Headwater Summary Drag to move

Total Watersheds -

Headwaters -

Headwater % -

Watershed Info Drag to move • resize from corner

USGS Watershed Data Viewer

Fetch and display watershed boundaries directly from the USGS National Map API

Controls

Region

Region 04 (Great Lakes) is temporarily unavailable due to known watershed boundary issues along the Canadian border.

HUC Size

HUC Code (Optional) Tip: Click any watershed on the map to auto-fill this field!

Headwater Analysis Results

-

Total Watersheds

-

Headwaters
🔵 Blue on Map

-

Non-Headwaters
⚪ Gray on Map

-

Headwater %

Analysis Details

Method: -

Data Source: -

Region: -

HUC Size: -

Download Results

Files generated in /outputs/ directory:

How to Use

Supported Regions & HUC Codes:

Verified Working Regions:
• Region 03: South Atlantic-Gulf (Verified)
• Region 05: Ohio (Verified)
• Region 06: Tennessee (Verified)
• Region 08: Lower Mississippi (Verified)
Additional Regions (May Have Limited Availability):
• Region 01: New England
• Region 02: Mid-Atlantic
• Region 04: Great Lakes
• Region 07: Upper Mississippi
• Region 09: Souris-Red-Rainy
• Region 10: Missouri
• Region 11: Arkansas-White-Red
• Region 12: Texas-Gulf
• Region 13: Rio Grande
• Region 14: Upper Colorado
• Region 15: Lower Colorado
• Region 16: Great Basin
• Region 17: Pacific Northwest
• Region 18: California
HUC Code Format:
• HUC10: 10-digit codes starting with region number
• HUC12: 12-digit codes starting with region number
Note: Some regions may return errors due to USGS API issues.

Usage:

Fetch All: Select region and HUC size
Filter Specific: Enter a HUC code

Example Codes:

Region 06 HUC12: 060000000101

Features:

Direct API access
Interactive map
Auto boundary fitting
Real-time fetching
Validation

Restrictions & Notes:

Only HUC10/HUC12
Cannot mix regions
Depends on USGS API
03, 05, 06, 08 verified