TrinkwassermonitorTap water in Germany

Water hardness and tap water in Worms

Worms, Rheinland-Pfalz · Postcode 67547, 67549, 67550, 67551

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

Short answer: The tap water in Worms has a total hardness of 17.6 °dH, hardness range “hard” (as of February 2026). All tested parameters with a legal limit (20) meet the limits set by the German Drinking Water Ordinance (TrinkwV). Source: test report by EWR (Energie- und Wasserversorgung Rheinhessen). WaterScore: 100 out of 100 (data coverage: 7 of 7 core parameters).

Verified drinking-water values

ParameterValueLimit (TrinkwV)Sampling dateSourceStatus
Nitrate< 1 mg/L50 mg/LFebruary 2026EWR Netz GmbHverified
Nitrite< 0.01 mg/L0.5 mg/LFebruary 2026EWR Netz GmbHverified
PFAS (sum)< 0.001 µg/L0.1 µg/L

February 2026EWR Netz GmbHverified
Lead< 0.001 mg/L0.01 mg/L
February 2026EWR Netz GmbHverified
Arsenic< 0.001 mg/L0.01 mg/L
February 2026EWR Netz GmbHverified
Uranium< 0.0002 mg/L0.01 mg/LFebruary 2026EWR Netz GmbHverified
Mercury< 0.0001 mg/L0.001 mg/LFebruary 2026EWR Netz GmbHverified
Copper< 0.01 mg/L2 mg/LFebruary 2026EWR Netz GmbHverified
Cadmium< 0.0002 mg/L0.003 mg/LFebruary 2026EWR Netz GmbHverified
Chromium< 0.0005 mg/L0.025 mg/L
February 2026EWR Netz GmbHverified
Nickel< 0.002 mg/L0.02 mg/LFebruary 2026EWR Netz GmbHverified
Chloride17 mg/L250 mg/LFebruary 2026EWR Netz GmbHverified
Sulphate67 mg/L
250 mg/LFebruary 2026EWR Netz GmbHverified
Sodium10 mg/L200 mg/LFebruary 2026EWR Netz GmbHverified
Calcium107 mg/L–February 2026EWR Netz GmbHverified
Magnesium11.6 mg/L–February 2026EWR Netz GmbHverified
pH7.466.5–9.5February 2026EWR Netz GmbHverified
Total hardness17.6 °dH (hard)no legal limitFebruary 2026EWR Netz GmbHverified
Electrical conductivity624 µS/cm–February 2026EWR Netz GmbHverified
Fluoride< 0.1 mg/L1.5 mg/LFebruary 2026EWR Netz GmbHverified
Iron< 0.02 mg/L0.2 mg/LFebruary 2026EWR Netz GmbHverified
Manganese< 0.005 mg/L0.05 mg/LFebruary 2026EWR Netz GmbHverified
Ammonium< 0.05 mg/L0.5 mg/LFebruary 2026EWR Netz GmbHverified
Trihalomethanes (THM)< 1 µg/L50 µg/LFebruary 2026EWR Netz GmbHverified

Note from the test report (in the German original): EWR Netz GmbH · Trinkwasseranalyse für das Hauptversorgungsgebiet Worms mit Werten „Stand Februar 2026“ (Dokument vom April 2026). Ein Probenahmedatum nennt das Blatt nicht, deshalb ist nur der Monat angegeben. Der Stadtteil Ibersheim wird getrennt versorgt und hat ein eigenes Analyseblatt mit abweichenden Werten, u. a. Härte 14,2 °dH statt 17,6 °dH, Natrium 77 statt 10 mg/l und Sulfat 93 statt 67 mg/l. Eine Zeile für coliforme Bakterien oder E. coli enthält das Blatt nicht (mikrobiologisch nur Koloniezahlen und Clostridium perfringens, jeweils 0), deshalb fehlt dieser Wert hier.

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 Worms, 57 % of buildings with living space were built before 1970, and a further 11 % 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 Worms

Water hardness in Worms in everyday life

At 17.6 °dH, Worms is in the hardness range “hard” (soft: below 8.4 °dH, medium: 8.4–14 °dH, hard: above 14 °dH).

Baby food and low sodium: tap water in Worms 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 Worms 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”
SubstanceMaximum levelValue in Worms
Sodium20 mg/l10 mg/l – not above
Nitrate10 mg/lbelow the detection limit (1 mg/l) – not above
Nitrite0.02 mg/lbelow the detection limit (0.01 mg/l) – not above
Sulphate240 mg/l67 mg/l – not above
Fluoride0.7 mg/lbelow the detection limit (0.1 mg/l) – not above
Manganese0.05 mg/lbelow the detection limit (0.005 mg/l) – not above
Arsenic0.005 mg/lbelow the detection limit (0.001 mg/l) – not above
Uranium0.002 mg/lbelow the detection limit (0.0002 mg/l) – not above

Against the other thresholds of Annex 6, the water would qualify as: low in sodium (“suitable for a low-sodium diet”) (Sodium 10 mg/l, threshold below 20 mg/l).

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 Worms

Can you drink the tap water in Worms?

According to the verified values, yes: All tested parameters with a legal limit (20) meet the limits set by the German Drinking Water Ordinance (TrinkwV). WaterScore: 100 out of 100 (data coverage: 7 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 Worms?

The total hardness is 17.6 °dH – hardness range “hard”. Dose detergent for the hardness range “hard” – a larger amount is needed; a water softener for the washing machine can save detergent.

Is there PFAS in the tap water in Worms?

Not in measurable amounts: according to the published analysis by EWR (Energie- und Wasserversorgung Rheinhessen) (as of February 2026), PFAS were below the laboratory’s limit of quantification. Since 12 January 2026, a limit of 0.1 µg/l has applied to the sum of PFAS-20. This means the sum of the four substances PFOA, PFOS, PFNA and PFHxS (PFAS-4) is also below the limit of 0.02 µg/l, which applies from 12 January 2028.

Do I need to filter my tap water in Worms?

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

Data coverage: 7 of 7 core parameters. 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 v3: how we calculate the WaterScore.

Evidence: cite and check

Suggested citation: Trinkwassermonitor (2026): Tap water in Worms. Values according to the water supplier’s test report, sampling date February 2026; at the waterworks, not household plumbing. https://trinkwassermonitor.ink/en/tap-water/worms/

JSON: /api/v1/evidence?city=worms

Data as of: February 2026 · verified: 24 of 24 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 Worms. Retrieved from https://trinkwassermonitor.ink/en/tap-water/worms/.”

Further information