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

Percent Detection Maps

Download instructions || Major ions and nutrients || Trace elements || Pesticides || Sediment chemistry

Maps depicting percent detections for the period of NASQAN record, generally 1996-2000, can be accessed from the following list.

Major ions and nutrients

• Ammonia-nitrogen (as N)
• Nitrite-nitrogen (as N)
• Ammonia-plus-organic-nitrogen, dissolved (as N)
• Ammonia-plus-organic-nitrogen (as N)
• Nitrite-plus-nitrate-nitrogen, dissolved (as N)
• Phosphorus, total
• Phosphorus, dissolved
• Orthophosphate-phosphorus (as P)
• Carbon, organic, dissolved (as C)
• Calcium, dissolved
• Magnesium, dissolved
• Sodium, dissolved
• Potassium, dissolved
• Chloride, dissolved
• Sulfate, dissolved
• Fluoride, dissolved
• Silica, dissolved

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

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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