Coachella Valley – Indio

Source: CA DWR

Coachella Valley – Indio



Located in California’s Colorado River hydrologic region, the Coachella Valley – Indio is 297,156 acres in size. This Medium priority basin is home to an estimated 368,852 people (2010 value), which have been at a rate of 81.75.

Coachella Valley – Indio is a(n) basin with approximately 2550 wells, of which approximately 227 are water supply wells. Groundwater accounts for approximately 55.00 percent of the basin’s water supply.

Source: CA DWR
Source: CA DWR

Basin Notes

2003: Bulletin 118 basin description

2014: CASGEM prioritization – medium. Comments:  Nitrates and addition of salts due to Colorado River imported water. Local areas of elevated fluoride.

2016: Basin boundary modification request deemed incomplete.

2017: Coachella Valley Water District v. Agua Caliente Band of Cahuilla Indians, Scotus Blog

Supreme Court won’t hear California water agencies’ appeal in tribe’s groundwater case, Desert Sun

2018: Draft basin priority – high. Comments:

  • Levels – Groundwater basin has been in a state of overdraft in varying degrees for several years. Source: 2010 Urban Water Management Plan, Indio Water Authority
  • Subsidence – ) It may be noted that preliminary results from a high-precision GPS survey in Sept/Oct 2015 indicate that much of the basin stopped subsiding since Sept 2010. The preliminary results also indicate that some areas near Palm Desert, Indian Wells, and La Quinta subsided since 2010, albeit at reduced rates compared to subsidence rates before 2010. Source: USGS; submitted via email to DWR, 10/21/2016 – Subsidence has been documented in the Indio Basin. Land subsidence, groundwater levels, and geology in the Coachella Valley, California, 1993-2010, (USGS)
    2) “USGS has commenced their next round of subsidence monitoring in the Coachella Valley. This report will be available in 2018. Since 1990, CVWD has invested over $1 million to monitor land subsidence in the region.” Source: Coachella Valley Water District SMGA Alternative GSP (2016).
  • Inter-basin flow – Groundwater moves from Mission to Desert Hot Spring via urban districts and basin overlapping boundaries. No records on the amounts

2018 Final Basin Prioritization: Basin priority remains at medium priority.

GSA Information