Newsletter by the Swiss Blue Community VSA – Verband Schweizer Abwasser- und Gewässerschutzfachleute (Association of Swiss Wastewater and Water Protection Experts):
Prolog: A holistic approach is urgently needed.
By Nicolas Eichenberger, Head of Laboratory and Quality Assurance, Viteos.
Developments in the area of drinking water resources are increasingly cause for concern, both in terms of quantity and quality. We don’t even have to look back too far: the memory of chlorothalonil and its degradation products is still fresh. The extensive group of PFAS and TFAs, as well as the recent 1,2,4-triazole found in Lake Geneva, have also lost none of their relevance. At the same time, available quantities are fluctuating more significantly, requiring compromises in their use, which sometimes leads to conflicts over resource allocation.
These problems, while not entirely new, are becoming increasingly numerous and demand a high degree of adaptability from drinking water suppliers. However, not all of them possess the necessary resources to gain a detailed understanding of their water resources. This is essential for identifying emerging problems early and addressing them proactively.
Added to this are the already well-documented effects of climate change: drier summers with longer periods without precipitation, leading to problems with water availability and storage – particularly in regions without natural water reservoirs – contrast with heavy rainfall events that do not coincide with demand and can, in some cases, impair water quality. The water cycle, which has historically been relatively stable in Switzerland, is being significantly disrupted by the increase in these extremes.
In light of these challenges, a holistic approach involving all stakeholders is needed. The federal government, the cantons, and the Swiss Gas and Water Industry Association (SVGW) have been addressing this issue for several years, as the focus topics of recent issues demonstrate. The articles in this issue underscore the importance of gaining a better understanding of aquifers, monitoring water quality trends, incorporating legislative changes, considering the role of building installations, and examining issues at the regional level, particularly regarding planning to ensure the availability of additional water or emergency water reserves. All of these points can serve as inspiration for further consideration by drinking water suppliers within their respective contexts.
Source: VSA Aqua & Gas Newsletter (German)
