Substances in the water

Many products and agents containing chemicals have been used in society for decades, for a multitude of applications in all kinds of sectors and also by consumers. Chemicals are therefore everywhere in our living environment. The Rijksoverheid determines which agents and substances are allowed, for which applications, where they may be used and what the standards are for them. And new substances are added every year. However effective the properties of these substances are, they also have a downside. Exposure to chemicals can have a negative impact on our health. And when used or processed, these chemicals can be released and released into the environment. Some substances like PFAS are persistent; they don't break down or are difficult to break down. And once they get into surface water, they have a negative effect on water quality, on life in and around the water. 

Working together for clean and healthy water

As long as these kinds of agents are allowed to be used, there is a chance that they will end up in the surface water. HHNK does not want these agents and the substances they contain in the surface water. It is therefore important that all parties, authorities, supervisors and inspectors, entrepreneurs and managers make an effort to prevent and, if that is not possible, to limit emissions into the surface water. We are committed to this and work closely with and encourage others to take measures.

Considerable strides have already been made in improving water quality, especially in the area of ecological water quality, over the past few decades, for example with the advent of sewers, sewage treatment plants, permits, discharge policies and standards for plant protection products. But there is still much to do, also in terms of chemical water quality. It is important to realize that water quality problems arise over a long period of time and therefore often cannot be solved in one day. This requires many measures and broad efforts from many parties. For example, as part of the Water Framework Directive approach, the Agricultural Portal NH has been set up with the agricultural sector. And work is being done with other authorities and site managers on design measures such as nature-friendly banks.

Nowadays, there is increasing attention for micro-pollutants (medicine residues, pesticides, microplastics, hormone-like substances and PFAS). We are working on new techniques to remove these substances from sewage and improvements in indirect discharges. To monitor water quality, we conduct regular surveys and measurements and publish these measurement data on public databases such as Aquadesk. When it comes specifically to pesticides, these data are published by others on pesticidesatlas.nl. We measure in the context of water quality. However, water quality standards say nothing about the effects on public health. Only the GGD can say something about that. For questions about this, please contact the GGD.

Unwanted substances in the water

Despite these efforts, it appears that undesirable chemicals are still found in surface water. This can be found in the public database Aquadesk to which we provide our data. If we find that there are substances in the water that do not belong there or that exceed the standard, our enforcers and supervisors take action and we notify the Dutch Food and Consumer Product Safety Authority (NVWA). 

See also

Plant protection products (Union of Water Boards)

Frequently Asked Questions

What is the water quality near location ...?

At HHNK, we regularly measure the quality of surface water. By examining what is in the water - such as nutrients, oxygen and possible harmful substances - we get a good picture of the state of the water. We also look at the life in the water, such as fish and aquatic plants, to determine if the ecosystem is in balance. These measurements help us to protect nature, ensure the safety of the water for recreational use and check that we comply with European agreements, such as the Water Framework Directive (WFD).

For water quality data, consult the following sources; 

Surface water standards for the WFD are based on a combination of ecological and chemical objectives set at the European level. The ecological objectives focus on a healthy ecosystem, in which plants and animals can live well. The chemical objectives are aimed at preventing harmful effects on ecosystems and indirectly on human and animal health through the consumption of fish and shellfish. 

If you have additional questions about water quality, we are happy to help. Please use the notification form to contact us.

Can I use surface water to irrigate crops or livestock?

HHNK makes no statements about this. For advice on the use of surface water for sprinkling or livestock watering, please contact specialized parties such as a horticulturist, agricultural advisor or a laboratory offering water analysis. Specifically for the cultivation of potato and tomato, the Dutch Food and Consumer Product Safety Authority (NVWA) may impose a sprinkler ban for certain areas. 

If you have additional questions about water quality, we are happy to help. Please use the notification form to contact us.

Can I have a water quality measurement done through HHNK?

This depends on what the measurement refers to. 

  • For surface water quality, we do not, beyond our regular monitoring.
  • In swimming water, we perform additional measurements in some cases when Weil's disease and swimmer's itch are suspected.
  • In the event of plant/fish/animal mortality, we sometimes perform additional measurements.

If you have additional questions about water quality, we are happy to help. Please use the notification form to contact us.