Hi3 Water

Washington Water Assets

Pacific Northwest

Washington has abundant surface water resources and productive Columbia River Basalt and alluvial aquifer systems in the Columbia Basin.

Prior Appropriation40 counties tracked2387 active alerts
155,760
Total Assets
49.1
Avg WIS
48,189
Verified
991
High WIS (75+)

Washington Water Intelligence Report

Hi3 Water tracks 155,760 water assets across Washington, spanning 40 counties and 8 distinct asset types. The average Water Intelligence Score (WIS) across Washington is 49.1/100, with 991 assets scoring in the high-value range (75+). Washington operates under Prior Appropriation water law, which directly affects water rights acquisition and asset valuation in this state.

The dominant water asset type in Washington is Well (90,710 assets, avg WIS 40.8). The highest concentration is in Spokane County with 11,822 tracked assets.

2,387 active regulatory alerts are currently tracked in Washington, including EPA violations, drought declarations, and state water board enforcement actions. Always check the regulatory intelligence for any asset before making acquisition decisions.

Data sources: USGS Water Data, EPA ECHO, state water boards, and verified field reports. Water Intelligence Scores are computed across flow rate, geological stability, legal accessibility, sustainability, and rarity. Report last updated: June 28, 2026.

Asset Types in Washington

Well
90,710
Avg WIS 40.8
River
43,078
Avg WIS 64.5
Spring
15,692
Avg WIS 56.2
Lake
3,357
Avg WIS 42.1
Glacier
1,970
Avg WIS 43.6
Reservoir
950
Avg WIS 54.9
Aquifer
2
Avg WIS 78.0
Fossil Water
1
Avg WIS 80.0

Intelligence Grade Distribution

How Washington assets are graded

S (≥90) — Exceptional0 (0.0%)
A (75-89) — Excellent991 (0.6%)
B (55-74) — Good46,906 (30.1%)
C (35-54) — Fair107,863 (69.2%)
D (<35) — Limited0 (0.0%)

Regulatory Alerts

Drought, EPA violations, and enforcement actions affecting Washington

191
critical
82
high
2065
medium
49
low
0
info
CLOVER CREEK NEAR TILLICUM, WA — Gage Height 15.8 ft
usgs_flood · flood_warning
SOUTH PRAIRIE CREEK AT SOUTH PRAIRIE, WA — Gage Height 25.2 ft
usgs_flood · flood_warning
DESCHUTES RIVER NEAR RAINIER, WA — Gage Height 12.2 ft
usgs_flood · flood_warning

Top Counties in Washington

Spokane
11,822 assetsWIS 42
Yakima
9,906 assetsWIS 41
Thurston
9,382 assetsWIS 40
Pierce
8,437 assetsWIS 40
King
5,644 assetsWIS 40
Kitsap
3,986 assetsWIS 40
Grant
3,749 assetsWIS 41
Clark
3,553 assetsWIS 41
Snohomish
3,033 assetsWIS 40
Lewis
2,802 assetsWIS 40
Stevens
2,761 assetsWIS 42
Benton
2,584 assetsWIS 41

Aquifer Type Mix

unconfined
677
Avg WIS 45
confined
116
Avg WIS 52
fossil
1
Avg WIS 80
perched
1
Avg WIS 62

Top 10 Water Assets in Washington

Ranked by Water Intelligence Score — Washington's highest-scoring springs, wells, and aquifers.

View all on map
  1. 1

    Columbia Plateau Basalt Aquifer — Wahluke Slope

    Aquifer
    Grant County·1,000 GPM
    80
    WIS
  2. 2

    Columbia Plateau Deep Basalt Fossil Aquifer — Central Washington

    Fossil Water
    Grant County·700 GPM
    80
    WIS
  3. 3

    St — Cl S4-002950Cl

    Spring
    ·1,795 GPM
    78
    WIS
  4. 4

    St — Cl S4-085946Cl

    Spring
    ·1,347 GPM
    78
    WIS
  5. 5

    St — Cl S4-004402Cl

    Spring
    ·1,347 GPM
    78
    WIS
  6. 6

    St — Cl S4-112730Cl

    Spring
    ·2,244 GPM
    78
    WIS
  7. 7

    Ir — Ce S1-*16585Cwris

    Spring
    ·19,749 GPM
    76
    WIS
  8. 8

    Fs — Ce S1-*20468Cwris

    Spring
    ·3,142 GPM
    76
    WIS
  9. 9

    Mu Po — Ce S1-00547Cwris

    Spring
    ·56,104 GPM
    76
    WIS
  10. 10

    Dg Ir — Cl S4-151129Cl

    Spring
    ·8,977 GPM
    76
    WIS
Avg Flow Rate
803,646 GPM
Avg Depth
176 ft
For Sale
0
Fossil Water
1

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View all 155,760 water assets, aquifer boundaries, water rights data, and regulatory alerts for Washington.

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