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Water Watch

Clear water wave

Water Watch

About 75% of the District's water supply originates from rainfall on our Mt. Tamalpais watershed and in the grassy hills of west Marin, flowing into the District’s seven reservoirs. 

The District also supplements its supply with water from the Sonoma County Water Agency (SCWA), which comes from the Russian River system in Sonoma County. The Russian River water supply originates from rainfall that flows into Lake Sonoma and Lake Mendocino.

Learn more about our water supply, reservoir levels, and recent rainfall in the tables below. 

Water Production

Week Ending Average Million
Gallons Per Day
10/03/2022 21.88
Same Week in 2021 21.14
Supply Source:  
          Reservoirs 18.73
          Same Week in 2021 16.79
          Russian River 3.15
          Same Week in 2021 4.35

Rainfall

Rainfall at Lake Lagunitas (average annual rainfall is 52.65 inches) Inches
7/01/2022 - 10/03/2022 1.49
Same period last year 0.11
Average year-to-date 0.94
Rainfall for last 24 hours 0.00

For daily rainfall totals for this fiscal year to date, please refer to Rainfall & Reservoir Data - Current Fiscal Year.

Current rainfall (1.49 inches) is 158.51% of the average rainfall (0.94 inches) for this date.

Reservoir Storage

Alpine, Bon Tempe, Kent, Lagunitas, Nicasio, Phoenix & Soulajule Reservoirs
(total capacity 79,566 acre-feet)
Acre-feet % of Capacity
Storage as of 10/03/2022 58,474 73.49%
Storage for this date last year 27,015 33.95%
Average storage for this date 54,498 68.49%

Current storage (58,474 AF) is 107.30% of the average storage (54,498 AF) for this date.