Water Intelligence Brief — Salt Lake County, UT

August 31, 2026 | Free-Tier Edition

Situation Summary

Jordan River flows at 1700 South are running at 184 cfs as of this morning, with Little Cottonwood Creek showing a rising signal at 7 cfs — a late-summer baseline that defines current delivery conditions for both municipal suppliers and the county's remaining agricultural users. For Salt Lake City Public Utilities, Jordan Valley Water Conservancy District, and Metropolitan Water District of Salt Lake & Sandy, the operational question this week is whether imported Provo River Project supply via the Provo Reservoir Canal remains adequate to sustain blended delivery as in-basin runoff continues its seasonal decline. Reservoir storage data, seven-day forecast details, and supplier-specific delivery outlooks are available in the full brief.

Snowpack Conditions

All SNOTEL stations in the Salt Lake County monitoring network are reporting at or near zero snow water equivalent as of August 30 — the expected condition for this date, as median SWE values are also zero at this point in the calendar. No station is reporting below-normal SWE relative to the late-August median.

| Station | SWE | Snow Depth |

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

| Atwater | 0.0" | 1.0" |

| Brighton | 0.0" | 0.0" |

| Dry Fork | 0.0" | 0.0" |

| Mill-D North | 0.0" | 0.0" |

| Snowbird | 0.2" | 1.0" |

The Snowbird trace reading (0.2" SWE, 1.0" depth) likely reflects a late-August storm remnant rather than meaningful storage; it carries no operational significance for municipal supply.

Station record note: Atwater (station 1308:UT:SNTL) has been reporting only since August 2022 — fewer than four years of record. For historical trend comparison, Brighton (records since 1986), Mill-D North (since 1988), and Snowbird (since 1989) should be weighted as the primary long-term indicators. Atwater readings cannot yet support robust multi-year comparisons.

Seasonal context: The relevant snowpack signal for 2026 supply planning is not today's reading but meltout timing: Wasatch Front stations melted out approximately four to six weeks ahead of the historical median meltout date, driven by an anomalous March heat wave. That early meltout accelerated runoff into late spring, compressing the delivery window for canyon-watershed imports and drawing down upstream Provo River Project storage earlier in the season than typical.

Streamflow Conditions

Two active USGS gauges are currently transmitting data for Salt Lake County:

The Jordan River reading reflects the integrated output of the county's primary surface drainage network at a stable late-summer level. The rising signal on Little Cottonwood Creek is notable for late August and may reflect recent precipitation or localized release activity; municipal suppliers and agricultural users drawing from this tributary should monitor whether the rise is sustained or transient.

Critical data gap: Big Cottonwood Creek (gauges 10168499 and 10169000), Mill Creek (10170000), and Parleys Creek (10171500) are discontinued USGS gauges and are not transmitting current data. These canyon streams are significant contributors to Salt Lake City Public Utilities' canyon watershed supply. Users requiring current flow data for these drainages should contact Salt Lake City Public Utilities directly for operational canyon flow information. The two active gauges above represent the full extent of real-time USGS streamflow monitoring available for Salt Lake County at this time.

Seasonal Guidance

*For municipal water managers, utility professionals, policy stakeholders, and agricultural users in Salt Lake County:*

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Data Sources: SNOTEL data through August 30, 2026; USGS streamflow data through August 31, 2026.

Data Current As Of: August 31, 2026. Water rights status current as of Utah Division of Water Rights records.

Important Disclaimers: This brief provides automated analysis for informational purposes only. Specific numerical claims have not been independently verified. Consult official sources including your local water district, U.S. Bureau of Reclamation Upper Colorado Region (for Deer Creek and Jordanelle reservoir operations), and Salt Lake City Public Utilities (canyon watershed storage) for regulatory decisions and water rights administration. Jordan River flows directly affect Great Salt Lake elevation; water managers should note that ongoing Utah Great Salt Lake elevation legislation and related litigation may affect water rights administration and consumption reporting obligations. This brief does not constitute legal, engineering, or water rights advice.