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 17,500 26,700 36,500 47,200 71,200 125,000 237,000 Cubic meters per second 1,827 496 756 1,034 1,337 2,016 3,540 6,711
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) 65 0.5 0.7 6.6 16.9 23.4 26.6 27.3 00076 Turbidity (NTU) 67 1.8 3.1 7.1 13.0 24.0 59.0 120.0 00095 Conductance (uS/cm) 66 227.0 288.0 362.0 387.5 420.0 461.0 478.0 00300 Dissolved oxygen 60 3.7 4.9 6.6 8.1 11.2 14.1 14.1 00400 pH (standard units) 65 6.8 7.3 7.6 7.8 8.1 8.5 8.9 00452 CO3 (filtered) 65 0.0 0.0 0.0 0.0 0.0 10.0 19.0 00453 HCO3 (filtered) 66 106.0 124.0 156.0 174.0 188.0 209.0 251.0 39086 Alk (filtered, as CaCO3) 65 87.0 102.0 134.0 143.0 156.0 176.0 206.0 70331 % finer than 62 microns 64 74.0 87.0 96.4 98.0 99.0 99.3 99.7 80154 Suspended sediment 64 11.0 15.0 35.5 51.0 85.0 227.0 281.0
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 .020 66 79 < 0.020 < 0.020 0.022 0.061 0.120 0.240 0.302
00613 NO2-N .010 66 95 < 0.010 0.010 0.020 0.025 0.042 0.101 0.180
00623 Org+NH3-N (filtered) .200 65 100 0.358 0.400 0.468 0.500 0.593 0.700 1.100
00625 Org+NH3-N (whole-water) .100 66 98 < 0.100 0.561 0.700 0.800 0.920 1.256 1.550
00631 NO2+NO3-N .050 66 100 0.180 0.310 1.011 1.600 1.997 3.313 3.879
00665 Total P (whole-water) .010 66 100 0.010 0.072 0.120 0.150 0.188 0.262 0.446
00666 Total P (filtered) .010 66 95 < 0.010 0.013 0.050 0.078 0.100 0.132 0.190
00671 PO4-P .001 66 97 < 0.001 0.002 0.035 0.064 0.099 0.121 0.141
00681 DOC .300 64 100 0.800 4.900 5.900 6.500 6.850 7.630 8.900
00689 SOC .200 60 98 0.400 0.500 0.800 1.212 1.850 4.450 > 10.00
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 67 100 25.00 29.49 37.00 40.00 43.02 47.86 50.66
00925 Magnesium .010 67 100 8.600 12.00 15.46 16.94 18.78 21.42 23.01
00930 Sodium .200 67 100 5.400 7.011 7.900 8.942 10.00 11.51 13.71
00935 Potassium .010 67 100 0.280 2.000 2.270 2.540 2.830 3.600 3.700
00940 Chloride .010 67 100 8.500 10.55 12.43 13.20 15.19 16.95 19.45
00945 Sulfate .010 67 100 15.53 18.00 21.20 24.00 32.80 46.24 58.63
00950 Fluoride .100 67 91 < 0.100 < 0.100 0.100 0.141 0.183 0.200 0.210
00955 Silica .010 67 100 0.082 1.007 5.000 8.626 10.86 12.00 15.04
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 66 42 < 2.0 < 2.0 < 2.0 < 2.0 1.6 2.0 2.1
01005 Barium 1.0 39 100 28.3 31.0 35.0 40.1 46.5 54.5 68.3
01010 Beryllium 1.0 38 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 66 100 16.1 18.1 20.0 25.1 29.4 33.9 42.8
01025 Cadmium 1.0 38 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 38 58 < 1.0 < 1.0 < 1.0 1.4 2.0 4.1 7.8
01035 Cobalt 3.0 39 0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0
01040 Copper 1.0 38 79 < 1.0 < 1.0 1.0 1.2 1.4 3.4 4.0
01046 Iron 10.0 67 75 < 10.0 < 10.0 < 10.0 12.9 46.6 150.0 190.0
01049 Lead 1.0 38 3 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.7
01056 Manganese 3.0 40 95 < 3.0 < 3.0 2.8 4.4 8.9 16.5 20.0
01060 Molybdenum 10.0 39 64 < 10.0 < 10.0 < 10.0 1.1 1.3 1.7 10.0
01065 Nickel 1.0 39 97 < 1.0 1.0 1.3 1.6 1.9 2.4 2.6
01075 Silver 1.0 39 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 67 100 55.0 65.0 78.0 85.0 100.5 117.5 121.1
01085 Vanadium 10.0 67 3 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0
01090 Zinc 1.0 38 92 < 1.0 < 1.0 2.1 2.9 5.1 30.8 46.6
01095 Antimony 1.0 38 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 10.0 39 92 < 10.0 < 10.0 1.7 2.8 4.0 15.0 18.0
01130 Lithium 6.0 67 85 < 6.0 < 6.0 4.0 5.6 7.7 9.3 11.0
01145 Selenium 2.4 67 6 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4 2.4
22703 Uranium 1.0 37 78 < 1.0 < 1.0 1.0 1.3 2.0 2.7 3.3
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 63 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 63 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .005 63 83 < 0.005 < 0.005 0.005 0.007 0.012 0.026 0.052
04037 Prometon .018 63 57 < 0.018 < 0.018 < 0.018 0.009 0.018 0.018 0.018
04040 Desethyl atrazine .002 63 100 0.010 0.013 0.023 0.032 0.053 0.104 0.153
04041 Cyanazine .020 63 76 < 0.020 < 0.020 0.007 0.013 0.050 0.123 0.235
04095 Fonofos .003 63 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 63 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 63 6 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.006
38933 Chlorpyrifos .004 63 16 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.005 0.011
39341 gamma-HCH .004 63 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 63 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 63 98 < 0.002 0.010 0.022 0.077 0.191 0.410 1.270
39532 Malathion .009 63 2 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 0.011
39542 Parathion .004 63 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .006 63 5 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
39632 Atrazine .001 63 100 0.029 0.035 0.047 0.085 0.386 0.934 2.440
46342 Alachlor .010 63 59 < 0.010 < 0.010 < 0.010 0.005 0.017 0.040 0.105
49260 Acetochlor .009 63 67 < 0.009 < 0.009 < 0.009 0.012 0.061 0.253 1.660
82630 Metribuzin .006 63 8 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.019
82660 Diethylanaline .003 63 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 63 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82663 Ethalfluralin .004 63 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 63 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .013 63 3 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 0.025
82666 Linuron .002 63 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 63 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .002 63 24 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.006 0.007
82669 Pebulate .004 63 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 63 16 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.010
82671 Molinate .004 63 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 63 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 63 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .003 63 14 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.025 0.059
82675 Terbufos .013 63 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 63 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 63 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .008 63 0 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008
82679 Propanil .004 63 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 63 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82681 Thiobencarb .002 63 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 63 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
82683 Pendimethalin .010 63 2 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010
82684 Napropamide .003 63 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 62 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .010 63 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82687 Permethrin .005 63 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 63 100 84.60 87.60 97.12 101.4 107.9 123.0 131.4
91064 Terbuthylazin (%) .100 46 100 96.26 100.0 105.0 110.5 121.1 134.6 146.7
91065 HCH alpha-D6 (%) .100 63 100 56.80 82.26 90.28 98.21 105.7 113.5 120.0
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 45 98 < 0.50 0.70 0.90 1.10 3.10 10.70 50.00
29818 Arsenic (ppm) 0.10 45 100 4.90 5.30 6.90 7.90 9.10 11.80 43.00
29820 Barium (ppm) 1.00 45 100 330.0 460.0 520.0 560.0 580.0 640.0 660.0
29822 Beryllium (ppm) 0.10 45 100 0.90 1.00 1.10 1.20 1.40 1.60 1.80
29826 Cadmium (ppm) 0.10 45 98 < 0.20 0.30 0.40 0.60 0.70 1.00 50.00
29829 Chromium (ppm) 1.00 45 98 < 1.00 48.00 56.00 63.00 74.00 120.0 260.0
29832 Copper (ppm) 1.00 45 100 13.00 16.00 19.00 21.00 23.00 28.00 83.00
29836 Lead (ppm) 1.00 45 98 < 19.00 23.00 27.00 31.00 37.00 49.00 500.0
29839 Manganese (ppm) 10.0 45 100 1100 1400 1700 2200 2500 2900 3800
29841 Mercury (ppm) 0.01 42 93 < 0.01 < 0.01 0.05 0.07 0.11 0.32 2.00
29843 Molybdenum (ppm) 5.00 45 4 < 4.00 < 5.00 < 5.00 < 10.00 < 25.00 < 25.00 25.00
29845 Nickel (ppm) 1.00 45 98 < 1.00 23.00 30.00 34.00 41.00 50.00 120.0
29847 Selenium (ppm) 0.10 45 98 < 0.40 0.70 0.80 1.10 1.20 1.50 50.00
29850 Silver (ppm) 0.50 45 2 < 0.50 < 0.50 < 0.50 < 1.00 < 2.50 < 5.00 250.0
29853 Vanadium (ppm) 1.00 45 100 56.00 63.00 70.00 78.00 89.00 110.0 130.0
29855 Zinc (ppm) 1.00 45 100 90.00 100.0 130.0 140.0 170.0 260.0 370.0
30221 Aluminum (%) 0.10 45 100 4.10 4.40 4.80 5.20 5.80 6.40 7.50
30244 Total carbon (%) 0.10 45 98 < 0.10 2.40 3.40 4.40 5.00 6.90 7.50
30269 Iron (%) 0.10 45 100 1.00 2.40 2.80 3.00 3.30 3.80 3.80
30292 Phosphorus (%) 0.01 45 100 0.10 0.11 0.12 0.14 0.16 0.26 0.32
30308 Sulfur (%) 0.10 40 88 < 0.10 < 0.10 0.20 0.40 0.55 0.95 3.70
30317 Titanium (%) 0.01 45 100 0.24 0.26 0.30 0.30 0.34 0.40 0.50
35031 Cobalt (ppm) 1.00 45 100 8.00 9.00 11.00 12.00 14.00 16.00 17.00
35040 Strontium (ppm) 0.01 45 100 100.0 120.0 130.0 140.0 160.0 220.0 380.0
35046 Uranium (ppm) 50.0 45 0 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 250.0 < 250.0
35050 Lithium (ppm) 1.00 45 100 3.00 22.00 25.00 29.00 32.00 37.00 44.00
49955 Thallium (ppm) 50.0 45 0 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 250.0 < 250.0
50279 Sediment (mg/L) 1.00 45 100 1.90 18.00 29.00 44.00 67.00 187.0 239.0
50465 Organic carbon (%) 0.10 36 97 < 0.10 0.60 2.80 3.45 4.10 5.50 7.40
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