Entities with Stormwater Responsibilities (e.g., Caltrans, Metro, industrial facilities)

Improve water quality facility operations and maintenance.

Water quality projects, like all other infrastructure, require proper operations and maintenance to help maximize long-term viability of the projects. Insufficient funding and maintenance procedures can decrease the effectiveness in delivering proper water quality benefits, as well as shorten the lifespan…

Increase public awareness of river water quality and watershed health.

There is a common misperception that the water in the LA River is always unclean in all locations. While all rivers are subject to sporadic events where water quality dips below normal, the majority of water in the river during…

Coordinate with the Watershed Management Program and Enhanced Watershed Management Program (WMP and EWMP) Groups.

There are four WMP or EWMP groups along the LA River that have adopted programs through which participating cities and agencies meet their water quality requirements. LA County will continue to coordinate with these groups to implement projects from these…

Coordinate water quality improvements with the Safe, Clean Water Program.

The Safe, Clean Water Program continues LA County’s tradition of protecting water quality within communities and providing new sources of water for current and future generations. Modernizing the 100-year-old water system can better protect public health and the environment, and…

Improve water quality and contribute to the attainment of water quality requirements to protect public and environmental health.

In addition to protecting public and environmental health, improved water quality in the LA River is important for the implementation of projects along the LA River corridor that seek to use water from within the channel. Water diverted from the LA…

Capture and treat stormwater and dry weather flows before they reach the river channel for groundwater recharge, direct use, water recycling, or release for downstream beneficial uses.

The primary sources of water flowing into the LA River are wet weather (stormwater) runoff originating from precipitation on the watershed and dry weather inputs from the watershed, including incidental urban runoff and groundwater upwelling. The dominant source of dry-weather flow…

Reduce peak flood flows into the river.

In addition to increasing capacity of the river, flood risk can also be improved by reducing the amount of water that enters the LA River at peak flows. Upstream storage or detention facilities, such as dams, help to store runoff during…

Entities with Stormwater Responsibilities (e.g., Caltrans, Metro, industrial facilities)

Improve water quality facility operations and maintenance.

Increase public awareness of river water quality and watershed health.

Coordinate with the Watershed Management Program and Enhanced Watershed Management Program (WMP and EWMP) Groups.

Coordinate water quality improvements with the Safe, Clean Water Program.

Improve water quality and contribute to the attainment of water quality requirements to protect public and environmental health.

Capture and treat stormwater and dry weather flows before they reach the river channel for groundwater recharge, direct use, water recycling, or release for downstream beneficial uses.

Reduce peak flood flows into the river.

English Version

Versión en español

Design Guidelines

Technical Volume