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Hi3 Water

Arizona Water Assets

Southwest

Arizona manages water through a complex system of surface water rights, Active Management Areas for groundwater, and Colorado River allocations.

Prior Appropriation15 counties tracked2141 active alerts
115,401
Total Assets
50.5
Avg WIS
57,661
Verified
2
High WIS (75+)

Arizona Water Intelligence Report

Hi3 Water tracks 115,401 water assets across Arizona, spanning 15 counties and 7 distinct asset types. The average Water Intelligence Score (WIS) across Arizona is 50.5/100, with 2 assets scoring in the high-value range (75+). Arizona operates under Prior Appropriation water law, which directly affects water rights acquisition and asset valuation in this state.

The dominant water asset type in Arizona is Well (56,167 assets, avg WIS 42.8). The highest concentration is in Maricopa County with 9,131 tracked assets.

2,141 active regulatory alerts are currently tracked in Arizona, 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: August 23, 2026.

Asset Types in Arizona

Well
56,167
Avg WIS 42.8
River
47,314
Avg WIS 61.7
Lake
8,187
Avg WIS 42.2
Spring
3,092
Avg WIS 43.5
Reservoir
637
Avg WIS 50.1
Fossil Water
3
Avg WIS 76.0
Aquifer
1
Avg WIS 74.0

Intelligence Grade Distribution

How Arizona assets are graded

S (≥90) — Exceptional0 (0.0%)
A (75-89) — Excellent2 (0.0%)
B (55-74) — Good42,095 (36.5%)
C (35-54) — Fair73,304 (63.5%)
D (<35) — Limited0 (0.0%)

Regulatory Alerts

Drought, EPA violations, and enforcement actions affecting Arizona

40
critical
33
high
2028
medium
40
low
0
info
MOENKOPI WASH AT MOENKOPI, AZ — Gage Height 19.0 ft
usgs_flood · flood_warning
LYMAN LAKE NEAR ST. JOHNS, AZ — Gage Height 5949.6 ft
usgs_flood · flood_warning
CRAGIN DAM RESERVOIR NEAR PINE, AZ (BLUE RIDGE) — Gage Height 69.7 ft
usgs_flood · flood_warning

Top Counties in Arizona

Maricopa
9,131 assetsWIS 42
Cochise
7,368 assetsWIS 43
Yuma
6,514 assetsWIS 42
Pima
5,435 assetsWIS 43
Pinal
5,424 assetsWIS 42
Mohave
5,387 assetsWIS 43
Yavapai
4,850 assetsWIS 44
Graham
2,670 assetsWIS 42
La Paz
2,475 assetsWIS 42
Apache
1,780 assetsWIS 46
Navajo
1,703 assetsWIS 45
Coconino
1,577 assetsWIS 45

Aquifer Type Mix

unconfined
6,202
Avg WIS 45
confined
240
Avg WIS 55
fossil
3
Avg WIS 76

Top 10 Water Assets in Arizona

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

View all on map
  1. 1

    Coconino Sandstone Fossil Aquifer — Flagstaff Region

    Fossil Water
    Coconino County·200 GPM
    80
    WIS
  2. 2

    Black Mesa N-Aquifer Fossil Water — Navajo Nation

    Fossil Water
    Navajo County·150 GPM
    76
    WIS
  3. 3

    Coconino Aquifer — Verde Valley

    Aquifer
    Yavapai County·300 GPM
    74
    WIS
  4. 4

    Tucson Basin Deep Fossil Aquifer

    Fossil Water
    Pima County·250 GPM
    72
    WIS
  5. 5

    Lower Rose Canyon

    Reservoir
    ·326,749 GPM
    70
    WIS
  6. 6

    Cooley

    Reservoir
    ·184,021 GPM
    70
    WIS
  7. 7

    Wide Ruin Wash

    River
    ·4,703 GPM
    69
    WIS
  8. 8

    Willow Creek

    River
    ·14,106 GPM
    69
    WIS
  9. 9

    Spring Valley Wash

    River
    ·6,684 GPM
    69
    WIS
  10. 10

    Polacca Wash

    River
    ·9,536 GPM
    69
    WIS
Avg Flow Rate
507,461 GPM
Avg Depth
412 ft
For Sale
0
Fossil Water
3

Explore Arizona on the Interactive Map

View all 115,401 water assets, aquifer boundaries, water rights data, and regulatory alerts for Arizona.

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