Swimming Ponds and Natural Pools in Altadena
We build Recreational Ponds used for swimming
What is a Swim Pond?
At California Waterscapes, we create custom swimming ponds and natural pools designed to suit the natural beauty of Altadena. Also referred to as recreation ponds or natural swimming lakes, these water features are large custom-built ponds made for both swimming and relaxation. Every design is tailored to your preferred size, shape, and depth.
Optional Upgrades For Swim Ponds
Enhance your swim pond with premium features such as:
- UV light sterilizing filtration
- Greater depth for swimming areas
- Built-in steps or a beach-style entry
- Flagstone base in place of gravel
- External pump systems for added circulation
How Are Swim Ponds Filtered?
Our swim ponds use a natural two-part filtration process that mimics traditional pools without harsh chemicals.
The first is a mechanical filter or skimmer that removes floating debris like leaves and dust from the water surface.
The second is a biological filter that uses beneficial bacteria to break down nutrients and maintain clarity. In larger systems, we install a wetland filter that enhances water quality through natural ecological processes.
How much do Swim Ponds Cost?
The average cost of swimming ponds and natural pools in Altadena ranges between $50,000 and $200,000, depending on size, depth, and custom features. Projects that go beyond typical swimming pool sizes, such as pond-lakes, may exceed $250,000.
Are Swim Ponds More Affordable Than Concrete Pools?
Yes. Swim ponds and natural pools are generally less expensive per square foot than conventional pools. With fewer materials and a simpler construction method, our approach provides a cost-effective and environmentally conscious alternative.
How We Design & Build Ponds
We specialize in ponds that look like natural parts of the landscape. Using a flexible rubber liner, hand-placed boulders, aquatic plants, and organic finishes, we shape each pond to blend perfectly into your outdoor space.
Key features include:
- Rubber liner from PondGuard Aquascape
- Naturally curved edges with boulders and greenery
- Gravel or flagstone bottom
- Concealed filtration integrated into the pond design
Do I need fish in my Swim Pond?
Fish play an important role in a healthy pond ecosystem. They help manage algae and improve water quality. If you prefer not to keep large fish, we recommend adding small species like minnows to support filtration.
Fish and Aquatic Life for Natural Pools:
- Koi
- Goldfish
- Mosquito Fish
- Tilapia
- Catfish
- Bass
- Trout
- Shubunkin
- Sturgeon
- Golden Rudd
- Banded Shark Algae Eater
- Gobi Algae Eater
- Frogs (raised from tadpoles)
- Turtles



