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Hi3 Water

Maryland Water Assets

Mid-Atlantic

Maryland's water resources include Coastal Plain confined aquifers, Piedmont fractured rock aquifers, and the Chesapeake Bay watershed.

Regulated Riparian23 counties tracked2041 active alerts
68,399
Total Assets
55.3
Avg WIS
38,885
Verified
0
High WIS (75+)

Maryland Water Intelligence Report

Hi3 Water tracks 68,399 water assets across Maryland, spanning 23 counties and 5 distinct asset types. The average Water Intelligence Score (WIS) across Maryland is 55.3/100, with 0 assets scoring in the high-value range (75+). Maryland operates under Regulated Riparian water law, which directly affects water rights acquisition and asset valuation in this state.

The dominant water asset type in Maryland is River (37,626 assets, avg WIS 64.6). The highest concentration is in Washington County with 3,153 tracked assets.

2,041 active regulatory alerts are currently tracked in Maryland, 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 29, 2026.

Asset Types in Maryland

River
37,626
Avg WIS 64.6
Well
28,712
Avg WIS 43.7
Spring
802
Avg WIS 41.5
Lake
778
Avg WIS 42.0
Reservoir
481
Avg WIS 58.9

Intelligence Grade Distribution

How Maryland assets are graded

S (≥90) — Exceptional0 (0.0%)
A (75-89) — Excellent0 (0.0%)
B (55-74) — Good37,915 (55.4%)
C (35-54) — Fair30,484 (44.6%)
D (<35) — Limited0 (0.0%)

Regulatory Alerts

Drought, EPA violations, and enforcement actions affecting Maryland

9
critical
26
high
2003
medium
3
low
0
info
Little Deer Creek Reservoir near Shawsville, MD — Gage Height 513.1 ft
usgs_flood · flood_warning
PATAPSCO RIVER NEAR CATONSVILLE, MD — Gage Height 10.7 ft
usgs_flood · flood_warning
SUSQUEHANNA RIVER AT CONOWINGO, MD — Gage Height 16.4 ft
usgs_flood · flood_warning

Top Counties in Maryland

Washington
3,153 assetsWIS 43
Harford
2,565 assetsWIS 42
Anne Arundel
2,563 assetsWIS 44
Howard
2,530 assetsWIS 42
Frederick
2,268 assetsWIS 42
Kent
1,988 assetsWIS 50
Baltimore
1,791 assetsWIS 44
Garrett
1,449 assetsWIS 44
Cecil
1,406 assetsWIS 42
Charles
1,143 assetsWIS 45
St. Mary's
1,097 assetsWIS 45
Worcester
1,016 assetsWIS 43

Aquifer Type Mix

confined
3,686
Avg WIS 53
unconfined
2,678
Avg WIS 45

Top 10 Water Assets in Maryland

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

View all on map
  1. 1

    Skidmore Fork

    River
    ·9,047 GPM
    67
    WIS
  2. 2

    Blackwater River

    River
    ·16,377 GPM
    67
    WIS
  3. 3

    Broad Ford Run

    River
    ·5,558 GPM
    67
    WIS
  4. 4

    Bullpasture River

    River
    ·25,935 GPM
    67
    WIS
  5. 5

    Skidmore Fork

    River
    ·7,608 GPM
    67
    WIS
  6. 6

    Teter Run

    River
    ·2,574 GPM
    67
    WIS
  7. 7

    Teter Run

    River
    ·1,496 GPM
    67
    WIS
  8. 8

    Stony River

    River
    ·32,660 GPM
    67
    WIS
  9. 9

    Blackwater River

    River
    ·40,346 GPM
    67
    WIS
  10. 10

    Benson Run

    River
    ·5,402 GPM
    67
    WIS
Avg Flow Rate
201,916 GPM
Avg Depth
187 ft
For Sale
0
Fossil Water
0

Explore Maryland on the Interactive Map

View all 68,399 water assets, aquifer boundaries, water rights data, and regulatory alerts for Maryland.

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