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Office of Energy & Sustainable Development (OESD)
Office of Energy & Sustainable Development (OESD)

Water Topic Listing

Model Water Efficient Landscaping Ordinance - In compliance with State and local requirements, City of Berkeley requires permitted projects with new landscape area of 500 square feet or greater and renovated landscape area of 2,500 square feet or greater to comply with the following regulations in order to reduce waste in both new and established landscapes: [more...]

Home Graywater Collection Systems - What is graywater?
Graywater
 is untreated household wastewater generated from hand washing, laundry and bathing. This wastewater can be diverted from the sewer to irrigate outdoor plants and landscape.  Graywater cannot include any wastewater from toilets, kitchen sinks, dishwashers or washing machines laundering soiled diapers or other sources of contamination such as darkrooms.  Graywater cannot be stored for more than 24 hours. Graywater is different than potable tap water and requires specific measures for its safe reuse in your garden. 
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Graywater Clothes Washer System: Laundry to Landscape - Washing machine systems are the least complicated type of graywater system. They are great for gardens with minimal irrigation needs, are low-cost, easy to install, and require very little maintenance. No permit is required for a clothes washing machine, providing all system design and code requirements are met as outlined in the California Plumbing Code. Permits are required for systems that include tanks or pumps.  [more...]

Residential Rainwater Harvesting Systems - What is a Rainwater Harvesting System? Rainwater harvesting is collected precipitation from rooftops and other above-ground impervious surfaces that is stored in catchment tanks for later use. Rainwater harvesting systems can range from a simple barrel at the bottom of a downspout to multiple cisterns with pumps and filtration. Untreated rainwater can be used to water all your outside plants – including edible plants.  rain_barrel_en-2.jpg [more...]

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Office of Energy & Sustainable Development (OESD), 1947 Center Street, 1st Floor, Berkeley, CA 94704
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