By Valerie J. Kelly, Richard P. Hooper, Brent T. Aulenbach, and Mary Janet
Daily Mean Streamflow
Units N Min 5th 25th Median 75th 95th Max Cubic feet per second 1,827 99,400 139,000 194,000 275,000 360,000 510,000 864,000 Cubic meters per second 1,827 2,815 3,936 5,493 7,787 10,194 14,442 24,466
Field Parameters, Turbidity, and Suspended Sediment
Units in milligrams per liter, except where noted
Parameter N Min 5th 25th Median 75th 95th Max 00010 Temperature (C) 64 4.6 5.1 7.6 13.0 15.5 20.5 21.7 00076 Turbidity (NTU) 62 0.5 1.8 3.5 6.8 13.0 32.0 73.0 00095 Conductance (uS/cm) 64 89.7 99.3 111.7 125.4 136.5 159.0 183.0 00300 Dissolved oxygen 64 8.7 8.8 10.2 11.8 12.6 13.7 15.0 00400 pH (standard units) 64 7.2 7.5 7.7 7.8 7.9 8.1 8.1 00452 CO3 (filtered) 64 0.0 0.0 0.0 0.0 0.0 0.0 0.0 00453 HCO3 (filtered) 64 41.0 45.0 52.0 58.0 64.0 73.0 77.0 39086 Alk (filtered, as CaCO3) 64 34.0 37.0 42.5 48.0 52.5 60.0 63.0 70331 % finer than 62 microns 64 37.0 52.0 69.2 81.5 90.5 97.0 98.9 80154 Suspended sediment 64 5.0 9.0 14.0 27.0 50.0 94.0 323.0
Nutrients and Organic Carbon, dissolved (filtered at 0.45 microns) and whole-water (unfiltered)
Units in milligrams per liter
Note: because of changes in reporting levels (RL), all censored data in this summary are converted to the highest RL reported for this station
Percent
Parameter RL N Detections Min 5th 25th Median 75th 95th Max
00608 NH3-N .015 63 68 < 0.015 < 0.015 < 0.015 0.007 0.020 0.030 0.060
00613 NO2-N .010 63 81 < 0.010 < 0.010 0.002 0.004 0.008 0.010 0.020
00623 Org+NH3-N (filtered) .200 63 40 < 0.200 < 0.200 < 0.200 < 0.200 0.200 0.200 0.200
00625 Org+NH3-N (whole-water) .200 63 70 < 0.200 < 0.200 < 0.200 0.200 0.216 0.307 0.451
00631 NO2+NO3-N .050 63 100 0.030 0.054 0.102 0.200 0.402 0.540 0.736
00665 Total P (whole-water) .010 63 92 < 0.010 < 0.010 0.030 0.046 0.060 0.100 0.180
00666 Total P (filtered) .050 63 60 < 0.050 < 0.050 < 0.050 0.010 0.020 0.033 0.050
00671 PO4-P .010 63 100 0.001 0.003 0.007 0.011 0.018 0.025 0.043
00681 DOC .300 61 100 1.491 1.500 1.700 1.825 2.000 2.400 2.700
00689 SOC .200 60 100 0.200 0.200 0.400 0.500 0.750 2.150 4.817
Major Ions, dissolved (filtered at 0.45 microns)
Units in milligrams per liter, except where noted
Percent
Parameter RL N Detections Min 5th 25th Median 75th 95th Max
00915 Calcium .020 62 100 10.00 11.00 12.42 13.97 15.17 16.79 17.47
00925 Magnesium .010 62 100 2.899 3.000 3.373 3.794 4.273 4.948 5.500
00930 Sodium .200 62 100 3.486 3.989 4.617 5.200 6.070 7.161 11.00
00935 Potassium .100 62 98 < 0.100 0.840 0.970 1.010 1.170 1.340 1.800
00940 Chloride .010 62 100 1.724 2.000 2.770 3.225 4.020 5.100 7.420
00945 Sulfate .010 62 100 5.560 5.678 6.958 7.872 9.300 11.19 15.00
00950 Fluoride .100 62 69 < 0.100 < 0.100 < 0.100 0.100 0.124 0.158 0.200
00955 Silica .010 62 100 7.100 7.796 9.600 11.02 13.00 14.00 17.00
Trace Elements, dissolved (filtered at 0.45 microns)
Units in micrograms per liter
Note: because of changes in reporting levels (RL), all censored data in this summary are converted to the highest RL reported for this station
Percent
Parameter RL N Detections Min 5th 25th Median 75th 95th Max
01000 Arsenic 2.0 62 29 < 2.0 < 2.0 < 2.0 < 2.0 1.1 2.0 2.0
01005 Barium 1.0 47 100 11.3 12.0 15.0 18.0 20.5 22.3 23.0
01010 Beryllium 1.0 47 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 58 9 < 16.0 < 16.0 < 16.0 < 16.0 < 16.0 27.2 30.0
01025 Cadmium 1.0 47 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 5.0 46 24 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 2.0 5.0
01035 Cobalt 3.0 47 0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0
01040 Copper 1.0 46 80 < 1.0 < 1.0 1.0 1.2 1.6 2.0 2.8
01046 Iron 10.0 62 76 < 10.0 < 10.0 9.4 10.0 13.0 33.0 120.0
01049 Lead 1.0 47 2 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.0
01056 Manganese 1.0 47 64 < 1.0 < 1.0 < 1.0 1.4 3.0 5.8 12.0
01060 Molybdenum 10.0 47 2 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0
01065 Nickel 1.0 47 11 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.0 1.1
01075 Silver 1.0 47 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 62 100 54.7 60.3 65.6 74.3 82.1 91.0 98.4
01085 Vanadium 10.0 62 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01090 Zinc 3.0 46 67 < 3.0 < 3.0 < 3.0 1.3 2.0 3.0 3.8
01095 Antimony 1.0 46 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 1.0 47 100 2.5 2.9 3.7 5.3 10.4 77.0 161.0
01130 Lithium 6.0 62 26 < 6.0 < 6.0 < 6.0 < 6.0 4.0 6.0 6.0
01145 Selenium 2.4 62 2 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4
22703 Uranium 1.0 46 2 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.0
Pesticides, dissolved (filtered at 0.7 microns)
Units in micrograms per liter, except where noted
Note: concentrations sometimes are estimated below the reporting level (RL); in this summary, all censored and estimated concentrations are converted to highest RL reported for this station; the percent detections described in the table include estimated concentrations, when appropriate
Percent
Parameter RL N Detections Min 5th 25th Median 75th 95th Max
04024 Propachlor .007 64 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 64 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
04035 Simazine .007 64 61 < 0.007 < 0.007 < 0.007 0.005 0.006 0.016 0.034
04037 Prometon .018 64 6 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 0.018 0.018
04040 Desethyl atrazine .002 64 61 < 0.002 < 0.002 < 0.002 0.002 0.004 0.005 0.008
04041 Cyanazine .004 64 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
04095 Fonofos .003 64 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 64 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 64 3 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .004 64 14 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004 0.005
39341 gamma-HCH .004 64 2 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004
39381 Dieldrin .001 64 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 64 81 < 0.002 < 0.002 0.002 0.004 0.006 0.012 0.023
39532 Malathion .007 64 3 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 0.007
39542 Parathion .004 64 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 64 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
39632 Atrazine .005 64 83 < 0.005 < 0.005 0.003 0.005 0.012 0.028 0.078
46342 Alachlor .002 64 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
49260 Acetochlor .002 64 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82630 Metribuzin .004 64 19 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.011 0.025
82660 Diethylanaline .003 64 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .004 64 5 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.007
82663 Ethalfluralin .004 64 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 64 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .013 64 9 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 0.007 0.013
82666 Linuron .002 64 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 64 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .005 64 38 < 0.005 < 0.005 < 0.005 < 0.005 0.004 0.009 0.012
82669 Pebulate .004 64 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 64 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82671 Molinate .004 64 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 64 2 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.004
82673 Benfluralin .002 64 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .003 64 5 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.016
82675 Terbufos .013 64 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 64 17 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.007 0.016
82677 Disulfoton .017 64 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 64 19 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.006 0.011
82679 Propanil .004 64 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 64 5 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.005
82681 Thiobencarb .002 64 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 64 27 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.002 0.003
82683 Pendimethalin .004 64 2 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004
82684 Napropamide .003 64 3 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.006
82685 Propargite .013 64 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .010 64 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82687 Permethrin .005 64 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 64 100 50.68 77.90 92.70 99.08 105.2 113.8 145.5
91064 Terbuthylazin (%) .100 48 100 64.70 85.50 99.33 107.4 112.1 129.7 136.8
91065 HCH alpha-D6 (%) .100 64 100 60.10 73.80 89.34 95.37 100.7 117.9 125.2
Suspended Sediment Chemistry
Units in parts per million (ppm) or parts per hundred (%)
Values censored higher than the reporting level (RL) indicate samples with insufficient sediment mass to quantify concentration above the RL
Percent
Parameter RL N Detections Min 5th 25th Median 75th 95th Max
29816 Antimony (ppm) 0.10 51 100 0.50 0.60 0.90 1.00 1.30 2.00 2.70
29818 Arsenic (ppm) 0.10 51 100 4.10 4.90 6.40 7.50 8.40 10.30 10.60
29820 Barium (ppm) 1.00 51 100 430.0 440.0 500.0 550.0 590.0 630.0 670.0
29822 Beryllium (ppm) 0.10 51 100 1.20 1.30 1.40 1.50 1.60 1.70 2.00
29826 Cadmium (ppm) 0.10 51 98 < 0.10 0.20 0.50 0.80 1.00 1.30 1.50
29829 Chromium (ppm) 1.00 51 90 < 1.00 < 1.00 50.00 57.00 62.00 80.00 130.0
29832 Copper (ppm) 1.00 51 100 37.00 38.00 43.00 50.00 59.00 75.00 84.00
29836 Lead (ppm) 1.00 51 100 7.00 11.00 19.00 24.00 26.00 60.00 85.00
29839 Manganese (ppm) 10.0 51 100 840.0 860.0 1000 1100 1300 1500 1600
29841 Mercury (ppm) 0.01 49 98 < 0.01 0.03 0.06 0.07 0.10 0.16 0.30
29843 Molybdenum (ppm) 5.00 51 0 < 5.00 < 5.00 < 5.00 < 5.00 < 25.00 < 25.00 < 50.00
29845 Nickel (ppm) 1.00 51 90 < 1.00 < 1.00 32.00 36.00 39.00 57.00 65.00
29847 Selenium (ppm) 0.10 51 100 0.10 0.20 0.30 0.40 0.50 0.60 0.70
29850 Silver (ppm) 0.50 51 6 < 0.50 < 0.50 < 0.50 < 1.00 < 2.50 5.00 5.00
29853 Vanadium (ppm) 1.00 51 100 94.00 98.00 110.0 110.0 120.0 140.0 150.0
29855 Zinc (ppm) 1.00 51 100 100.0 110.0 140.0 180.0 190.0 220.0 340.0
30221 Aluminum (%) 0.10 50 100 6.20 6.30 7.20 7.65 8.50 9.00 9.50
30244 Total carbon (%) 0.10 50 94 < 0.10 < 0.10 1.70 2.35 3.20 4.70 5.80
30269 Iron (%) 0.10 51 100 3.70 3.90 4.10 4.30 4.60 5.10 5.60
30292 Phosphorus (%) 0.01 51 100 0.09 0.10 0.11 0.13 0.15 0.17 0.20
30308 Sulfur (%) 0.10 44 77 < 0.10 < 0.10 0.10 0.10 0.30 0.50 2.40
30317 Titanium (%) 0.01 50 100 0.40 0.44 0.50 0.50 0.51 0.60 0.70
35031 Cobalt (ppm) 1.00 51 100 15.00 15.00 17.00 18.00 19.00 21.00 22.00
35040 Strontium (ppm) 0.01 51 100 240.0 250.0 290.0 320.0 340.0 380.0 430.0
35046 Uranium (ppm) 50.0 51 0 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 250.0 < 500.0
35050 Lithium (ppm) 1.00 51 100 21.00 22.00 25.00 27.00 29.00 33.00 45.00
49955 Thallium (ppm) 50.0 51 0 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 250.0 < 500.0
50279 Sediment (mg/L) 1.00 51 100 7.00 8.00 16.00 28.00 46.00 180.0 353.0
50465 Organic carbon (%) 0.10 45 93 < 0.10 < 0.10 1.60 2.10 3.00 4.20 4.40
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