San Gabriel River Regional Monitoring Program
The San Gabriel River Regional Monitoring Program (SGRRMP) is a collaborative effort to assess the health of San Gabriel River watershed from a regional perspective. The motivation for this program came from the Los Angeles Regional Water Quality Control Board (Los Angeles Water Board or LARWQCB) using a unique permit condition for the Los Angeles County Sanitation District (LACSD) that initiated a monitoring program designed to increase awareness of issues at the watershed scale through the improved coordination and integration of monitoring efforts.

Since 2005, the SGRRMP has performed rigorous, scientific monitoring at targeted and randomly selected sites distributed throughout the watershed during dry weather including the mountainous upper watershed, the highly urbanized lower watershed and the cement-lined mainstem channel. The SGRRMP has successfully shown that an integrated watershed monitoring program can provide context to these essential management questions, while improving monitoring efficiencies.

With over 1,236 miles of streams stretching from the San Gabriel Mountains to the Pacific Ocean, the San Gabriel River Watershed supports a population of more than 2.3 million people. Protection and management ensuring sustainability of this resource requires an understanding of the watershed's overall health and the major stressors that affect its condition.
By providing a framework for monitoring at the watershed scale and working with stakeholders to establish a question-based monitoring approach, the SGRRMP aims to provide regional information specifically designed to answer the five key management questions:
  1. 1. What is the condition of streams in the watershed?
  2. 2. Are conditions at areas of unique interest getting better or worse?
  3. 3. Are receiving waters near discharges meeting water quality objectives?
  4. 4. Is it safe to swim?
  5. 5. Are locally caught fish safe to eat?
A specific monitoring design was established for each of these questions that included a set of parameters to be measured and an analysis approach to help managers answer these questions.