Concentrations and annual fluxes for selected water-quality constituents from the USGS National Stream Quality Accounting Network (NASQAN), 1996-2000

By Valerie J. Kelly, Richard P. Hooper, Brent T. Aulenbach, and Mary Janet

Yield Maps

Download instructions || Runoff, major ions and nutrients || Trace elements || Pesticides || Sediment chemistry

Sub-basin yield maps based on mean annual fluxes for water years 1997-2000 can be accessed from the following list. Data tables containing the yields are organized according to constituent group, and can be downloaded by clicking on the heading for the particular group. Where data were not available because the constituent was not sampled at a particular station, or because data were insufficient to generate a model, the yield is missing and the sub-basin is marked with a hatch.

Runoff, major ions, nutrients, and suspended sediment

• Water, as runoff
• Carbonate, filtered (as CO3)
• Bicarbonate, filtered (as HCO3)
• Alkalinity, filtered (as CaCO3)
• Ammonium-nitrogen (as N)
• Nitrite-nitrogen (as N)
• Ammonium-plus-organic-nitrogen, dissolved (as N)
• Ammonium-plus-organic-nitrogen (as N)
• Nitrite-plus-nitrate-nitrogen, dissolved (as N)
• Phosphorus, total
• Phosphorus, dissolved
• Orthophosphate-phosphorus (as P)
• Calcium, dissolved
• Magnesium, dissolved
• Sodium, dissolved
• Potassium, dissolved
• Chloride, dissolved
• Sulfate, dissolved
• Fluoride, dissolved
• Silica, dissolved
• Total Dissolved Solids (Residue on evaporation) ()
• Sediment, suspended

Trace elements

• Arsenic, dissolved
• Barium, dissolved
• Beryllium, dissolved
• Boron, dissolved
• Cadmium, dissolved
• Chromium, dissolved
• Cobalt, dissolved
• Copper, dissolved
• Iron, dissolved
• Lead, dissolved
• Manganese, dissolved
• Molybdenum, dissolved
• Nickel, dissolved
• Silver, dissolved
• Strontium, dissolved
• Vanadium, dissolved
• Antimony, dissolved
• Aluminum, dissolved
• Lithium, dissolved
• Selenium, dissolved
• Uranium, natural, dissolved

Pesticides

• Propachlor
• Butylate
• Simazine
• Prometon
• Desethyl atrazine
• Cyanazine
• Fonofos
• Alpha HCH
• P,P' DDE
• Chlorpyrifos
• Gamma HCH (Lindane)
• Dieldrin
• Metolachlor
• Malathion
• Parathion
• Diazinon
• Atrazine
• Alachlor
• Acetochlor
• Metribuzin
• Diethylanilene
• Trifluralin
• Ethalfluralin
• Phorate
• Terbacil
• Linuron
• Methyl parathion
• EPTC
• Pebulate
• Tebuthiuron
• Molinate
• Ethoprop
• Benfluralin
• Carbofuran
• Terbufos
• Pronamide
• Disulfoton
• Triallate
• Propanil
• Carbaryl
• Thiobencarb
• Dachthal DCPA
• Pendimethalin
• Napropamide
• Propargite
• Azinphos-methyl
• Permethrin

Suspended sediment chemistry

• Antimony, sediment, suspended, total
• Arsenic, sediment, suspended, total
• Barium, sediment, suspended, total
• Beryllium, sediment, suspended, total
• Cadmium, sediment, suspended, total
• Chromium, sediment, suspended, total
• Copper, sediment, suspended, total
• Lead, sediment, suspended, total
• Manganese, sediment, suspended, total
• Mercury, sediment, suspended, total
• Molybdenum, sediment, suspended, total
• Nickel, sediment, suspended, total
• Selenium, sediment, suspended, total
• Silver, sediment, suspended, total
• Vanadium, sediment, suspended, total
• Zinc, sediment, suspended, total
• Aluminum, sediment, suspended, total
• Carbon, sediment, suspended, total
• Iron, sediment, suspended, total
• Phosphorus, sediment, suspended, total
• Sulfur, sediment, suspended
• Titanium, sediment, suspended, total
• Cobalt, sediment, suspended, total
• Strontium, sediment, suspended, total
• Uranium, sediment, suspended, total
• Lithium, sediment, suspended, total
• Thallium, sediment, suspended, total
• Carbon, organic, suspended, total

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