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Show * l 34 Water Quality in the Great Salt Lake Basins Study- unit frequency of detection, in percent National frequency of detection, in percent 1 1 Study- unit sample size I 1 Dissolved ammonia plus organic nitrogen, as N 100 86 99 86 98 76 33 90 39 34 33 100 94 100 98 98 95 82 97 76 85 72 100 96 89 94 100 92 *• • ••••••• Dissolved nitrite plus nitrate ** Total phosphorus, as P * ** 1 29 70 95 0 30 50 29 70 95 0 30 55 29 70 95 Study- unit frequency of detection, in percent National frequency of detection, in percent I I 1 1 1 1 J_ Radon- 222 -- 991 100 100 100 98 Study- unit sample size 4MBNW 1 30 514 0.001 0.01 0.1 1 10 100 1,000 10,000 100,0001,000,000 CONCENTRATION, IN PICOCURIES PER LITER Other trace elements detected Antimony Lead Selenium Trace elements not detected Beryllium Silver 0.01 0.1 1 10 CONCENTRATION, IN MILLIGRAMS PER LITER Trace elements in ground water Study- unit frequency of detection, in percent National frequency of detection, in percent 1 Study- unit sample size " 1 1 1 __ J_ Arsenic •- 58 f 30 48> 39 48; 77 37 Manganese * 83 84 61 • M • • • ••• Molybdenum 1 0 30 54 0 30 51 CHEMICALS IN FISH TISSUE AND BED SEDIMENT Concentrations and detection frequencies, Great Salt Lake Basins, 1999- 2001- Study- unit frequencies of detection are based on small sample sizes; the applicable sample size is specified in each graph • Detected concentration in Study Unit 66 38 Frequencies of detection, in percent. Detection frequencies were not censored at any common reporting limit. The left- hand column is the study- unit frequency and the right- hand column is the national frequency Not measured or sample size less than two 12 Study- unit sample size National ranges of concentrations detected, by land use, in 51 NAWQA Study Units, 1991- 2001- Ranges include only samples in which a chemical was detected Fish tissue from streams in agricultural areas Fish tissue from streams in urban areas Fish tissue from streams draining mixed land uses Sediment from streams in agricultural areas Sediment from streams in urban areas •. Sediment from streams draining mixed land uses Lowest Middle Highest 25 50 25 -:" t'.'; percent percent percent 93 57 97 76 71 54 50 *>* ™ -* i: myjjjt; m** rm M Uranium 60 47 45 ••',"• : -- W 0 30 54 0 30 54 National benchmarks for fish tissue and bed sediment National benchmarks include standards and guidelines related to criteria for protection of the health of fish- eating wildlife and aquatic organisms. Sources include the U. S. Environmental Protection Agency, other Federal and State agencies, and the Canadian Council of Ministers of the Environment. I Protection of fish- eating wildlife ( applies to fish tissue) I Protection of aquatic life ( applies to bed sediment) * No benchmark for protection of fish- eating wildlife ** No benchmark for protection of aquatic life 0.01 0.1 1 10 100 1,000 10,000 100,0001,000,000 CONCENTRATION, IN MICROGRAMS PER LITER |
