State rankings

States with the Most Water

Oregon has the highest Water Availability State Total in 2019 (109.1K mm/month), followed by California (95K mm/month) and Washington (91.9K mm/month). Delaware has the lowest (1,831 mm/month).

Environment51 states · 16 metricsUpdated Jul 27, 2026Original page
8 sources
Year 201948 of 51 states
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Water Availability State Total, 2019

Darker means higher. Click a place to highlight it.

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All 48 ranked

Highest first.

Distribution Median and middle halfThe median is the middle value: half of places are above it, half below. The middle half is the range holding the central 50% of places.More in the glossary →

Each dot is one state; the lines mark the median and the middle half.

Median
35.2K mm/month
Middle half 14.5K mm/month – 57.7K mm/month
Average
38.4K mm/month
48 states
Highest
109.1K mm/month
Oregon
Lowest
1,831 mm/month
Delaware

Data

Click a column to sort, a row to highlight that place on the charts.

48 states · # = rank by Water Availability State Total
#
1Oregon109.1K mm/month1.11 mm/month per mi²
2California95K mm/month0.58 mm/month per mi²
3Washington91.9K mm/month1.29 mm/month per mi²
4New York84K mm/month1.54 mm/month per mi²
5Pennsylvania69.1K mm/month1.5 mm/month per mi²
6Wisconsin62.3K mm/month0.95 mm/month per mi²
7Mississippi62.1K mm/month1.28 mm/month per mi²
8Alabama61.4K mm/month1.17 mm/month per mi²
9Missouri59.4K mm/month0.85 mm/month per mi²
10Michigan59.1K mm/month0.61 mm/month per mi²
11Kentucky57.9K mm/month1.43 mm/month per mi²
11Louisiana57.9K mm/month1.11 mm/month per mi²
13Arkansas57.6K mm/month1.08 mm/month per mi²
14North Carolina57.3K mm/month1.06 mm/month per mi²
15Maine57.2K mm/month1.62 mm/month per mi²
16Tennessee55.8K mm/month1.32 mm/month per mi²
17Iowa51.9K mm/month0.92 mm/month per mi²
18Georgia51.9K mm/month0.87 mm/month per mi²
19Ohio51.1K mm/month1.14 mm/month per mi²
20Indiana49.8K mm/month1.37 mm/month per mi²
21Minnesota49.3K mm/month0.57 mm/month per mi²
22Idaho45.8K mm/month0.55 mm/month per mi²
23Montana36.8K mm/month0.25 mm/month per mi²
24Illinois35.4K mm/month0.61 mm/month per mi²
25Virginia34.9K mm/month0.82 mm/month per mi²
26Florida33.3K mm/month0.51 mm/month per mi²
27Texas29.8K mm/month0.11 mm/month per mi²
28Colorado27.5K mm/month0.26 mm/month per mi²
29West Virginia26.1K mm/month1.08 mm/month per mi²
30Oklahoma24.7K mm/month0.35 mm/month per mi²
31South Carolina23.7K mm/month0.74 mm/month per mi²
32Wyoming20K mm/month0.2 mm/month per mi²
33Kansas16.1K mm/month0.2 mm/month per mi²
34Utah16K mm/month0.19 mm/month per mi²
35South Dakota15.9K mm/month0.21 mm/month per mi²
36New Hampshire15.3K mm/month1.64 mm/month per mi²
37Vermont11.9K mm/month1.23 mm/month per mi²
38New Jersey11.4K mm/month1.31 mm/month per mi²
39Nebraska11.4K mm/month0.15 mm/month per mi²
40Nevada10.7K mm/month0.1 mm/month per mi²
41Massachusetts9,614 mm/month0.91 mm/month per mi²
42North Dakota8,786 mm/month0.12 mm/month per mi²
43Connecticut8,193 mm/month1.48 mm/month per mi²
44Maryland8,127 mm/month0.66 mm/month per mi²
45Arizona5,044 mm/month0.04 mm/month per mi²
46New Mexico3,718 mm/month0.03 mm/month per mi²
47Rhode Island1,892 mm/month1.22 mm/month per mi²
48Delaware1,831 mm/month0.74 mm/month per mi²

What correlates with Water Availability State Total (2019)?

Pearson r against 2,104 other state metrics sharing at least 29 states. Correlation is not causation.

Higher together

Places that have a higher Water Availability State Total tend to score higher on these

  1. Total TimberLumber Production by State
    r = +0.85 · very strong · n = 48
    Plot
  2. TimberlandLumber Production by State
    r = +0.80 · very strong · n = 48
    Plot
  3. Forestry Direct Contribution to GDPLumber Production by State
    r = +0.72 · very strong · n = 48
    Plot
  4. Forestry Industry EmploymentLumber Production by State
    r = +0.68 · strong · n = 48
    Plot
  5. Forested Area (RPA)Most Forested States in the U.S.
    r = +0.65 · strong · n = 48
    Plot
  6. Total Forest AreaLumber Production by State
    r = +0.65 · strong · n = 48
    Plot

Opposite directions

Places that have a higher Water Availability State Total tend to score lower on these

  1. Overall Price Per AcreAcre Value by State
    r = −0.47 · moderate · n = 46
    Plot
  2. Average Cost per AcreCheapest Land by State
    r = −0.47 · moderate · n = 46
    Plot
  3. Median Price per AcreBest States To Homestead
    r = −0.47 · moderate · n = 48
    Plot
  4. Average # of Sunny Hours per YearSunniest States in the U.S.
    r = −0.45 · moderate · n = 46
    Plot
  5. Annual Sunlight PercentageSunniest States in the U.S.
    r = −0.45 · moderate · n = 46
    Plot
  6. Fuel Prices (1-10)Best States for Camping
    r = −0.44 · moderate · n = 48
    Plot

Quick answers

Which state has the highest Water Availability State Total?
Oregon has the highest Water Availability State Total in 2019, at 109.1K mm/month, followed by California (95K mm/month) and Washington (91.9K mm/month).
Which state has the lowest Water Availability State Total?
Delaware has the lowest Water Availability State Total in 2019, at 1,831 mm/month.
What is the median Water Availability State Total across US states?
The median is 35.2K mm/month across the 48 US states with data in 2019.
Where does this states with the most water data come from?
Rankodex compiles it from World Population Review and the primary sources it cites: Water Science School Home Page - USGS; State Area Measurements and Internal Point Coordinates - United States Census Bureau; State Water Facts - EPA; Model: Public Supply Withdrawals Water-Use Model - USGS.

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