Study unit (suid) -The name of the NAWQA study unit in which the site is located.
County
-The name of the county or county equivalent (parish, borough, etc.) in which
the site is located.
Hydrologic Unit Code (HUC) -Hydrologic units are geographic areas representing
part or all of a surface drainage basin or distinct hydrologic feature and are
delineated on the State Hydrologic Unit Maps. Each hydrologic unit is
identified by a unique number (HUC), and a name. Additional information is available
at http://water.usgs.gov/GIS/huc.html
Site type -The type of hydrologic information found at the site.
Surface Water-Water flow and levels in streams, lakes
and springs.
Lake Station-Water surface elevation or content of
lakes, reservoirs, etc..
Estuary-An arm or inlet of the sea at the lower end
of a river.
Spring-Cross between surface water and a ground water
site.
Ground Water-Water levels in wells.
Meteorological-Weather information such as precipitation
amount, air temperature, etc.
Ground-water site type -The code indicating the type of site to which
these data apply. The codes and their meanings are available.
Land Use - The type of general land use in the stream basin where the site is located (or within a specified
radius of a well or spring)
Lab Schedule - Parameter groupings are major categories of water quality
data types.
Filter to see only Detects - Retrieve samples with values that exceed the laboratory minimum reporting level (MRL)
Minimum Value - A user-specifed level.
Dissolved
- Refers to constituents that exist in true chemical solution in a water sample;
as a convenient operational definition
used by agencies that collect water data, the term "dissolved" commonly
is used to refer to constituents in a representative water
sample passed through a 0.45-micrometer filter membrane for inorganic analysis
or a 0.7-micrometer glass fiber filter for organic analysis.
Filtered - Pertains to constituents in a water sample passed through
a filter membrane of specified pore diameter, most commonly
0.45 micrometer or less for inorganic analytes and 0.7 micrometer for organic
analytes.
Total - Pertains to the constituents in an unfiltered, representative
water-suspended-sediment sample. This term is used only when the
analytical procedure ensures measurement of at least 95 percent of the constituent
present in both the dissolved and suspended phases of the sample. Knowledge
of the expected form of the constituent in the sample, as well as of the analytical
methodology used, is required to judge when the results should be reported as
"total." (Note that the word "total" does double duty here,
indicating that the sample
consists of a water-suspended-sediment mixture and that the analytical method
determines all of the constituents in the sample.)
NODC (National Oceanographic Data Center) code - taxonomic code based
on the Linnean system of biological nomenclature