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Suscol Creek

Suscol Creek is a Napa River tributary slated for steelhead habitat restoration.

Location: 38.24110, -122.26716

Suscol Creek is -0.05 ft deep at the gage and 53.8 °F. Daily highs averaged 69.4 °F from Oct 20 through Oct 26, which is stressful for young steelhead.

Suscol Creek at Napa Sans

Water level

-0.05 ft

Steady

Reading

Water temperature

53.8 °F

Falling 1.6 °F in 24 h

Reading

For young steelhead

7-day average high

69.4 °F (Oct 20–26)

Stressful for young steelhead

The band rates the 7-day average of the daily high temperature, never a single reading. Biological thresholds from published research (EPA 2003 and others), not legal limits. About this data

Thresholds are pending scientific review.

Last reading

The latest water level reading is 12 hours old. The gage may be offline or waiting to upload.

This water year at a glance

Suscol Creek at Napa Sans

Days stressful

2 days

Oct 1–27

Days when the 7-day average daily high was above 60.8 °F and below 71.6 °F — stressful for young steelhead.

Days dangerous

24 days

Oct 1–27

Days when the 7-day average daily high was at or above 71.6 °F — dangerous for young steelhead.

Time in each band

Good 0% Stressful 8% Dangerous 92%

Each block of the bar is 5% of the rated days.

Oct 1–27

Of the days the bands could rate in this window, 0% were good for young steelhead, 8% were stressful, and 92% were dangerous. A day without enough readings to rate is in none of the three.

Hottest day

113.0 °F

On Oct 3, 2026

Oct 1–27

The highest daily maximum water temperature of the window. The steelhead bands rate the 7-day average of this value, never a single day.

Heat spikes

20 days with heat spikes

Oct 1–27

Days when a daily high temperature reached the acute limit for steelhead, 75.2 °F. A heat spike is one hot afternoon, not a week of them.

Lowest water level

-0.08 ft

On Oct 6, 2026

Oct 1–27

The lowest daily average water level of the window. It is depth at the sensor, not a surveyed river stage, so it compares with this gage's other days only.

Biggest 24-hour rise

0.04 ft

On Oct 13, 2026, peaking Oct 13, 2026, 3:00 AM PDT

Oct 1–27

The largest rise in water level over any 24 hours in the window — a storm-response indicator.

Data completeness

100%

26 of 26 days

Oct 1–27

Days with enough readings to count as complete, out of the days elapsed in the window so far.

Is the water cool enough for steelhead?

Over the last 90 days, the 7-day average daily high was in the stressful range on 2 days and in the dangerous range on 87 days.

Thresholds are pending scientific review.

Temperature bands for young steelhead

  • Good Good for young steelhead — at or below 60.8 °F
  • Stressful Stressful: slower growth, more disease — above 60.8 °F and below 71.6 °F
  • Dangerous Dangerous: can kill steelhead — at or above 71.6 °F
  • Federal recovery-plan limit — 68.0 °F

The bold line is the 7-day average of daily high temperatures, the measure the bands are based on. The thin line is the daily maximum: each day's high, including today's provisional "so far today" value. A biological band is never applied to the daily maximum.

Biological thresholds from published research (EPA 2003 and others), not legal limits. About this data

Show the data as a table
Daily ratings against the steelhead bands at Suscol Creek at Napa Sans, for the last 90 days.
Date Daily high 7-day average daily high Effective optimal limit Band
Jul 30, 2026 118.1 °F 117.6 °F 60.8 °F Dangerous
Jul 31, 2026 118.8 °F 117.7 °F 60.8 °F Dangerous
Aug 1, 2026 119.5 °F 117.7 °F 60.8 °F Dangerous
Aug 2, 2026 121.2 °F 118.5 °F 60.8 °F Dangerous
Aug 3, 2026 119.5 °F 119.0 °F 60.8 °F Dangerous
Aug 4, 2026 116.7 °F 118.8 °F 60.8 °F Dangerous
Aug 5, 2026 115.8 °F 118.5 °F 60.8 °F Dangerous
Aug 6, 2026 113.0 °F 117.8 °F 60.8 °F Dangerous
Aug 7, 2026 111.3 °F 116.7 °F 60.8 °F Dangerous
Aug 8, 2026 112.4 °F 115.7 °F 60.8 °F Dangerous
Aug 9, 2026 116.2 °F 115.0 °F 60.8 °F Dangerous
Aug 10, 2026 113.5 °F 114.1 °F 60.8 °F Dangerous
Aug 11, 2026 112.6 °F 113.5 °F 60.8 °F Dangerous
Aug 12, 2026 110.6 °F 112.8 °F 60.8 °F Dangerous
Aug 13, 2026 107.6 °F 112.0 °F 60.8 °F Dangerous
Aug 14, 2026 112.1 °F 112.1 °F 60.8 °F Dangerous
Aug 15, 2026 113.7 °F 112.3 °F 60.8 °F Dangerous
Aug 16, 2026 110.6 °F 111.5 °F 60.8 °F Dangerous
Aug 17, 2026 112.4 °F 111.4 °F 60.8 °F Dangerous
Aug 18, 2026 115.1 °F 111.7 °F 60.8 °F Dangerous
Aug 19, 2026 114.6 °F 112.3 °F 60.8 °F Dangerous
Aug 20, 2026 113.5 °F 113.1 °F 60.8 °F Dangerous
Aug 21, 2026 118.1 °F 114.0 °F 60.8 °F Dangerous
Aug 22, 2026 113.0 °F 113.9 °F 60.8 °F Dangerous
Aug 23, 2026 116.0 °F 114.7 °F 60.8 °F Dangerous
Aug 24, 2026 116.9 °F 115.3 °F 60.8 °F Dangerous
Aug 25, 2026 113.9 °F 115.2 °F 60.8 °F Dangerous
Aug 26, 2026 121.0 °F 116.1 °F 60.8 °F Dangerous
Aug 27, 2026 112.4 °F 115.9 °F 60.8 °F Dangerous
Aug 28, 2026 80.1 °F 110.5 °F 60.8 °F Dangerous
Aug 29, 2026 115.3 °F 110.8 °F 60.8 °F Dangerous
Aug 30, 2026 115.3 °F 110.7 °F 60.8 °F Dangerous
Aug 31, 2026 112.8 °F 110.1 °F 60.8 °F Dangerous
Sep 1, 2026 110.8 °F 109.7 °F 60.8 °F Dangerous
Sep 2, 2026 111.0 °F 108.2 °F 60.8 °F Dangerous
Sep 3, 2026 76.9 °F 103.2 °F 60.8 °F Dangerous
Sep 4, 2026 103.8 °F 106.6 °F 60.8 °F Dangerous
Sep 5, 2026 110.2 °F 105.8 °F 60.8 °F Dangerous
Sep 6, 2026 109.9 °F 105.1 °F 60.8 °F Dangerous
Sep 7, 2026 119.5 °F 106.0 °F 60.8 °F Dangerous
Sep 8, 2026 124.7 °F 108.0 °F 60.8 °F Dangerous
Sep 9, 2026 122.5 °F 109.7 °F 60.8 °F Dangerous
Sep 10, 2026 121.7 °F 116.1 °F 60.8 °F Dangerous
Sep 11, 2026 115.1 °F 117.7 °F 60.8 °F Dangerous
Sep 12, 2026 116.2 °F 118.5 °F 60.8 °F Dangerous
Sep 13, 2026 114.8 °F 119.2 °F 60.8 °F Dangerous
Sep 14, 2026 116.2 °F 118.8 °F 60.8 °F Dangerous
Sep 15, 2026 112.8 °F 117.1 °F 60.8 °F Dangerous
Sep 16, 2026 105.7 °F 114.7 °F 60.8 °F Dangerous
Sep 17, 2026 105.5 °F 112.3 °F 60.8 °F Dangerous
Sep 18, 2026 112.6 °F 112.0 °F 60.8 °F Dangerous
Sep 19, 2026 111.9 °F 111.4 °F 60.8 °F Dangerous
Sep 20, 2026 86.0 °F 107.2 °F 60.8 °F Dangerous
Sep 21, 2026 99.0 °F 104.8 °F 60.8 °F Dangerous
Sep 22, 2026 105.3 °F 103.7 °F 60.8 °F Dangerous
Sep 23, 2026 113.7 °F 104.8 °F 60.8 °F Dangerous
Sep 24, 2026 109.5 °F 105.4 °F 60.8 °F Dangerous
Sep 25, 2026 106.9 °F 104.6 °F 60.8 °F Dangerous
Sep 26, 2026 102.4 °F 103.3 °F 60.8 °F Dangerous
Sep 27, 2026 99.0 °F 105.1 °F 60.8 °F Dangerous
Sep 28, 2026 101.8 °F 105.5 °F 60.8 °F Dangerous
Sep 29, 2026 107.4 °F 105.8 °F 60.8 °F Dangerous
Sep 30, 2026 110.4 °F 105.3 °F 60.8 °F Dangerous
Oct 1, 2026 107.8 °F 105.1 °F 60.8 °F Dangerous
Oct 2, 2026 95.9 °F 103.5 °F 60.8 °F Dangerous
Oct 3, 2026 113.0 °F 105.0 °F 60.8 °F Dangerous
Oct 4, 2026 92.4 °F 104.1 °F 60.8 °F Dangerous
Oct 5, 2026 108.6 °F 105.1 °F 60.8 °F Dangerous
Oct 6, 2026 108.6 °F 105.3 °F 60.8 °F Dangerous
Oct 7, 2026 106.1 °F 104.6 °F 60.8 °F Dangerous
Oct 8, 2026 104.6 °F 104.2 °F 60.8 °F Dangerous
Oct 9, 2026 92.8 °F 103.8 °F 60.8 °F Dangerous
Oct 10, 2026 90.8 °F 100.6 °F 60.8 °F Dangerous
Oct 11, 2026 86.0 °F 99.7 °F 60.8 °F Dangerous
Oct 12, 2026 85.4 °F 96.3 °F 60.8 °F Dangerous
Oct 13, 2026 86.5 °F 93.2 °F 60.8 °F Dangerous
Oct 14, 2026 87.1 °F 90.5 °F 60.8 °F Dangerous
Oct 15, 2026 88.7 °F 88.2 °F 60.8 °F Dangerous
Oct 16, 2026 90.0 °F 87.8 °F 60.8 °F Dangerous
Oct 17, 2026 90.2 °F 87.7 °F 60.8 °F Dangerous
Oct 18, 2026 81.1 °F 87.0 °F 60.8 °F Dangerous
Oct 19, 2026 76.9 °F 85.8 °F 60.8 °F Dangerous
Oct 20, 2026 76.4 °F 84.4 °F 60.8 °F Dangerous
Oct 21, 2026 68.8 °F 81.7 °F 60.8 °F Dangerous
Oct 22, 2026 64.2 °F 78.2 °F 60.8 °F Dangerous
Oct 23, 2026 67.4 °F 75.0 °F 60.8 °F Dangerous
Oct 24, 2026 69.3 °F 72.0 °F 60.8 °F Dangerous
Oct 25, 2026 69.7 °F 70.4 °F 60.8 °F Stressful
Oct 26, 2026 70.0 °F 69.4 °F 60.8 °F Stressful
Oct 27, 2026 (so far today) 66.1 °F — 60.8 °F No rating yet (so far today)

Is the water healthy for steelhead?

Dissolved oxygen: data not available.

pH: data not available.

Turbidity: data not available.

Daily highs and lows

Over the last 90 days, water temperature swung an average of 43.1 °F between night and day.

Show the data as a table
Daily low, average, high, and swing at Suscol Creek at Napa Sans — the last 14 days of the selected measurement data.
Date Water temperature Water level Data
Min Mean Max Swing Min Mean Max Swing
Oct 14, 2026 52.6 °F 64.8 °F 87.1 °F 34.5 °F -0.08 ft -0.07 ft -0.06 ft 0.02 ft
Oct 15, 2026 53.8 °F 66.6 °F 88.7 °F 34.9 °F -0.08 ft -0.07 ft -0.06 ft 0.02 ft
Oct 16, 2026 54.3 °F 67.8 °F 90.0 °F 35.7 °F -0.08 ft -0.07 ft -0.06 ft 0.02 ft
Oct 17, 2026 56.3 °F 68.4 °F 90.2 °F 33.9 °F -0.08 ft -0.07 ft -0.06 ft 0.02 ft
Oct 18, 2026 55.2 °F 64.6 °F 81.1 °F 25.9 °F -0.07 ft -0.07 ft -0.06 ft 0.02 ft
Oct 19, 2026 58.7 °F 63.5 °F 76.9 °F 18.3 °F -0.08 ft -0.07 ft -0.06 ft 0.01 ft
Oct 20, 2026 52.8 °F 62.0 °F 76.4 °F 23.6 °F -0.08 ft -0.07 ft -0.06 ft 0.02 ft
Oct 21, 2026 57.0 °F 61.7 °F 68.8 °F 11.9 °F -0.08 ft -0.07 ft -0.07 ft 0.02 ft
Oct 22, 2026 58.5 °F 60.3 °F 64.2 °F 5.7 °F -0.08 ft -0.07 ft -0.07 ft 0.01 ft
Oct 23, 2026 55.6 °F 60.1 °F 67.4 °F 11.9 °F -0.08 ft -0.07 ft -0.06 ft 0.01 ft
Oct 24, 2026 50.5 °F 57.9 °F 69.3 °F 18.8 °F -0.08 ft -0.07 ft -0.06 ft 0.02 ft
Oct 25, 2026 49.6 °F 58.0 °F 69.7 °F 20.1 °F -0.08 ft -0.07 ft -0.05 ft 0.03 ft
Oct 26, 2026 50.3 °F 57.4 °F 70.0 °F 19.7 °F -0.08 ft -0.07 ft -0.06 ft 0.02 ft
Oct 27, 2026 47.6 °F 55.0 °F 66.1 °F 18.4 °F -0.08 ft -0.06 ft -0.05 ft 0.03 ft So far today: 47 of 48 readings so far

Water level and temperature over time

Over the last 7 days, water level ranged from -0.08 ft to -0.05 ft and temperature from 47.6 °F to 70.0 °F.

Raw readings are in Recent readings and downloads.

Show the data as a table
Daily minimum, average, and maximum for the last 7 days at Suscol Creek at Napa Sans.
Date Water level Water temperature
Min Mean Max Min Mean Max
Oct 21, 2026 -0.08 ft -0.07 ft -0.07 ft 57.0 °F 61.7 °F 68.8 °F
Oct 22, 2026 -0.08 ft -0.07 ft -0.07 ft 58.5 °F 60.3 °F 64.2 °F
Oct 23, 2026 -0.08 ft -0.07 ft -0.06 ft 55.6 °F 60.1 °F 67.4 °F
Oct 24, 2026 -0.08 ft -0.07 ft -0.06 ft 50.5 °F 57.9 °F 69.3 °F
Oct 25, 2026 -0.08 ft -0.07 ft -0.05 ft 49.6 °F 58.0 °F 69.7 °F
Oct 26, 2026 -0.08 ft -0.07 ft -0.06 ft 50.3 °F 57.4 °F 70.0 °F
Oct 27, 2026 (so far today) -0.08 ft -0.06 ft -0.05 ft 47.6 °F 55.0 °F 66.1 °F

Every day at a glance

Suscol Creek at Napa Sans

In the last 12 months, the 7-day average daily high was above 68.0 °F on 225 complete days, mostly in May 2026, Jul 2026, and Aug 2026.

Show the monthly summaries for water year 2027
At Suscol Creek at Napa Sans, month by month in water year 2027: how many days fell in each steelhead band, and the month's averages. Means use days that ended; a day without enough readings is in no band.
Month Good days Stressful days Dangerous days Mean 7-day average daily high (°F) Mean daily high (°F) Mean water level (ft)
Oct 2026 0 2 24 91.9 °F 87.6 °F -0.07 ft
Show every day of water year 2027 as a table
At Suscol Creek at Napa Sans, every day of water year 2027, the calendar's own rows: the 7-day average daily high the bands are based on, the band in words, and — labeled separately — that day's maximum temperature and average water level.
Date 7-day average daily high (°F) Band Daily high (°F) Daily mean water level (ft)
Oct 1, 2026 105.1 °F Dangerous 107.8 °F -0.08 ft
Oct 2, 2026 103.5 °F Dangerous 95.9 °F -0.08 ft
Oct 3, 2026 105.0 °F Dangerous 113.0 °F -0.08 ft
Oct 4, 2026 104.1 °F Dangerous 92.4 °F -0.08 ft
Oct 5, 2026 105.1 °F Dangerous 108.6 °F -0.08 ft
Oct 6, 2026 105.3 °F Dangerous 108.6 °F -0.08 ft
Oct 7, 2026 104.6 °F Dangerous 106.1 °F -0.08 ft
Oct 8, 2026 104.2 °F Dangerous 104.6 °F -0.08 ft
Oct 9, 2026 103.8 °F Dangerous 92.8 °F -0.08 ft
Oct 10, 2026 100.6 °F Dangerous 90.8 °F -0.08 ft
Oct 11, 2026 99.7 °F Dangerous 86.0 °F -0.07 ft
Oct 12, 2026 96.3 °F Dangerous 85.4 °F -0.07 ft
Oct 13, 2026 93.2 °F Dangerous 86.5 °F -0.07 ft
Oct 14, 2026 90.5 °F Dangerous 87.1 °F -0.07 ft
Oct 15, 2026 88.2 °F Dangerous 88.7 °F -0.07 ft
Oct 16, 2026 87.8 °F Dangerous 90.0 °F -0.07 ft
Oct 17, 2026 87.7 °F Dangerous 90.2 °F -0.07 ft
Oct 18, 2026 87.0 °F Dangerous 81.1 °F -0.07 ft
Oct 19, 2026 85.8 °F Dangerous 76.9 °F -0.07 ft
Oct 20, 2026 84.4 °F Dangerous 76.4 °F -0.07 ft
Oct 21, 2026 81.7 °F Dangerous 68.8 °F -0.07 ft
Oct 22, 2026 78.2 °F Dangerous 64.2 °F -0.07 ft
Oct 23, 2026 75.0 °F Dangerous 67.4 °F -0.07 ft
Oct 24, 2026 72.0 °F Dangerous 69.3 °F -0.07 ft
Oct 25, 2026 70.4 °F Stressful 69.7 °F -0.07 ft
Oct 26, 2026 69.4 °F Stressful 70.0 °F -0.07 ft
Oct 27, 2026 (so far today) — No rating yet (so far today) 66.1 °F -0.06 ft

The calendar colors by 7-day average daily high (7DADM)

  • Good Good for young steelhead
  • Stressful Stressful: slower growth, more disease
  • Dangerous Dangerous: can kill steelhead
  • Not enough data The day had too few readings for a 7-day average to be complete, so it is in no band.
  • Federal recovery-plan limit — 68.0 °F
  • Daily water level; darker blue is deeper. Levels are continuous, so they carry no band.

7DADM is the mean of the daily maximum water temperature over seven consecutive complete local days. The tables above also print each day's maximum, labeled as its own statistic: a biological band is never applied to it (Issue #13).

Biological thresholds from published research (EPA 2003 and others), not legal limits. About this data

Thresholds are pending scientific review.

The calendar's own days, in words: the tables above are the same data. For the raw readings, see Recent readings and downloads.

This year compared with past years

Water level on Oct 27, 2026 was -0.06 ft, lower than on that date in 1 of 1 prior years.

Show the data as a table
Daily average water level at Suscol Creek at Napa Sans on the same calendar day in every water year of the record: WY2027 (this year), WY2026. A dash is a day with no reading in that year, never a zero.
Day of water year WY2027 (this year) WY2026
Oct 1 -0.08 ft —
Oct 2 -0.08 ft —
Oct 3 -0.08 ft —
Oct 4 -0.08 ft —
Oct 5 -0.08 ft —
Oct 6 -0.08 ft -0.07 ft
Oct 7 -0.08 ft -0.07 ft
Oct 8 -0.08 ft -0.07 ft
Oct 9 -0.08 ft -0.07 ft
Oct 10 -0.08 ft -0.06 ft
Oct 11 -0.07 ft -0.07 ft
Oct 12 -0.07 ft -0.06 ft
Oct 13 -0.07 ft -0.06 ft
Oct 14 -0.07 ft -0.06 ft
Oct 15 -0.07 ft -0.06 ft
Oct 16 -0.07 ft -0.05 ft
Oct 17 -0.07 ft -0.05 ft
Oct 18 -0.07 ft -0.05 ft
Oct 19 -0.07 ft -0.05 ft
Oct 20 -0.07 ft -0.05 ft
Oct 21 -0.07 ft -0.05 ft
Oct 22 -0.07 ft -0.05 ft
Oct 23 -0.07 ft -0.05 ft
Oct 24 -0.07 ft -0.05 ft
Oct 25 -0.07 ft -0.05 ft
Oct 26 -0.07 ft -0.05 ft
Oct 27 -0.06 ft -0.05 ft
Oct 28 — -0.04 ft
Oct 29 — -0.04 ft
Oct 30 — -0.04 ft
Oct 31 — -0.04 ft
Nov 1 — -0.04 ft
Nov 2 — -0.04 ft
Nov 3 — -0.04 ft
Nov 4 — -0.04 ft
Nov 5 — -0.05 ft
Nov 6 — -0.05 ft
Nov 7 — -0.04 ft
Nov 8 — -0.04 ft
Nov 9 — -0.04 ft
Nov 10 — -0.04 ft
Nov 11 — -0.04 ft
Nov 12 — -0.04 ft
Nov 13 — -0.04 ft
Nov 14 — -0.04 ft
Nov 15 — -0.04 ft
Nov 16 — -0.04 ft
Nov 17 — -0.04 ft
Nov 18 — -0.03 ft
Nov 19 — -0.03 ft
Nov 20 — -0.03 ft
Nov 21 — -0.03 ft
Nov 22 — -0.03 ft
Nov 23 — -0.02 ft
Nov 24 — -0.02 ft
Nov 25 — -0.02 ft
Nov 26 — -0.02 ft
Nov 27 — -0.01 ft
Nov 28 — -0.01 ft
Nov 29 — -0.01 ft
Nov 30 — -0.01 ft
Dec 1 — -0.01 ft
Dec 2 — -0.01 ft
Dec 3 — -0.01 ft
Dec 4 — -0.01 ft
Dec 5 — -0.01 ft
Dec 6 — -0.01 ft
Dec 7 — -0.01 ft
Dec 8 — -0.01 ft
Dec 9 — -0.01 ft
Dec 10 — -0.01 ft
Dec 11 — 0.00 ft
Dec 12 — 0.00 ft
Dec 13 — 0.00 ft
Dec 14 — 0.00 ft
Dec 15 — 0.00 ft
Dec 16 — 0.00 ft
Dec 17 — 0.00 ft
Dec 18 — -0.01 ft
Dec 19 — -0.01 ft
Dec 20 — -0.01 ft
Dec 21 — 0.01 ft
Dec 22 — 1.07 ft
Dec 23 — 0.66 ft
Dec 24 — 0.72 ft
Dec 25 — 1.44 ft
Dec 26 — 1.39 ft
Dec 27 — 0.90 ft
Dec 28 — 0.63 ft
Dec 29 — 0.50 ft
Dec 30 — 0.42 ft
Dec 31 — 0.39 ft
Jan 1 — 0.64 ft
Jan 2 — 0.75 ft
Jan 3 — 0.91 ft
Jan 4 — 1.36 ft
Jan 5 — 1.32 ft
Jan 6 — 1.21 ft
Jan 7 — 0.82 ft
Jan 8 — 0.59 ft
Jan 9 — 0.47 ft
Jan 10 — 0.42 ft
Jan 11 — 0.37 ft
Jan 12 — 0.32 ft
Jan 13 — 0.28 ft
Jan 14 — 0.25 ft
Jan 15 — 0.21 ft
Jan 16 — 0.19 ft
Jan 17 — 0.16 ft
Jan 18 — 0.14 ft
Jan 19 — 0.12 ft
Jan 20 — 0.09 ft
Jan 21 — 0.07 ft
Jan 22 — 0.07 ft
Jan 23 — 0.06 ft
Jan 24 — 0.05 ft
Jan 25 — 0.05 ft
Jan 26 — 0.05 ft
Jan 27 — 0.05 ft
Jan 28 — 0.05 ft
Jan 29 — 0.06 ft
Jan 30 — 0.06 ft
Jan 31 — 0.06 ft
Feb 1 — 0.05 ft
Feb 2 — 0.04 ft
Feb 3 — 0.03 ft
Feb 4 — 0.03 ft
Feb 5 — 0.04 ft
Feb 6 — 0.05 ft
Feb 7 — 0.04 ft
Feb 8 — 0.04 ft
Feb 9 — 0.05 ft
Feb 10 — 0.05 ft
Feb 11 — 0.06 ft
Feb 12 — 0.01 ft
Feb 13 — 0.00 ft
Feb 14 — 0.01 ft
Feb 15 — 0.00 ft
Feb 16 — 0.23 ft
Feb 17 — 0.63 ft
Feb 18 — 0.70 ft
Feb 19 — 1.14 ft
Feb 20 — 0.76 ft
Feb 21 — 0.51 ft
Feb 22 — 0.39 ft
Feb 23 — 0.31 ft
Feb 24 — 0.25 ft
Feb 25 — 0.38 ft
Feb 26 — 0.33 ft
Feb 27 — 0.28 ft
Feb 28 — 0.23 ft
Mar 1 — 0.19 ft
Mar 2 — 0.16 ft
Mar 3 — 0.13 ft
Mar 4 — 0.10 ft
Mar 5 — 0.07 ft
Mar 6 — 0.05 ft
Mar 7 — 0.04 ft
Mar 8 — 0.05 ft
Mar 9 — 0.04 ft
Mar 10 — 0.03 ft
Mar 11 — 0.03 ft
Mar 12 — 0.02 ft
Mar 13 — 0.02 ft
Mar 14 — 0.02 ft
Mar 15 — 0.01 ft
Mar 16 — 0.01 ft
Mar 17 — 0.01 ft
Mar 18 — 0.00 ft
Mar 19 — -0.01 ft
Mar 20 — 0.00 ft
Mar 21 — 0.00 ft
Mar 22 — 0.00 ft
Mar 23 — -0.01 ft
Mar 24 — -0.02 ft
Mar 25 — -0.03 ft
Mar 26 — -0.03 ft
Mar 27 — -0.01 ft
Mar 28 — -0.01 ft
Mar 29 — -0.01 ft
Mar 30 — -0.01 ft
Mar 31 — -0.02 ft
Apr 1 — -0.01 ft
Apr 2 — -0.02 ft
Apr 3 — -0.02 ft
Apr 4 — -0.06 ft
Apr 5 — -0.05 ft
Apr 6 — -0.05 ft
Apr 7 — -0.06 ft
Apr 8 — -0.07 ft
Apr 9 — -0.06 ft
Apr 10 — -0.06 ft
Apr 11 — -0.07 ft
Apr 12 — -0.09 ft
Apr 13 — -0.07 ft
Apr 14 — -0.06 ft
Apr 15 — -0.06 ft
Apr 16 — -0.06 ft
Apr 17 — -0.05 ft
Apr 18 — -0.04 ft
Apr 19 — -0.04 ft
Apr 20 — -0.04 ft
Apr 21 — -0.05 ft
Apr 22 — 0.03 ft
Apr 23 — 0.20 ft
Apr 24 — 0.18 ft
Apr 25 — 0.15 ft
Apr 26 — 0.12 ft
Apr 27 — 0.08 ft
Apr 28 — 0.04 ft
Apr 29 — 0.03 ft
Apr 30 — 0.01 ft
May 1 — 0.01 ft
May 2 — 0.02 ft
May 3 — 0.02 ft
May 4 — 0.00 ft
May 5 — -0.01 ft
May 6 — 0.00 ft
May 7 — -0.01 ft
May 8 — -0.01 ft
May 9 — -0.01 ft
May 10 — 0.00 ft
May 11 — 0.00 ft
May 12 — -0.01 ft
May 13 — -0.01 ft
May 14 — 0.00 ft
May 15 — 0.00 ft
May 16 — -0.01 ft
May 17 — 0.01 ft
May 18 — 0.03 ft
May 19 — 0.05 ft
May 20 — 0.06 ft
May 21 — 0.07 ft
May 22 — 0.06 ft
May 23 — 0.04 ft
May 24 — 0.03 ft
May 25 — 0.03 ft
May 26 — 0.03 ft
May 27 — 0.02 ft
May 28 — -0.01 ft
May 29 — 0.00 ft
May 30 — -0.02 ft
May 31 — -0.03 ft
Jun 1 — -0.04 ft
Jun 2 — -0.05 ft
Jun 3 — -0.05 ft
Jun 4 — -0.05 ft
Jun 5 — -0.06 ft
Jun 6 — -0.06 ft
Jun 7 — -0.07 ft
Jun 8 — -0.06 ft
Jun 9 — -0.06 ft
Jun 10 — -0.06 ft
Jun 11 — -0.06 ft
Jun 12 — -0.06 ft
Jun 13 — -0.06 ft
Jun 14 — -0.06 ft
Jun 15 — -0.06 ft
Jun 16 — -0.06 ft
Jun 17 — -0.07 ft
Jun 18 — -0.07 ft
Jun 19 — -0.07 ft
Jun 20 — -0.06 ft
Jun 21 — -0.07 ft
Jun 22 — -0.07 ft
Jun 23 — -0.07 ft
Jun 24 — -0.08 ft
Jun 25 — -0.07 ft
Jun 26 — -0.07 ft
Jun 27 — -0.07 ft
Jun 28 — -0.07 ft
Jun 29 — -0.07 ft
Jun 30 — -0.07 ft
Jul 1 — -0.08 ft
Jul 2 — -0.07 ft
Jul 3 — -0.07 ft
Jul 4 — -0.07 ft
Jul 5 — -0.08 ft
Jul 6 — -0.08 ft
Jul 7 — -0.07 ft
Jul 8 — -0.08 ft
Jul 9 — -0.08 ft
Jul 10 — -0.08 ft
Jul 11 — -0.08 ft
Jul 12 — -0.08 ft
Jul 13 — -0.08 ft
Jul 14 — -0.08 ft
Jul 15 — -0.09 ft
Jul 16 — -0.08 ft
Jul 17 — -0.09 ft
Jul 18 — -0.08 ft
Jul 19 — -0.08 ft
Jul 20 — -0.09 ft
Jul 21 — -0.09 ft
Jul 22 — -0.09 ft
Jul 23 — -0.09 ft
Jul 24 — -0.08 ft
Jul 25 — -0.08 ft
Jul 26 — -0.08 ft
Jul 27 — -0.08 ft
Jul 28 — -0.08 ft
Jul 29 — -0.08 ft
Jul 30 — -0.08 ft
Jul 31 — -0.08 ft
Aug 1 — -0.09 ft
Aug 2 — -0.09 ft
Aug 3 — -0.09 ft
Aug 4 — -0.09 ft
Aug 5 — -0.09 ft
Aug 6 — -0.09 ft
Aug 7 — -0.09 ft
Aug 8 — -0.09 ft
Aug 9 — -0.09 ft
Aug 10 — -0.09 ft
Aug 11 — -0.08 ft
Aug 12 — -0.08 ft
Aug 13 — -0.08 ft
Aug 14 — -0.08 ft
Aug 15 — -0.09 ft
Aug 16 — -0.09 ft
Aug 17 — -0.09 ft
Aug 18 — -0.09 ft
Aug 19 — -0.09 ft
Aug 20 — -0.08 ft
Aug 21 — -0.09 ft
Aug 22 — -0.09 ft
Aug 23 — -0.08 ft
Aug 24 — -0.08 ft
Aug 25 — -0.08 ft
Aug 26 — -0.08 ft
Aug 27 — -0.08 ft
Aug 28 — -0.08 ft
Aug 29 — -0.08 ft
Aug 30 — -0.08 ft
Aug 31 — -0.09 ft
Sep 1 — -0.09 ft
Sep 2 — -0.08 ft
Sep 3 — -0.08 ft
Sep 4 — -0.08 ft
Sep 5 — -0.08 ft
Sep 6 — -0.08 ft
Sep 7 — -0.08 ft
Sep 8 — -0.09 ft
Sep 9 — -0.09 ft
Sep 10 — -0.09 ft
Sep 11 — -0.09 ft
Sep 12 — -0.09 ft
Sep 13 — -0.08 ft
Sep 14 — -0.08 ft
Sep 15 — -0.09 ft
Sep 16 — -0.09 ft
Sep 17 — -0.08 ft
Sep 18 — -0.08 ft
Sep 19 — -0.08 ft
Sep 20 — -0.08 ft
Sep 21 — -0.08 ft
Sep 22 — -0.08 ft
Sep 23 — -0.08 ft
Sep 24 — -0.09 ft
Sep 25 — -0.08 ft
Sep 26 — -0.08 ft
Sep 27 — -0.08 ft
Sep 28 — -0.07 ft
Sep 29 — -0.08 ft
Sep 30 — -0.08 ft

Other years' days are in the tables above; the chart draws them thin and gray and this year bold, one line per gage. For the raw readings, see Recent readings and downloads.

Where the gage is

Location not yet available

The gages

  • Suscol Creek at Napa Sans Location not yet available

The creek

Stream map coming soon — the stream's course has not been added yet.

Recent readings and downloads

120 readings, oldest first. Sorting and paging need JavaScript; every row is already here.

Every recent reading from Suscol Creek at Napa Sans. Times are gage-local (Pacific time) and UTC; values are in the units named in each heading.
Local time UTC time Gage Water level (ft) Water temperature (°F)
2026-10-25T18:30:00Z Suscol Creek at Napa Sans -0.07 ft —
2026-10-25T19:00:00Z Suscol Creek at Napa Sans -0.07 ft —
2026-10-25T19:30:00Z Suscol Creek at Napa Sans -0.07 ft —
2026-10-25T20:00:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-25T20:30:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-25T21:00:00Z Suscol Creek at Napa Sans -0.07 ft —
2026-10-25T21:30:00Z Suscol Creek at Napa Sans -0.07 ft —
2026-10-25T22:00:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-25T22:30:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-25T23:00:00Z Suscol Creek at Napa Sans -0.07 ft —
2026-10-25T23:30:00Z Suscol Creek at Napa Sans -0.07 ft —
2026-10-26T00:00:00Z Suscol Creek at Napa Sans -0.07 ft —
2026-10-26T00:30:00Z Suscol Creek at Napa Sans -0.07 ft —
2026-10-26T01:00:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-26T01:30:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-26T02:00:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-26T02:30:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-26T03:00:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-26T03:30:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-26T04:00:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-26T04:30:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-26T05:00:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-26T05:30:00Z Suscol Creek at Napa Sans -0.07 ft —
2026-10-26T06:00:00Z Suscol Creek at Napa Sans -0.08 ft —
2026-10-26T06:30:00Z Suscol Creek at Napa Sans -0.07 ft 57.0 °F
2026-10-26T07:00:00Z Suscol Creek at Napa Sans -0.07 ft 56.3 °F
2026-10-26T07:30:00Z Suscol Creek at Napa Sans -0.06 ft 55.7 °F
2026-10-26T08:00:00Z Suscol Creek at Napa Sans -0.07 ft 55.2 °F
2026-10-26T08:30:00Z Suscol Creek at Napa Sans -0.06 ft 54.5 °F
2026-10-26T09:00:00Z Suscol Creek at Napa Sans -0.08 ft 54.0 °F
2026-10-26T09:30:00Z Suscol Creek at Napa Sans -0.07 ft 53.5 °F
2026-10-26T10:00:00Z Suscol Creek at Napa Sans -0.07 ft 53.1 °F
2026-10-26T10:30:00Z Suscol Creek at Napa Sans -0.06 ft 52.6 °F
2026-10-26T11:00:00Z Suscol Creek at Napa Sans -0.06 ft 52.4 °F
2026-10-26T11:30:00Z Suscol Creek at Napa Sans -0.06 ft 52.1 °F
2026-10-26T12:00:00Z Suscol Creek at Napa Sans -0.06 ft 51.9 °F
2026-10-26T12:30:00Z Suscol Creek at Napa Sans -0.07 ft 51.7 °F
2026-10-26T13:00:00Z Suscol Creek at Napa Sans -0.06 ft 51.5 °F
2026-10-26T13:30:00Z Suscol Creek at Napa Sans -0.06 ft 51.2 °F
2026-10-26T14:00:00Z Suscol Creek at Napa Sans -0.06 ft 51.0 °F
2026-10-26T14:30:00Z Suscol Creek at Napa Sans -0.06 ft 50.7 °F
2026-10-26T15:00:00Z Suscol Creek at Napa Sans -0.06 ft 50.3 °F
2026-10-26T15:30:00Z Suscol Creek at Napa Sans -0.06 ft 50.3 °F
2026-10-26T16:00:00Z Suscol Creek at Napa Sans -0.06 ft 50.5 °F
2026-10-26T16:30:00Z Suscol Creek at Napa Sans -0.06 ft 51.4 °F
2026-10-26T17:00:00Z Suscol Creek at Napa Sans -0.07 ft 57.3 °F
2026-10-26T17:30:00Z Suscol Creek at Napa Sans -0.07 ft 56.4 °F
2026-10-26T18:00:00Z Suscol Creek at Napa Sans -0.07 ft 56.8 °F
2026-10-26T18:30:00Z Suscol Creek at Napa Sans -0.07 ft 57.0 °F
2026-10-26T19:00:00Z Suscol Creek at Napa Sans -0.07 ft 56.8 °F
2026-10-26T19:30:00Z Suscol Creek at Napa Sans -0.07 ft 58.0 °F
2026-10-26T20:00:00Z Suscol Creek at Napa Sans -0.07 ft 64.0 °F
2026-10-26T20:30:00Z Suscol Creek at Napa Sans -0.07 ft 65.7 °F
2026-10-26T21:00:00Z Suscol Creek at Napa Sans -0.07 ft 64.5 °F
2026-10-26T21:30:00Z Suscol Creek at Napa Sans -0.06 ft 64.2 °F
2026-10-26T22:00:00Z Suscol Creek at Napa Sans -0.07 ft 64.9 °F
2026-10-26T22:30:00Z Suscol Creek at Napa Sans -0.07 ft 65.5 °F
2026-10-26T23:00:00Z Suscol Creek at Napa Sans -0.07 ft 70.0 °F
2026-10-26T23:30:00Z Suscol Creek at Napa Sans -0.07 ft 68.6 °F
2026-10-27T00:00:00Z Suscol Creek at Napa Sans -0.07 ft 67.3 °F
2026-10-27T00:30:00Z Suscol Creek at Napa Sans -0.07 ft 65.7 °F
2026-10-27T01:00:00Z Suscol Creek at Napa Sans -0.07 ft 64.3 °F
2026-10-27T01:30:00Z Suscol Creek at Napa Sans -0.07 ft 62.8 °F
2026-10-27T02:00:00Z Suscol Creek at Napa Sans -0.07 ft 61.4 °F
2026-10-27T02:30:00Z Suscol Creek at Napa Sans -0.07 ft 60.4 °F
2026-10-27T03:00:00Z Suscol Creek at Napa Sans -0.07 ft 59.4 °F
2026-10-27T03:30:00Z Suscol Creek at Napa Sans -0.07 ft 58.5 °F
2026-10-27T04:00:00Z Suscol Creek at Napa Sans -0.07 ft 57.8 °F
2026-10-27T04:30:00Z Suscol Creek at Napa Sans -0.07 ft 57.1 °F
2026-10-27T05:00:00Z Suscol Creek at Napa Sans -0.06 ft 56.4 °F
2026-10-27T05:30:00Z Suscol Creek at Napa Sans -0.07 ft 55.9 °F
2026-10-27T06:00:00Z Suscol Creek at Napa Sans -0.06 ft 55.4 °F
2026-10-27T06:30:00Z Suscol Creek at Napa Sans -0.07 ft 54.9 °F
2026-10-27T07:00:00Z Suscol Creek at Napa Sans -0.07 ft 54.5 °F
2026-10-27T07:30:00Z Suscol Creek at Napa Sans -0.08 ft 54.0 °F
2026-10-27T08:00:00Z Suscol Creek at Napa Sans -0.07 ft 53.3 °F
2026-10-27T08:30:00Z Suscol Creek at Napa Sans -0.06 ft 52.6 °F
2026-10-27T09:00:00Z Suscol Creek at Napa Sans -0.06 ft 51.9 °F
2026-10-27T09:30:00Z Suscol Creek at Napa Sans -0.06 ft 51.5 °F
2026-10-27T10:00:00Z Suscol Creek at Napa Sans -0.06 ft 51.0 °F
2026-10-27T10:30:00Z Suscol Creek at Napa Sans -0.06 ft 50.5 °F
2026-10-27T11:00:00Z Suscol Creek at Napa Sans -0.06 ft 50.0 °F
2026-10-27T11:30:00Z Suscol Creek at Napa Sans -0.06 ft 49.4 °F
2026-10-27T12:00:00Z Suscol Creek at Napa Sans -0.06 ft 48.9 °F
2026-10-27T12:30:00Z Suscol Creek at Napa Sans -0.06 ft 48.5 °F
2026-10-27T13:00:00Z Suscol Creek at Napa Sans -0.06 ft 48.4 °F
2026-10-27T13:30:00Z Suscol Creek at Napa Sans -0.06 ft 48.0 °F
2026-10-27T14:00:00Z Suscol Creek at Napa Sans -0.06 ft 47.6 °F
2026-10-27T14:30:00Z Suscol Creek at Napa Sans -0.06 ft 47.6 °F
2026-10-27T15:00:00Z Suscol Creek at Napa Sans -0.06 ft 47.6 °F
2026-10-27T15:30:00Z Suscol Creek at Napa Sans -0.06 ft 47.8 °F
2026-10-27T16:00:00Z Suscol Creek at Napa Sans -0.06 ft 48.2 °F
2026-10-27T16:30:00Z Suscol Creek at Napa Sans -0.06 ft 48.9 °F
2026-10-27T17:00:00Z Suscol Creek at Napa Sans -0.06 ft 54.5 °F
2026-10-27T17:30:00Z Suscol Creek at Napa Sans -0.08 ft 53.8 °F
2026-10-27T18:00:00Z Suscol Creek at Napa Sans -0.05 ft 54.2 °F
2026-10-27T18:30:00Z Suscol Creek at Napa Sans — 54.5 °F
2026-10-27T19:00:00Z Suscol Creek at Napa Sans — 54.5 °F
2026-10-27T19:30:00Z Suscol Creek at Napa Sans — 55.0 °F
2026-10-27T20:00:00Z Suscol Creek at Napa Sans — 60.6 °F
2026-10-27T20:30:00Z Suscol Creek at Napa Sans — 61.9 °F
2026-10-27T21:00:00Z Suscol Creek at Napa Sans — 61.1 °F
2026-10-27T21:30:00Z Suscol Creek at Napa Sans — 60.9 °F
2026-10-27T22:00:00Z Suscol Creek at Napa Sans — 61.1 °F
2026-10-27T22:30:00Z Suscol Creek at Napa Sans — 61.6 °F
2026-10-27T23:00:00Z Suscol Creek at Napa Sans — 66.1 °F
2026-10-27T23:30:00Z Suscol Creek at Napa Sans — 64.7 °F
2026-10-28T00:00:00Z Suscol Creek at Napa Sans — 63.8 °F
2026-10-28T00:30:00Z Suscol Creek at Napa Sans — 63.0 °F
2026-10-28T01:00:00Z Suscol Creek at Napa Sans — 62.1 °F
2026-10-28T01:30:00Z Suscol Creek at Napa Sans — 60.9 °F
2026-10-28T02:00:00Z Suscol Creek at Napa Sans — 59.9 °F
2026-10-28T02:30:00Z Suscol Creek at Napa Sans — 58.7 °F
2026-10-28T03:00:00Z Suscol Creek at Napa Sans — 57.8 °F
2026-10-28T03:30:00Z Suscol Creek at Napa Sans — 57.1 °F
2026-10-28T04:00:00Z Suscol Creek at Napa Sans — 56.3 °F
2026-10-28T04:30:00Z Suscol Creek at Napa Sans — 55.6 °F
2026-10-28T05:00:00Z Suscol Creek at Napa Sans — 54.9 °F
2026-10-28T05:30:00Z Suscol Creek at Napa Sans — 54.2 °F
2026-10-28T06:00:00Z Suscol Creek at Napa Sans — 53.8 °F

Download the data

Download all readings for this stream (CSV) 13 MB

This is the complete record for Suscol Creek as one CSV file, rebuilt by the publisher on every build. The archive copy of the same readings may be split into yearly segments; this file is not a link to a segment and always has the same name.

What is in the file

One row per reading, plus a header row that is always there: UTF-8 without a byte-order mark, LF line endings, and RFC 4180 quoting, so a field is quoted only when it holds a comma, a quote, or a line break. Rows are in a fixed order — gage, then measurement, then time — which is what lets two versions of the file be compared line by line to find what changed. Values are the exact numbers the site stores, not rounded for display; the unit each one is in travels with it in the row, in unit_metric, unit_imperial, and raw_unit. Both observed_at_utc and ingested_at_utc are ISO-8601 in UTC with a trailing Z and whole seconds, so a timestamp is never ambiguous across the daylight-saving change; the local times in the table above are those same instants read in the gage's time zone.

stream_slug
Which stream the reading belongs to. Every row of this file is the same stream.
gage_slug
Which gage on that stream took it — a stream can have more than one.
logger_sn
The data logger's serial number, recorded with the reading and never rewritten.
sensor_sn
The sensor's serial number, so swapping a sensor later cannot move an old reading's provenance.
measurement_type
What was measured, as a code — the same codes this page labels in its own column headings.
observed_at_utc
When the reading was taken, as ISO-8601 UTC with a trailing Z, whole seconds: 2026-09-14T21:45:00Z.
value_metric
The value in metric units, exactly as the site stores it.
unit_metric
The unit value_metric is in, written in each row beside it.
value_imperial
The same value in US units, converted with the unit registry's factor and rounded to its precision plus two places.
unit_imperial
The unit value_imperial is in.
raw_value
The value as the logger reported it, before any conversion.
raw_unit
The unit raw_value is in, as the logger reported it.
source
Which ingest path produced the row, so a change of instrument is visible in the data.
ingested_at_utc
When the site stored the reading, in ISO-8601 UTC with a trailing Z — when it arrived, not when it was measured.

Attribution: data from LI-COR Cloud gages, published by Water Audit California. Please keep the gage and the observation time with any value you reuse, so it can be checked.

License: the readings are published under the MIT/X Consortium License.

About this data

Water level at gage: depth of water above the sensor, relative to the level recorded when the logger was installed. It is not a surveyed river stage and can't be compared between gages.

7-day average daily high temperature (7DADM): the mean of the daily maximum water temperature over seven consecutive local days, calculated only when all seven days are complete. The steelhead bands below are applied to that value, never to a single reading.

All times shown are gage-local time (America/Los_Angeles), the same zone the site is configured for; data files carry UTC timestamps.

Steelhead water-temperature bands, applied to the 7-day average daily high.
Band 7-day average daily high What it means
Good at or below 60.8 °F Good for young steelhead
Stressful above 60.8 °F and below 71.6 °F Stressful: slower growth, more disease
Dangerous at or above 71.6 °F Dangerous: can kill steelhead
Federal reference 68.0 °F Federal recovery-plan limit for suitable summer rearing.
Heat spike 75.2 °F A single reading or daily high at or above this value.

Biological thresholds from published research (EPA 2003 and others), not legal limits. Sources: EPA Region 10 (2003) Tables 1, 3, and 4; NMFS 2016 recovery plan, Vol. IV; WDOE 2002 via Carter 2005; Nielsen et al. 1994; Sullivan et al. 2000.

Thresholds are pending scientific review.

Seasonal limits for spawning and smoltification are configured but not applied.

Measurements come from LI-COR Cloud loggers and configured CDEC stations, published by Water Audit California.