建立本地供应

Native plant garden weymouth

认为区域, 当地的行动

Metropolitan was born out of the need to import water from hundreds of miles away to support a growing region. But as Southern California has evolved, so too has Metropolitan. Today, we are far more than just water importers. We are builders and planners, making large-scale investments in local supplies to complement our imported supplies. Our support of conservation, water-use efficiencies and diverse local resource programs like water recycling, 海水淡化, groundwater recovery and storage have provided close to over 78 million acre-feet to the region’s resource mix, greatly increasing our resiliency and reliability. And we’ve only just begun. Metropolitan is in the process of developing what could be the largest water recycling facility in the world – Pure 水 Southern California.

It’s not an either-or situation -- we’re developing local resources and shoring up our imported supplies. Each piece of our supply portfolio depends on the other. One insures us against the other’s vulnerabilities. When imports are challenged by drought cycles or natural disasters, local resources and conservation programs can help meet regional demands. 反过来, high-quality imported supplies are necessary for recycling and groundwater replenishment programs. Working together, these sources provide Southern California with reliable water. Having access to a mix of water resources has protected the region from the impacts of drought cycles, climate change and extreme weather.

El Toro 水 District 再生水 Expansion

本地物料供应 区域的可靠性

When a local supply is developed -- whether it is in Ventura, 圣地亚哥, or any community in between -- all Southern California benefits. Our regional cooperation and interdependence mean one community’s recycling or groundwater cleanup project decreases the burden on 都市的 imported supplies as a whole. That reduces operating costs, frees up conveyance capacity to benefit all system users and helps the region adapt to climate change. That is why Metropolitan supports and incentivizes several beneficial programs and initiatives that help the region develop local supplies and conserve. 我们投资了1美元.6 billion in these programs to date. For a rundown synopsis of achievements, 点击这里 and for the full Achievement 报告 in 保护, Recycling and 地下水 Recharge 点击这里.

都市的 本地资源计划 provides incentives for member and local agencies to develop new local projects, such as water recycling and groundwater recovery. Metropolitan has provided financial assistance to more than 100 projects across Southern California, 产出大于1.3 trillion gallons of recycled water and recovered groundwater. 的 value of regional reliability is elevated today in the face of critical shortages in the two main sources of imported water supplies. By providing direct funding based on how much water projects produce, the program has significantly increased their economic viability.

的 numbers tell a success story. 在20世纪90年代, nearly 60 percent of 都市的 supply portfolio was water imported from the 科罗拉多河 and the 国家水利工程. 的 balance was from local resources. A shift in the supply paradigm model shows a 2035 mix of about 36 percent imported supply and 64 percent local resources.

本地供应目标

本地资源

Ensuring reliable water for Southern California requires investing in local water supplies from diverse sources along with widespread conservation.

An unusual rushing LA River.

雨水

每年大约1个.1 million acre-feet of rainfall and 雨水 flows are captured and recharged into local groundwater basins. As drought conditions continue and climate change continues to take hold, t在这里 is a growing interest in developing additional water supply through 雨水 capture and use. 在回应, Metropolitan launched two pilot programs to better understand the costs and benefits of 雨水 capture, 2020年产量和使用情况. One program looks at opportunities to capture additional 雨水 for direct use. 的 other explores additional 雨水 capture for groundwater recharge. Together, Metropolitan has committed $12.5 million to these programs. 的 data collected will help us evaluate the water supply benefits of 雨水 capture and provide the framework for future funding strategies.

未来供应行动

Metropolitan also is investing in re搜索 to develop future local water supplies through innovative approaches. Through the 未来供应行动 Funding Program, Metropolitan co-funds member agency pilot projects and technical studies aimed at increasing the potential of recycled water, 雨水, groundwater and seawater 海水淡化. Metropolitan has so far invested $6.5 million in more than two dozen studies. 项目目标包括:

  1. Reducing barriers to future resource production
  2. Providing results that are unique, yet transferable
  3. Advancing the field of knowledge
  4. Targeting critical paths to water resource implementation

Since the initial round of funding in 2013, Metropolitan has co-funded 34 pilot tests, demonstration studies and white papers.  Study reports are available 在这里.

A feasibility study examines cost-effective disinfection treatment to meet advanced water treatment regulations undertaken by the 圣地亚哥 County 水 Authority and subagency Padre Dam Municipal 水 District.


Detail photo from the Fallbrook 地下水 Desalter Project.

海水淡化

Metropolitan has explored seawater 海水淡化 as a potential new supply since the 1960s, and we even developed and piloted our own thermal distillation technology.

While 海水淡化 technology has been used to treat and recover brackish groundwater for decades, the cost of treating seawater was not historically competitive with other resources. 在过去的十年里, rapid improvements in membrane performance, energy recovery technology and process design have lowered seawater 海水淡化 costs, 使它, 在某些情况下, competitive with other new supply options.

自2001年以来, Metropolitan has provided financial incentives for our member agencies to develop local seawater 海水淡化 projects, and seawater 海水淡化 became part of our 本地资源计划 in 2014. Metropolitan is considering a new regional 海水淡化 facility as a possible addition to its drought action portfolio of projects.