As the end of summer nears and cooler weather sets in, many pool owners are preparing to winterize their swimming pools. If you need to drain your pool, be sure to follow these guidelines to protect our stormwater system and the environment.
Dissipate Pool Chemicals
Pool chemicals like chlorine and bromine can harm fish, insects, and plants. Before draining your pool, make sure the water is free of chlorine (less than 0.1 parts per million), algaecides, and other pollutants.
Typically, waiting 10 days after the last chemical treatment is enough to dissipate chlorine. Ensure the water’s pH levels are within the normal range (6 to 9). If you need chlorine neutralizers, pH adjustment chemicals or test kits, visit your local pool supply store. Always test your pool water for chemicals and pollutants before discharging it to a safe location.
Determine a Safe Drainage Location
Whenever possible, discharge pool water to the wastewater sewer system. If that’s not an option, you can release the water onto your property or into the stormwater sewer system, but only if the water is clear, dechlorinated and has a neutral pH.
- Ensure the water does not flow onto neighboring properties.
- Avoid allowing water to pool for long periods, as this can lead to odors and mosquito breeding.
- Drain your pool slowly to prevent soil erosion, flooding and property damage. The recommended discharge rate is 25 gallons per minute or less.
Special Considerations for Saltwater Pools
Saltwater pools require extra care when draining. Filter backwash water or discharge from saltwater pools should not enter storm drains or streams. Instead, discharge it to the wastewater system or a location where it won’t run off into storm systems or streams.
Avoid Illicit Discharges
It is illegal to discharge water containing cleaning chemicals, acid buffering compounds, algae or other pollutants into the street, stormwater system or streams. SD1 monitors illicit discharges, so if you see something suspicious, report it.
By following these end-of-summer guidelines, you’ll help protect our waterways and the environment. Thank you for doing your part!