March 2012

Instantaneous values (IVs) are periodic time-series measurement made by automated equipment in the field. IVs include gage height, streamflow, water temperature, depth of wells below land surface, as well as many other parameters.
With this release, instantaneous values are now supported from October 1, 2007 to the present. Previously, the limitation was that only the last 120 days of IVs were available for a site. Actual data availability will vary by site and parameter within a site depending on criteria established by the local USGS Water Science Center. In particular, data for some parameters will be limited to 30 days. Please see the IV Data Availability Statement for more information.
Instantaneous data will appear in tables, graphs, and tabular output (RDB) within the USGS Water Data for the Nation site (waterdata.usgs.gov). Data will also appear within the instantaneous values web service on the USGS Water Services site (waterservices.usgs.gov).
This is part one of a two part project. Part two, which is expected by October 1, 2013, will further expand the period of availability back to the beginning of the period of electronic IV data storage (roughly the mid to late 1980s).

Addition of new parameter code 72216 - Location of salt front in river miles upstream from mouth, mile.
Changed current parameter code 99122 to mg/L - Orthophosphate, water, filtered, field, milligrams per liter
Fahrenheit secondary axis for parameters measured in Celsius. The following parameters listed below are measured in Fahrenheit and have a related Celsius equivalent parameter. There are several other parameters measured in Fahrenheit , but these do not an equivalent Celsius parameter such as 62846 for Soil temperature, degrees Fahrenheit.

00011 Temperature, water, degrees Fahrenheit #
00010 Temperature, water, degrees Celsius
00021 Temperature, air, degrees Fahrenheit
00020 Temperature, air, degrees Celsius
30205 Temperature, wood (fire potential), degrees Fahrenheit
30206 Temperature, wood (fire potential), degrees Celsius
45588 Temperature, internal, within data collection platform, degrees Fahrenheit
45587 Temperature, internal, within data collection platform, degrees Celsius
45590 Temperature, internal, within equipment shelter, degrees Fahrenheit
45589 Temperature, internal, within equipment shelter, degrees Celsius

New Site service features. The Site service offers three important new minor filters:

Ability to search by USGS parameter code (parameterCd). For example, you could find all sites that serve water temperature data in degrees Celsius using the argument &parameterCd=00010.
Ability to search by data collection start date, end data or a period of time from now. Sites selected will include sites where any data were collected during a date range that you specify.
Ability to locate sites by national aquifer or local aquifer.

Expanded period of data available for Instantaneous Values service. The Instantaneous Values web service now allows data to be selected from October 1, 2007 to the present. Previously, the limitation was that only the last 120 days of IVs were available for a site. This complements similar functionality also available on the USGS Water Data for the Nation site (waterdata.usgs.gov).
Allows searches by site status (active, inactive, all), site altitude and drainage area.
Current condition groundwater sites can be queried based on well depth, hole depth, national aquifer code and local aquifer code.

The Daily Values web service allows retrieval by national aquifer code and local aquifer code.

There is a new Site service example demonstrating integration of the Site service with Google Maps. (Note: Google Maps is a commercial product and may require a license for use.)

Due to inconsistent results, time zones for date arguments (startDt and endDt) can no longer be used for any web services.