- Rainfall History Chart
- Rainfall & Reservoir Data Current Fiscal Year
- Rainfall & Reservoir Data 2021-22 Fiscal Year
- Rainfall & Reservoir Data 2020-21 Fiscal Year
- Rainfall & Reservoir Data 2019-20 Fiscal Year
- Rainfall & Reservoir Data 2018-19 Fiscal Year
- Rainfall & Reservoir Data 2017-18 Fiscal Year
- Rainfall & Reservoir Data 2016-17 Fiscal Year
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 |
|---|---|
| 5/31/2023 | 21.13 |
| Same Week in 2022 | 21.46 |
| Supply Source: | |
| Reservoirs | 10.88 |
| Same Week in 2022 | 9.55 |
| Russian River | 10.25 |
| Same Week in 2022 | 11.91 |
Rainfall
| Rainfall at Lake Lagunitas (average annual rainfall is 52.65 inches) | Inches |
|---|---|
| 7/01/2022 - 5/31/2023 | 76.94 |
| Same period last year | 48.94 |
| Average year-to-date | 51.84 |
| Rainfall for last 24 hours | 0.00 |
Summary: Current rainfall (76.94 inches) is 148.42% of the average rainfall (51.84 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 5/31/2023 | 78,153 | 98.22% |
| Storage for this date last year | 69,964 | 87.93% |
| Average storage for this date | 69,675 | 87.57% |
Summary: Current storage (78,153 AF) is 112.16% of the average storage (69,675 AF) for this date.
Reservoir Diversion Data
By Reservoir: