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Hi3 Water

Maine Water Assets

New England

Maine has abundant surface water with over 6,000 lakes and significant sand and gravel aquifers from glacial deposits.

Riparian16 counties tracked2013 active alerts
91,857
Total Assets
52.8
Avg WIS
34,668
Verified
0
High WIS (75+)

Maine Water Intelligence Report

Hi3 Water tracks 91,857 water assets across Maine, spanning 16 counties and 6 distinct asset types. The average Water Intelligence Score (WIS) across Maine is 52.8/100, with 0 assets scoring in the high-value range (75+). Maine operates under Riparian water law, which directly affects water rights acquisition and asset valuation in this state.

The dominant water asset type in Maine is Well (56,645 assets, avg WIS 47.1). The highest concentration is in Cumberland County with 1,376 tracked assets.

2,013 active regulatory alerts are currently tracked in Maine, 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: October 16, 2026.

Asset Types in Maine

Well
56,645
Avg WIS 47.1
River
30,489
Avg WIS 64.9
Lake
3,581
Avg WIS 42.0
Reservoir
597
Avg WIS 46.9
Spring
544
Avg WIS 39.0
Fossil Water
1
Avg WIS 65.0

Intelligence Grade Distribution

How Maine assets are graded

S (≥90) — Exceptional0 (0.0%)
A (75-89) — Excellent0 (0.0%)
B (55-74) — Good30,604 (33.3%)
C (35-54) — Fair61,253 (66.7%)
D (<35) — Limited0 (0.0%)

Regulatory Alerts

Drought, EPA violations, and enforcement actions affecting Maine

0
critical
10
high
2002
medium
1
low
0
info
Hazardous Waste Facility: Troiano Waste Services
epa_rcra · hazardous_waste
Hazardous Waste Facility: Portland Water District
epa_rcra · hazardous_waste
Hazardous Waste Facility: Tradewinds Marketplace
epa_rcra · hazardous_waste

Top Counties in Maine

Cumberland
1,376 assetsWIS 41
Oxford
1,155 assetsWIS 40
York
1,068 assetsWIS 41
Franklin
902 assetsWIS 40
Androscoggin
607 assetsWIS 41
Penobscot
509 assetsWIS 41
Kennebec
405 assetsWIS 41
Aroostook
394 assetsWIS 41
Washington
262 assetsWIS 40
Hancock
225 assetsWIS 41
Waldo
92 assetsWIS 41
Sagadahoc
92 assetsWIS 40

Aquifer Type Mix

unconfined
294
Avg WIS 44
confined
151
Avg WIS 52
fossil
1
Avg WIS 65

Top 10 Water Assets in Maine

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

View all on map
  1. 1

    West Branch Moose River

    River
    ·4,575 GPM
    67
    WIS
  2. 2

    Ruisseau Clearwater

    River
    ·4,635 GPM
    67
    WIS
  3. 3

    South Branch Moose River

    River
    ·10,062 GPM
    67
    WIS
  4. 4

    Cupsuptic River

    River
    ·14,355 GPM
    67
    WIS
  5. 5

    West Branch Moose River

    River
    ·2,655 GPM
    67
    WIS
  6. 6

    Bereau Brook

    River
    ·1,847 GPM
    67
    WIS
  7. 7

    Number One Brook

    River
    ·3,886 GPM
    67
    WIS
  8. 8

    Cupsuptic River

    River
    ·8,030 GPM
    67
    WIS
  9. 9

    Massachusetts Bog Stream

    River
    ·1,337 GPM
    67
    WIS
  10. 10

    West Branch Moose River

    River
    ·2,845 GPM
    67
    WIS
Avg Flow Rate
297,912 GPM
Avg Depth
91 ft
For Sale
0
Fossil Water
1

Explore Maine on the Interactive Map

View all 91,857 water assets, aquifer boundaries, water rights data, and regulatory alerts for Maine.

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