Another option, though very rarely adopted, to structure tariffs for water and wastewater services are seasonal and zonal tariffs. These tariffs try to reflect the potential differences in costs that accrue with service providing in different seasons or local areas. For example, in the dry season, when rivers carry less water they can probably only receive less or better treated wastewater. Similarly, zonal tariff could reflect the higher costs linked with service in remote or extremely dry areas.

Local differences in costs incurring with water supply service are, for example, also reflected in the different prices (fixed charge tariffs) for water services in Lebanon and Palestine, as described in the textbox below.