Swimming Pool Discharge

Pollution Prevention and Good Housekeeping for Swimming Pool Discharges

In order to protect storm drains, channels, creeks and bays, guidelines have been established regarding the discharge of pool water in the City of Corona. Regulatory issues regarding the discharge of pool water and the two methods by which it may be discharged are explained below.

Acceptable and Preferred Method of Disposal

Before you plan to drain your pool, please contact City of Corona Public Works Department at (951) 736-2266. An Inspector will visit your home to test the level of chlorination in your pool water. Based on the testing and facilities in the area, the Inspector will direct you to discharge to either the storm drain or sewer. Sewer discharge may include pumping to your in-ground sewer clean-out if safe and accessible.
Where the discharge of pool water to the sanitary sewer is not feasible, federal law allows the release of dechlorinated swimming pool water into the storm drain system. In general, the guideline for such releases requires pool owners to ensure that all the following criteria are met:

• The residual chlorine does not exceed 0.1 mg/l (parts per million);
• The pH is between 6.5 and 8.5;
• The water is free of any unusual coloration;
• There is no discharge of filter media;
• There is no discharge of acid cleaning wastes;
• The discharge will not cause erosion; and
• The discharge will not cause transport of pollutants such as: motor oil; pet waste; trash and other debris into the storm drain system.

The Inspector will advise the best method based on each situation. No permit is necessary; however you must have the water tested before discharging.

How can I find out if I'm within the standards?

Compliance with this guidance for pH can be verified using a pool testing kit. If high levels of chlorine are found, either purchasing and administering dechlorination chemicals or simply not adding additional chlorine can cure the situation in a few days. If this occurs, another testing by a City Inspector is necessary prior to discharge; and you must have the water tested by the Public Works Department before you may discharge your pool.

Why is this procedure necessary?

By complying with these guidelines set forth by the City, you are making a significant contribution toward keeping pollutants out of Riverside County's creeks, streams and receiving waters and helping to protect organisms that are sensitive to pool chemicals.

Questions should be directed to:
City of Corona
NPDES/Stormwater Section
(951) 736-2266