Groundwater Ambient Monitoring & Assessment Program Priority Basin Project

in cooperation with the California State Water Resources Board"

Rainier River

The Groundwater Ambient Monitoring and Assessment Program Priority Basin Project (GAMA-PBP) is a statewide, comprehensive assessment of groundwater quality designed to:

Describe and explain patterns in groundwater quality

Determine where and to what extent groundwater meets drinking water quality benchmarks

Determine how groundwater quality is changing at the basin scale

Identify the natural and human factors affecting groundwater quality

Click the "Select" tab to select layers.

Map Layers

Counties
Tribal Lands
Watersheds
Major Rivers
Principal Aquifers

GAMA Study Areas

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STUDY AREA COLOR
Groundwater resources used for public supply
Groundwater resources used for domestic supply

Counties

Data Source: USGS

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County boundary

Tribal Lands

Comments: Depicts the Bureau of Indian Affairs' Indian Land Areas Map of federally recognized Tribes. Areas include Reservations, Public Domain Allotments, and Trust or Restricted Fee land.

Data Source: USGS

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Tribal land

Watersheds

Comments: Watershed boundaries are determined by hydrologic units.

Data Source: USGS

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Watershed boundary

Major Rivers

Comments: Depicts the National Hydrography Dataset (NHD) that encodes information about naturally occurring and constructed bodies of surface water (lakes, ponds, and reservoirs) and paths through which water flows (canals, ditches, streams, and rivers).

Data Source: USGS National Map

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Waterbody
Stream
Intermittent Stream

Principal Aquifers

Comments: Color group determines general aquifer type. Color groups are sub-divided into more detailed aquifer classifications as shown here.

Data Source: USGS National Water Information System: Mapper

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Blues Unconsolidated and semiconsolidated sand and gravel aquifers
Greens Sandstone aquifers
Purples Sandstone and carbonate-rock aquifers
Browns Carbonate-rock aquifers
Reds Igneous and metamorphic-rock aquifers
White Other