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Briefing on High Levels of Nitrogen and Phosphorus Across the Nation

Briefing on High Levels of Nitrogen and Phosphorus Across the Nation

What: USGS will brief Congress, the media and the public on nutrient concentrations in the Nation’s water resources, key sources of nutrients, potential effects on humans and aquatic life, and changes in concentrations since the early 1990’s.

Why: A new nationwide USGS study shows excessive nutrient enrichment is widespread in streams, exceeding nutrient criteria recommended by the EPA in most agricultural and urban watersheds.

Who: Neil Dubrovsky; Chief, Nutrient National Synthesis, USGS
Bob Miltner; Aquatic Biologist, Ohio Environmental Protection Agency
Ephraim King; Director, USEPA Office of Science and Technology
Jeanette Brown; President-Elect of the Water Environment Federation and Executive Director of the Stamford Connecticut Water Pollution Control Authority

Where: Capitol Visitor’s Center, SVC-201/200, Washington, D.C.
The Capitol Visitor Center is on the east side of the U.S. Capitol Building. Once inside, follow signs to the Senate meeting rooms.” To facilitate quick entrance, please RSVP to Laura Parsons ( and tell security that you are on official business in SVC 201.

When: Friday, September 24, 2010
9:30 a.m.

Sponsors: Sen. Benjamin Cardin (D-Md.), Chair, Senate Environment & Public Works Subcommittee on Water and Wildlife
Sen. George Voinovich (R-Ohio), Senate Environment and Public Works Committee Environmental and Energy Study Institute
Water Environment Federation
USGS National Water-Quality Assessment Program

USGS Newsroom

More information

Parameter Value Description
Magnitude mb The magnitude for the event.
Longitude ° East Decimal degrees longitude. Negative values for western longitudes.
Latitude ° North Decimal degrees latitude. Negative values for southern latitudes.
Depth km Depth of the event in kilometers.
Place Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 1970-01-01 00:00:00 Time when the event occurred. UTC/GMT
Updated 1970-01-01 00:00:00 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status Indicates whether the event has been reviewed by a human.
Tsunami This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG A number describing how significant the event is. Larger numbers indicate a more significant event.
Network The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources A comma-separated list of network contributors.
Number of Stations Used The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type The method or algorithm used to calculate the preferred magnitude for the event.
Event Type Type of seismic event.
Event ID Id of event.
Event Code An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS A comma-separated list of event ids that are associated to an event.

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