Streamflow

Well below normal

San Juan River at Farmington streamflow

Daily mean discharge, San Juan-Colorado basin, New Mexico

Last updated Jul 8, 2026

San Juan River at Farmington streamflow
ft^3/s

Now 795, 33% below the 5-yr median.

I'll write a clear page note that contextualizes the streamflow data and highlights the key trends.

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San Juan River at Farmington — Streamflow Summary

The San Juan River is running at 795 ft³/s, currently 33% below the 5-year median. Discharge is tracking slightly above last year (+1.9% YoY) but has declined significantly month-over-month (-45.9%), reflecting typical summer drawdown as snowmelt tapers. Week-over-week flow ticked up 8.9%, suggesting recent precipitation or tributary input, but the stream remains in the lower portion of its seasonal range.

Key Observations:

  • Below-median conditions: At 33% below the 5-year median, flows are constrained but not critically low. This is consistent with mid-summer hydrology in the San Juan basin.
  • Seasonal pattern on track: The sharp month-over-month decline (from 1,470 to 795 ft³/s) is expected as spring runoff transitions to summer baseflow.
  • Modest weekly improvement: The 8.9% week-over-week increase may indicate recent monsoon activity or groundwater contribution—worth monitoring for sustained recovery.

Context for Water Management: Current flows support standard diversion requirements and environmental baseflows, though the sub-median condition suggests limited headroom for additional demands. Watch for continued decline into late summer (August–September) as temperatures rise and precipitation becomes more sporadic.