Drinking water in 1135 (Switzerland)
The drinking water in Postcode 1135 has a total hardness of 18.1 °dH. Nitrate reaches 13.0 mg/l, the statutory parametric value is 40 mg/l. Measured in supply zone Communes de Denens & Villars-sous-Yens of Association intercommunale des eaux du Boiron (AIEB), retrieved on 12/08/2026.
One supply zone, water supplier: Association intercommunale des eaux du Boiron (AIEB).
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.
Communes de Denens & Villars-sous-Yens
Association intercommunale des eaux du Boiron (AIEB)Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 13.0 mg/l | 40 mg/l | 33 % | Single value |
| Escherichia coli (E. coli) | Non décelé UFC/ml not detectable | 0/100 ml | — | Single value |
| Sulphate | 15 mg/l | — | — | Single value |
| Sodium | 5.5 mg/l | 200 mg/l | 3 % | Single value |
Show all recorded parameters (23 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | Non décelé UFC/ml not detectable | 300 1/ml | — | Single value |
| Escherichia coli (E. coli) | Non décelé UFC/ml not detectable | 0/100 ml | — | Single value |
| Intestinal enterococci | Non décelé UFC/ml not detectable | 0/100 ml | — | Single value |
Chemical parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Fluoride | <0.10 mg/l below limit of quantification | 1.5 mg/l | < 7 % * | Single value |
| Nitrate | 13.0 mg/l | 40 mg/l | 33 % | Single value |
| Nitrite | Non décelé mg/l not detectable | 0.1 mg/l | — | 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 (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of 4 PFAS | Non mesuré ng/l not determined | — | — | Single value |
Metabolites (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorothalonil metabolite R417888 | <0,020 µg/l below limit of quantification | 0.1 µg/l | < 20 % * | Single value |
| Chlorothalonil metabolite R471811 | <0,050 µg/l below limit of quantification | 0.1 µg/l | < 50 % * | 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.
Indicator parameters (8)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Ammonium | Non décelé mg/l not detectable | 0.5 mg/l | — | Single value |
| Chloride | 6.4 mg/l | — | — | Single value |
| pH | 7.5 | — | — | Single value |
| Sodium | 5.5 mg/l | 200 mg/l | 3 % | Single value |
| Sulphate | 15 mg/l | — | — | Single value |
| Temperature | 16.0 °C | — | — | Single value |
| Total organic carbon (TOC) | 0.8 mg C/l | — | — | Single value |
| Turbidity | 0.1 NTU | — | — | Single value |
Further parameters (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Bromide | Non décelé µg/l not detectable | — | — | Single value |
| Calcium | 98 mg/l | — | — | Single value |
| Carbonate hardness | 26.8 °f | — | — | Single value |
| Magnesium | 10.6 mg/l | — | — | Single value |
| Potassium | 1.2 mg/l | — | — | Single value |
| Total hardness | 32.4 °f | — | — | Single 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 1135
- How hard is the water in Postcode 1135?
- Association intercommunale des eaux du Boiron (AIEB) publishes a total hardness of 32.4 °f for the supply zone Communes de Denens & Villars-sous-Yens — that corresponds to 18.1 °dH. Hardness indicates how much calcium and magnesium are dissolved in the water. It is not a quality assessment: there is no parametric value for hardness. Basis: Lully, décembre 2025, retrieved on 12/08/2026.
- How much nitrate is in the drinking water in Postcode 1135?
- Association intercommunale des eaux du Boiron (AIEB) publishes a nitrate value of 13.0 mg/l for the supply zone Communes de Denens & Villars-sous-Yens. The statutory parametric value is 40 mg/l; the measured value represents 33 % of the parametric value. Basis: Lully, décembre 2025, retrieved on 12/08/2026.
- Who supplies the drinking water in Postcode 1135?
- Association intercommunale des eaux du Boiron (AIEB). The values shown here come from the supply zone Communes de Denens & Villars-sous-Yens 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.