Castaic Lake Water Agency (CLWA) is a public water agency located in Southern California, United States of America. The agency was established in 1962 to provide water to the Santa Clarita Valley, which is located in the northern part of Los Angeles County. The agency is responsible for managing and delivering water to approximately 300,000 residents and businesses in the area.

CLWA is committed to promoting sustainable practices and reducing its carbon footprint. One of the ways the agency is achieving this goal is through decarbonisation efforts. Decarbonisation is the process of reducing or eliminating the carbon emissions associated with energy production and consumption. CLWA is working to reduce its carbon footprint by transitioning to renewable energy sources and implementing energy-efficient technologies.

The agency has implemented several initiatives to reduce its carbon footprint. One of the most significant initiatives is the installation of a 1.1-megawatt solar array at its Rio Vista Water Treatment Plant. The solar array generates approximately 30% of the plant's energy needs, reducing the agency's reliance on fossil fuels. The solar array has also helped the agency reduce its greenhouse gas emissions by approximately 1,200 metric tons per year.

In addition to the solar array, CLWA has also implemented several energy-efficient technologies. The agency has replaced traditional light fixtures with LED lights, which use significantly less energy and have a longer lifespan. The agency has also installed energy-efficient HVAC systems and implemented a demand-response program, which allows the agency to reduce its energy consumption during peak demand periods.

CLWA has also entered into a corporate power purchase agreement (PPA) with a renewable energy provider. A corporate PPA is a contract between a company and a renewable energy provider, where the company agrees to purchase a certain amount of renewable energy at a fixed price for a set period. The renewable energy provider then builds and operates a renewable energy project to supply the company with the agreed-upon amount of energy. The corporate PPA allows CLWA to purchase renewable energy at a fixed price, reducing the agency's exposure to volatile energy prices.

CLWA is also committed to promoting renewable energy development in the region. The agency has partnered with the Los Angeles Department of Water and Power to develop a 1-megawatt solar project on agency-owned land. The project will generate renewable energy for the agency's operations and provide clean energy to the local community.

Overall, CLWA is committed to promoting sustainable practices and reducing its carbon footprint. The agency's decarbonisation efforts, including the installation of a solar array, implementation of energy-efficient technologies, and corporate PPA, have helped the agency reduce its reliance on fossil fuels and promote renewable energy development in the region. CLWA's commitment to sustainability serves as a model for other water agencies and businesses in the region.