Washington County, UT — Water Intelligence Brief

August 10, 2026 | Municipal & Agricultural Water Supply

Situation Summary

Washington County's Virgin River Basin enters mid-August 2026 operating on a late-spring pulse that has largely run its course, following an anomalous March heat wave that drove snowmelt across Southwest Utah 4–6 weeks ahead of the historical median meltout date. For a rapidly growing metro area of approximately 190,000 residents, WCWCD's managed surface storage at Quail Creek and Sand Hollow reservoirs — supplemented by Navajo Sandstone groundwater — remains the operational foundation of municipal supply, with Virgin River streamflows now reflecting summer baseflow conditions rather than snowmelt contribution. Reservoir storage data, 7-day forecast details, and depletion analysis are available in the full brief.

Snowpack Conditions

All five SNOTEL stations reporting for the Virgin River Basin headwaters show zero snowpack as of August 9–10, 2026 — consistent with normal seasonal conditions for this point in the calendar. At this date, a median SWE reading of 0.0" is expected across all monitored elevations; the stations are not below normal today. The operationally significant signal for 2026 is timing: stations across the region melted out 4–6 weeks ahead of the historical median meltout date, meaning the snowmelt-driven streamflow contribution to Virgin River tributaries concluded substantially earlier in the season than average.

Station readings as of August 9, 2026:

Water managers should note that Southwest Utah carries sparser SNOTEL coverage than northern Utah mountain ranges — the Virgin River basin headwaters are monitored by a limited station network, and the Gardner Peak data gap reduces confidence in headwater characterization this season. WCWCD and NWS Salt Lake City seasonal outlooks should be consulted alongside raw SNOTEL data for supply planning purposes.

Streamflow Conditions

Virgin River Basin streamflows are in a stable summer baseflow regime as of August 10, consistent with the post-snowmelt transition. The mainstem Virgin River at Virgin reads 58 cfs (stable), and flows consolidate downstream with the East Fork Virgin River near Springdale contributing 48 cfs (stable) and the North Fork Virgin River near Springdale adding 29 cfs (stable). The upper La Verkin reach — Virgin River above La Verkin Creek near La Verkin — shows 35 cfs (stable), reflecting tributary inputs below the Virgin gauge.

The Santa Clara River system presents notably tighter conditions. The Santa Clara River near Pine Valley reads 4 cfs (falling), a declining trend that warrants attention for Enterprise-area agricultural users and WCWCD planners monitoring the upper drainage. The Santa Clara River at St. George registers 2 cfs (stable) — minimal late-season flow reflecting the small contributing area and high consumptive demand upstream.

All gauge readings:

| Gauge | Flow | Trend |

|---|---|---|

| East Fork Virgin R. near Springdale | 48 cfs | Stable |

| North Fork Virgin R. near Springdale | 29 cfs | Stable |

| Virgin River at Virgin | 58 cfs | Stable |

| Virgin R. above La Verkin Cr. nr La Verkin | 35 cfs | Stable |

| Santa Clara River near Pine Valley | 4 cfs | Falling |

| Santa Clara River at St. George | 2 cfs | Stable |

For municipal planners: current Virgin River mainstem flows support WCWCD's Sand Hollow diversion and storage operations, though late-summer demand and early meltout timing reduce the remaining seasonal buffer available from direct river supply. For Hurricane Valley alfalfa producers and Enterprise-area livestock operators, the falling Pine Valley reading signals tightening upper Santa Clara availability for the balance of the irrigation season.

Seasonal Guidance

Subscribe for the full brief including reservoir storage, weather forecasts, depletion analysis, and detailed operational recommendations.

Data Sources: SNOTEL data through August 9, 2026; USGS streamflow data through August 10, 2026. NRCS SNOTEL network (5 stations), USGS National Water Information System (6 gauges).

Data Current As Of: August 10, 2026. Utah Division of Water Rights records current as of date of publication.

Important Disclaimers: This brief provides automated analysis for informational purposes only. Specific numerical claims have not been independently verified. Washington County Water Conservancy District (WCWCD) is the primary water authority for Quail Creek and Sand Hollow reservoirs — consult WCWCD directly for official storage and delivery data. Colorado River Basin conditions, including Lower Basin shortage determinations, are administered by USBR Lower Colorado Region; this brief does not constitute official compact or shortage status guidance. The Shivwits Band of Paiutes holds recognized water rights in Washington County — water administrators should account for tribal water interests in regional supply planning. The Lake Powell Pipeline remains a dormant but significant long-term policy context for Washington County supply planning and is subject to ongoing federal review. Consult your local water district and the Utah State Engineer's Office for regulatory decisions and water rights administration. This brief does not substitute for professional engineering, legal, or water management advice.