Groundwater Sustainability Agencies
(The information below is pulled from state websites)
The Sustainable Groundwater Management Act (SGMA) established a new structure for managing California’s groundwater resources at the local level by local agencies. SGMA required Groundwater Sustainability Agencies (GSAs) to form in the State’s high- and medium-priority basins and subbasins by June 30, 2017. Over 260 GSAs in over 140 basins were formed by SGMA’s initial planning milestone. However, as SGMA continues to be implemented and the priorities and boundaries of some basins change, new GSAs will be formed, and existing GSAs may want to reorganize, consolidate, or withdraw from managing in all or part of a basin. All GSA formation notifications are managed on DWR’s SGMA Portal.
For basins that received a new high- or medium-priority designation in 2019, local agencies overlying those basins will have two years from the date of reprioritization to either establish a GSA or submit an Alternative plan. The Water Code states that a GSA shall have five years from the date of reprioritization to be managed under a Groundwater Sustainability Plan (GSP). The planning deadline for California’s first round of GSPs is January 31, 2020, for basins subject to critical conditions of overdraft, and January 31, 2022, for all other high- and medium-priority basins.
DWR revised its GSA Frequently Asked Questions and GSA Formation Notification Guidelines documents in May 2019 to address updates to SGMA and the modification of basin boundaries. The revised documents are included below in the Publications section of this webpage. A list of GSAs that have been affected by a basin boundary modification is also included below.
Basin | GSA Name | ||
---|---|---|---|
Delta-Mendota | Farmers Water District GSA
County of Fresno GSA – Delta-Mendota Management Area A County of Fresno GSA – Delta-Mendota Management Area B |
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Kings | James GSA | ||
Westside | County of Fresno GSA – Westside | ||
Pleasant Valley | Pleasant Valley GSA |
Basin | GSA Name |
---|---|
Cuyama Valley | Cuyama Basin GSA |
Tulare Lake | El Rico GSA |
Tule | Delano-Earlimart Irrigation District GSA |
Kern County | Buena Vista Water Storage District GSA
Greenfield County Water District GSA Henry Miller Water District GSA Semitropic Water Storage District GSA |
White Wolf | White Wolf GSA |
Castac Lake Valley | Castac Basin GSA |
Indian Wells Valley | Indian Wells Valley Groundwater Authority GSA |
Basin | GSA Name |
---|---|
Indio | Coachella Water Authority GSA
Indio Water Authority GSA – Indio – indio Coachella Valley Water District GSA – Indio Desert Water Agency GSA – Statutory Area – Indio |
Mission Creek | Coachella Valley Water District GSA – Mission Creek
Desert Water Agency GSA – Statutory Area – Mission Creek Mission Springs Water District GSA – Mission Creek Desert Water Agency GSA – Non-Statutory Area – Mission Creek |
Desert Hot Springs | Indio Water Authority GSA – Desert Hot Springs – DHS |
San Gorgonio Pass | San Gorgonio Pass GSA
Desert Water Agency GSA – Statutory Area – San Gorgonio Pass |
Riverside Arlington | Western Municipal Water District GSA – Riverside-Arlington |
Yucaipa | Yucaipa Basin GSA |
San Timoteo | San Timoteo Subbasin GSA |
Temescal | Temescal Subbasin GSA |
Elsinore Valley | Elsinore Valley GSA |
Bedford-Coldwater | Bedford-Coldwater Subbasin GSA |
San Jacinto | West San Jacinto GSA |
Basin | GSA Name |
---|---|
Bear Valley | Bear Valley Basin GSA |
Basin | GSA Name | ||
---|---|---|---|
Kaweah | Mid-Kaweah GSA | ||
Tulare Lake | Mid-Kings River GSA | ||
Tule | Alpaugh GSA
Delano-Earlimart Irrigation District GSA Lower Tule River Irrigation District GSA |
Basin | GSA Name |
---|---|
Cuyama Valley | Cuyama Basin GSA |
Carpinteria | Carpinteria GSA |
Ojai Valley | Ojai Basin Groundwater Management Agency GSA |
Upper Ventura River | Upper Ventura River Groundwater Agency GSA |
Oxnard | Camrosa Water District GSA – Oxnard |
Mound | Mound Basin GSA |
Santa Paula | County of Ventura GSA – Santa Paula Basin Outlying Areas |
Fillmore | Fillmore and Piru Basins GSA – Fillmore |
Piru | Fillmore and Piru Basins GSA – Piru |
Santa Clara River Valley East | Santa Clarita Valley GSA |
Pleasant Valley | County of Ventura GSA – Pleasant Valley Basin Outlying Areas
Fox Canyon Groundwater Management Agency GSA – Pleasant Valley |
Arroyo Santa Rosa Valley | Arroyo Santa Rosa Basin GSA
Fox Canyon Groundwater Management Agency GSA – Arroyo Santa Rosa Valley |
Las Posas Valley | Fox Canyon Groundwater Management Agency GSA – Las Posas Valley
Camrosa Water District GSA – Los Posas Valley County of Ventura GSA – Las Posas Valley Basin Outlying Areas |