Overview

Los Angeles County has achieved a significant milestone by capturing over 120 billion gallons of stormwater during the recent rainy season, a remarkable increase compared to the previous year. This effort is part of the county's ongoing initiative to bolster its groundwater supply and prepare for potential drought conditions.

The captured water, which is enough to supply 3 million people for a year, underscores the importance of sustainable water management in a region prone to dry spells.

Key details

  • LA County captured more than 120 billion gallons of stormwater during the latest rainy season.
  • This amount is ten times greater than the stormwater captured in the previous year.
  • The water was collected between November 2025 and March 2026.
  • The captured stormwater will help replenish the county's groundwater supply.
  • The volume of water can meet the annual needs of approximately 3 million residents.
  • LA County has a total population of about 9.7 million people.
  • Investments have been made to enhance stormwater capture in the county's reservoirs.
  • These efforts are in anticipation of potential drought or dry conditions.
  • LA County Supervisor Lindsey Horvath emphasized the importance of capturing every gallon to reduce reliance on imported water.
  • The initiative aims to protect the affordability of future water supplies.
  • LA County is collaborating with other regional agencies to improve stormwater capture infrastructure.
  • Regular sediment removal from reservoirs and operational adjustments based on weather forecasts are part of the strategy.

Context

This initiative aligns with broader efforts to manage water resources effectively in a region that faces challenges related to climate change and water scarcity.

What happens next

LA County will continue to implement strategies to capture and manage stormwater, enhancing infrastructure and collaboration with regional agencies to ensure a sustainable water supply.

What we don't know yet

Details regarding specific investments made and the exact methods used for capturing stormwater have not been confirmed.