Streamflow
Above normalSan Juan River at Farmington streamflow
Daily mean discharge, San Juan-Colorado basin, New Mexico
Data through Oct 15, 2026 · source last checked Oct 17, 2026 · page revised Oct 16, 2026
Cite
- Discharge
About this data
- Source
- US Geological Survey (USGS)
- Series
- Daily mean streamflow (discharge)
- Geography
- San Juan River at Farmington
- Unit
- cfs
- Calculation
- Daily mean
- Last observation
- Oct 15, 2026
- Update frequency
- Daily
Now 2,400 cfs, 274% above the 3-yr median.
San Juan at Farmington hit 2,400 cfs, up 228.8% on the week from 730 cfs. The flow is 274% above its 3-year median. Year over year, it dropped 59.7% from 5,960 cfs.
| Period | Current | Prior | Change |
|---|---|---|---|
| Week over week | 2,400 cfs | 730 cfs | +228.8% |
| Month over month | 2,400 cfs | 1,260 cfs | +90.5% |
| Year over year | 2,400 cfs | 5,960 cfs | -59.7% |
| vs 3-yr median | 2,400 cfs | 642 cfs | +273.8% |
| Reading | Discharge |
|---|---|
| Lowest on record for this week | 482 cfs |
| Median for this week | 642 cfs |
| Highest on record for this week | 5,960 cfs |
Previous weeks
An earlier week
San Juan River discharge at Farmington reached 1,960 cfs, 221% above the 3-yr median. The gauge rose 135% week over week and 115% month over month. Year over year, discharge ran 66% below its prior level of 5,820 cfs.
Week of Oct 7, 2026
Farmington discharge dropped to 833 cfs, down 74.4% on the week. The river remains 15% above the 3-yr median.
Week of Sep 30, 2026
Streamflow at Farmington reached 3,260 cfs, 372% above the 3-year median. Over the week, the gauge rose 207.5%, from 1,060 cfs to 3,260 cfs. Flow also stands 268.8% above the prior month and 359.2% above year-ago.
Week of Sep 22, 2026
San Juan River at Farmington ran at 1,060 cfs on September 22, 12% above the 3-yr median. Flow retreated 15.9% over the week but is up 21.6% month-over-month and 89.3% year-over-year.
About San Juan River at Farmington
The San Juan River at Farmington ran 2,400 cfs on Oct 15, 2026: 2,400 cubic feet of water passing the gauge every second (what cfs means), or about 4,760 acre-feet a day. That is about 3.7 times the 3-year median of 642 cfs for the date. A month earlier it ran 1,260 cfs on Sep 15, 2026, so the river has risen 90% since then. The managed part of this flow is released from Navajo Reservoir upstream, and the river carries on west to the San Juan arm of Lake Powell.
USGS gage 09365000 sits on the San Juan River at Farmington, New Mexico, below the Animas River confluence and about 40 river miles downstream of Navajo Dam. It combines two very different sources: the managed release the Archuleta gage measures upstream, and the Animas, which drains the San Juan Mountains above Durango with no major mainstem storage on it.
That mix gives this gage a real snowmelt signature that the regulated station above it lacks. A normal year rises through May on Animas runoff, peaks in late May or June, and falls into a low late summer supported mostly by the Navajo release. Because the unregulated half of the flow arrives here, this is the better gage for reading what the San Juan Mountains actually produced. Low readings through the summer tighten conditions for irrigators in the Farmington reach and for the endangered-fish flows targeted further down the river.