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LakeQuality

Lake water quality by country

Find lakes across Europe, Asia, Oceania, and the Americas. Official bathing-water classes for designated European lakes, and official surface phosphorus, chlorophyll-a, and Secchi for named lakes, each figure the publishing authority's own. Click a pin or a card to open a country.

Lake campgrounds in Europe →Individual lakes on the global map →

Country map

Each pin is a country hub. Open it for that country's lakes, official ratings, and a local map. Individual lakes worldwide are on the global lake map.

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Browse country hubs

Lakes in Germany1,893 swim sites, 53 named lakesLakes in France845 swim sites, 361 named lakesLakes in Italy673 swim sites, 55 named lakesLakes in Netherlands587 swim sites, 5 named lakesLakes in Poland489 swim sites, 748 named lakesLakes in Austria254 swim sites, 3 named lakesLakes in Hungary247 swim sitesLakes in Finland211 swim sites, 4,006 named lakesLakes in Sweden210 swim sites, 55 named lakesLakes in Switzerland135 swim sites, 18 named lakesLakes in Denmark123 swim sitesLakes in Spain109 swim sites, 19 named lakesLakes in Lithuania80 swim sites, 271 named lakesLakes in Belgium77 swim sites, 1 named lakeLakes in Czechia62 swim sitesLakes in Portugal49 swim sites, 19 named lakesLakes in Slovakia40 swim sitesLakes in Croatia34 swim sites, 1 named lakeLakes in Estonia30 swim sites, 101 named lakesLakes in Luxembourg17 swim sitesLakes in Latvia16 swim sites, 34 named lakesLakes in Ireland10 swim sites, 209 named lakesLakes in Slovenia8 swim sites, 9 named lakesLakes in Albania6 swim sitesLakes in Bulgaria4 swim sites, 11 named lakesLakes in Greece1 swim site, 16 named lakesLakes in Romania1 swim siteLakes in Australia20 named lakesLakes in Cyprus9 named lakesLakes in England529 named lakesLakes in Japan188 named lakesLakes in Mexico412 named lakesLakes in New Zealand80 named lakesLakes in Northern Ireland20 named lakesLakes in Norway61 named lakesLakes in South Korea88 named lakesLakes in Taiwan21 named lakesLakes in Uruguay10 named lakes

Frequently asked questions

Which countries have lake water quality data?
LakeQuality publishes official lake water quality by country — lakes in Europe under the EU Bathing Water Directive, plus named-lake phosphorus, chlorophyll-a, and Secchi where a licence-clean catalog exists. Open a country page to browse lakes in that country.
How is bathing water different from other lake measurements?
EU country pages classify designated bathing waters for bacteria (E. coli and intestinal enterococci). Other country pages show official phosphorus, chlorophyll-a, and Secchi from lake monitoring. They measure different things and are never combined into one scale.
Are the country pages rated on one scale?
No. Each country page shows the class or measurement its own authority publishes, as measured. EU bathing waters carry the EU class; named lakes elsewhere carry phosphorus, chlorophyll-a, and Secchi readings.
Where are the lake campgrounds?
Designated European bathing waters whose official names mark them as campgrounds have their own page, grouped by country. The rating there measures bacteria, so it is not a campsite booking or a clearance to swim on a given day.
What is on the country map?
Each pin is a country, not an individual lake. Open a pin for that country's lakes, official ratings, and a local map. To browse individual lakes worldwide, use the global lake map.

Where to stay near lakes in these countries

Lakeside stays across Europe — open a country page for a local map and stays in Mexico, Japan, Australia, and the rest of the directory.

Top-rated places to stay near lakes in these countries

Prices for Oct 2–4, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

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