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Drinking water in Baar, Sihlbrugg

8 supply zones — values can differ depending on the district. Below is the zone with the most documented parameters, the others collapsed underneath. To determine the exact match, look up the postcode.

How to read the share of the parametric value

12 % Share of the parametric value. The proportion of the permitted maximum that the measured value uses — here 12 %, so just over an eighth.
< 10 % * Below the limit of quantification. The substance was not detectable. The mark shows where the detection limit lies relative to the parametric value — the actual share of the parametric value is below that.

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.

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 31/12/2024. 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.

Water hardness
13.4 °dH
Hardness range medium
Key values Arbach
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 6.3 mg/l 40 mg/l
16 %
Mean · Arbach
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Arbach
Show all recorded parameters (9 — most recent value per parameter)

Microbiology (3)

Microbiology – Arbach
Parameter Value Parametric value Share of the parametric value Reference
Aerobic mesophilic bacteria 0 KBE/ml 300 1/ml Mean · Arbach
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Arbach
Intestinal enterococci nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Arbach

Chemical parameters (1)

Chemical parameters – Arbach
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 6.3 mg/l 40 mg/l
16 %
Mean · Arbach

Indicator parameters (2)

Indicator parameters – Arbach
Parameter Value Parametric value Share of the parametric value Reference
Temperature 13.1 °C Mean · Arbach
Turbidity 0.17 TE/F Mean · Arbach

Further parameters (3)

Further parameters – Arbach
Parameter Value Parametric value Share of the parametric value Reference
Calcium 67.5 mg/l Mean · Arbach
Magnesium 17.4 mg/l Mean · Arbach
Total hardness 24 °fH Mean · Arbach

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.

Source: https://trinkwasser.ch/de/versorger/916/wasserversorgung-arbach-ag/2753/arbach · 2024 · 2024 · retrieved on 07/08/2026

Postcodes in this zone: 6340

Show 7 more supply zones

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

Water hardness
17.5 °dH
Hardness range hard
Key values Baar
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 12.3 mg/l 40 mg/l
31 %
Mean · Baar
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Baar
Show all recorded parameters (9 — most recent value per parameter)

Microbiology (3)

Microbiology – Baar
Parameter Value Parametric value Share of the parametric value Reference
Aerobic mesophilic bacteria 37 KBE/ml 300 1/ml Mean · Baar
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Baar
Intestinal enterococci nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Baar

Chemical parameters (1)

Chemical parameters – Baar
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 12.3 mg/l 40 mg/l
31 %
Mean · Baar

Indicator parameters (2)

Indicator parameters – Baar
Parameter Value Parametric value Share of the parametric value Reference
Chloride 13 mg/l Mean · Baar
pH 7.42 Mean · Baar

Further parameters (3)

Further parameters – Baar
Parameter Value Parametric value Share of the parametric value Reference
Calcium 101.5 mg/l Mean · Baar
Magnesium 14.3 mg/l Mean · Baar
Total hardness 31.2 °fH Mean · Baar

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.

Source: https://trinkwasser.ch/de/versorger/711/korporation-baar-dorf/3025/baar · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 6340

Blickensdorf und Früeberg

Korporation Blickensdorf

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

Water hardness
17.2 °dH
Hardness range hard
Key values Blickensdorf und Früeberg
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 15.2 mg/l 40 mg/l
38 %
Mean · Blickensdorf und Früeberg
Show all recorded parameters (5 — most recent value per parameter)

Microbiology (1)

Microbiology – Blickensdorf und Früeberg
Parameter Value Parametric value Share of the parametric value Reference
Aerobic mesophilic bacteria 16 KBE/ml 300 1/ml Mean · Blickensdorf und Früeberg

Chemical parameters (1)

Chemical parameters – Blickensdorf und Früeberg
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 15.2 mg/l 40 mg/l
38 %
Mean · Blickensdorf und Früeberg

Further parameters (3)

Further parameters – Blickensdorf und Früeberg
Parameter Value Parametric value Share of the parametric value Reference
Calcium 102.3 mg/l Mean · Blickensdorf und Früeberg
Magnesium 12.6 mg/l Mean · Blickensdorf und Früeberg
Total hardness 30.7 °fH Mean · Blickensdorf und Früeberg

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.

Postcodes in this zone: 6340

Cham Hagendorn und Hünenberg

WWZ AG

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

Water hardness
14.6 °dH
Hardness range hard
Key values Cham Hagendorn und Hünenberg
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 14.89 mg/l 40 mg/l
37 %
Mean · Cham Hagendorn und Hünenberg
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Cham Hagendorn und Hünenberg
Sulphate 18.38 mg/l Mean · Cham Hagendorn und Hünenberg
Sodium 5.95 mg/l 200 mg/l
3 %
Mean · Cham Hagendorn und Hünenberg
Show all recorded parameters (21 — most recent value per parameter)

Microbiology (3)

Microbiology – Cham Hagendorn und Hünenberg
Parameter Value Parametric value Share of the parametric value Reference
Aerobic mesophilic bacteria 17 KBE/ml 300 1/ml Mean · Cham Hagendorn und Hünenberg
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Cham Hagendorn und Hünenberg
Intestinal enterococci nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Cham Hagendorn und Hünenberg

Chemical parameters (1)

Chemical parameters – Cham Hagendorn und Hünenberg
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 14.89 mg/l 40 mg/l
37 %
Mean · Cham Hagendorn und Hünenberg

PFAS (3)

PFAS – Cham Hagendorn und Hünenberg
Parameter Value Parametric value Share of the parametric value Reference
Perfluorohexane sulfonic acid (PFHxS) < 0.002 µg/l
below limit of quantification
0.3 µg/l
< 0.7 % *
Mean · Cham Hagendorn und Hünenberg
Perfluorooctanesulfonic acid (PFOS) < 0.001 µg/l
below limit of quantification
0.3 µg/l
< 0.3 % *
Mean · Cham Hagendorn und Hünenberg
Perfluorooctanoic acid (PFOA) < 0.001 µg/l
below limit of quantification
0.5 µg/l
< 0.2 % *
Mean · Cham Hagendorn und Hünenberg

* 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.

Metabolites (2)

Metabolites – Cham Hagendorn und Hünenberg
Parameter Value Parametric value Share of the parametric value Reference
Chlorothalonil metabolite R417888 0.02 µg/l 0.1 µg/l
20 %
Mean · Cham Hagendorn und Hünenberg
Chlorothalonil metabolite R471811 0.04 µg/l 0.1 µg/l
40 %
Mean · Cham Hagendorn und Hünenberg

Indicator parameters (8)

Indicator parameters – Cham Hagendorn und Hünenberg
Parameter Value Parametric value Share of the parametric value Reference
Chloride 7.15 mg/l Mean · Cham Hagendorn und Hünenberg
Conductivity (25 °C) 462.83 µS/cm Mean · Cham Hagendorn und Hünenberg
Iron 0.01 mg/l 0.2 mg/l
5 %
Mean · Cham Hagendorn und Hünenberg
Manganese 0 mg/l 50 µg/l
0 %
Mean · Cham Hagendorn und Hünenberg
pH 7.39 Mean · Cham Hagendorn und Hünenberg
Sodium 5.95 mg/l 200 mg/l
3 %
Mean · Cham Hagendorn und Hünenberg
Sulphate 18.38 mg/l Mean · Cham Hagendorn und Hünenberg
Turbidity 0.14 TE/F Mean · Cham Hagendorn und Hünenberg

Further parameters (4)

Further parameters – Cham Hagendorn und Hünenberg
Parameter Value Parametric value Share of the parametric value Reference
Calcium 90.8 mg/l Mean · Cham Hagendorn und Hünenberg
Magnesium 8.43 mg/l Mean · Cham Hagendorn und Hünenberg
Potassium 2.66 mg/l Mean · Cham Hagendorn und Hünenberg
Total hardness 26.1 °fH Mean · Cham Hagendorn und Hünenberg

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.

Postcodes in this zone: 6340

Hochdorf

WWZ AG

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

Water hardness
21.8 °dH
Hardness range hard
Key values Hochdorf
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 27.9 mg/l 40 mg/l
70 %
Mean · Hochdorf
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Hochdorf
Sulphate 15.2 mg/l Mean · Hochdorf
Sodium 10 mg/l 200 mg/l
5 %
Mean · Hochdorf
Show all recorded parameters (22 — most recent value per parameter)

Microbiology (3)

Microbiology – Hochdorf
Parameter Value Parametric value Share of the parametric value Reference
Aerobic mesophilic bacteria 4 KBE/ml 300 1/ml Mean · Hochdorf
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Hochdorf
Intestinal enterococci nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Hochdorf

Chemical parameters (1)

Chemical parameters – Hochdorf
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 27.9 mg/l 40 mg/l
70 %
Mean · Hochdorf

PFAS (3)

PFAS – Hochdorf
Parameter Value Parametric value Share of the parametric value Reference
Perfluorohexane sulfonic acid (PFHxS) < 0.001 µg/l
below limit of quantification
0.3 µg/l
< 0.3 % *
Mean · Hochdorf
Perfluorooctanesulfonic acid (PFOS) < 0.001 µg/l
below limit of quantification
0.3 µg/l
< 0.3 % *
Mean · Hochdorf
Perfluorooctanoic acid (PFOA) < 0.001 µg/l
below limit of quantification
0.5 µg/l
< 0.2 % *
Mean · Hochdorf

* 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.

Metabolites (2)

Metabolites – Hochdorf
Parameter Value Parametric value Share of the parametric value Reference
Chlorothalonil metabolite R417888 0.03 µg/l 0.1 µg/l
30 %
Mean · Hochdorf
Chlorothalonil metabolite R471811 0.34 µg/l 0.1 µg/l
340 % Mean above the parametric value
Mean · Hochdorf

Annual means and medians are not individual measured values, but the parametric values apply per sample. If a mean lies above it, at least one individual sample was above it — the mean does not say how many, or by how much. That is why this is not reported here as an exceedance of the parametric value. What counts remains the water supplier's publication, which each row links to.

Indicator parameters (8)

Indicator parameters – Hochdorf
Parameter Value Parametric value Share of the parametric value Reference
Chloride 17.7 mg/l Mean · Hochdorf
Conductivity (25 °C) 750 µS/cm Mean · Hochdorf
Oxidisability 1 mg KMnO4/l Mean · Hochdorf
pH 7.17 Mean · Hochdorf
Sodium 10 mg/l 200 mg/l
5 %
Mean · Hochdorf
Sulphate 15.2 mg/l Mean · Hochdorf
Temperature 12.5 °C Mean · Hochdorf
Turbidity 0.22 TE/F Mean · Hochdorf

Further parameters (5)

Further parameters – Hochdorf
Parameter Value Parametric value Share of the parametric value Reference
Calcium 134.5 mg/l Mean · Hochdorf
Hydrogen carbonate 428 mg/l Mean · Hochdorf
Magnesium 13.1 mg/l Mean · Hochdorf
Potassium 1.8 mg/l Mean · Hochdorf
Total hardness 38.9 °fH Mean · Hochdorf

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.

Source: https://trinkwasser.ch/de/versorger/635/wwz-ag/3228/hochdorf · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 6340

Römerswil

WWZ AG

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

Water hardness
22.5 °dH
Hardness range hard
Key values Römerswil
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 32.5 mg/l 40 mg/l
81 %
Mean · Römerswil
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Römerswil
Sulphate 18.75 mg/l Mean · Römerswil
Show all recorded parameters (12 — most recent value per parameter)

Microbiology (3)

Microbiology – Römerswil
Parameter Value Parametric value Share of the parametric value Reference
Aerobic mesophilic bacteria 1.25 KBE/ml 300 1/ml Mean · Römerswil
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Römerswil
Intestinal enterococci nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Römerswil

Chemical parameters (1)

Chemical parameters – Römerswil
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 32.5 mg/l 40 mg/l
81 %
Mean · Römerswil

Indicator parameters (4)

Indicator parameters – Römerswil
Parameter Value Parametric value Share of the parametric value Reference
Chloride 19.75 mg/l Mean · Römerswil
Sulphate 18.75 mg/l Mean · Römerswil
Temperature 11.8 °C Mean · Römerswil
Turbidity 0.12 TE/F Mean · Römerswil

Further parameters (4)

Further parameters – Römerswil
Parameter Value Parametric value Share of the parametric value Reference
Calcium 135.5 mg/l Mean · Römerswil
Hydrogen carbonate 433 mg/l Mean · Römerswil
Magnesium 15.5 mg/l Mean · Römerswil
Total hardness 40.15 °fH Mean · Römerswil

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.

Source: https://trinkwasser.ch/de/versorger/635/wwz-ag/3260/romerswil · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 6340

Walterswil Sihlbrugg

WWZ AG

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

Water hardness
16.2 °dH
Hardness range hard
Key values Walterswil Sihlbrugg
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 13.37 mg/l 40 mg/l
33 %
Mean · Walterswil Sihlbrugg
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Walterswil Sihlbrugg
Sulphate 7.3 mg/l Mean · Walterswil Sihlbrugg
Show all recorded parameters (14 — most recent value per parameter)

Microbiology (3)

Microbiology – Walterswil Sihlbrugg
Parameter Value Parametric value Share of the parametric value Reference
Aerobic mesophilic bacteria 7.6 KBE/ml 300 1/ml Mean · Walterswil Sihlbrugg
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Walterswil Sihlbrugg
Intestinal enterococci nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Walterswil Sihlbrugg

Chemical parameters (2)

Chemical parameters – Walterswil Sihlbrugg
Parameter Value Parametric value Share of the parametric value Reference
Fluoride 0.06 mg/l 1.5 mg/l
4 %
Mean · Walterswil Sihlbrugg
Nitrate 13.37 mg/l 40 mg/l
33 %
Mean · Walterswil Sihlbrugg

Indicator parameters (5)

Indicator parameters – Walterswil Sihlbrugg
Parameter Value Parametric value Share of the parametric value Reference
Chloride 4.06 mg/l Mean · Walterswil Sihlbrugg
Conductivity (25 °C) 501 µS/cm Mean · Walterswil Sihlbrugg
pH 7.57 Mean · Walterswil Sihlbrugg
Sulphate 7.3 mg/l Mean · Walterswil Sihlbrugg
Temperature 11.3 °C Mean · Walterswil Sihlbrugg

Further parameters (4)

Further parameters – Walterswil Sihlbrugg
Parameter Value Parametric value Share of the parametric value Reference
Calcium 86.8 mg/l Mean · Walterswil Sihlbrugg
Dissolved organic carbon (DOC) 0.26 mg/l Mean · Walterswil Sihlbrugg
Magnesium 17.78 mg/l Mean · Walterswil Sihlbrugg
Total hardness 29 °fH Mean · Walterswil Sihlbrugg

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.

Source: https://trinkwasser.ch/de/versorger/635/wwz-ag/3229/walterswil-sihlbrugg · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 6340

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

Water hardness
13.9 °dH
Hardness range medium
Key values Zug
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 8.3 mg/l 40 mg/l
21 %
Mean · Zug
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Zug
Sulphate 8.5 mg/l Mean · Zug
Sodium 10.1 mg/l 200 mg/l
5 %
Mean · Zug
Show all recorded parameters (18 — most recent value per parameter)

Microbiology (3)

Microbiology – Zug
Parameter Value Parametric value Share of the parametric value Reference
Aerobic mesophilic bacteria 11.6 KBE/ml 300 1/ml Mean · Zug
Escherichia coli (E. coli) nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Zug
Intestinal enterococci nn
not detectable
Unit not stated in the document
0/100 ml Maximum · Median nn · Zug

Chemical parameters (1)

Chemical parameters – Zug
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 8.3 mg/l 40 mg/l
21 %
Mean · Zug

PFAS (3)

PFAS – Zug
Parameter Value Parametric value Share of the parametric value Reference
Perfluorohexane sulfonic acid (PFHxS) < 0.001 µg/l
below limit of quantification
0.3 µg/l
< 0.3 % *
Mean · Zug
Perfluorooctanesulfonic acid (PFOS) < 0.001 µg/l
below limit of quantification
0.3 µg/l
< 0.3 % *
Mean · Zug
Perfluorooctanoic acid (PFOA) < 0.001 µg/l
below limit of quantification
0.5 µg/l
< 0.2 % *
Mean · Zug

* 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 (7)

Indicator parameters – Zug
Parameter Value Parametric value Share of the parametric value Reference
Chloride 12.13 mg/l Mean · Zug
Conductivity (25 °C) 439.57 µS/cm Mean · Zug
Iron 0.02 mg/l 0.2 mg/l
10 %
Mean · Zug
pH 7.48 Mean · Zug
Sodium 10.1 mg/l 200 mg/l
5 %
Mean · Zug
Sulphate 8.5 mg/l Mean · Zug
Turbidity 0.15 TE/F Mean · Zug

Further parameters (4)

Further parameters – Zug
Parameter Value Parametric value Share of the parametric value Reference
Calcium 76.5 mg/l Mean · Zug
Magnesium 14.1 mg/l Mean · Zug
Potassium 1.7 mg/l Mean · Zug
Total hardness 24.8 °fH Mean · Zug

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.

Source: https://trinkwasser.ch/de/versorger/635/wwz-ag/3227/zug · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 6340

Frequently asked questions about drinking water in Baar, Sihlbrugg

How hard is the water in Baar, Sihlbrugg?
Wasserversorgung Arbach AG publishes a total hardness of 24 °fH for the supply zone Arbach — that corresponds to 13.4 °dH. The hardness range is a classification under the German Detergents and Cleaning Products Act (soft below 8,4 °dH, medium 8,4 to 14 °dH, hard above that) and not a quality verdict — it indicates how much calcium and magnesium is dissolved in the water. Basis: 2024, retrieved on 07/08/2026.
How much nitrate is in the drinking water in Baar, Sihlbrugg?
Wasserversorgung Arbach AG publishes a nitrate value of 6.3 mg/l for the supply zone Arbach. The statutory parametric value is 40 mg/l; the measured value represents 16 % of the parametric value. Basis: 2024, retrieved on 07/08/2026.
Who supplies the drinking water in Baar, Sihlbrugg?
Wasserversorgung Arbach AG. The values shown here come from the supply zone Arbach 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.