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Click here for IDWR homepage The Shoshone Falls on the Snake River by Thomas Moran (1900) used courtesy of the Gilcrease Museum


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Hydrologic Services
Idaho Department of Water Resources

Idaho Department of Water Resources
322 East Front Street
Boise, ID 83720-0098
(208) 287-4800

Critical Ground Water & Ground Water Management Areas

Critical Ground Water Areas (CGWA) and Ground Water Management Areas (GWMA) are designated by the Director in areas which appear to have or or may be appproaching insufficient ground water supply.

What is a CGWA and GWMA?

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Designated Ground Water Areas

Critical Ground Water Areas Date Designated cgwa_gwma.gif (10,887 bytes)
Blue Gulch 12/9/1970
Cinder Cone Butte 5/7/1981
Curlew Valley 3/15/1976
Oakley Fan
  • Artesian City
  • Cottonwood
  • Oakley-Kenyon
  • West Oakley Fan
    		•
    1/16/1962
    1/16/1962
    1/16/1962
    1/19/1982
    Raft River 7/23/1963
    Ground Water Management Areas
    American Falls 8/3/2001
    Banbury Hot Springs 4/12/1983
    Bancroft-Lund 10/21/1991
    Bear River 8/12/2001
    Big Wood River 6/28/1991
    Boise Front 6/15/1987
    Grand View-Bruneau 10/29/1982
    Lindsay Creek 3/5/1992
    Mountain Home 11/9/1982
    Rathdrum Prairie 12/11/2002
    Southeast Boise 10/14/1994
    Twin Falls 1/11/1984