updated September 30, 2013

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updated October 1, 2013

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updated October 1, 2013

The U.S. Geological Survey WaterAlert service sends e-mail or text (SMS) messages when certain parameters, as measured by a USGS real-time data-collection station, exceed user-definable thresholds. The development and maintenance of the WaterAlert system is supported by the USGS and its partners, including numerous federal, state, and local agencies.

Real-time data from USGS gages are transmitted via satellite or other telemetry to USGS offices at various intervals; in most cases, once every hour. Emergency transmissions, such as during floods, may be more frequent. Notifications will be based on the data received at these site-dependent intervals.

updated October 1, 2013

Basic instructions:
  1. Select Location: Zoom the map into your region of interest or use the Select Location in section below.
  2. Select Data Type in section below.
  3. Select site using the cursor.
  4. Select Subscribe to WaterAlert.
Get detailed instructions.

Managing subscription(s):

Send WaterAlert Help for...

 Get my alert information.

updated September 30, 2013

USGS WaterNow
The USGS WaterNow service lets you send a query for a USGS gaging site, via email or cell-phone text message, and quickly receive a reply with its most recent data for one or more of its monitored parameters.

USGS National Water Information System Mapper
The National Water Information System (NWIS) provides access to data at over 1.5 million sites. There are 56 possible site types, including 14 primary and 42 secondary types. Sites may be active or inactive, real-time or historical.

USGS Flood Inundation Mapper
Ths mapping tool shows digital, geospatial, flood-inundation maps of flood water extent and depth on the land surface, with current site conditions.

Click Map and Drag Box to Zoom In
Click Map and Drag Box to Zoom Out
Click Map and Drag to Pan
Click Button to Zoom to Previous Map Extent
Click Button to Zoom to Initial Map Extent
Click Button to Zoom to Next Map Extent
Refresh Map
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