Drinking water in 6004 (Switzerland)
The drinking water in Postcode 6004 has a total hardness of 6.6 °dH. Nitrate reaches 2.7 mg/l, the statutory parametric value is 40 mg/l. Measured in supply zone QWW Sonnenberg, Quellwasser roh of ewl (Energie Wasser Luzern), retrieved on 08/07/2026.
For this postcode ewl (Energie Wasser Luzern) publishes several supply zones. Which of them serves an individual address is not published — below are the values of the zone with the most documented parameters, the remaining 8 underneath.
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.
QWW Sonnenberg, Quellwasser roh
ewl (Energie Wasser Luzern)Assigned 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 06/05/2025. 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 |
|---|---|---|---|---|
| Nitrate | 2.7 mg/l | 40 mg/l | 7 % | Single value · QWW Sonnenberg, Quellwasser roh |
| Escherichia coli (E. coli) | nn KBE/100 ml not detectable | 0/100 ml | — | Single value · QWW Sonnenberg, Quellwasser roh |
| Sulphate | 7.4 mg/l | — | — | Single value · QWW Sonnenberg, Quellwasser roh |
Show all recorded parameters (16 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 53 KBE/ml | 300 1/ml | — | Single value · QWW Sonnenberg, Quellwasser roh |
| Escherichia coli (E. coli) | nn KBE/100 ml not detectable | 0/100 ml | — | Single value · QWW Sonnenberg, Quellwasser roh |
| Intestinal enterococci | nn KBE/100 ml not detectable | 0/100 ml | — | Single value · QWW Sonnenberg, Quellwasser roh |
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 2.7 mg/l | 40 mg/l | 7 % | Single value · QWW Sonnenberg, Quellwasser roh |
| Nitrite | <0.006 mg/l below limit of quantification | 0.1 mg/l | < 6 % * | Single value · QWW Sonnenberg, Quellwasser roh |
* 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 (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Ammonium | <0.01 mg/l below limit of quantification | 0.5 mg/l | < 2 % * | Single value · QWW Sonnenberg, Quellwasser roh |
| Chloride | <1.0 mg/l below limit of quantification | — | — | Single value · QWW Sonnenberg, Quellwasser roh |
| Oxidisability | 4.7 mg/l | — | — | Single value · QWW Sonnenberg, Quellwasser roh |
| Sulphate | 7.4 mg/l | — | — | Single value · QWW Sonnenberg, Quellwasser roh |
| Turbidity | 0.75 NTU | — | — | Single value · QWW Sonnenberg, Quellwasser roh |
* 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 (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 42 mg/l | — | — | Single value · QWW Sonnenberg, Quellwasser roh |
| Carbonate hardness | 10.8 °fH | — | — | Single value · QWW Sonnenberg, Quellwasser roh |
| Hydrogen carbonate | 132 mg/l | — | — | Single value · QWW Sonnenberg, Quellwasser roh |
| Magnesium | 3.1 mg/l | — | — | Single value · QWW Sonnenberg, Quellwasser roh |
| Non-carbonate hardness | 0.9 °fH | — | — | Single value · QWW Sonnenberg, Quellwasser roh |
| Total hardness | 11.7 °fH | — | — | Single value · QWW Sonnenberg, Quellwasser roh |
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.
Show 8 more supply zones in this postcode
Grundwasser
ewl (Energie Wasser Luzern)Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
No date is given for these values. The water supplier publishes the analysis without a sampling date and without a report date. When the water was examined is not apparent from the source — we do not add a date and we do not estimate one. What is stated is therefore only when we retrieved the document.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 9 mg/l | 40 mg/l | 23 % | Mean · Grundwasser |
| Sulphate | 11.2 mg/l | — | — | Mean · Grundwasser |
| Sodium | 7.6 mg/l | 200 mg/l | 4 % | Mean · Grundwasser |
Show all recorded parameters (17 — most recent value per parameter)
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 9 mg/l | 40 mg/l | 23 % | Mean · Grundwasser |
| Nitrite | <0.005 mg/l below limit of quantification | 0.1 mg/l | < 5 % * | Mean · Grundwasser |
* 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 (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Ammonium | <0.03 mg/l below limit of quantification | 0.5 mg/l | < 6 % * | Mean · Grundwasser |
| Chloride | 8.6 mg/l | — | — | Mean · Grundwasser |
| Conductivity (25 °C) | 486 μs/cm | — | — | Mean · Grundwasser |
| pH | 7.3 | — | — | Mean · Grundwasser |
| Sodium | 7.6 mg/l | 200 mg/l | 4 % | Mean · Grundwasser |
| Sulphate | 11.2 mg/l | — | — | Mean · Grundwasser |
* 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 (9)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 96 mg/l | — | — | Mean · Grundwasser |
| Carbonate hardness | 26.7 fH° | — | — | Mean · Grundwasser |
| Hydrogen carbonate | 326 mg/l | — | — | Mean · Grundwasser |
| Magnesium | 8.9 mg/l | — | — | Mean · Grundwasser |
| Non-carbonate hardness | 1 fH° | — | — | Mean · Grundwasser |
| Oxygen | 5.4 mg/l | — | — | Mean · Grundwasser |
| Phosphate | 0.003 mg/l | 1 mg/l | 0.3 % | Mean · Grundwasser |
| Potassium | 2.6 mg/l | — | — | Mean · Grundwasser |
| Total hardness | 27.7 fH° | — | — | Mean · Grundwasser |
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.
Quellwasser
ewl (Energie Wasser Luzern)Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
No date is given for these values. The water supplier publishes the analysis without a sampling date and without a report date. When the water was examined is not apparent from the source — we do not add a date and we do not estimate one. What is stated is therefore only when we retrieved the document.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 3.6 mg/l | 40 mg/l | 9 % | Mean · Quellwasser |
| Sulphate | 9.1 mg/l | — | — | Mean · Quellwasser |
| Sodium | 1.7 mg/l | 200 mg/l | 0.8 % | Mean · Quellwasser |
Show all recorded parameters (17 — most recent value per parameter)
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 3.6 mg/l | 40 mg/l | 9 % | Mean · Quellwasser |
| Nitrite | <0.005 mg/l below limit of quantification | 0.1 mg/l | < 5 % * | Mean · Quellwasser |
* 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 (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Ammonium | <0.03 mg/l below limit of quantification | 0.5 mg/l | < 6 % * | Mean · Quellwasser |
| Chloride | 1.1 mg/l | — | — | Mean · Quellwasser |
| Conductivity (25 °C) | 254 μs/cm | — | — | Mean · Quellwasser |
| pH | 8.1 | — | — | Mean · Quellwasser |
| Sodium | 1.7 mg/l | 200 mg/l | 0.8 % | Mean · Quellwasser |
| Sulphate | 9.1 mg/l | — | — | Mean · Quellwasser |
* 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 (9)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 53 mg/l | — | — | Mean · Quellwasser |
| Carbonate hardness | 13.8 fH° | — | — | Mean · Quellwasser |
| Hydrogen carbonate | 168 mg/l | — | — | Mean · Quellwasser |
| Magnesium | 3.7 mg/l | — | — | Mean · Quellwasser |
| Non-carbonate hardness | 0.9 fH° | — | — | Mean · Quellwasser |
| Oxygen | 11.3 mg/l | — | — | Mean · Quellwasser |
| Phosphate | 0.003 mg/l | 1 mg/l | 0.3 % | Mean · Quellwasser |
| Potassium | 1 mg/l | — | — | Mean · Quellwasser |
| Total hardness | 14.7 fH° | — | — | Mean · Quellwasser |
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.
Seewasser
ewl (Energie Wasser Luzern)Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
No date is given for these values. The water supplier publishes the analysis without a sampling date and without a report date. When the water was examined is not apparent from the source — we do not add a date and we do not estimate one. What is stated is therefore only when we retrieved the document.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 2.7 mg/l | 40 mg/l | 7 % | Mean · Seewasser |
| Sulphate | 14 mg/l | — | — | Mean · Seewasser |
| Sodium | 2.5 mg/l | 200 mg/l | 1 % | Mean · Seewasser |
Show all recorded parameters (17 — most recent value per parameter)
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 2.7 mg/l | 40 mg/l | 7 % | Mean · Seewasser |
| Nitrite | <0.005 mg/l below limit of quantification | 0.1 mg/l | < 5 % * | Mean · Seewasser |
* 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 (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Ammonium | <0.03 mg/l below limit of quantification | 0.5 mg/l | < 6 % * | Mean · Seewasser |
| Chloride | 2.6 mg/l | — | — | Mean · Seewasser |
| Conductivity (25 °C) | 214 μs/cm | — | — | Mean · Seewasser |
| pH | 7.8 | — | — | Mean · Seewasser |
| Sodium | 2.5 mg/l | 200 mg/l | 1 % | Mean · Seewasser |
| Sulphate | 14 mg/l | — | — | Mean · Seewasser |
* 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 (9)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 41 mg/l | — | — | Mean · Seewasser |
| Carbonate hardness | 10.4 fH° | — | — | Mean · Seewasser |
| Hydrogen carbonate | 126 mg/l | — | — | Mean · Seewasser |
| Magnesium | 3.7 mg/l | — | — | Mean · Seewasser |
| Non-carbonate hardness | 1.4 fH° | — | — | Mean · Seewasser |
| Oxygen | 13.3 mg/l | — | — | Mean · Seewasser |
| Phosphate | 0.002 mg/l | 1 mg/l | 0.2 % | Mean · Seewasser |
| Potassium | 1 mg/l | — | — | Mean · Seewasser |
| Total hardness | 11.7 fH° | — | — | Mean · Seewasser |
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.
Kreuzbuch, Abgang 700
ewl (Energie Wasser Luzern)Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
No core values are available for this zone yet.
QWW Sonnenberg, Abgang Kammer 1
ewl (Energie Wasser Luzern)Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
No core values are available for this zone yet.
Seewasser roh (Einlauf Salzfass 600)
ewl (Energie Wasser Luzern)Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
No core values are available for this zone yet.
PW Thorenberg, linkes Ufer
ewl (Energie Wasser Luzern)Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
No core values are available for this zone yet.
PW Thorenberg, rechtes Ufer
ewl (Energie Wasser Luzern)Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
No core values are available for this zone yet.
Frequent questions about postcode 6004
- How hard is the water in Postcode 6004?
- ewl (Energie Wasser Luzern) publishes a total hardness of 11.7 °fH for the supply zone QWW Sonnenberg, Quellwasser roh — that corresponds to 6.6 °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: Luzern, 7. Mai 2025, retrieved on 08/07/2026.
- How much nitrate is in the drinking water in Postcode 6004?
- ewl (Energie Wasser Luzern) publishes a nitrate value of 2.7 mg/l for the supply zone QWW Sonnenberg, Quellwasser roh. The statutory parametric value is 40 mg/l; the measured value represents 7 % of the parametric value. Basis: Luzern, 7. Mai 2025, retrieved on 08/07/2026.
- Who supplies the drinking water in Postcode 6004?
- ewl (Energie Wasser Luzern). The values shown here come from the supply zone QWW Sonnenberg, Quellwasser roh 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.