Water hardness and tap water in Königsbrunn
Landkreis Augsburg, Bayern · Postcode 86343
This page is a translation of the German version; the German page is authoritative. German version · Report a translation error
- Limits of the Drinking Water OrdinancemetAll tested parameters (11), at the waterworks
- Water hardness13.9 °dH, mediumNo legal limit, only a range
- Data coverageCore parameters: 3 of 7Score provisional
Verified drinking-water values
Note from the test report (in the German original): Prüfbericht zur Probe vom 01.04.2026 im Wasserhaus nach der UV-Anlage, also ab Werk. Blei, Kupfer, Arsen und Uran nennt dieser Bericht nicht; die letzte umfassende Untersuchung auf der Seite stammt vom 04.04.2024 und ist hier nicht übernommen. PFAS steht in einem eigenen Bericht vom 07.10.2026. PFAS-Bericht zur Probe vom 07.10.2026 am Wasserwerk nach der UV-Anlage, also ab Werk. Das Labor nennt eine „Summe PFAS“ aus 13 Stoffen, nicht die vollen 20 der Verordnung. Gefunden wurden PFHxS 0,0036, PFOS 0,0034 und PFNA 0,0012 µg/l, zusammen 0,0082 µg/l. Da das drei der vier Stoffe von PFAS-4 sind und PFOA unter 0,001 µg/l lag, entspricht das auch der Summe PFAS-4 (Grenzwert ab 12.01.2028: 0,02 µg/l).
Background on household plumbing, not a measurement: in Königsbrunn, 25 % of buildings with living space were built before 1970, and a further 17 % between 1970 and 1979 (Zensus 2022, Statistisches Bundesamt, dl-de/by-2-0). (Zensus 2022) According to the German Environment Agency (Umweltbundesamt), lead pipes exist at most in houses built before 1973 – and by no means in all of them. Whether there are any in your house is known to the owner or a plumber. (UBA)
What the values mean for Königsbrunn
- Nitrate 6.75 mg/L – about 14 % of the limit of 50 mg/L and in the unremarkable range. Boiling does not reduce nitrate.
- PFAS (sum of PFAS-20) 8.2 ng/L – about 8 % of the limit of 100 ng/L (since 12 January 2026).
- pH 7.57 – within the range of the Drinking Water Ordinance (6.5 to 9.5). The pH determines how corrosive the water is in household plumbing.
Water hardness in Königsbrunn in everyday life
At 13.9 °dH, Königsbrunn is in the hardness range “medium” (soft: below 8.4 °dH, medium: 8.4–14 °dH, hard: above 14 °dH).
- Dose detergent for the hardness range “medium”.
- As a rule of thumb, descale the kettle about every four to six weeks and the coffee machine as the manufacturer recommends.
- A limescale protection device is not a must at medium hardness; regular descaling is often enough.
Baby food and low sodium: tap water in Königsbrunn next to the bottled-water thresholds
Bottled water may only be labelled “suitable for preparing infant food” („geeignet für die Zubereitung von Säuglingsnahrung“) if it keeps to the maximum levels of the German Mineral and Table Water Ordinance (Mineral- und Tafelwasser-Verordnung, Annex 6). Here the published values for Königsbrunn are shown next to them, each substance on its own. This is a comparison with labelling thresholds for bottled water, not a statement on whether your tap water is suitable for baby food. (Min/TafelWV, Anlage 6)
For context: the German Environment Agency (Umweltbundesamt) considers preparing baby food with bottled water carrying this label necessary only in rare cases, for example when tap water is temporarily allowed to contain more than 50 mg/l nitrate. (UBA 2016, p. 59) Water from lead pipes in the house is always unsuitable for infants. (UBA 2020, p. 16) The values apply at the waterworks.
| Substance | Maximum level | Value in Königsbrunn |
|---|---|---|
| Sodium | 20 mg/l | 9.7 mg/l – not above |
| Nitrate | 10 mg/l | 6.75 mg/l – not above |
| Nitrite | 0.02 mg/l | 0.01 mg/l – not above |
| Sulphate | 240 mg/l | 19.6 mg/l – not above |
| Fluoride | 0.7 mg/l | 0.1 mg/l – not above |
| Manganese | 0.05 mg/l | 0.0042 mg/l – not above |
| Arsenic | 0.005 mg/l | not in the report |
| Uranium | 0.002 mg/l | not in the report |
Against the other thresholds of Annex 6, the water would qualify as: low in sodium (“suitable for a low-sodium diet”) (Sodium 9.7 mg/l, threshold below 20 mg/l).
Questions about baby food are answered by your midwife, your paediatrician and the health office (Gesundheitsamt).
Frequently asked questions about tap water in Königsbrunn
Can you drink the tap water in Königsbrunn?
According to the verified values, yes: All tested parameters with a legal limit (11) meet the limits set by the German Drinking Water Ordinance (TrinkwV). WaterScore (provisional): 100 out of 100 – the test report contains only 3 of 7 core parameters. This applies to the water from the waterworks – restrictions can only arise from old household plumbing.
How hard is the water in Königsbrunn?
The total hardness is 13.9 °dH – hardness range “medium”. Dose detergent for the hardness range “medium”.
Is there PFAS in the tap water in Königsbrunn?
Yes, in measurable amounts: according to the published analysis by Stadtwerke Königsbrunn (as of 7 October 2026), the sum of PFAS-20 is 0.0082 µg/l – that is 8 % of the limit of 0.1 µg/l, which has applied since 12 January 2026. Even this sum of all 20 substances is below the limit of 0.02 µg/l that applies from 12 January 2028 to the sum of four of them (PFAS-4).
Do I need to filter my tap water in Königsbrunn?
Based on the verified supplier values, a filter is not necessary. It can make sense if you do not like the taste. If you suspect lead pipes in an old building, a filter does not help; a laboratory analysis at the tap does – that is a question of the household plumbing, not of the water leaving the works.
WaterScore
- Total (provisional)100 / 100
- Chemical safety100 / 100
- PFAS100 / 100
- Nutrients100 / 100
- General parameters100 / 100
- Data timeliness100 / 100
- Data quality100 / 100
Data coverage: 3 of 7 core parameters. Not in the test report: Lead, Copper, Arsenic and Uranium. Missing parameters are neither estimated nor counted as harmless: the score is based only on the values available and is therefore provisional. It is not a health assessment and says nothing about the water beyond the service connection. Methodology v4: how we calculate the WaterScore.
Evidence: cite and check
- Prüfbericht PB26-4997, Große chemische Trinkwasseruntersuchung, Wasserhaus nach UV-Anlage, Probenahme 01.04.2026 (Stadtwerke Königsbrunn (Analyse: Labor Dr. Scheller GmbH)) · SHA-256 of the evaluated file: dc81f840068994f2…, checked on 1 November 2026
- Prüfbericht AB2615855-2, Mischwasser auf PFAS, Wasserwerk nach UV-Anlage, Probenahme 07.10.2026 (Stadtwerke Königsbrunn (Analyse: Analytik Institut Rietzler GmbH)) · SHA-256 of the evaluated file: e6fb8de61225990e…, checked on 1 November 2026
Suggested citation: Trinkwassermonitor (2026): Tap water in Königsbrunn. Values according to the water supplier’s test report, sampling date 7 October 2026; at the waterworks, not household plumbing. https://trinkwassermonitor.ink/en/tap-water/koenigsbrunn/
JSON: /api/v1/evidence?city=koenigsbrunn
Data as of: 7 October 2026 · verified: 15 of 15 evaluated parameters.
This page shows only verified test data with sources, or states explicitly where data is missing (no estimated values). Cite as: “Trinkwassermonitor (2026). Tap water in Königsbrunn. Retrieved from https://trinkwassermonitor.ink/en/tap-water/koenigsbrunn/.”