Drinking water in Altdorf bei Nürnberg
One supply zone, water supplier: Stadtwerke Altdorf GmbH.
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.
Wasserwerk Abgabe in das Versorgungsnetz Altdorf
Stadtwerke Altdorf GmbHAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
Water hardness
7.7 °dH
Hardness range soft
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of PFAS | < n.n. µg/l not detectable | 0.1 µg/l | — | Single value |
| Nitrate | 1,0 mg/l NO3 | 50 mg/l | — | Single value |
| Lead | < 0,0020 mg/l Pb below limit of quantification | 10 µg/l | — | Single value |
| Escherichia coli (E. coli) | 0 KBE/10 | 0/100 ml | — | Single value |
| Sulphate | 21,3 mg/l SO4 | 250 mg/l | — | Single value |
| Sodium | 20,3 mg/l Na | 200 mg/l | — | Single value |
Show all recorded parameters (56 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 KBE/10 | 0/100 ml | — | Single value |
| Intestinal enterococci | 0 KBE/10 | 0/100 ml | — | Single value |
Chemical parameters (30)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | < 0,50 µg/l below limit of quantification | 3 µg/l | < 17 % * | Single value |
| Acrylamide | < 0,025 µg/l below limit of quantification | 0.1 µg/l | < 25 % * | Single value |
| Antimony | < 0,0010 mg/l Sb below limit of quantification | 5 µg/l | — | Single value |
| Arsenic | 0,0073 mg/l As | 10 µg/l | — | Single value |
| Benzene | < 0,25 µg/l below limit of quantification | 1 µg/l | < 25 % * | Single value |
| Benzo(a)pyrene | < 0,0025 µg/l below limit of quantification | 10 ng/l | < 25 % * | Single value |
| Bisphenol A | < 0,01 µg/l below limit of quantification | 2.5 µg/l | < 0.4 % * | Single value |
| Boron | < 0,027 mg/l B below limit of quantification | 1 mg/l | — | Single value |
| Bromate | < 0,0025 mg/l below limit of quantification | 10 µg/l | < 25 % * | Single value |
| Cadmium | < 0,0005 mg/l Cd below limit of quantification | 3 µg/l | — | Single value |
| Chlorate | n.B. mg/l not determined | 70 µg/l | — | Single value |
| Chlorite | n.B. mg/l not determined | 0.2 mg/l | — | Single value |
| Chromium | < 0,0005 mg/l Cr below limit of quantification | 25 µg/l | — | Single value |
| Copper | < 0,0050 mg/l Cu below limit of quantification | 2 mg/l | — | Single value |
| Cyanide | < 0,005 mg/l CN below limit of quantification | 50 µg/l | — | Single value |
| Epichlorohydrin | 0,03 µg/l | 0.1 µg/l | 30 % | Single value |
| Fluoride | 0,36 mg/l F | 1.5 mg/l | — | Single value |
| Lead | < 0,0020 mg/l Pb below limit of quantification | 10 µg/l | — | Single value |
| Mercury | < 0,0002 mg/l Hg below limit of quantification | 1 µg/l | — | Single value |
| Microcystin-LR | n.B. mg/l not determined | 1 µg/l | — | Single value |
| Nickel | < 0,0050 mg/l Ni below limit of quantification | 20 µg/l | — | Single value |
| Nitrate | 1,0 mg/l NO3 | 50 mg/l | — | Single value |
| Nitrite | < 0,05 mg/l NO2 below limit of quantification | 0.5 mg/l | — | Single value |
| Pesticides — Total | n.n. µg/l not detectable | 0.5 µg/l | — | Single value |
| Selenium | < 0,0010 mg/l Se below limit of quantification | 10 µg/l | — | Single value |
| Tetrachloroethene | < 0,5 µg/l below limit of quantification | — | — | Single value |
| Trichloroethene | < 0,5 µg/l below limit of quantification | — | — | Single value |
| Trihalomethanes — Total | n.n. mg/l not detectable | 50 µg/l | — | Single value |
| Uranium | < 0,0010 mg/l U below limit of quantification | 10 µg/l | — | Single value |
| Vinyl chloride | < 0,25 µg/l below limit of quantification | 0.5 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.
PFAS (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of PFAS | < n.n. µg/l not detectable | 0.1 µg/l | — | Single value |
Indicator parameters (18)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | < 0,005 mg/l Al below limit of quantification | 0.2 mg/l | — | Single value |
| Ammonium | < 0,05 mg/l NH4 below limit of quantification | 0.5 mg/l | — | Single value |
| Calcite dissolution capacity | 0 mg/l | 5 mg/l CaCO3 | — | Single value |
| Chloride | 15,3 mg/l Cl | 250 mg/l | — | Single value |
| Coliform bacteria | 0 KBE/10 | 0/100 ml | — | Single value |
| Colony count 22 °C | 0 KBE/ml | ohne anormale Veränderung | — | Single value |
| Colony count 36 °C | 0 KBE/ml | ohne anormale Veränderung | — | Single value |
| Colour | 0,05 m-1 | 0.5 m⁻¹ | — | Single value |
| Iron | < 0,010 mg/l Fe below limit of quantification | 0.2 mg/l | — | Single value |
| Manganese | < 0,005 mg/l Mn below limit of quantification | 50 µg/l | — | Single value |
| Odour | o.B. TON | für den Verbraucher annehmbar | — | Single value |
| pH | 7,75 - | 6,5–9,5 | — | Single value |
| Sodium | 20,3 mg/l Na | 200 mg/l | — | Single value |
| Sulphate | 21,3 mg/l SO4 | 250 mg/l | — | Single value |
| Taste | o.B. - | für den Verbraucher annehmbar | — | Single value |
| Temperature | 15,6 °C | — | — | Single value |
| Total organic carbon (TOC) | < 0,25 mg/l below limit of quantification | ohne anormale Veränderung | — | Single value |
| Turbidity | 0,07 NTU | 1 NTU | — | Single value |
Further parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 38,7 mg/l Ca | — | — | Single value |
| Magnesium | 10,2 mg/l Mg | — | — | Single value |
| Oxygen | 9,9 mg/l O2 | — | — | Single value |
| Potassium | 8,4 mg/l K | — | — | Single value |
| Total hardness | 7,7 °dH | — | — | 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-altdorf.de/fileadmin/user_upload/2026_Maerz_Trinkwasseranalyse.pdf · 23.03.2026 · retrieved on 11/07/2026
Postcodes in this zone: 90518
Frequently asked questions about drinking water in Altdorf bei Nürnberg
- How hard is the water in Altdorf bei Nürnberg?
- Stadtwerke Altdorf GmbH publishes a total hardness of 7.7 °dH for the supply zone Wasserwerk Abgabe in das Versorgungsnetz Altdorf (hardness range soft). 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: Publication by the water supplier, retrieved on 11/07/2026.
- Are PFAS detectable in the drinking water in Altdorf bei Nürnberg?
- Stadtwerke Altdorf GmbH states for the supply zone Wasserwerk Abgabe in das Versorgungsnetz Altdorf 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: Publication by the water supplier, retrieved on 11/07/2026.
- Who supplies the drinking water in Altdorf bei Nürnberg?
- Stadtwerke Altdorf GmbH. The values shown here come from the supply zone Wasserwerk Abgabe in das Versorgungsnetz Altdorf 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.