The water quality of De Waal Heerjansdam at Heerjansdam
What is the swimming water like? De Waal Heerjansdam? On the water map below you'll see the swimming location in its immediate vicinity. On the right of on this page you will find all information about the current weather, at the bottom of the swimming spots in the area.
Open the Water Map for Heerjansdam in full window
Swimming spots nearby
2. Plas wevershoek: water quality is warning
3. Sandelingen ambacht: water quality is good
4. Vijver oosterpark: water quality is good
5. Waalboezem surfbocht: water quality is good
6. Zwemplas woude: water quality is good
The weather in Heerjansdam, now:
18.2°C
Zwaar bewolkt
Wind Force bft | Knopen | 4 km/h
Wind direction NO
Today: Zonnig en warm, in het noorden wisselend bewolkt.
Extended weather forecast for Heerjansdam (click)
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Swim at De Waal Heerjansdam
Summary
Measurements
E.coli15 n/dl
Enterococci15 n/dl
Cause
There is a warning for blue algae at this swimming spot. So you run the risk of skin irritation and stomach/intestinal complaints if you swim here.
There is a warning for blue algae at this swimming spot. So you run the risk of skin irritation and stomach/intestinal complaints if you swim here.
Water temperature~17.2 °C
Measurement timeQuality: 19-05-2026Temperature: 22 mei, 20:10
Notifications about bathing water quality:
Gemeente Zwijndrecht
gemeente@zwijndrecht.nl
14078
Gemeente Zwijndrecht
gemeente@zwijndrecht.nl
14078
Details
The water temperature value comes from the nearest official Rijkswaterstaat measuring station and is an approximation for this location. Always take local conditions into account, it is usually colder in deeper water than on the shore!
The water quality measurement is based on the amount of bacteria in nanograms per deciliter (n /dl). In this case it concerns the intestinal bacteria Escherichia coli (E.coli) and intestinal enterococci, which occur in the feces of both animals and humans. A suddenly high value is often related to bird droppings in the water, for example, but can certainly also have other causes. It is unwise to swim in water where these values exceed the standards. The water manager also inspects the bathing water areas for other types of pollution, such as blue-green algae or other toxic algae and general safety features.
The water quality measurement is based on the amount of bacteria in nanograms per deciliter (n /dl). In this case it concerns the intestinal bacteria Escherichia coli (E.coli) and intestinal enterococci, which occur in the feces of both animals and humans. A suddenly high value is often related to bird droppings in the water, for example, but can certainly also have other causes. It is unwise to swim in water where these values exceed the standards. The water manager also inspects the bathing water areas for other types of pollution, such as blue-green algae or other toxic algae and general safety features.