Streamflow
Above normalSan Juan River at Farmington streamflow
Daily mean discharge, San Juan-Colorado basin, New Mexico
Data through Sep 30, 2026 · source last checked Oct 1, 2026 · page revised Oct 1, 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
- Sep 30, 2026
- Update frequency
- Daily
Now 3,260 cfs, 372% above the 3-yr median.
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.
| Period | Current | Prior | Change |
|---|---|---|---|
| Week over week | 3,260 cfs | 1,060 cfs | +207.5% |
| Month over month | 3,260 cfs | 884 cfs | +268.8% |
| Year over year | 3,260 cfs | 710 cfs | +359.2% |
| vs 3-yr median | 3,260 cfs | 691 cfs | +371.8% |
| Reading | Discharge |
|---|---|
| Lowest on record for this week | 568 cfs |
| Median for this week | 691 cfs |
| Highest on record for this week | 1,000 cfs |
Previous weeks
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.
Week of Sep 15, 2026
San Juan at Farmington reads 1,240 cfs, up 48.1% on the week. Flow sits 64% above the 3-year median. Year over year the gauge is up 2.5%.
Week of Sep 2, 2026
The gauge at Farmington read 841 cfs, down 9.9% on the week. Month over month, flow is up 20.0%. Against the 3-year median, the river is running 5% below normal.
Week of Aug 26, 2026
Farmington ran 933 cfs on August 26, up 9.6% on the week. The gauge sits 12% above its 3-year median.
About San Juan River at Farmington
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.