Lower Crystal Springs Reservoir near San Mateo water level

Name: Lower Crystal Springs Reservoir near San Mateo water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

Reservoir, Lower Crystal Springs Reservoir, California, United States

Directions

Latest reading

Surface elevation

272.09ft Steady over the last 24 hours

Measured Oct 20, 2026, 10:30 AM PDT (47 min ago)

History

7 days

Surface elevation

What this means

The latest lake level at Lower Crystal Springs Reservoir near San Mateo is 272.09 ft. The agency publishes no normal range or warning level for this reservoir yet, so there is nothing to judge the number against.

The level has held steady over the past 24 hours. Over the past 30 days it has moved between 271.91 ft and 272.10 ft.

The agency publishes no normal range for this gauge yet, so we show the trend only. How to read levels

Swimming and boating at Lower Crystal Springs Reservoir near San Mateo

Without a published normal range, the trend is the most useful thing here: a steady lake means few changes at the shore.

If you swim, pick a spot with an easy way out, and remember that drop-offs move as the level changes.

Weather at the gauge

No rain in the last 3 days.

18 Sun 69° 53° – Wind 13 mph

19 Mon 63° 51° – Wind 10 mph

20 Tue 67° 51° – Wind 4 mph

21 Wed 67° 57° 0.46 in, 52% Wind 12 mph

22 Thu 68° 58° – Wind 8 mph

23 Fri 68° 56° – Wind 6 mph

24 Sat 73° 58° – Wind 4 mph

Forecast: Open-Meteo

Sunrise 07:23 AM Sunset 06:27 PM Daylight 11 hr, 4 min Waxing gibbous 70%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
San Mateo Creek below Lo Crystal Sp Reservoir near San MateoRiver gauge, San Mateo Creek	3.8 cfs	Normal	±0	1.0 mi
Pilarcitos Creek below Stone Dam near HillsboroughRiver gauge, Pilarcitos Creek	1.4 cfs	Normal	−0.1 cfs	2.5 mi
Pilarcitos Creek above Stone Dam near HillsboroughRiver gauge, Pilarcitos Creek	3.5 cfs	Normal	+0.1 cfs	2.6 mi
Pilarcitos Creek below Spillway near HillsboroughRiver gauge, Pilarcitos Creek	2.8 cfs	Normal	+0.1 cfs	4.2 mi
Pilarcitos Lake near HillsboroughLake, Pilarcitos Lake	679.68 ft	Below flood stage	−0.05 ft	4.3 mi
Pilarcitos C A Half Moon BayRiver gauge	2.76 ft	Below flood stage	±0	5.5 mi
San Francisquito C A Stanford UniversityRiver gauge	0.18 ft	Below flood stage	+0.01 ft	11 mi
San Francisco Bay A Old Dumbarton Branch near NewarkEstuary gauge, San Francisco Bay A Old Dumbarton Branch	6.75 ft	Very high	+0.52 ft	13 mi

Questions and answers

Is Lower Crystal Springs Reservoir near San Mateo really 272.09 ft deep?

No. 272.09 ft is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.

What is the water level of Lower Crystal Springs Reservoir near San Mateo today?

On Oct 20, 2026, 10:30 AM PDT, the surface elevation was 272.09 ft. Steady over the last 24 hours.

Is Lower Crystal Springs Reservoir near San Mateo rising or falling?

Steady over the last 24 hours.

Is the level of Lower Crystal Springs Reservoir near San Mateo normal?

The agency publishes no normal range for this gauge yet, so we show the trend only.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:11162750 (Agency page)
Coordinates: 37.51528, -122.35583 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Surface elevation	272.09 ft	2026-10-20 17:30	Provisional

Download

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How to cite

U.S. Geological Survey: Lower Crystal Springs Reservoir near San Mateo (usgs:11162750). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/california/lower-crystal-springs-reservoir-near-san-mateo

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer