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. 2023 Jun 22;28(25):2200700. doi: 10.2807/1560-7917.ES.2023.28.25.2200700

Figure 1.

Sewage treatment plants, the Netherlands, 2022 (n = 317)

Shown are locations of all 317 sewage treatment plants in 2022. Sizes of the dots represent the number of persons serviced by the plant. Background colours represent the 25 safety regions of the Netherlands. Safety regions represent the public bodies whose task is to facilitate regional cooperation in dealing with crises, disasters and disruptions of public order.

Figure 1