Guide
In our guides, you'll find everything you need to know about water, water filters and water treatment. From drinking water quality and individual substances to the right filter solutions for home, camping and on the go.
Water
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Water
Where does our drinking water come from? Origin, treatment, qualityRead more ›
Water
Substances in tap water: minerals, hardness, pollutantsRead more ›
Water
The pH value of water: why the limit value protects the pipesRead more ›
Water
How do you measure the quality of drinking water?Read more ›
Water
Heavy metals in drinking water: limit values, origin and filtersRead more ›
Water
Filtering microplastics out of drinking waterRead more ›
Water
Bacteria in drinking water: types, symptoms and limit valuesRead more ›
Water
German Drinking Water Ordinance: which version applies and which limit valuesRead more ›
Water
Is tap water healthy?Read more ›
Water
Drinking water temperature: what reaches the tap and which values applyRead more ›
Water
Legionella filters and protection against legionellaRead more ›
Water
Aerator and jet regulator: the difference and which size fitsRead more ›
Water
Rust in tap water: what the brown colour means and what to doRead more ›
Substances in drinking water
Ingredients
Tap water or mineral water?Read more ›
Ingredients
Pharmaceutical residues in drinking water: contamination and filtrationRead more ›
Ingredients
Water filters for hormones in drinking waterRead more ›
Ingredients
Filtering microplastics out of drinking waterRead more ›
Ingredients
Pesticides in drinking water: limit values, origin and filtersRead more ›
Ingredients
Heavy metals in drinking water: limit values, origin and filtersRead more ›
Ingredients
Bacteria in drinking water: types, symptoms and limit valuesRead more ›
Ingredients
PFAS in drinking water: what the new limit values measure and what they don'tRead more ›
Ingredients
Legionella filters and protection against legionellaRead more ›
Ingredients
Chlorine in drinking water: limit values, risks and filtrationRead more ›
Ingredients
Hard water: harmless to health, technically relevantRead more ›
Ingredients
Asbestos in drinking water and in old asbestos cement water pipesRead more ›
Ingredients
Nitrate in drinking water: limit value, contamination and filtersRead more ›
Ingredients
Plasticisers in water bottles and what PET bottles really containRead more ›
Water filters
Water filters
Why filter water: reasons, benefits and limitationsRead more ›
Water filters
Water filters for the kitchen: the 4 designs and their limitsRead more ›
Water filters
Filtration technologies and filtering methods at a glanceRead more ›
Water filters
Why filter water: reasons, benefits and limitationsRead more ›
Water filters
How do you measure the quality of drinking water?Read more ›
Water filters
Germ growth in jug filters: figures and evidenceRead more ›
Water filters
Activated carbon filters for water: function, performance and choiceRead more ›
Water filters
What is activated carbon: structure, production and key parametersRead more ›
Water filters
Filtering microplastics out of drinking waterRead more ›
Water filters
Water filters for hormones in drinking waterRead more ›
Water filters
Legionella filters and protection against legionellaRead more ›
Water filters
What types of water filter cartridges are there and when should you change them?Read more ›
Water filters
Filtration technologies and filtering methods at a glanceRead more ›
Water filters
Chlorine in drinking water: limit values, risks and filtrationRead more ›
Environment and health
Environment & health
Bioplastics: types, examples, disadvantages and disposalRead more ›
Environment & health
How much water should you drink a day?Read more ›
Environment & health
Bacteria in drinking water: types, symptoms and limit valuesRead more ›
Environment & health
Plasticisers in water bottles and what PET bottles really containRead more ›
Environment & health
Drinking water for clear skin: does it help with spots?Read more ›
Environment & health
Tap water during pregnancy: quantity, carbonation, leadRead more ›
Environment & health
Tap water or mineral water?Read more ›
Camping
Camping
Water treatment in a motorhome: how the water in the tank stays freshRead more ›
Camping
Silver ions in the water tank: what a silver mesh can and cannot doRead more ›
Camping
Saving water in a motorhome: how many litres each use costsRead more ›
Camping
Filling up with water in a motorhome: where to find drinking water on the roadRead more ›
Water quality in vacation destinations
Holiday destination
Tap water in Croatia: safe to drink, the risk lies in the buildingRead more ›
Holiday destination
Tap water in Italy: safe to drink, with two caveatsRead more ›
Holiday destination
Tap water in Spain: good nationwide, varies locallyRead more ›
Holiday destination
Tap water in France: chlorinated by regulation, safe to drink everywhereRead more ›
Holiday destination
Tap water in Portugal: where the national statistics endRead more ›
Holiday destination
Tap water in Switzerland: safe to drink, limit values, hardnessRead more ›
Holiday destination
Tap water in Austria: the figures behind its good reputationRead more ›
Holiday destination
Tap water in Greece: what the drought is changing in the networkRead more ›
Holiday destination
Tap water in the Netherlands: a network without chlorineRead more ›
Holiday destination
Tap water in Denmark: pure groundwater, chlorine-free in the networkRead more ›
Holiday destination
Tap water in Turkey: same limit values, different practiceRead more ›
Holiday destination
Tap water in Sweden: why residual chlorine stays in the networkRead more ›
Holiday destination
Tap water in Norway: from lakes, disinfected with UVRead more ›