When you turn on the tap in Antelope Valley, have you ever wondered where that water actually comes from? You’re not alone. In this high-desert region of California, water is a hot topic—literally and figuratively.
With minimal rainfall, rising population demands, and ongoing drought threats, the Valley relies heavily on two main sources: groundwater and imported water. But which one carries more weight? Let’s break it down.
Sources
Antelope Valley gets its water from two primary sources—local groundwater pumped from underground aquifers and imported water delivered via the California State Water Project (SWP). Each source plays a key role, but they serve the region in very different ways.
Groundwater is the traditional lifeline of the Valley. It’s stored naturally in aquifers and accessed through wells. Imported water, on the other hand, travels hundreds of miles from Northern California to Southern California via canals and pipelines—an engineering marvel with its own challenges.
Groundwater
Groundwater has been the backbone of Antelope Valley’s water supply for decades. It’s readily available (as long as aquifers are healthy), and many private wells and public utilities rely on it.
However, the downside? Overdraft. For years, more water has been pumped out than replenished, leading to falling groundwater levels and even land subsidence in some areas. It’s like withdrawing from your savings account without making any deposits—you eventually run dry.
That’s why the region has taken serious steps toward sustainable groundwater management through laws like SGMA (Sustainable Groundwater Management Act) and agencies like the Antelope Valley Watermaster.
Imported
Imported water comes from the State Water Project, originating in the Sierra Nevada snowpack and flowing south via the California Aqueduct. It’s managed locally by agencies like the Antelope Valley-East Kern Water Agency (AVEK), which acts as the region’s wholesale water supplier.
The benefit of imported water is that it supplements local supplies, especially during dry years. However, it’s not always reliable—availability depends on snowpack, rainfall, environmental regulations, and statewide water allocations. Plus, it’s expensive to treat and transport.
In drought years, when SWP allocations drop, Antelope Valley has to fall back on groundwater—sometimes more than is ideal.
Dependence
So which one does the Valley rely on more? It depends on the year. In wet years, imported water flows more freely, and agencies store some of it by recharging groundwater basins. In dry years, when imported water is limited, the region leans harder on groundwater.
Here’s a snapshot of how it usually plays out:
| Source | Typical Use (Normal Year) | Use During Drought |
|---|---|---|
| Groundwater | 60-70% | 80-90% |
| Imported Water | 30-40% | 10-20% |
As the table shows, groundwater remains the dominant source, especially during droughts.
Challenges
Both sources come with their own headaches.
Groundwater issues:
- Overdraft and aquifer depletion
- Land subsidence
- Quality concerns in some wells
Imported water issues:
- Limited availability during droughts
- High treatment and transport costs
- Political and environmental restrictions
This is why Antelope Valley isn’t putting all its eggs in one basket. Diversifying water sources and managing both carefully is key to long-term survival.
Management
To keep things balanced, local agencies use a portfolio approach. AVEK imports and stores water when it’s available. Local water districts invest in infrastructure to pump, treat, and distribute water efficiently. And regional collaboration through groups like AVSWCA ensures everyone’s working together.
Groundwater recharge projects, recycled water use, stormwater capture, and conservation programs are all pieces of the bigger puzzle. It’s not about choosing one over the other—it’s about making both work smarter.
Future
Looking ahead, Antelope Valley is focused on sustainability. With climate change threatening both snowpack and local recharge, the region is planning for all scenarios.
This means more groundwater banking, tighter water-use restrictions, smarter technology, and continued cooperation across agencies. The goal? A reliable, drought-proof water supply that balances both groundwater and imported sources wisely.
So, whether it comes from deep underground or travels hundreds of miles through aqueducts, every drop matters. And the better these sources are managed, the more secure Antelope Valley’s water future will be.
FAQs
What is Antelope Valley’s main water source?
Primarily groundwater, especially in dry years.
Where does imported water come from?
It comes from Northern California via the State Water Project.
Why is groundwater overused?
Because it’s more available when imported water is limited.
Is imported water reliable?
Not always—it’s affected by drought and state allocations.
How is water use managed?
Through collaboration, recharge projects, and regulations.









