Drinking water in Graz, Hitzendorf, Seiersberg-Pirka u.a.
2 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.
RN1 - Forstinger, Wienerstr. 339
Holding Graz - Kommunale Dienstleistungen GmbH, WasserwirtschaftAssigned 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 24/06/2025. 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.
Water hardness
16.2 °dH
Hardness range hard
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 6,6 mg/l | 50 mg/l | 13 % | Single value |
| Lead | < 3 µg/l below limit of quantification | 10 µg/l | < 30 % * | Single value |
| Escherichia coli (E. coli) | 0 Anzahl/100ml | 0/100 ml | — | Single value |
| Sulphate | 66,9 mg/l | 250 mg/l | 27 % | Single value |
| Sodium | 5,7 mg/l | 200 mg/l | 3 % | 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 (84 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 Anzahl/100ml | 0/100 ml | — | Single value |
| Intestinal enterococci | 0 Anzahl/100ml | 0/100 ml | — | Single value |
| Pseudomonas aeruginosa | 0 Anzahl/100ml | 0/100 ml | — | Single value |
Chemical parameters (59)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | < 0,45 µg/l below limit of quantification | 3 µg/l | < 15 % * | Single value |
| 2,4-D | < 0,05 µg/l below limit of quantification | — | — | Single value |
| 2,6-Dichlorobenzamide (BAM) | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Aldrin | < 0,007 µg/l below limit of quantification | — | — | Single value |
| Antimony | < 0,5 µg/l below limit of quantification | 5 µg/l | < 10 % * | Single value |
| Arsenic | < 5 µg/l below limit of quantification | 10 µg/l | < 50 % * | Single value |
| Atrazine | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Azoxystrobin | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Bentazone | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Benzene | < 0,5 µg/l below limit of quantification | 1 µg/l | < 50 % * | Single value |
| Benzo(a)pyrene | < 0,005 µg/l below limit of quantification | 10 ng/l | < 50 % * | Single value |
| Benzo(b)fluoranthene | < 0,005 µg/l below limit of quantification | — | — | Single value |
| Benzo(ghi)perylene | < 0,005 µg/l below limit of quantification | — | — | Single value |
| Benzo(k)fluoranthene | < 0,005 µg/l below limit of quantification | — | — | Single value |
| Boron | < 0,02 mg/l below limit of quantification | 1 mg/l | < 2 % * | Single value |
| Bromacil | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Cadmium | < 1 µg/l below limit of quantification | 5 µg/l | < 20 % * | Single value |
| Chloridazon | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Chromium | < 2 µg/l below limit of quantification | 50 µg/l | < 4 % * | Single value |
| Clopyralid | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Copper | 0,010 mg/l | 2 mg/l | 0.5 % | Single value |
| Cyanide | < 10 µg/l below limit of quantification | 50 µg/l | < 20 % * | Single value |
| Dicamba | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Dichlorprop | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Dieldrin | < 0,007 µg/l below limit of quantification | — | — | Single value |
| Dimethachlor | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Dimethenamid | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Diuron | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Ethofumesate | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Flufenacet | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Fluoride | 0,060 mg/l | 1.5 mg/l | 4 % | Single value |
| Glyphosate | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Heptachlor | < 0,007 µg/l below limit of quantification | — | — | Single value |
| Heptachlor epoxide | < 0,02 µg/l below limit of quantification | — | — | Single value |
| Hexazinone | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Imidacloprid | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Indeno(1,2,3-cd)pyrene | < 0,005 µg/l below limit of quantification | — | — | Single value |
| Isoproturon | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Lead | < 3 µg/l below limit of quantification | 10 µg/l | < 30 % * | Single value |
| MCPA | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Mecoprop | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Mercury | < 0,1 µg/l below limit of quantification | 1 µg/l | < 10 % * | Single value |
| Metalaxyl | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Metamitron | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Metazachlor | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Metolachlor | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Metribuzin | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Nickel | < 5 µg/l below limit of quantification | 20 µg/l | < 25 % * | Single value |
| Nicosulfuron | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Nitrate | 6,6 mg/l | 50 mg/l | 13 % | Single value |
| Nitrite | < 0,005 mg/l below limit of quantification | 0.1 mg/l | < 5 % * | Single value |
| Propazine | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Propiconazole | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Selenium | < 10 µg/l below limit of quantification | 20 µg/l | < 50 % * | Single value |
| Simazine | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Terbuthylazine | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Tetrachloroethene and Trichloroethene (sum) | < 0,1 µg/l below limit of quantification | 10 µg/l | < 1 % * | Single value |
| Thiacloprid | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Uranium | < 1 µg/l below limit of quantification | 15 µg/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.
Metabolites (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Desphenyl-chloridazon | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Dimethachlor sulfonic acid CGA 354742 | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Flufenacet sulfonic acid M2 | < 0,01 µg/l below limit of quantification | — | — | Single value |
Indicator parameters (12)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | < 0,01 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Single value |
| Ammonium | < 0,05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Single value |
| Chloride | 7,8 mg/l | 200 mg/l | 4 % | Single value |
| Clostridium perfringens (including spores) | 0 Anzahl/100ml | 0/100 ml | — | Single value |
| Coliform bacteria | 0 Anzahl/100ml | 0/100 ml | — | Single value |
| Iron | < 0,01 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Single value |
| Manganese | < 0,001 mg/l below limit of quantification | 50 µg/l | < 2 % * | Single value |
| pH | 7,6 - | 6,5–9,5 | — | Single value |
| Sodium | 5,7 mg/l | 200 mg/l | 3 % | Single value |
| Sulphate | 66,9 mg/l | 250 mg/l | 27 % | Single value |
| Temperature | 18,3 °C | — | — | Single value |
| Total organic carbon (TOC) | < 0,4 mg/l below limit of quantification | — | — | 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.
Further parameters (7)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 4,266 mmol/l | — | — | Single value |
| Calcium | 80,8 mg/l | 400 mg/l | 20 % | Single value |
| Magnesium | 21,1 mg/l | 150 mg/l | 14 % | Single value |
| Oxygen | 9,3 mg/l | — | — | Single value |
| Potassium | < 2 mg/l below limit of quantification | 50 mg/l | < 4 % * | Single value |
| Total hardness | 2,884 mmol/l | — | — | Single value |
| Zinc | 0,024 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.
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.holding-graz.at/wp-content/uploads/2026/01/Befund-Graz_2025.pdf · 24.06.2025 · Probenahme 04.06.2025; Prüfungszeitraum von 04.06.2025 bis 24.06.2025 · retrieved on 08/08/2026
Postcodes in this zone: 8054
Show 1 more supply zone
RN33 Übergabestation TLO
Holding Graz - Kommunale Dienstleistungen GmbH, WasserwirtschaftAssigned 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 28/02/2025. 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.
Water hardness
18.4 °dH
Hardness range hard
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 22,9 mg/l | 50 mg/l | 46 % | Single value |
| Lead | < 3 µg/l below limit of quantification | 10 µg/l | < 30 % * | Single value |
| Escherichia coli (E. coli) | 0 Anzahl/100ml | 0/100 ml | — | Single value |
| Sulphate | 45,7 mg/l | 250 mg/l | 18 % | Single value |
| Sodium | 23,4 mg/l | 200 mg/l | 12 % | 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 (84 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 Anzahl/100ml | 0/100 ml | — | Single value |
| Intestinal enterococci | 0 Anzahl/100ml | 0/100 ml | — | Single value |
| Pseudomonas aeruginosa | 0 Anzahl/100ml | 0/100 ml | — | Single value |
Chemical parameters (59)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | < 0,45 µg/l below limit of quantification | 3 µg/l | < 15 % * | Single value |
| 2,4-D | < 0,05 µg/l below limit of quantification | — | — | Single value |
| 2,6-Dichlorobenzamide (BAM) | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Aldrin | < 0,007 µg/l below limit of quantification | — | — | Single value |
| Antimony | < 0,5 µg/l below limit of quantification | 5 µg/l | < 10 % * | Single value |
| Arsenic | < 5 µg/l below limit of quantification | 10 µg/l | < 50 % * | Single value |
| Atrazine | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Azoxystrobin | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Bentazone | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Benzene | < 0,5 µg/l below limit of quantification | 1 µg/l | < 50 % * | Single value |
| Benzo(a)pyrene | < 0,005 µg/l below limit of quantification | 10 ng/l | < 50 % * | Single value |
| Benzo(b)fluoranthene | < 0,005 µg/l below limit of quantification | — | — | Single value |
| Benzo(ghi)perylene | < 0,005 µg/l below limit of quantification | — | — | Single value |
| Benzo(k)fluoranthene | < 0,005 µg/l below limit of quantification | — | — | Single value |
| Boron | 0,060 mg/l | 1 mg/l | 6 % | Single value |
| Bromacil | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Cadmium | < 1 µg/l below limit of quantification | 5 µg/l | < 20 % * | Single value |
| Chloridazon | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Chromium | < 2 µg/l below limit of quantification | 50 µg/l | < 4 % * | Single value |
| Clopyralid | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Copper | < 0,005 mg/l below limit of quantification | 2 mg/l | < 0.3 % * | Single value |
| Cyanide | < 10 µg/l below limit of quantification | 50 µg/l | < 20 % * | Single value |
| Dicamba | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Dichlorprop | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Dieldrin | < 0,007 µg/l below limit of quantification | — | — | Single value |
| Dimethachlor | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Dimethenamid | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Diuron | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Ethofumesate | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Flufenacet | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Fluoride | 0,060 mg/l | 1.5 mg/l | 4 % | Single value |
| Glyphosate | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Heptachlor | < 0,007 µg/l below limit of quantification | — | — | Single value |
| Heptachlor epoxide | < 0,02 µg/l below limit of quantification | — | — | Single value |
| Hexazinone | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Imidacloprid | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Indeno(1,2,3-cd)pyrene | < 0,005 µg/l below limit of quantification | — | — | Single value |
| Isoproturon | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Lead | < 3 µg/l below limit of quantification | 10 µg/l | < 30 % * | Single value |
| MCPA | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Mecoprop | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Mercury | < 0,1 µg/l below limit of quantification | 1 µg/l | < 10 % * | Single value |
| Metalaxyl | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Metamitron | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Metazachlor | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Metolachlor | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Metribuzin | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Nickel | < 5 µg/l below limit of quantification | 20 µg/l | < 25 % * | Single value |
| Nicosulfuron | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Nitrate | 22,9 mg/l | 50 mg/l | 46 % | Single value |
| Nitrite | < 0,005 mg/l below limit of quantification | 0.1 mg/l | < 5 % * | Single value |
| Propazine | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Propiconazole | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Selenium | < 10 µg/l below limit of quantification | 20 µg/l | < 50 % * | Single value |
| Simazine | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Terbuthylazine | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Tetrachloroethene and Trichloroethene (sum) | < 0,1 µg/l below limit of quantification | 10 µg/l | < 1 % * | Single value |
| Thiacloprid | < 0,03 µg/l below limit of quantification | — | — | Single value |
| Uranium | 1,3 µg/l | 15 µg/l | 9 % | 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.
Metabolites (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Desphenyl-chloridazon | < 0,05 µg/l below limit of quantification | — | — | Single value |
| Dimethachlor sulfonic acid CGA 354742 | < 0,025 µg/l below limit of quantification | — | — | Single value |
| Flufenacet sulfonic acid M2 | < 0,01 µg/l below limit of quantification | — | — | Single value |
Indicator parameters (12)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | < 0,01 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Single value |
| Ammonium | < 0,05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Single value |
| Chloride | 46,4 mg/l | 200 mg/l | 23 % | Single value |
| Clostridium perfringens (including spores) | 0 Anzahl/100ml | 0/100 ml | — | Single value |
| Coliform bacteria | 0 Anzahl/100ml | 0/100 ml | — | Single value |
| Iron | < 0,01 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Single value |
| Manganese | 0,011 mg/l | 50 µg/l | 22 % | Single value |
| pH | 7,3 _ | 6,5–9,5 | — | Single value |
| Sodium | 23,4 mg/l | 200 mg/l | 12 % | Single value |
| Sulphate | 45,7 mg/l | 250 mg/l | 18 % | Single value |
| Temperature | 11,8 °C | — | — | Single value |
| Total organic carbon (TOC) | < 0,4 mg/l below limit of quantification | — | — | 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.
Further parameters (7)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 5,159 mmol/l | — | — | Single value |
| Calcium | 98,6 mg/l | 400 mg/l | 25 % | Single value |
| Magnesium | 20,1 mg/l | 150 mg/l | 13 % | Single value |
| Oxygen | 7,8 mg/l | — | — | Single value |
| Potassium | 3,9 mg/l | 50 mg/l | 8 % | Single value |
| Total hardness | 3,287 mmol/l | — | — | Single value |
| Zinc | < 0,01 mg/l below limit of quantification | — | — | 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.holding-graz.at/wp-content/uploads/2025/03/Befund-Graz-Sued-2025.pdf · 28.02.2025 · Prüfungszeitraum: von 11.02.2025 bis 28.02.2025 · retrieved on 08/08/2026
Postcodes in this zone: 8054
Frequently asked questions about drinking water in Graz, Hitzendorf, Seiersberg-Pirka u.a.
- How hard is the water in Graz, Hitzendorf, Seiersberg-Pirka u.a.?
- Holding Graz - Kommunale Dienstleistungen GmbH, Wasserwirtschaft publishes a total hardness of 2,884 mmol/l for the supply zone RN1 - Forstinger, Wienerstr. 339 — that corresponds to 16.2 °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: 24.06.2025, retrieved on 08/08/2026.
- How much nitrate is in the drinking water in Graz, Hitzendorf, Seiersberg-Pirka u.a.?
- Holding Graz - Kommunale Dienstleistungen GmbH, Wasserwirtschaft publishes a nitrate value of 6,6 mg/l for the supply zone RN1 - Forstinger, Wienerstr. 339. The statutory parametric value is 50 mg/l; the measured value represents 13 % of the parametric value. Basis: 24.06.2025, retrieved on 08/08/2026.
- Who supplies the drinking water in Graz, Hitzendorf, Seiersberg-Pirka u.a.?
- Holding Graz - Kommunale Dienstleistungen GmbH, Wasserwirtschaft. The values shown here come from the supply zone RN1 - Forstinger, Wienerstr. 339 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.