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USGS Water Resources		Data Category: Home Real-time Site Information Surface Water Ground Water Water Quality	Geographic Area: United States Alabama Alaska American Samoa Arizona Arkansas California Colorado Connecticut Delaware Dist. of Columbia Florida Georgia Guam Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Northern Mariana Islands Ohio Oklahoma Oregon Pennsylvania Puerto Rico Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virgin Islands Virginia Washington West Virginia Wisconsin Wyoming

USGS Real-Time Water Data for Virginia

• NOTICE: Water Temperature and Specific Conductance monitoring at 78 sites will be discontinued September 30, 2008. List of affected stations
• Additional information:
  • Annual Water Data Reports: Water Years 2002-07
  • Historical instantaneous flow data for Virginia: Instantaneous Data Archive - IDA
  • National Weather Service Advanced Hydrologic Prediction Service: River forecasts

Daily Streamflow Conditions Select a site to retrieve data and station information. Explanation High > 90th percentile 75th - 89th percentile 25th - 74th percentile 10th - 24th percentile < 10th percentile Low Not ranked The colored dots on this map depict streamflow conditions as a percentile, which is computed from the period of record for the current day of the year. Only stations with at least 30 years of record are used. The gray circles indicate other stations that were not ranked in percentiles either because they have fewer than 30 years of record or because they report parameters other than streamflow. Some stations, for example, measure stage only.

Statewide Streamflow Table Statewide Ground-Water Table Statewide Water-Quality Table Real-time data typically are recorded at 15-60 minute intervals, stored onsite, and then transmitted to USGS offices every 1 to 4 hours, depending on the data relay technique used. Recording and transmission times may be more frequent during critical events. Data from real-time sites are relayed to USGS offices via satellite, telephone, and/or radio and are available for viewing within minutes of arrival. All real-time data are provisional and subject to revision. Build Table Build a custom summary table for one or more stations. Build Sequence Build a custom sequence of graphical or tabular data for one or more stations.