Why is the price of tap water per litre increasing?

Tap water rates will increase on 1 January 2027. This is necessary because Waternet needs to continue investing in the tap water supply. More people need tap water, and we want to better protect our water sources from contamination. The costs of staff, materials and maintenance work are also rising. Additionally, we need to maintain and replace pipes and equipment. 

As a result, tap water will become more expensive in 2027. However, the rates actually fell in 2025 and 2026. So looking at a longer period, the increase is relatively small. An average household using 100 cubic metres of water per year will pay around 3% more in 2027 than in 2024.