The following are links to agencies, organizations, and groups that operate real-time hydrologic data collection, information, and warning systems in the Western Region of the United States.
Arizona
- Arizona Game and Fish Department
- Arizona Statewide Flood Warning System
- City of Flagstaff
- Cochise County Flood Control District
- Rainfall Data, Maricopa County (Phoenix Metro Area)
- Gila County Flood Control District
- Greenlee County
- Mohave County Flood Control District
- Navajo County Flood Control District (Database Interrogation), Google Data Map
- Pima County Regional Flood Control District (Tucson Metro Area)
- Pinal County Flood Control District
- Santa Cruz County Flood Control District
- Yavapai County Flood Control District
California
- Los Angeles County Department of Public Works
- Marin County Flood Control and Water Conservation District (San Francisco Bay area)
- County of Orange, OC Public Works (Greater Los Angeles area)
- Monterey County
- Riverside County Flood Control District
- City of Roseville
- Sacramento County
- San Bernandino County
- San Diego County Flood Control District
- Santa Clara Valley Water District (San Francisco Bay area)
- Ventura County Watershed Protection District
Colorado
Kansas
Nevada
- Clark County Regional Flood Control District (Las Vegas Metro area)
Texas
- Austin, TX
- Bexar County (San Antonio), TX
- City of Dallas Flood Control District
- Harris County Flood Warning System (Houston Metro area)
- Lower Colorado River Authority
- Rice University TMC Flood Alert System
Washington
