Tap water in Oestrich-Winkel

Name: Tap water in Oestrich-Winkel
Creator: Trinkwassermonitor
License: https://creativecommons.org/licenses/by/4.0/

Rheingau-Taunus-Kreis, Hessen · Postcode 65375

This page is a translation of the German version; the German page is authoritative. German version · Report a translation error

Short answer: For Oestrich-Winkel, verified values from the water supplier’s test report: 4 (as of 1 December 2025). All tested parameters with a legal limit (2) meet the limits set by the German Drinking Water Ordinance (TrinkwV). Source: test report by Rheingauwasser GmbH. WaterScore (provisional): 94.7 out of 100 – the test report contains only 1 of 7 core parameters.

Limits of the Drinking Water OrdinancemetAll tested parameters (2), at the waterworks
Data coverageCore parameters: 1 of 7Score provisional

Verified drinking-water values

Parameter	Value	Limit (TrinkwV)	Sampling date	Source	Status
Nitrate	16 mg/L 32 % of the limit	50 mg/L	1 December 2025	Rheingauwasser GmbH (veröffentlicht im GW-Manager-Öffentlichkeitsportal)	verified
pH	7.64	6.5–9.5	1 December 2025	Rheingauwasser GmbH (veröffentlicht im GW-Manager-Öffentlichkeitsportal)	verified
Electrical conductivity	728 µS/cm	–	1 December 2025	Rheingauwasser GmbH (veröffentlicht im GW-Manager-Öffentlichkeitsportal)	verified
Coliform bacteria	0 KBE/100ml	0 per 100 ml	1 December 2025	Rheingauwasser GmbH (veröffentlicht im GW-Manager-Öffentlichkeitsportal)	verified

Note from the test report (in the German original): Rheingauwasser GmbH · Trinkwasseranalyse für das Versorgungsgebiet WVG Winkel, Stand 01.12.2025, veröffentlicht im GW-Manager-Öffentlichkeitsportal (verlinkt im BDEW-Wasserportal), untersucht von Aqua Service Schwerin. Die Werte sind unverändert aus der Datenschnittstelle des Portals übernommen. Laut Wasserportal liegen der Ortsmittelpunkt von Oestrich-Winkel und vier Prüfpunkte rund 1,5 km darum in diesem Versorgungsgebiet. Welches Wasser an einer bestimmten Adresse ankommt, sagt verbindlich der Versorger. Die Werte gelten ab Wasserwerk.

Is a value wrong or out of date? Report an error – we check every report against the original source.

Water at your own tap: The values describe the water the supplier delivers – not automatically the water at your tap. The water supplier is responsible up to the service connection (Hausanschluss); the building owner is responsible for the pipes beyond it. Lead can dissolve from lead pipes, leaded solder joints or old brass fittings, especially when water has stood in the pipes for a long time (stagnant water); this mainly affects buildings constructed before about 1973. If water has stood in the pipes for several hours, let it run until it comes out cool. If you suspect lead pipes, a lead analysis of the stagnant water by an accredited laboratory will help.

Background on household plumbing, not a measurement: in Oestrich-Winkel, 54 % of buildings with living space were built before 1970, and a further 16 % 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 Oestrich-Winkel

Nitrate 16 mg/L – about 32 % 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.
pH 7.64 – within the range of the Drinking Water Ordinance (6.5 to 9.5). The pH determines how corrosive the water is in household plumbing.

Baby food and low sodium: tap water in Oestrich-Winkel 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 Oestrich-Winkel 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)

Values at the waterworks next to the maximum levels for bottled water “suitable for infant food”
Substance	Maximum level	Value in Oestrich-Winkel
Sodium	20 mg/l	not in the report
Nitrate	10 mg/l	16 mg/l – above
Nitrite	0.02 mg/l	not in the report
Sulphate	240 mg/l	not in the report
Fluoride	0.7 mg/l	not in the report
Manganese	0.05 mg/l	not in the report
Arsenic	0.005 mg/l	not in the report
Uranium	0.002 mg/l	not in the report

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. Questions about baby food are answered by your midwife, your paediatrician and the health office (Gesundheitsamt).

Frequently asked questions about tap water in Oestrich-Winkel

Can you drink the tap water in Oestrich-Winkel?

According to the verified values, yes: All tested parameters with a legal limit (2) meet the limits set by the German Drinking Water Ordinance (TrinkwV). WaterScore (provisional): 94.7 out of 100 – the test report contains only 1 of 7 core parameters. This applies to the water from the waterworks – restrictions can only arise from old household plumbing.

Is there PFAS in the tap water in Oestrich-Winkel?

The published analysis by Rheingauwasser GmbH 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.

Do I need to filter my tap water in Oestrich-Winkel?

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)94.7 / 100
Chemical safety100 / 100
Nutrients100 / 100
Data timeliness100 / 100
Data quality86.7 / 100

Data coverage: 1 of 7 core parameters. Not in the test report: Nitrite, Lead, Copper, Arsenic, Uranium and PFAS (sum). 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 v3: how we calculate the WaterScore.

Evidence: cite and check

Trinkwasseranalyse Versorgungsgebiet WVG Winkel, Stand 01.12.2025 (Rheingauwasser GmbH (veröffentlicht im GW-Manager-Öffentlichkeitsportal))

Suggested citation: Trinkwassermonitor (2025): Tap water in Oestrich-Winkel. Values according to the water supplier’s test report, sampling date 1 December 2025; at the waterworks, not household plumbing. https://trinkwassermonitor.ink/en/tap-water/oestrich-winkel/

JSON: /api/v1/evidence?city=oestrich-winkel

Data as of: 1 December 2025 · verified: 4 of 4 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 Oestrich-Winkel. Retrieved from https://trinkwassermonitor.ink/en/tap-water/oestrich-winkel/.”