Washington County Water Intelligence Brief

Washington County Water Conservancy District Service Area | June 2, 2026

1. Situation Summary

Washington County faces a challenging early-summer water situation. The 2025–2026 winter produced one of the poorest snowpack records in recent regional memory, compounded by an extreme March heat wave that accelerated snowmelt well ahead of the normal seasonal progression. As of early June, snowpack across the Virgin River basin headwaters has fully ablated, removing the seasonal recharge buffer that typically sustains streamflow into July. For a rapidly growing metro area now approaching 190,000 residents, this underscores the critical importance of managed storage at Quail Creek and Sand Hollow reservoirs — both operated by the Washington County Water Conservancy District (WCWCD) — and of the Navajo Sandstone aquifer as a conjunctive use resource.

The Colorado River system context adds a second layer of concern. Washington County sits within the Lower Colorado River basin (Virgin River, HUC 15), and Lake Powell and Lake Mead have experienced prolonged stress from multi-year drought and overallocation across the basin. The proposed Lake Powell Pipeline, which would have provided a long-term supplemental Colorado River supply to Washington County, remains dormant due to ongoing federal review delays and Colorado River system-wide challenges. Long-term supply planning must be understood against this backdrop.

2. Snowpack Conditions

SNOTEL monitoring across the Virgin River basin headwaters shows complete snowpack depletion as of June 1, 2026:

| Station | SWE (in.) | Snow Depth (in.) |

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

| Gardner Peak | 0.0 | 0.0 |

| Gutz Peak | 0.0 | 0.0 |

| Kolob | 0.0 | N/A |

| Long Valley Jct | 0.0 | 1.0 |

| Webster Flat | 0.0 | N/A |

All five reporting stations show 0.0 inches of snow water equivalent. The Long Valley Junction station records a residual 1.0-inch snow depth, likely representing a trace accumulation without meaningful water content. No additional snowmelt-driven runoff contribution to Virgin River system streamflows should be anticipated for the remainder of the season. It should be noted that southwest Utah has sparser SNOTEL coverage than northern Utah mountain ranges; monitoring gaps exist in portions of the Virgin River basin headwaters, and WCWCD staff should consult supplemental remote sensing or cooperative observation sources where available.

3. Streamflow Conditions

USGS gauge data as of June 2, 2026 reflects current conditions across the Virgin River system:

| Gauge | Flow (cfs) | Trend |

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

| East Fork Virgin River nr. Springdale | 39 | Stable |

| North Fork Virgin River nr. Springdale | 37 | Stable |

| Virgin River at Virgin | 82 | Stable |

| Virgin R. above La Verkin Creek nr. La Verkin | 33 | Stable |

| Santa Clara River near Pine Valley | 8 | Falling |

| Santa Clara River at St. George | 3 | Stable |

The mainstem Virgin River at Virgin registers 82 cfs and is holding stable, as are the East and North Fork contributions near Springdale. The La Verkin gauge at 33 cfs suggests mid-system losses or diversions between the Springdale confluence area and La Verkin — a pattern typical of summer irrigation demand and channel transmission. Most notably, the Santa Clara River at St. George is reporting only 3 cfs (stable), with the upper Pine Valley gauge falling at 8 cfs. The Santa Clara system provides an important tributary contribution to the greater Washington County water supply picture; these low and declining flows warrant close monitoring by WCWCD operations staff. With snowpack fully depleted, flows across all gauges are now sustained primarily by baseflow and any remaining soil moisture drainage — a supply that will diminish through the summer months.

4. Key Reservoir Systems

WCWCD's managed storage infrastructure represents the primary near-term surface water supply buffer for Washington County:

Municipal and industrial users should contact WCWCD directly for current storage status at these facilities. Do not reference Lake Powell as a Washington County storage facility — it is a federal Bureau of Reclamation facility on the Colorado River mainstem and a separate system from WCWCD's managed infrastructure, though its elevation has direct policy relevance to the Lake Powell Pipeline discussion.

5. Water Rights Administration Outlook

Washington County operates within the Virgin River Compact and the broader Colorado River Compact framework. The Virgin River system is a tributary to the Colorado River, and Lower Basin shortage conditions on the Colorado system — while not directly triggering curtailments on Virgin River water rights — create an administrative and policy environment that warrants careful attention from WCWCD planners and stakeholders.

Within the Virgin River basin, a poor snowpack year combined with falling tributary flows on the Santa Clara system increases the likelihood that junior water rights holders may experience reduced deliveries or informal supply constraints as summer demand peaks. Agricultural users in Hurricane Valley and the Enterprise area should review their water right priority dates with the Utah Division of Water Rights and plan for the possibility of supply limitations during peak irrigation season.

Water rights held by the Shivwits Band of Paiutes, whose tribal lands are located near St. George, are a recognized component of Washington County water rights administration. WCWCD and other water managers should ensure that tribal water right obligations are properly accounted for in any demand or curtailment scenario planning.

The Lake Powell Pipeline, as a proposed supplemental supply, remains a dormant policy question. Its current status does not provide near-term supply relief, reinforcing the importance of managing existing storage assets and groundwater resources conservatively.

6. Groundwater Considerations

The Navajo Sandstone aquifer is Washington County's primary regional groundwater resource — a significant and regionally extensive aquifer system extending south into Arizona. Conjunctive use of surface water supplies and Navajo Sandstone groundwater is an increasingly critical management strategy as the metro area continues rapid growth. During low-surface-water years, groundwater pumping demand on the Navajo Sandstone system tends to increase, which can affect long-term aquifer sustainability if not carefully managed.

Water managers and new well applicants are reminded to verify water rights with the Utah Division of Water Rights before expanding groundwater pumping. WCWCD should monitor any increased aquifer stress indicators during the current low-surface-water period.

7. Management Recommendations

Immediate Actions (Next 30 Days)

Planning Actions (30–90 Days)

Efficiency and Conservation Actions (Ongoing)

8. Historical Context

The current conditions have meaningful precedent in recent regional history. The 2021 drought year placed significant stress on Virgin River system storage and contributed to elevated Colorado River system shortage declarations, with Lake Powell reaching historically low elevations and triggering emergency measures at the federal level. 2015 was similarly notable for poor Mountain West snowpack and early runoff, requiring water managers across the Colorado River basin to rely heavily on carry-over storage and demand management. The 1977 drought remains a benchmark low-water year across the West, during which municipal systems across the Colorado River basin faced acute supply stress and emergency conservation measures were widely implemented.

In each of these analog years, communities that had invested in managed storage and diversified supply portfolios — including conjunctive groundwater use — fared considerably better than those relying primarily on annual runoff. Washington County's investments in Sand Hollow and Quail Creek reservoirs, and the Navajo Sandstone aquifer conjunctive use program, reflect lessons from those periods. The current season reinforces the value of those assets and the urgency of managing them conservatively through summer.

Data Sources

NRCS SNOTEL network (5 stations, Virgin River basin); USGS National Water Information System (6 gauges, June 2, 2026); National Weather Service seasonal outlooks.

Data Current As Of

SNOTEL data through June 1, 2026; USGS streamflow data through June 2, 2026. Reservoir storage data not included in this brief — contact WCWCD directly for current storage figures.

Important Disclaimers

This brief provides automated analysis for informational purposes only. Specific numerical claims have not been independently verified. Storage capacity figures cited in background context are approximate and subject to operational and hydrological variation. This brief does not constitute legal water rights advice. Consult official sources including the Washington County Water Conservancy District (WCWCD) for reservoir and supply status, the Utah Division of Water Rights for water rights administration and curtailment questions, the Utah Division of Water Resources for statewide planning context, and the U.S. Bureau of Reclamation Upper Colorado Region for Colorado River Compact and Lake Powell status information.

Update Schedule

This brief is intended for weekly updates during active drought or low-water conditions. Recommend increasing to twice-weekly updates if Santa Clara River flows at St. George fall below 2 cfs or if WCWCD issues a storage advisory.

*Prepared for Washington County Water Conservancy District and Washington County agricultural stakeholders. For questions regarding this brief, contact your WCWCD water resources team.*