Your Water
While many believe LA County is a desert, our region actually has a Mediterranean or semi‑arid climate—hot, dry summers followed by cool, wet winters. Because our climate swings between dry years and intense storm seasons, our region relies on an interconnected water system. More than 200 water agencies of all different sizes manage wastewater, stormwater and drinking water across our 4,083 square-mile metropolis. Together, they work to ensure our region has a safe, reliable and sustainable water system.
Where Our Water Comes From
LA County’s water comes from a mix of local groundwater, surface water, recycled water, and imported sources to ensure a reliable supply year‑round. This combination ensures we have enough water for the millions of people that live in our region.
Journey of Water
Water travels hundreds of miles from distant mountains, rivers, and reservoirs before reaching our taps. Along the way, it moves through aqueducts, pipelines, treatment plants, and local systems that work together to deliver safe, reliable water every day.
Water Quality
Your drinking water is consistently monitored and treated to meet some of the nation’s strictest health standards.
Pollution Prevention
Stormwater picks up all kinds of pollutants as it washes over surfaces like roofs, lawns, and parking lots. Simple everyday actions help prevent pollution and keep local waterways clean.
Flood Protection
LA County’s flood control system helps protect communities during major storms. These systems work year‑round to manage runoff safely.
Find Your Watershed
A watershed is the land area where water drains into a common outlet—like a river, lake, or the ocean. LA County has six major watersheds, each shaping local water quality and ecosystems.
Investing in Water
Water is an invaluable resource and keeping it reliable requires ongoing investment. Upgrading infrastructure and expanding local supplies helps secure our water future.
Storm Season Prep
Winter storms can bring heavy rain, flooding, and debris to neighborhoods across LA County. Preparing your home and property ahead of time helps reduce risks and keeps storm drains flowing.