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 2,000 4,880 7,440 9,140 14,500 40,000 84,900 Cubic meters per second 1,827 57 138 211 259 411 1,133 2,404
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 0.0 0.0 8.0 16.0 20.0 23.5 24.5 00076 Turbidity (NTU) 54 2.8 3.9 33.0 65.0 170.0 335.0 1560.0 00095 Conductance (uS/cm) 65 237.0 289.0 413.0 614.0 718.0 893.0 1009.0 00300 Dissolved oxygen 64 6.3 7.4 8.0 8.6 10.3 12.9 15.0 00400 pH (standard units) 65 7.5 7.8 8.2 8.4 8.5 8.7 8.8 00452 CO3 (filtered) 60 0.0 0.0 0.0 2.0 6.0 10.0 12.0 00453 HCO3 (filtered) 64 84.9 95.0 111.5 157.5 192.0 210.0 231.0 39086 Alk (filtered, as CaCO3) 64 69.6 78.0 99.0 137.0 162.5 177.0 189.0 70331 % finer than 62 microns 52 11.0 48.0 68.8 77.5 93.0 99.0 99.4 80154 Suspended sediment 65 10.0 15.0 103.0 255.0 543.0 1790.0 4070.0
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 65 63 < 0.020 < 0.020 < 0.020 0.019 0.028 0.077 0.180
00613 NO2-N .010 65 46 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.012 0.020
00623 Org+NH3-N (filtered) .200 65 78 < 0.200 < 0.200 0.159 0.200 0.216 0.289 0.600
00625 Org+NH3-N (whole-water) .200 65 100 0.145 0.223 0.331 0.481 0.752 1.849 3.850
00631 NO2+NO3-N .050 65 77 < 0.050 < 0.050 0.050 0.168 0.286 0.425 0.604
00665 Total P (whole-water) .050 65 97 < 0.050 0.013 0.068 0.130 0.269 1.355 1.850
00666 Total P (filtered) .050 65 54 < 0.050 < 0.050 < 0.050 0.010 0.010 0.020 0.050
00671 PO4-P .010 65 66 < 0.010 < 0.010 < 0.010 0.010 0.013 0.030 0.032
00681 DOC .300 62 100 2.100 2.500 2.733 3.036 3.400 4.100 8.400
00689 SOC .200 63 98 0.200 0.300 0.800 2.000 3.735 9.200 > 20.00
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 64 100 20.27 25.23 32.45 45.81 57.90 66.67 70.17
00925 Magnesium .010 64 100 6.841 8.536 11.48 18.08 22.67 28.07 31.23
00930 Sodium .200 64 100 15.91 20.48 31.47 51.06 61.59 85.75 96.93
00935 Potassium .010 64 100 0.770 1.780 2.390 3.255 3.730 4.190 6.090
00940 Chloride .010 64 100 2.900 3.230 5.169 8.055 11.23 14.19 16.05
00945 Sulfate .010 64 100 40.87 56.96 91.44 150.8 194.1 275.0 339.2
00950 Fluoride .100 64 100 0.100 0.221 0.283 0.396 0.443 0.500 0.572
00955 Silica .010 64 100 4.488 6.796 8.393 9.973 10.72 11.96 12.19
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 1.0 60 100 2.0 2.2 3.5 4.0 4.7 5.9 6.4
01005 Barium 1.0 51 100 27.2 29.8 37.0 44.5 50.0 55.0 59.7
01010 Beryllium 1.0 51 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 54 100 46.5 48.6 72.8 112.8 136.3 163.5 172.7
01025 Cadmium 1.0 51 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 51 49 < 1.0 < 1.0 < 1.0 < 1.0 2.0 4.1 9.1
01035 Cobalt 1.0 51 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01040 Copper 1.0 51 96 < 1.0 1.0 1.6 2.0 2.4 3.2 4.0
01046 Iron 10.0 63 16 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0 29.0
01049 Lead 1.0 51 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 3.0 55 60 < 3.0 < 3.0 < 3.0 1.4 3.3 9.5 10.0
01060 Molybdenum 1.0 51 96 < 1.0 1.0 1.4 1.8 2.0 2.4 2.6
01065 Nickel 1.0 51 80 < 1.0 < 1.0 1.0 1.3 2.0 3.0 5.4
01075 Silver 1.0 51 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 54 100 184.1 220.0 299.5 440.0 585.2 731.9 745.7
01085 Vanadium 10.0 54 7 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0 10.0
01090 Zinc 1.0 50 40 < 1.0 < 1.0 < 1.0 < 1.0 1.2 3.1 5.5
01095 Antimony 1.0 51 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 1.0 51 92 < 1.0 < 1.0 1.6 3.2 5.9 14.3 16.0
01130 Lithium 4.0 54 100 11.0 14.2 21.0 31.0 38.1 46.6 47.6
01145 Selenium 2.4 60 40 < 2.4 < 2.4 < 2.4 < 2.4 1.3 2.4 2.4
22703 Uranium 1.0 51 100 1.0 1.3 2.0 3.0 4.1 4.8 5.1
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 62 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 62 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .005 62 6 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.005 0.014
04037 Prometon .018 62 23 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 0.018 0.018
04040 Desethyl atrazine .004 63 48 < 0.004 < 0.004 < 0.004 < 0.004 0.003 0.005 0.098
04041 Cyanazine .004 62 26 < 0.004 < 0.004 < 0.004 < 0.004 0.004 0.014 0.035
04095 Fonofos .003 62 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 62 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 62 5 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .004 62 8 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004 0.004
39341 gamma-HCH .004 62 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 62 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 62 58 < 0.002 < 0.002 < 0.002 0.002 0.005 0.009 0.015
39532 Malathion .008 62 2 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 0.008
39542 Parathion .004 62 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 62 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
39632 Atrazine .009 63 81 < 0.009 < 0.009 0.004 0.006 0.006 0.019 0.177
46342 Alachlor .004 62 10 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004 0.056
49260 Acetochlor .002 62 8 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.008 0.016
82630 Metribuzin .004 62 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82660 Diethylanaline .003 62 2 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.006
82661 Trifluralin .002 62 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82663 Ethalfluralin .004 62 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 62 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 62 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .002 62 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 62 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .070 62 18 < 0.070 < 0.070 < 0.070 < 0.070 < 0.070 0.010 0.070
82669 Pebulate .004 62 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 63 14 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.222
82671 Molinate .004 62 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 62 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 62 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .030 62 6 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030 0.008 0.030
82675 Terbufos .013 62 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 62 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 62 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .005 62 39 < 0.005 < 0.005 < 0.005 < 0.005 0.003 0.006 0.008
82679 Propanil .004 62 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 62 3 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.005
82681 Thiobencarb .002 62 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 62 6 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.002
82683 Pendimethalin .004 62 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .020 62 0 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020
82685 Propargite .020 56 0 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020
82686 Azinphos methyl .001 62 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82687 Permethrin .005 62 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 62 100 71.70 85.40 95.92 101.3 107.7 121.6 135.1
91064 Terbuthylazin (%) .100 37 100 88.44 92.95 103.6 110.2 119.1 129.4 129.6
91065 HCH alpha-D6 (%) .100 62 100 57.70 79.43 90.71 98.18 101.9 114.2 117.4
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 35 100 0.70 0.80 1.00 1.20 2.70 9.30 11.10
29818 Arsenic (ppm) 0.10 35 100 8.90 9.30 10.60 11.80 13.20 15.90 19.60
29820 Barium (ppm) 1.00 35 100 200.0 430.0 590.0 660.0 710.0 800.0 830.0
29822 Beryllium (ppm) 0.10 35 100 1.00 1.20 1.30 1.50 1.80 2.20 2.30
29826 Cadmium (ppm) 0.10 35 97 < 0.10 0.20 0.20 0.30 0.40 0.60 0.80
29829 Chromium (ppm) 1.00 35 100 49.00 59.00 64.00 69.00 82.00 110.0 150.0
29832 Copper (ppm) 1.00 35 100 12.00 14.00 19.00 21.00 25.00 36.00 36.00
29836 Lead (ppm) 1.00 35 100 14.00 14.00 16.00 18.00 21.00 24.00 32.00
29839 Manganese (ppm) 10.0 35 100 390.0 400.0 460.0 520.0 590.0 760.0 850.0
29841 Mercury (ppm) 0.01 35 91 < 0.01 < 0.01 0.02 0.04 0.05 0.07 0.08
29843 Molybdenum (ppm) 5.00 35 6 < 1.00 < 5.00 < 5.00 < 5.00 < 10.00 25.00 25.00
29845 Nickel (ppm) 1.00 35 100 25.00 27.00 32.00 36.00 42.00 93.00 120.0
29847 Selenium (ppm) 0.10 35 100 0.30 0.30 0.50 0.50 0.70 1.00 1.10
29850 Silver (ppm) 0.50 35 3 < 0.50 < 0.50 < 0.50 < 0.50 < 1.00 < 2.50 2.50
29853 Vanadium (ppm) 1.00 35 100 61.00 65.00 84.00 94.00 120.0 150.0 150.0
29855 Zinc (ppm) 1.00 35 100 70.00 70.00 70.00 80.00 100.0 120.0 130.0
30221 Aluminum (%) 0.10 35 100 4.00 4.70 5.50 6.20 6.70 9.30 9.90
30244 Total carbon (%) 0.10 35 100 1.00 1.00 1.50 1.70 2.00 3.10 3.20
30269 Iron (%) 0.10 35 100 2.00 2.10 2.40 2.80 3.20 3.60 3.80
30292 Phosphorus (%) 0.01 35 100 0.06 0.06 0.07 0.07 0.08 0.09 0.10
30308 Sulfur (%) 0.10 31 97 < 0.10 0.10 0.20 0.50 0.90 1.70 2.00
30317 Titanium (%) 0.01 34 100 0.20 0.21 0.28 0.30 0.30 0.40 0.44
35031 Cobalt (ppm) 1.00 35 100 8.00 8.00 9.00 11.00 12.00 15.00 19.00
35040 Strontium (ppm) 0.01 35 100 180.0 180.0 240.0 260.0 270.0 410.0 430.0
35046 Uranium (ppm) 50.0 35 0 < 50.00 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0
35050 Lithium (ppm) 1.00 35 100 19.00 23.00 28.00 34.00 42.00 54.00 57.00
49955 Thallium (ppm) 50.0 35 0 < 50.00 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0
50279 Sediment (mg/L) 1.00 35 100 1.00 41.00 181.0 274.0 503.0 1199 1743
50465 Organic carbon (%) 0.10 34 100 0.40 0.80 1.00 1.20 1.40 2.20 2.80
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