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Drinking water in Landshut, Altdorf

3 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.

Brunnen Siebensee, Schloßberg sowie Versorgungsnetz

Stadtwerke Landshut

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

Key values Brunnen Siebensee, Schloßberg sowie Versorgungsnetz
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS n. n. mg/l
not detectable
0.1 µg/l Single value
Nitrate 9,7 mg/l 50 mg/l
19 %
Single value
Lead < 0,001 mg/l
below limit of quantification
10 µg/l
< 10 % *
Single value
Sulphate 39 mg/l 250 mg/l
16 %
Single value
Sodium 13,7 mg/l 200 mg/l
7 %
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 (30 — most recent value per parameter)

Chemical parameters (14)

Chemical parameters – Brunnen Siebensee, Schloßberg sowie Versorgungsnetz
Parameter Value Parametric value Share of the parametric value Reference
Arsenic < 0,001 mg/l
below limit of quantification
10 µg/l
< 10 % *
Single value
Bisphenol A < 0,00005 mg/l
below limit of quantification
2.5 µg/l
< 2 % *
Single value
Cadmium < 0,0003 mg/l
below limit of quantification
3 µg/l
< 10 % *
Single value
Chromium < 0,0005 mg/l
below limit of quantification
25 µg/l
< 2 % *
Single value
Copper 0,011 mg/l 2 mg/l
0.5 %
Single value
Cyanide < 0,005 mg/l
below limit of quantification
50 µg/l
< 10 % *
Single value
Fluoride 0,16 mg/l 1.5 mg/l
11 %
Single value
Lead < 0,001 mg/l
below limit of quantification
10 µg/l
< 10 % *
Single value
Nickel < 0,002 mg/l
below limit of quantification
20 µg/l
< 10 % *
Single value
Nitrate 9,7 mg/l 50 mg/l
19 %
Single value
Nitrite < 0,02 mg/l
below limit of quantification
0.5 mg/l
< 4 % *
Single value
Tetrachloroethene and Trichloroethene (sum) n. n. mg/l
not detectable
10 µg/l Single value
Trihalomethanes — Total n. n. mg/l
not detectable
50 µg/l Single value
Uranium 0,0040 mg/l 10 µg/l
40 %
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)

PFAS – Brunnen Siebensee, Schloßberg sowie Versorgungsnetz
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS n. n. mg/l
not detectable
0.1 µg/l Single value

Indicator parameters (8)

Indicator parameters – Brunnen Siebensee, Schloßberg sowie Versorgungsnetz
Parameter Value Parametric value Share of the parametric value Reference
Chloride 22,9 mg/l 250 mg/l
9 %
Single value
Colour farblos
Unit not stated in the document
0.5 m⁻¹ Single value
Odour ohne für den Verbraucher annehmbar Single value
pH 7,4 6,5–9,5 Maximum
Sodium 13,7 mg/l 200 mg/l
7 %
Single value
Sulphate 39 mg/l 250 mg/l
16 %
Single value
Temperature 14,7 °C Maximum
Turbidity klar
Unit not stated in the document
1 NTU Single value

Further parameters (7)

Further parameters – Brunnen Siebensee, Schloßberg sowie Versorgungsnetz
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 6,37 mmol/l Single value
Base capacity to pH 8.2 0,61 mmol/l Single value
Calcium 99,8 mg/l Single value
Carbonate hardness 17,7 °dH Single value
Magnesium 27,1 mg/l Single value
Potassium 2,8 mg/l Single value
Sum of alkaline earth metals 3,60 mmol/l 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.

Source: https://www.stadtwerke-landshut.de/wp-content/uploads/Trinkwasser-Pruefbericht-Landshut.pdf · Februar 2026 · Februar 2026 · retrieved on 11/07/2026

Postcodes in this zone: 84032

Show 2 more supply zones

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

Water hardness
17.2 °dH
Hardness range 3 / hart
Key values Klosterholz
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 9,30 mg/l 50 mg/l
19 %
Single value · Klosterholz
Lead < 0,002 mg/l
below limit of quantification
10 µg/l
< 20 % *
Single value · Klosterholz
Sulphate 25,30 mg/l 250 mg/l
10 %
Single value · Klosterholz
Sodium 3,90 mg/l 200 mg/l
2 %
Single value · Klosterholz

* 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 (18 — most recent value per parameter)

Chemical parameters (9)

Chemical parameters – Klosterholz
Parameter Value Parametric value Share of the parametric value Reference
Arsenic 0,0011 mg/l 10 µg/l
11 %
Single value · Klosterholz
Cadmium < 0,0005 mg/l
below limit of quantification
3 µg/l
< 17 % *
Single value · Klosterholz
Chromium < 0,0005 mg/l
below limit of quantification
25 µg/l
< 2 % *
Single value · Klosterholz
Cyanide < 0,005 mg/l
below limit of quantification
50 µg/l
< 10 % *
Single value · Klosterholz
Fluoride <0,25 mg/l
below limit of quantification
1.5 mg/l
< 17 % *
Single value · Klosterholz
Lead < 0,002 mg/l
below limit of quantification
10 µg/l
< 20 % *
Single value · Klosterholz
Mercury < 0,0002 mg/l
below limit of quantification
1 µg/l
< 20 % *
Single value · Klosterholz
Nickel < 0,005 mg/l
below limit of quantification
20 µg/l
< 25 % *
Single value · Klosterholz
Nitrate 9,30 mg/l 50 mg/l
19 %
Single value · Klosterholz

* 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 (4)

Indicator parameters – Klosterholz
Parameter Value Parametric value Share of the parametric value Reference
Chloride 8,50 mg/l 250 mg/l
3 %
Single value · Klosterholz
pH 7,40 16,6 °C - 6,5–9,5 Single value · Klosterholz
Sodium 3,90 mg/l 200 mg/l
2 %
Single value · Klosterholz
Sulphate 25,30 mg/l 250 mg/l
10 %
Single value · Klosterholz

Further parameters (5)

Further parameters – Klosterholz
Parameter Value Parametric value Share of the parametric value Reference
Calcium 74,20 mg/l Single value · Klosterholz
Hardness range (WRMG) 3 / hart Single value · Klosterholz
Magnesium 30,30 mg/l Single value · Klosterholz
Potassium 0,80 mg/l Single value · Klosterholz
Total hardness 17,20 °dH Single value · Klosterholz

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://www.wv-isar-gruppe1.de/index.php?id=37 · Gutachten vom 03.05.2026 des Chemischen und Bakteriologischen Labors Dr. Feierabend, Überlingen - gem. Trinkwasserverordnung 2023 vom 20.6.2023 (BGBl. I, S 959) · Probenahmezeitpunkt: 05./06.03.2026 · retrieved on 11/07/2026

Postcodes in this zone: 84032

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

Water hardness
21.9 °dH
Hardness range 3 / hart
Key values Ohu
Parameter Value Parametric value Share of the parametric value Reference
Nitrate 10,60 mg/l 50 mg/l
21 %
Single value · Ohu
Lead < 0,002 mg/l
below limit of quantification
10 µg/l
< 20 % *
Single value · Ohu
Sulphate 38,80 mg/l 250 mg/l
16 %
Single value · Ohu
Sodium 10,60 mg/l 200 mg/l
5 %
Single value · Ohu

* 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 (18 — most recent value per parameter)

Chemical parameters (9)

Chemical parameters – Ohu
Parameter Value Parametric value Share of the parametric value Reference
Arsenic < 0,001 mg/l
below limit of quantification
10 µg/l
< 10 % *
Single value · Ohu
Cadmium < 0,0005 mg/l
below limit of quantification
3 µg/l
< 17 % *
Single value · Ohu
Chromium < 0,0005 mg/l
below limit of quantification
25 µg/l
< 2 % *
Single value · Ohu
Cyanide < 0,005 mg/l
below limit of quantification
50 µg/l
< 10 % *
Single value · Ohu
Fluoride <0,25 mg/l
below limit of quantification
1.5 mg/l
< 17 % *
Single value · Ohu
Lead < 0,002 mg/l
below limit of quantification
10 µg/l
< 20 % *
Single value · Ohu
Mercury < 0,0002 mg/l
below limit of quantification
1 µg/l
< 20 % *
Single value · Ohu
Nickel < 0,005 mg/l
below limit of quantification
20 µg/l
< 25 % *
Single value · Ohu
Nitrate 10,60 mg/l 50 mg/l
21 %
Single value · Ohu

* 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 (4)

Indicator parameters – Ohu
Parameter Value Parametric value Share of the parametric value Reference
Chloride 25,50 mg/l 250 mg/l
10 %
Single value · Ohu
pH 7,22 8,7 °C - 6,5–9,5 Single value · Ohu
Sodium 10,60 mg/l 200 mg/l
5 %
Single value · Ohu
Sulphate 38,80 mg/l 250 mg/l
16 %
Single value · Ohu

Further parameters (5)

Further parameters – Ohu
Parameter Value Parametric value Share of the parametric value Reference
Calcium 102,00 mg/l Single value · Ohu
Hardness range (WRMG) 3 / hart Single value · Ohu
Magnesium 34,00 mg/l Single value · Ohu
Potassium 2,70 mg/l Single value · Ohu
Total hardness 21,90 °dH Single value · Ohu

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://www.wv-isar-gruppe1.de/index.php?id=37 · Gutachten vom 03.05.2026 des Chemischen und Bakteriologischen Labors Dr. Feierabend, Überlingen - gem. Trinkwasserverordnung 2023 vom 20.6.2023 (BGBl. I, S 959) · Probenahmezeitpunkt: 05./06.03.2026 · retrieved on 11/07/2026

Postcodes in this zone: 84032

Frequently asked questions about drinking water in Landshut, Altdorf

How much nitrate is in the drinking water in Landshut, Altdorf?
Stadtwerke Landshut publishes a nitrate value of 9,7 mg/l for the supply zone Brunnen Siebensee, Schloßberg sowie Versorgungsnetz. The statutory parametric value is 50 mg/l; the measured value represents 19 % of the parametric value. Basis: Februar 2026, retrieved on 11/07/2026.
Are PFAS detectable in the drinking water in Landshut, Altdorf?
Stadtwerke Landshut states for the supply zone Brunnen Siebensee, Schloßberg sowie Versorgungsnetz that the sum PFAS-20 was not detectable (entry in the report: "n. n."). This is not to be read as "PFAS-free": below the limit of quantification, the measurement cannot make any statement. The statutory parametric value is 0.1 µg/l; the measured value lies below it and cannot be specified more precisely below the limit of quantification. For the sum of the 20 individual substances, this parametric value has applied since 12/01/2026. Basis: Februar 2026, retrieved on 11/07/2026.
Who supplies the drinking water in Landshut, Altdorf?
Stadtwerke Landshut. The values shown here come from the supply zone Brunnen Siebensee, Schloßberg sowie Versorgungsnetz 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.