Contains results of weekly water samples collected at beaches in Marin County, CA. The weekly samples are collected and analyzed for Total Coliform, E. coli, and Enterococcus bacteria. Advisories are posted at a beach when a recreational standard for these indicator organism is exceeded.

Weekly results are published each year starting in April and continuing through October. Sample results in this dataset start with the week of May 29, 2017.

If a sample result is labeled "N/A" it means that no results are available from the beach location that week.

Marin Friendly Garden Walks performed by Master Gardeners on Marin County residential properties that are connected to the Marin Municipal Water District (MMWD). The specialized and free walks by the knowledgeable and trained Master Gardeners focus on the many ways a homeowner can save water through improved garden landscaping choices, and improved water irrigation and conservation practices. A written report is provided to each homeowner. The program is administered by the University of California Cooperative Extension (UCCE). It is funded by various entities including Marin County and MMWD. Data is updated quarterly and begins in 2008.