Water hardness and tap water in Bad Kreuznach
Landkreis Bad Kreuznach, Rheinland-Pfalz · Postcode 55543, 55545, 55583
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 (36), at the waterworks
- Water hardness10.8 °dH, mediumNo legal limit, only a range
- Data coverageCore parameters: 6 of 7Score based on complete data
Verified drinking-water values: water “Wasserwerk Stromberger Straße”
Note from the test report (in the German original): Prüfbericht von chemlab für die Stadtwerke, Probe vom 11.02.2026 am Wasserwerk Stromberger Straße. Laut Stadtwerken beliefert es Bad Kreuznach, Bad Münster am Stein, Bosenheim und weitere Orte; Ebernburg hat ein eigenes Werk. Der Bericht enthält weder PFAS noch mikrobiologische Werte. Die veröffentlichte Datei zeigt die Seiten 2 und 3 von 3. Die Werte gelten ab Wasserwerk; welches Wasser an einer Adresse ankommt, sagt verbindlich der Versorger.
Background on household plumbing, not a measurement: in Bad Kreuznach, 54 % of buildings with living space were built before 1970, and a further 12 % 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 Bad Kreuznach
- Nitrate 19 mg/L – about 38 % of the limit of 50 mg/L and in the medium range – such values occur in catchments shaped by agriculture. Boiling does not reduce nitrate.
- Lead – not detectable at the waterworks. Lead gets into the water almost only through old lead pipes in household plumbing, not via the supplier.
- Uranium 3.2 µg/L – within the checked range against a limit of 10 µg/L. In some regions uranium occurs naturally from the rock (geogenic).
- pH 7.87 – 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 Bad Kreuznach in everyday life
At 10.8 °dH, Bad Kreuznach 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 Bad Kreuznach 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 Bad Kreuznach 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 Bad Kreuznach |
|---|---|---|
| Sodium | 20 mg/l | 25.3 mg/l – above the bottled-water threshold |
| Nitrate | 10 mg/l | 19 mg/l – above the bottled-water threshold |
| Nitrite | 0.02 mg/l | 0.005 mg/l – not above |
| Sulphate | 240 mg/l | 29 mg/l – not above |
| Fluoride | 0.7 mg/l | below the detection limit (0.05 mg/l) – not above |
| Manganese | 0.05 mg/l | below the detection limit (0.01 mg/l) – not above |
| Arsenic | 0.005 mg/l | 0.001 mg/l – not above |
| Uranium | 0.002 mg/l | 0.0032 mg/l – above the bottled-water threshold |
Questions about baby food are answered by your midwife, your paediatrician and the health office (Gesundheitsamt).
Frequently asked questions about tap water in Bad Kreuznach
Can you drink the tap water in Bad Kreuznach?
According to the verified values, yes: All tested parameters with a legal limit (36) meet the limits set by the German Drinking Water Ordinance (TrinkwV). WaterScore: 100 out of 100 (data coverage: 6 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 Bad Kreuznach?
It depends on the address: Wasserwerk Stromberger Straße 10.8 °dH and Wasserwerk Ebernburg 10 °dH – both in the hardness range “medium”. Dose detergent for the hardness range “medium”.
Is there PFAS in the tap water in Bad Kreuznach?
The published analysis by Stadtwerke Bad Kreuznach that we evaluated gives no PFAS value. This does not mean there is no PFAS in the water; there is simply no figure for it. Since 12 January 2026, a limit of 0.1 µg/l has applied to the sum of PFAS-20. The supplier can tell you whether PFAS was measured and with what result. For the other waters, the analyses give no PFAS value.
Do I need to filter my tap water in Bad Kreuznach?
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
- Total100 / 100
- Chemical safety100 / 100
- Heavy metals100 / 100
- Nutrients100 / 100
- General parameters100 / 100
- Data timeliness100 / 100
- Data quality100 / 100
Data coverage: 6 of 7 core parameters. Not in the test report: PFAS (sum). Missing parameters are neither estimated nor counted as harmless: the score is based only on the values available. 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 TW 26-000166.001 vom 09.03.2026, Wasserwerk Stromberger Straße, Probenahme 11.02.2026 (Stadtwerke Bad Kreuznach (Analyse: chemlab GmbH, Bensheim)) · SHA-256 of the evaluated file: 7993c5cddf077bea…, checked on 1 November 2026
Suggested citation: Trinkwassermonitor (2026): Tap water in Bad Kreuznach. Values according to the water supplier’s test report, sampling date 11 February 2026; at the waterworks, not household plumbing. https://trinkwassermonitor.ink/en/tap-water/bad-kreuznach/
JSON: /api/v1/evidence?city=bad-kreuznach
Data as of: 11 February 2026 · verified: 22 of 22 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 Bad Kreuznach. Retrieved from https://trinkwassermonitor.ink/en/tap-water/bad-kreuznach/.”