One gauge cannot show every section.
A gauge can match the river and still miss a change farther upstream or downstream.
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River data check · 459 reports · August 10, 2026
Can you trust the river reading before you fish?
Check whether a river has a recent flow or temperature reading—and whether the gauge matches the water you plan to fish.
134of 459 river reports had a USGS water-temperature reading from the past 24 hours when we checked.
Pine Creek is one audited river—not a picture of national coverage.
This page checks BlueStreamFly's 459 river reports in 38 states. It does not cover every trout stream, river, or sensor in the country. The list includes trout, steelhead, salmon, mixed, and warmwater reports.
What it means before you fish
A gauge is not the same as an answer.
The useful question is not just “is there a number?” Ask whether the reading comes from your river section and whether it is recent.
A nearby gauge is only a clue.
It may show the general trend. It cannot prove water clarity, safe wading, or temperature at your access point.
Flow is not water temperature.
A river can have a recent flow reading but no recent temperature reading, which matters during summer heat.
What we found
Many rivers still need a better gauge match or a recent reading.
402 reports point to 400 USGS gauges. We have checked the river match for only 45reports so far.
Recent flow
Reports with a recent official flow reading when we checked.
Current water temperature
A key reading for deciding whether warm summer water may stress fish.
Current turbidity
This reading can help explain muddy water, but few reports have it.
RiverReports-only reports
We do not republish those readings until we have clear permission.
Check a river
See what the report can actually measure.
A gauge can match the river and still have no recent temperature reading. Check both before you use the number.
Find gauge links for all 459 reports
Open the full list to search for a river and see which readings were recent when we checked.
All 459 reports
How well each gauge matches its river.
A good river match does not mean the reading is recent. Those are two separate checks.
Gauge match checked
We checked that the linked USGS gauge is on the river in this report.
Nearby gauge — use as a clue
The gauge may show the general trend, but it does not measure every river section.
Gauge match not checked yet
A gauge is linked, but we have not checked how well it matches this river section.
No USGS gauge linked
This report has no working USGS gauge link. Other local monitoring may still exist.
Gauge relationship not clear
We do not yet know how the station relates to this river report.
Compare states
Recent temperature readings are much easier to find in some states.
Use the table to compare how many reports had a recent temperature reading.
| State | Reports | Exact controls | Surrogates | Pending / no gauge | Current discharge | Current temperature | Open reports |
|---|---|---|---|---|---|---|---|
| Maryland | 5 | 1 | 0 | 4 | 5 | 5 of 5 | State reports |
| Oklahoma | 1 | 0 | 1 | 0 | 1 | 1 of 1 | State reports |
| Oregon | 17 | 1 | 0 | 16 | 17 | 13 of 17 | State reports |
| Alaska | 9 | 1 | 0 | 8 | 8 | 6 of 9 | State reports |
| South Carolina | 6 | 1 | 0 | 5 | 6 | 4 of 6 | State reports |
| Connecticut | 2 | 1 | 0 | 1 | 2 | 1 of 2 | State reports |
| Georgia | 2 | 1 | 0 | 1 | 2 | 1 of 2 | State reports |
| Indiana | 2 | 1 | 0 | 1 | 1 | 1 of 2 | State reports |
| Montana | 26 | 1 | 0 | 25 | 25 | 13 of 26 | State reports |
| West Virginia | 10 | 1 | 0 | 9 | 7 | 5 of 10 | State reports |
| Wyoming | 12 | 1 | 2 | 9 | 11 | 6 of 12 | State reports |
| New York | 17 | 1 | 0 | 16 | 15 | 8 of 17 | State reports |
| North Carolina | 10 | 1 | 0 | 9 | 10 | 4 of 10 | State reports |
| Ohio | 5 | 1 | 0 | 4 | 5 | 2 of 5 | State reports |
| Arizona | 8 | 1 | 0 | 7 | 6 | 3 of 8 | State reports |
| Pennsylvania | 22 | 1 | 0 | 21 | 19 | 7 of 22 | State reports |
| Washington | 22 | 1 | 0 | 21 | 21 | 7 of 22 | State reports |
| Colorado | 58 | 1 | 1 | 56 | 41 | 15 of 58 | State reports |
| California | 48 | 1 | 1 | 46 | 40 | 12 of 48 | State reports |
| Michigan | 16 | 1 | 0 | 15 | 13 | 4 of 16 | State reports |
| Minnesota | 5 | 1 | 1 | 3 | 3 | 1 of 5 | State reports |
| New Jersey | 5 | 1 | 0 | 4 | 5 | 1 of 5 | State reports |
| Virginia | 16 | 1 | 0 | 15 | 14 | 3 of 16 | State reports |
| Wisconsin | 13 | 1 | 0 | 12 | 11 | 2 of 13 | State reports |
| Arkansas | 7 | 1 | 0 | 6 | 6 | 1 of 7 | State reports |
| New Hampshire | 7 | 1 | 0 | 6 | 6 | 1 of 7 | State reports |
| New Mexico | 8 | 1 | 0 | 7 | 8 | 1 of 8 | State reports |
| Idaho | 33 | 1 | 0 | 32 | 32 | 4 of 33 | State reports |
| Utah | 9 | 1 | 2 | 6 | 9 | 1 of 9 | State reports |
| Tennessee | 10 | 1 | 0 | 9 | 7 | 1 of 10 | State reports |
| Kentucky | 1 | 1 | 0 | 0 | 1 | 0 of 1 | State reports |
| Maine | 9 | 1 | 0 | 8 | 4 | 0 of 9 | State reports |
| Massachusetts | 6 | 1 | 0 | 5 | 6 | 0 of 6 | State reports |
| Missouri | 3 | 1 | 0 | 2 | 3 | 0 of 3 | State reports |
| Nevada | 1 | 1 | 0 | 0 | 1 | 0 of 1 | State reports |
| South Dakota | 13 | 1 | 0 | 12 | 13 | 0 of 13 | State reports |
| Texas | 9 | 1 | 0 | 8 | 9 | 0 of 9 | State reports |
| Vermont | 6 | 1 | 0 | 5 | 4 | 0 of 6 | State reports |
Where uncertainty comes from
“Not found” is not “does not exist.”
Reach fit
A station can be on the right river but still sit below a tributary, reservoir, diversion, or the reach you plan to fish.
Signal fit
USGS may report stage without discharge, or discharge without current water temperature or turbidity.
Source fit
State, tribal, university, watershed, hydropower, and local sensors may exist outside this official USGS probe.
Provisional data
Recent USGS observations can be provisional and may change after quality review.
Method and limits
How we checked the links.
We compared our river list with official USGS station records. “Recent” means the reading was no more than 24 hours old when we checked.
Check window: Aug 8, 2026, 1:33 AM UTC through Aug 10, 2026, 1:33 AM UTC. Counts checked at Aug 10, 2026, 1:33 AM UTC.
Capture note: a dated official USGS capture was normalized offline to the exact 400 configured stations. No second provider request or numeric observation values were added; fields the earlier capture did not preserve remain blank instead of being inferred.
- 01
Count every report once
All 459 river reports appear one time, with no hidden duplicates.
- 02
Count shared gauges once
402 reports point to 400 USGS gauges.
- 03
Keep each check separate
Gauge match, link status, reading date, and river section are checked on their own.
- 04
Show the limits
A forecast is not measured rain, and a gauge reading does not prove how the fishing will be.
Download, cite, correct
Use the finding. Keep the caveat.
BlueStreamFly Editorial Team. “The Trout-Stream Monitoring Gap: A 459-River Audit of U.S. Flow and Water-Temperature Data.” Method v1, August 10, 2026.
Attribute BlueStreamFly's compiled analysis separately from the underlying public-domain USGS records. Do not describe this as a census of every U.S. stream sensor.
Use it for today's decision