Zinc | 1.4 µg/L | 5 mg/l | < 0.1 % | Single value |
* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.
Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.
Frequent questions about postcode 1957
- Who supplies the drinking water in Postcode 1957?
- Service des eaux d'Ardon. The values shown here come from the supply zone 605 - ARDON / Lieu de prélèvement 3 - Fontaine de la Pontaise; Rue du Château and apply to the water the supplier delivers. What happens between the building connection and the tap — in old lead pipes, for example — is not covered by these analyses; information on that is provided by owners, the health authority or an examination by an accredited laboratory.
General questions — how current the data is, limit of quantification, parametric values, who is behind this site — are answered under Questions & answers.