Pool & Spa Filling
Under Level 1 water conservation requirements, there are no restrictions for draining, re-filling, and topping off pools and spas with potable water.
Tips for Saving Water
- To limit evaporation, the City recommends covering swimming pools and spas when not in use. This will keep your pool cooler and reduce evaporation by 30-50%. An average sized pool can lose about 1,000 gallons a month if left uncovered.
- Avoid jumping into the pool or excessive splashing
- Drain your pool or spa, only as necessary, when repairing a leak.
- Turn off fountains, waterfalls, or other water features when they are not in use or you are on vacation.
- Check for leaks and quickly fix any that are found. Depending on the size of the leak, an average-sized pool can waste hundreds of gallons of water per day.
- Backwash pool filters only when necessary. A single backflushing with a traditional filter uses 180-250 gallons of water. If possible switch to a cartridge filtration system. It saves water and does not require backwashing.
Proper Disposal Procedures
Proper Disposal of Chlorinated Pool/Spa Water:
- The City of Thousand Oaks does not require a permit to drain a pool/spa, but the pool/spa owner is responsible for using proper methods and best management practices (see below).
- Maintain your pool properly; it should require draining no more than once every 5 to 10 years if properly maintained.
- Pump water into a sewer cleanout or other sewer connection located on the property, while carefully monitoring the flow to avoid flooding.
For discharge into the storm drain system:
- De-chlorinate pool/spa to a maximum chlorine level of 0.1 ppm (parts per million) and the pH reading should be between 6-8 prior to draining your pool/spa.
- Ensure your water is clean of algae, debris, and mosquitoes before draining.
- Make certain that the water draining from your pool will not push over trash carts, flood streets, and not pick up dirt, lawn clippings, leaves or other debris as it makes its way to the storm drain.
Discharges from Saltwater Pools & Spas are Prohibited and Illegal!
- Saltwater pools & spas must be hauled for disposal via truck to a proper ocean discharging disposal facility.
- Please Note: Important Notice about Saltwater Swimming Pools and Spas [PDF]
Proper Disposal of Pool Filter Backwash / Cleaning:
- Never dispose of filter material (i.e. diatomaceous earth (DE)) in the street, gutter or storm drain system.
- DE filter waste should be bagged wet and disposed of in the trash.
- If DE filter requires rinsing, it should be rinsed to a landscaped area on the pool/spa owner’s property through a filter bag to catch sediment and then dispose of the bag in the trash.
Adding Chemicals to Your Pool/Spa:
- Always read the directions before using any pool chemical.
- Excess acid in some pools can result in low pH conditions that can strip copper from heating coils, causing copper pollution.
- Avoid the use of environmentally harmful copper based algaecides. Try hypochlorite shock treatment to prevent and treat algae growth.
- Pool chemicals can pose serious hazards. The homeowner is responsible for any chemical contamination released into the environment.
If you have any questions, please call the Public Works Municipal Services Division at 805-449-2499.
Have pool chemicals that you need to dispose? Make an appointment to drop them off at our Household Hazardous Waste Facility.