Water Quality We make sure our water sources, connections, wells, and pools are safe for all San Franciscans. Resources Backflow assembly testing Test your backflow prevention assembly to protect drinking water Make sure San Francisco’s water supply stays clean and does not get contaminated. Become an authorized backflow prevention assembly tester Get a permit to test backflow prevention assemblies and keep our drinking water clean. Wells Apply to build or destroy a well Get a permit to build or remove a well or soil boring. Apply to operate a production or monitoring well Get a permit to run a well to use groundwater or check conditions. Water reuse systems Apply to build a water reuse system Get a permit to collect and reuse water for irrigation, laundry, and flushing toilets. Swimming pools and spas Apply to operate a swimming pool or spa Submit an application to operate an existing or new public swimming pool or spa. Pool cover requirements Make sure you understand the requirements for the use and storage of your pool cover. Resources for operating a public swimming pool or spa Find requirements, standards, and application forms about managing a public pool or spa. Ocean and beach water quality Checking ocean and beach water quality We test the ocean water at San Francisco beaches to make sure they are clean and safe for all. Cryptosporidiosis Cryptosporidiosis surveillance project reports and resources We keep track of the risk factors of people who get cryptosporidiosis, an illness that causes diarrhea. Health and building codes San Francisco Health Code Article 12A: Backflow City health code for backflow prevention. San Francisco Health Code Article 12B: Borings & Wells City health code outlining soil boring and well regulations. San Francisco Health Code Article 12C: Alternate Water City health code outlining alternate water sources for non-potable applications. San Francisco Health Code Article 15: Pools and spas City health code outlining public swimming pools and spas. California Building Code Chapter 31B [DPH]: Public Pools State code outlining public pool regulations. Departments Department of Public Health Environmental Health