A critical aquifer recharge area is a geographical area which provides the recharge to an aquifer(s) which is a current or potential potable water source and, due to its geological properties, is highly susceptible to the introduction of pollutants, or because of special circumstances, has been designated as a critical aquifer recharge area in accordance with WAC
365-190-080 by the city. Critical aquifer recharge areas under this chapter may be established based on general criteria or specifically designated due to special circumstances.
(1) Category I – Critical Aquifer Recharge Areas. The following general criterion is established to designate critical aquifer recharge areas: wellhead protection zones around Group A water system supply wells:
(a) Areas inside the one-year time of travel zone for Group A water system wells, calculated in accordance with the Washington State Well Head Protection Program.
(b) Five-year time of travel zones in wellhead protection areas are included as critical aquifer recharge areas under the following condition: The five-year time of travel zone is included when the well draws its water from an aquifer that is at or above sea level and is overlain by permeable soils listed in subsection
(2)(a) of this section without an underlying protective impermeable layer (see below).
(2) Category II – Aquifer Recharge Areas of Concern. Areas which provide recharge to aquifers that provide current or potential potable water supplies and are vulnerable to contamination, and meet any one of the following general criteria:
(a) Highly Permeable Soils – Locations Where Surface Soil Layers Are Highly Permeable. Soils that have relatively high permeability and high infiltration potential may provide for groundwater recharge, but also may enhance transfer of contaminants from the surface to groundwater. For these reasons the locations where surface soils are highly permeable are considered aquifer recharge areas of concern.
The general location and characteristics of soils in Kitsap County and the city is given in the Soil Survey of Kitsap County by the U.S. Department of Agriculture, Natural Resources Conservation Service (SCS). The soil survey information is available on the Kitsap County geographic information system (GIS). The following soil types are considered to have relatively high permeability and are aquifer recharge areas of concern.
The following soils have relatively high infiltration:
SCS Soil Name | SCS Soil Map Units |
|---|
Grove | 11, 12, 13 |
Indianola | 18, 19, 20, 21 |
Neilton | 34, 35, 36 |
Norma | 37, 38 |
Poulsbo/Ragnar | 41, 42, 43, 44, 45, 46, 47 |
(b) Areas Above Shallow Principal Aquifers. Surface areas above shallow principal aquifer(s) which are not separated from the underlying aquifers by an impermeable layer that provides adequate protections to preclude the proposed land use from contaminating the shallow aquifer(s) below are considered aquifer recharge areas of concern. This generally includes principal aquifers in subsurface hydrogeologic units Og1, Og1a, Og2 and portions of Og3 that are within 300 feet of the ground surface.
(Ord. 018-25, 11/18/2025)