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Check a river’s flow.

Search any USGS stream gauge by river or station name, by state, or near you. Each card shows the latest flow and how it compares with the normal range for today’s date; open a gauge for the full picture: trend, water temperature and what it means for trout, safety and the official NWS flood stage.

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67 USGS gauges near your location (within 30 miles)

CLACKAMAS RIVER AT ESTACADA, OR

USGS 14210000

Caution: Low water: go quiet and stealthy

The full view adds the NWS forecast.

Discharge: 720 ft³/s
Gauge height: 10.8 ft
Water temp: 48°F

Much below normal for Nov 5 Steady · 24 h Below NWS action stage

Last 24 hours

View data as a table

Discharge, last 7 days: readings, about hourly, newest first. USGS provisional data may be revised.
Time	Discharge (ft³/s)	Gauge height (ft)	Water temp (°F)
Nov 5, 3:45 PM PST	720	10.8	–
Nov 5, 2:45 PM PST	720	10.8	–
Nov 5, 1:45 PM PST	733	10.9	48
Nov 5, 12:45 PM PST	747	10.9	48
Nov 5, 11:45 AM PST	747	10.9	48
Nov 5, 10:45 AM PST	740	10.9	48
Nov 5, 9:45 AM PST	726	10.9	48
Nov 5, 8:45 AM PST	720	10.8	48
Nov 5, 7:45 AM PST	713	10.8	48
Nov 5, 6:45 AM PST	713	10.8	48
Nov 5, 5:45 AM PST	713	10.8	48
Nov 5, 4:45 AM PST	726	10.9	48
Nov 5, 3:45 AM PST	733	10.9	48.2
Nov 5, 2:45 AM PST	733	10.9	48.2
Nov 5, 1:45 AM PST	740	10.9	48.2
Nov 5, 12:45 AM PST	733	10.9	48.2
Nov 4, 11:45 PM PST	733	10.9	48.2
Nov 4, 10:45 PM PST	726	10.9	48.2
Nov 4, 9:45 PM PST	706	10.8	48.2
Nov 4, 8:45 PM PST	713	10.8	48.2
Nov 4, 7:45 PM PST	726	10.9	48.2
Nov 4, 6:45 PM PST	733	10.9	48
Nov 4, 5:45 PM PST	733	10.9	48
Nov 4, 4:45 PM PST	720	10.8	48
Nov 4, 3:45 PM PST	693	10.8	48
Nov 4, 2:45 PM PST	693	10.8	48
Nov 4, 1:45 PM PST	687	10.8	48

Reading Nov 5, 3:45 PM PST · checked 4:03 PM PST

Open full screen USGS NWS

On our page for Clackamas River

0.8 miles away in a straight line

NATE CREEK TRIBUTARY NEAR COLTON, OR

USGS 14199704

Caution: Low water: go quiet and stealthy

Discharge: 0.16 ft³/s
Gauge height: 1.71 ft
Water temp: 48.9°F

Much below normal for Nov 5 Steady · 24 h

Last 24 hours

View data as a table

Discharge, last 7 days: readings, about hourly, newest first. USGS provisional data may be revised.
Time	Discharge (ft³/s)	Gauge height (ft)	Water temp (°F)
Nov 5, 3:45 PM PST	0.16	1.71	48.9
Nov 5, 2:45 PM PST	0.16	1.71	48.9
Nov 5, 1:45 PM PST	0.16	1.71	48.7
Nov 5, 12:45 PM PST	0.16	1.71	48.6
Nov 5, 11:45 AM PST	0.16	1.71	48.4
Nov 5, 10:45 AM PST	0.16	1.71	48.2
Nov 5, 9:45 AM PST	0.16	1.71	48
Nov 5, 8:45 AM PST	0.16	1.71	47.8
Nov 5, 7:45 AM PST	0.16	1.71	47.8
Nov 5, 6:45 AM PST	0.16	1.71	48
Nov 5, 5:45 AM PST	0.16	1.71	48
Nov 5, 4:45 AM PST	0.16	1.71	48
Nov 5, 3:45 AM PST	0.16	1.71	48.2
Nov 5, 2:45 AM PST	0.16	1.71	48.2
Nov 5, 1:45 AM PST	0.16	1.71	48
Nov 5, 12:45 AM PST	0.16	1.71	48
Nov 4, 11:45 PM PST	0.18	1.72	48
Nov 4, 10:45 PM PST	0.16	1.71	48
Nov 4, 9:45 PM PST	0.16	1.71	47.8
Nov 4, 8:45 PM PST	0.16	1.71	47.8
Nov 4, 7:45 PM PST	0.16	1.71	47.8
Nov 4, 6:45 PM PST	0.16	1.71	47.7
Nov 4, 5:45 PM PST	0.16	1.71	47.7
Nov 4, 4:45 PM PST	0.16	1.71	47.5
Nov 4, 3:45 PM PST	0.16	1.71	47.3
Nov 4, 2:45 PM PST	0.16	1.71	47.1
Nov 4, 1:45 PM PST	0.16	1.71	46.8

CLEAR CREEK AT CARVER, OR

USGS 14210750

Limited data: Temperature fine for trout: no flow comparison here

No flow statistics here.

Discharge: 19.2 ft³/s
Gauge height: 7.63 ft
Water temp: 50.4°F

Steady · 24 h

Last 24 hours

View data as a table

Discharge, last 7 days: readings, about hourly, newest first. USGS provisional data may be revised.
Time	Discharge (ft³/s)	Gauge height (ft)	Water temp (°F)
Nov 5, 3:30 PM PST	19.2	7.63	50.4
Nov 5, 2:30 PM PST	19.2	7.63	50.4
Nov 5, 1:30 PM PST	19.2	7.63	50
Nov 5, 12:30 PM PST	19.2	7.63	49.6
Nov 5, 11:30 AM PST	19.2	7.63	49.1
Nov 5, 10:30 AM PST	19.2	7.63	48.6
Nov 5, 9:30 AM PST	19.2	7.63	48.2
Nov 5, 8:30 AM PST	19.2	7.63	48
Nov 5, 7:30 AM PST	19.6	7.64	48
Nov 5, 6:30 AM PST	19.6	7.64	48.2
Nov 5, 5:30 AM PST	19.6	7.64	48.2
Nov 5, 4:30 AM PST	19.6	7.64	48.4
Nov 5, 3:30 AM PST	19.6	7.64	48.4
Nov 5, 2:30 AM PST	19.6	7.64	48.4
Nov 5, 1:30 AM PST	19.6	7.64	48.2
Nov 5, 12:30 AM PST	19.6	7.64	48.2
Nov 4, 11:30 PM PST	19.6	7.64	48.2
Nov 4, 10:30 PM PST	19.6	7.64	48.2
Nov 4, 9:30 PM PST	19.6	7.64	48.2
Nov 4, 8:30 PM PST	19.2	7.63	48.2
Nov 4, 7:30 PM PST	19.6	7.64	48.4
Nov 4, 6:30 PM PST	19.6	7.64	48.4
Nov 4, 5:30 PM PST	19.6	7.64	48.6
Nov 4, 4:30 PM PST	19.6	7.64	48.6
Nov 4, 3:30 PM PST	19.6	7.64	48.6
Nov 4, 2:30 PM PST	19.6	7.64	48.4
Nov 4, 1:30 PM PST	19.6	7.64	48

BADGER CREEK NEAR BORING, OR
USGS 452710122224800
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
No flow at this gauge. USGS does not publish discharge here, so there are no flow statistics either; it reports what is shown. We found no other gauge on the same river that publishes flow.
Open full screen USGS
11.3 miles away in a straight line
SUNSHINE CREEK NEAR DAMASCUS, OR
USGS 452657122244500
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
No flow at this gauge. USGS does not publish discharge here, so there are no flow statistics either; it reports what is shown. We found no other gauge on the same river that publishes flow.
Open full screen USGS
11.4 miles away in a straight line
JOHNSON CREEK ABV SE 327TH AVE NR COTTRELL, OR
USGS 452734122192700
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
No flow at this gauge. USGS does not publish discharge here, so there are no flow statistics either; it reports what is shown. Flow on the same river: JOHNSON CREEK AT REGNER ROAD, AT GRESHAM, OR (USGS 14211400, 5.1 miles away).
Open full screen USGS
11.7 miles away in a straight line
JOHNSON CREEK AT SE BLUFF RD, AT PLEASANT HOME, OR
USGS 452737122194200
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
No flow at this gauge. USGS does not publish discharge here, so there are no flow statistics either; it reports what is shown. Flow on the same river: JOHNSON CREEK AT REGNER ROAD, AT GRESHAM, OR (USGS 14211400, 4.9 miles away).
Open full screen USGS
11.7 miles away in a straight line
JOHNSON CREEK BLW SE REVENUE RD NR GRESHAM, OR
USGS 452743122201500
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
No flow at this gauge. USGS does not publish discharge here, so there are no flow statistics either; it reports what is shown. Flow on the same river: JOHNSON CREEK AT REGNER ROAD, AT GRESHAM, OR (USGS 14211400, 4.4 miles away).
Open full screen USGS
11.8 miles away in a straight line
BADGER CREEK AT RUGG ROAD NEAR GRESHAM, OR
USGS 452737122231400
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
No flow here now. USGS stopped publishing discharge at this gauge on Oct 27, 2015; it still reports what is shown. We found no other gauge on the same river that publishes flow.
Open full screen USGS
11.9 miles away in a straight line

SANDY RIVER BLW BULL RUN RIVER, NR BULL RUN, OR

USGS 14142500

Caution: Low water: go quiet and stealthy

The full view adds the NWS forecast.

Discharge: 395 ft³/s
Gauge height: 7.84 ft
Water temp: 49.3°F

Much below normal for Nov 5 Steady · 24 h Below NWS action stage

Last 24 hours

View data as a table

Discharge, last 7 days: readings, about hourly, newest first. USGS provisional data may be revised.
Time	Discharge (ft³/s)	Gauge height (ft)	Water temp (°F)
Nov 5, 3:45 PM PST	395	7.84	49.3
Nov 5, 2:45 PM PST	395	7.84	49.1
Nov 5, 1:45 PM PST	390	7.83	49.1
Nov 5, 12:45 PM PST	380	7.81	49.3
Nov 5, 11:45 AM PST	380	7.81	48.7
Nov 5, 10:45 AM PST	375	7.8	48
Nov 5, 9:45 AM PST	385	7.82	47.5
Nov 5, 8:45 AM PST	385	7.82	47.3
Nov 5, 7:45 AM PST	385	7.82	46.9
Nov 5, 6:45 AM PST	380	7.81	46.9
Nov 5, 5:45 AM PST	380	7.81	46.9
Nov 5, 4:45 AM PST	380	7.81	46.8
Nov 5, 3:45 AM PST	380	7.81	46.8
Nov 5, 2:45 AM PST	380	7.81	46.9
Nov 5, 1:45 AM PST	380	7.81	46.9
Nov 5, 12:45 AM PST	380	7.81	47.1
Nov 4, 11:45 PM PST	380	7.81	47.1
Nov 4, 10:45 PM PST	380	7.81	47.3
Nov 4, 9:45 PM PST	380	7.81	47.5
Nov 4, 8:45 PM PST	375	7.8	47.7
Nov 4, 7:45 PM PST	375	7.8	48
Nov 4, 6:45 PM PST	380	7.81	48.4
Nov 4, 5:45 PM PST	380	7.81	48.6
Nov 4, 4:45 PM PST	380	7.81	48.6
Nov 4, 3:45 PM PST	380	7.81	48.6
Nov 4, 2:45 PM PST	380	7.81	48.4
Nov 4, 1:45 PM PST	375	7.8	48.2

LITTLE SANDY RIVER NEAR BULL RUN, OR

USGS 14141500

Warning: Rising fast: be careful, conditions are changing

The full view adds the NWS forecast.

Discharge: 33 ft³/s
Gauge height: 1.85 ft
Water temp: 46°F

Below normal for Nov 5 Rising · 24 h

Last 24 hours

View data as a table

Discharge, last 7 days: readings, about hourly, newest first. USGS provisional data may be revised.
Time	Discharge (ft³/s)	Gauge height (ft)	Water temp (°F)
Nov 5, 3:15 PM PST	33	1.85	46
Nov 5, 2:15 PM PST	15.2	1.6	46
Nov 5, 1:15 PM PST	14.7	1.59	46
Nov 5, 12:15 PM PST	14.1	1.58	45.7
Nov 5, 11:15 AM PST	14.1	1.58	45.5
Nov 5, 10:15 AM PST	14.1	1.58	45.3
Nov 5, 9:15 AM PST	14.1	1.58	45
Nov 5, 8:15 AM PST	14.1	1.58	45
Nov 5, 7:15 AM PST	14.1	1.58	44.8
Nov 5, 6:15 AM PST	14.1	1.58	44.8
Nov 5, 5:15 AM PST	14.1	1.58	44.8
Nov 5, 4:15 AM PST	13.6	1.57	44.8
Nov 5, 3:15 AM PST	13.6	1.57	44.6
Nov 5, 2:15 AM PST	13.6	1.57	44.6
Nov 5, 1:15 AM PST	13.6	1.57	44.4
Nov 5, 12:15 AM PST	13.2	1.56	44.4
Nov 4, 11:15 PM PST	13.2	1.56	44.4
Nov 4, 10:15 PM PST	13.2	1.56	44.2
Nov 4, 9:15 PM PST	13.2	1.56	44.2
Nov 4, 8:15 PM PST	12.7	1.55	44.2
Nov 4, 7:15 PM PST	12.7	1.55	44.2
Nov 4, 6:15 PM PST	12.7	1.55	44.1
Nov 4, 5:15 PM PST	12.7	1.55	43.9
Nov 4, 4:15 PM PST	12.7	1.55	43.9
Nov 4, 3:15 PM PST	13.2	1.56	43.5
Nov 4, 2:15 PM PST	13.2	1.56	43.3
Nov 4, 1:15 PM PST	13.2	1.56	43

BULL RUN R AT LARSON'S BRIDGE, NEAR BULL RUN, OR
USGS 14140020
Limited data: Trout-friendly temperature: no flow comparison here
No flow statistics here.
Water temp
55.2°F
No flow at this gauge. USGS does not publish discharge here, so there are no flow statistics either; it reports what is shown. Flow on the same river: BULL RUN RIVER NEAR BULL RUN (RIVER ONLY), OR (USGS 14140000, 0.9 miles away).
Reading Nov 5, 3:45 PM PST · checked 4:03 PM PST
Open full screen USGS
12.1 miles away in a straight line

Checked Nov 5, 4:03 PM PST; readings refresh at most every 15 minutes and statistics daily. Provisional USGS data can be revised. Conditions change: re-check before you go. This is general guidance, not a fishing forecast, a safety guarantee or a statement about access.

CLACKAMAS RIVER AT ESTACADA, OR
USGS 14210000 · OR · live flow · gauge height · water temperature · 0.8 mi
Reading the gauge…
NATE CREEK TRIBUTARY NEAR COLTON, OR
USGS 14199704 · OR · live flow · gauge height · water temperature · 6.8 mi
Reading the gauge…
CLEAR CREEK AT CARVER, OR
USGS 14210750 · OR · live flow · gauge height · water temperature · 10 mi
Reading the gauge…
BADGER CREEK NEAR BORING, OR
USGS 452710122224800 · OR · no flow · water temperature · 11.3 mi
Reading the gauge…
SUNSHINE CREEK NEAR DAMASCUS, OR
USGS 452657122244500 · OR · no flow · water temperature · 11.4 mi
Reading the gauge…
JOHNSON CREEK ABV SE 327TH AVE NR COTTRELL, OR
USGS 452734122192700 · OR · no flow · water temperature · 11.7 mi
Reading the gauge…
JOHNSON CREEK AT SE BLUFF RD, AT PLEASANT HOME, OR
USGS 452737122194200 · OR · no flow · water temperature · 11.7 mi
Reading the gauge…
JOHNSON CREEK BLW SE REVENUE RD NR GRESHAM, OR
USGS 452743122201500 · OR · no flow · water temperature · 11.8 mi
Reading the gauge…
BADGER CREEK AT RUGG ROAD NEAR GRESHAM, OR
USGS 452737122231400 · OR · flow record ended · water temperature · 11.9 mi
Reading the gauge…
SANDY RIVER BLW BULL RUN RIVER, NR BULL RUN, OR
USGS 14142500 · OR · live flow · gauge height · water temperature · 11.9 mi
Reading the gauge…
LITTLE SANDY RIVER NEAR BULL RUN, OR
USGS 14141500 · OR · live flow · gauge height · water temperature · 12 mi
Reading the gauge…
BULL RUN R AT LARSON'S BRIDGE, NEAR BULL RUN, OR
USGS 14140020 · OR · no flow · water temperature · 12.1 mi
Reading the gauge…

48 more gauges (first 60 of 67)

JOHNSON CREEK AT TELFORD ROAD NEAR GRESHAM, ORUSGS 452753122233100 · OR · no flow · water temperature · 12.2 mi
JOHNSON CREEK ABV SUNSHINE CREEK NR GRESHAM, ORUSGS 452754122234200 · OR · no flow · water temperature · 12.3 mi
SUNSHINE CREEK AT MOUTH NEAR GRESHAM, ORUSGS 452755122234100 · OR · flow record ended · water temperature · 12.3 mi
N FK JOHNSON CR NR SE ORIENT DR, NR GRESHAM, ORUSGS 452807122215001 · OR · flow record ended · water temperature · 12.3 mi
N FK JOHNSON CREEK BLW ANDERSON RD, NR GRESHAM, ORUSGS 452806122231900 · OR · no flow · water temperature · 12.4 mi
SANDY RIVER NEAR MARMOT, ORUSGS 14137000 · OR · live flow · gauge height · 12.5 mi
CLACKAMAS RIVER AT CARTER BRIDGE, NEAR ESTACADA,ORUSGS 14209710 · OR · no flow · water temperature · 12.5 mi
BULL RUN RIVER NEAR BULL RUN (RIVER ONLY), ORUSGS 14140000 · OR · live flow · gauge height · 12.9 mi
CLACKAMAS RIVER NEAR OREGON CITY, ORUSGS 14211010 · OR · live flow · gauge height · water temperature · 12.9 mi
FISH CREEK NEAR THREE LYNX, ORUSGS 14209700 · OR · flow record ended · gauge height · water temperature · 13.5 mi
WILLAMETTE RIVER BELOW FALLS, AT OREGON CITY, ORUSGS 14207770 · OR · no flow · gauge height · water temperature · 13.8 mi
JOHNSON CREEK AT REGNER ROAD, AT GRESHAM, ORUSGS 14211400 · OR · live flow · gauge height · water temperature · 14 mi
WILLAMETTE RIVER ABOVE FALLS, AT OREGON CITY, ORUSGS 14207740 · OR · no flow · gauge height · 14 mi
BULL RUN RIVER BLW BULL RUN RES 2, NR BULL RUN, ORUSGS 14139940 · OR · live flow · gauge height · water temperature · 14.2 mi
KELLEY CREEK AT SE 159TH DRIVE AT PORTLAND, ORUSGS 14211499 · OR · live flow · gauge height · water temperature · 14.9 mi
JOHNSON CREEK AT SYCAMORE, ORUSGS 14211500 · OR · live flow · gauge height · water temperature · 15.1 mi
KELLY CREEK AT KANE ROAD NEAR GRESHAM, ORUSGS 14142580 · OR · live flow · gauge height · 15.5 mi
SOUTH FORK BULL RUN RIVER NEAR BULL RUN, ORUSGS 14139800 · OR · live flow · gauge height · water temperature · 15.5 mi
BEAVER CREEK AT TROUTDALE, ORUSGS 14142800 · OR · live flow · gauge height · 15.9 mi
TUALATIN RIVER AT WEST LINN, ORUSGS 14207500 · OR · live flow · gauge height · 16.7 mi
MOLALLA RIVER NEAR CANBY, ORUSGS 14200000 · OR · live flow · gauge height · water temperature · 17 mi
FAIRVIEW CREEK AT GLISAN ST NEAR GRESHAM, ORUSGS 14211814 · OR · live flow · gauge height · 17.1 mi
TUALATIN RIVER AT OSWEGO DAM, NEAR WEST LINN, ORUSGS 14207200 · OR · no flow · water temperature · 17.2 mi
CLACKAMAS RIVER ABOVE THREE LYNX CREEK, ORUSGS 14209500 · OR · live flow · gauge height · 17.5 mi
JOHNSON CREEK AT MILWAUKIE, ORUSGS 14211550 · OR · live flow · gauge height · water temperature · 18.3 mi
TRYON CREEK NEAR LAKE OSWEGO, ORUSGS 14211315 · OR · live flow · gauge height · 18.7 mi
SPRING TRIB 5 TO CRYSTAL SPRINGS LAKE NR TOLMAN STUSGS 452832122380900 · OR · no flow · water temperature · 19.1 mi
CRYSTAL SPRINGS CREEK AT BYBEE ST, PORTLAND, ORUSGS 14211542 · OR · live flow · gauge height · water temperature · 19.2 mi
CRYSTAL SPRINGS CREEK BLW REED LAKE AT PORTLAND ORUSGS 452857122375700 · OR · no flow · water temperature · 19.3 mi
CRYSTAL SPRINGS CR AT SMALL BRIDGE AT PORTLAND, ORUSGS 452845122381700 · OR · no flow · water temperature · 19.3 mi
CRYSTAL SPRINGS CREEK ABOVE RAILROAD, PORTLAND, ORUSGS 452844122382100 · OR · no flow · water temperature · 19.3 mi
PUDDING RIVER AT AURORA, ORUSGS 14202000 · OR · live flow · gauge height · water temperature · 20.2 mi
FIR CREEK NEAR BRIGHTWOOD, ORUSGS 14138870 · OR · live flow · gauge height · water temperature · 20.2 mi
NORTH FORK BULL RUN RIVER NEAR MULTNOMAH FALLS, ORUSGS 14138900 · OR · live flow · gauge height · water temperature · 20.5 mi
MOLALLA R AB PC NR WILHOIT, ORUSGS 14198500 · OR · live flow · gauge height · water temperature · 20.6 mi
OAK GROVE FORK AT RIPPLEBROOK CAMPGROUND, ORUSGS 14209250 · OR · live flow · gauge height · 20.7 mi
FANNO CREEK AT DURHAM, ORUSGS 14206950 · OR · live flow · gauge height · water temperature · 21.4 mi
BULL RUN RIVER NEAR MULTNOMAH FALLS, ORUSGS 14138850 · OR · live flow · gauge height · water temperature · 21.5 mi
WILLAMETTE RIVER AT PORTLAND, ORUSGS 14211720 · OR · live flow · gauge height · water temperature · 22.2 mi
BULL CREEK NEAR WILHOIT, ORUSGS 14198400 · OR · live flow · gauge height · 22.9 mi
FANNO CREEK AT 56TH AVE, AT PORTLAND, ORUSGS 14206900 · OR · live flow · gauge height · 23.3 mi
BUTTE CREEK AT MONITOR, ORUSGS 14201500 · OR · live flow · gauge height · water temperature · 23.6 mi
PUDDING RIVER NEAR WOODBURN, ORUSGS 14201340 · OR · live flow · gauge height · water temperature · 24.4 mi
BLAZED ALDER CREEK NEAR RHODODENDRON, ORUSGS 14138800 · OR · live flow · gauge height · 24.6 mi
CHICKEN CREEK ABV SEASONAL TRAIL, NR SHERWOOD, ORUSGS 14206752 · OR · live flow · gauge height · water temperature · 24.8 mi
OAK GROVE FORK ABOVE POWERPLANT INTAKE, OR.USGS 14209000 · OR · live flow · gauge height · 24.8 mi
COLLAWASH R NR BREITENBUSH, ORUSGS 14208300 · OR · live flow · gauge height · water temperature · 24.9 mi
CHICKEN CREEK AT SCHOLLS-SHERWOOD HWY, SHERWOOD ORUSGS 452230122512201 · OR · no flow · water temperature · 25.6 mi

Quick picks: our 2,852 waters by state

Each state opens its USGS gauges and our water pages there; a water opens the live cards for its gauges, or the NOAA tides for flats and surf.

Search covers 11,178 USGS stream gauges that reported discharge, gauge height or water temperature in the 183 days before 2026-10-23 (USGS series catalog); readings are fetched live when a gauge is shown.

Where these numbers come from

Discharge, gauge height, water temperature and water quality: U.S. Geological Survey readings (provisional, can be revised), cached for 15 minutes. Where USGS publishes a gauge’s flow only once a day, the latest daily mean is shown with its date.
Normal range: the 25th to 75th percentile of daily mean flow for the same calendar day over the gauge’s record (USGS daily statistics), classed as USGS does (hyswap).
Temperature guidance for trout quotes the gauge’s own state fish and wildlife agency; where we found none, it says so and quotes federal guidance (National Park Service, U.S. Fish and Wildlife Service). Cold-water safety quotes the NWS; dissolved oxygen and pH are read against EPA criteria. Each line names its source.
Flood stage and forecasts: the National Weather Service’s National Water Prediction Service and its Turn Around Don’t Drown guidance. Tides: NOAA Tides & Currents.

General guidance, not a fishing forecast, a safety guarantee or a statement about access. Planning a trip? The trip planner shows these readings on every day you fish a water.