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 30,500 65,900 117,000 209,000 427,000 801,000 1,210,000 Cubic meters per second 1,827 864 1,866 3,313 5,918 12,091 22,682 34,264
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) 61 0.3 5.2 11.0 16.9 26.5 29.0 31.5 00076 Turbidity (NTU) 62 3.8 5.2 10.0 25.0 49.0 99.0 170.0 00095 Conductance (uS/cm) 61 187.0 235.0 259.0 290.0 316.0 367.0 442.0 00300 Dissolved oxygen 56 5.7 5.8 7.3 8.9 10.4 12.6 13.8 00400 pH (standard units) 60 7.1 7.2 7.4 7.5 7.7 7.9 8.1 00453 HCO3 (filtered) 57 59.0 76.0 85.0 91.0 100.0 110.0 117.0 39086 Alk (filtered, as CaCO3) 58 48.0 62.0 69.0 74.5 81.0 90.0 96.0 70331 % finer than 62 microns 60 83.1 85.3 92.4 96.0 98.2 99.4 99.8 80154 Suspended sediment 61 3.0 11.0 23.0 59.0 110.0 193.7 381.0
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 62 65 < 0.020 < 0.020 < 0.020 0.026 0.050 0.091 0.159
00613 NO2-N .010 62 95 < 0.010 0.010 0.013 0.018 0.024 0.043 0.089
00623 Org+NH3-N (filtered) .200 62 84 < 0.200 < 0.200 0.200 0.232 0.300 0.337 0.411
00625 Org+NH3-N (whole-water) .200 62 100 0.255 0.300 0.400 0.461 0.600 0.800 1.402
00631 NO2+NO3-N .050 62 100 0.201 0.446 0.891 1.202 1.460 2.156 2.465
00665 Total P (whole-water) .010 62 100 0.033 0.050 0.078 0.119 0.180 0.340 0.549
00666 Total P (filtered) .010 62 92 < 0.010 < 0.010 0.024 0.034 0.042 0.065 0.070
00671 PO4-P .010 62 100 0.009 0.015 0.023 0.034 0.043 0.054 0.242
00681 DOC .300 61 100 2.200 2.300 2.563 2.900 3.200 3.700 4.332
00689 SOC .200 60 100 0.200 0.300 0.600 0.900 1.365 2.500 4.900
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 20.56 26.17 29.96 32.90 35.01 38.13 43.00
00925 Magnesium .010 62 100 4.500 6.022 7.231 8.104 9.544 11.06 12.51
00930 Sodium .200 62 100 5.300 6.927 8.715 10.97 13.70 19.00 34.44
00935 Potassium .010 62 100 1.760 1.900 2.090 2.330 2.650 3.000 3.850
00940 Chloride .010 62 100 7.600 9.282 11.06 13.63 16.35 21.96 40.32
00945 Sulfate .010 62 100 21.00 24.04 31.11 36.56 43.30 56.18 82.08
00950 Fluoride .100 62 90 < 0.100 < 0.100 0.108 0.129 0.155 0.200 0.241
00955 Silica .010 62 100 0.765 1.860 3.526 4.486 5.132 5.500 5.900
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 31 < 2.0 < 2.0 < 2.0 < 2.0 1.2 2.0 2.0
01005 Barium 1.0 47 100 23.0 24.6 29.0 30.9 33.0 38.2 40.9
01010 Beryllium 10.0 47 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01020 Boron 16.0 59 98 < 16.0 20.0 28.4 35.4 42.8 63.0 82.9
01025 Cadmium 1.0 47 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 5.0 47 43 < 5.0 < 5.0 < 5.0 < 5.0 1.3 2.1 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 47 89 < 1.0 < 1.0 1.1 1.4 1.9 2.0 2.1
01046 Iron 10.0 62 53 < 10.0 < 10.0 < 10.0 10.0 12.2 24.0 35.0
01049 Lead 1.0 47 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 47 60 < 1.0 < 1.0 < 1.0 1.4 2.5 8.0 25.0
01060 Molybdenum 10.0 47 87 < 10.0 < 10.0 1.1 1.6 2.3 3.0 10.0
01065 Nickel 1.0 47 70 < 1.0 < 1.0 < 1.0 1.2 1.6 2.0 2.0
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 83.0 105.9 126.1 140.0 157.2 199.4 221.2
01085 Vanadium 10.0 62 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01090 Zinc 10.0 47 83 < 10.0 < 10.0 1.0 2.0 3.0 7.6 10.0
01095 Antimony 1.0 46 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 10.0 47 98 < 10.0 3.2 5.2 6.4 7.9 11.0 11.1
01130 Lithium 6.0 62 42 < 6.0 < 6.0 < 6.0 < 6.0 5.1 6.9 7.7
01145 Selenium 2.4 62 3 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4
22703 Uranium 1.0 46 0 < 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 59 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 59 7 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003 0.005
04035 Simazine .005 59 100 0.006 0.012 0.020 0.058 0.194 0.538 0.647
04037 Prometon .018 59 76 < 0.018 < 0.018 0.010 0.015 0.018 0.021 0.021
04040 Desethyl atrazine .002 59 100 0.006 0.008 0.022 0.043 0.095 0.310 0.362
04041 Cyanazine .010 59 95 < 0.010 < 0.010 0.012 0.029 0.127 0.712 1.260
04095 Fonofos .003 59 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 59 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 59 2 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .005 58 43 < 0.005 < 0.005 < 0.005 < 0.005 0.005 0.014 0.025
39341 gamma-HCH .004 59 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 59 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 59 100 0.018 0.020 0.035 0.113 0.453 2.140 3.190
39532 Malathion .005 59 2 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.005
39542 Parathion .004 59 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .004 59 41 < 0.004 < 0.004 < 0.004 < 0.004 0.004 0.008 0.010
39632 Atrazine .001 59 100 0.023 0.048 0.088 0.474 1.450 6.350 6.800
46342 Alachlor .010 59 59 < 0.010 < 0.010 < 0.010 0.006 0.014 0.114 0.286
49260 Acetochlor .002 59 80 < 0.002 < 0.002 0.004 0.016 0.127 0.635 0.816
82630 Metribuzin .004 59 44 < 0.004 < 0.004 < 0.004 < 0.004 0.018 0.039 0.110
82660 Diethylanaline .003 59 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 59 5 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.006
82663 Ethalfluralin .004 59 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 59 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 59 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .002 59 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.006
82667 Methyl parathion .006 59 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .002 59 5 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.008
82669 Pebulate .004 59 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .020 59 81 < 0.020 < 0.020 0.010 0.013 0.015 0.023 0.027
82671 Molinate .004 59 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 59 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 59 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .025 59 10 < 0.025 < 0.025 < 0.025 < 0.025 < 0.025 0.030 0.050
82675 Terbufos .013 59 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 59 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 59 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .004 59 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82679 Propanil .004 59 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 59 14 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.004 0.012
82681 Thiobencarb .002 59 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 59 7 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.003
82683 Pendimethalin .004 59 5 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.006 0.015
82684 Napropamide .003 59 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 58 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .001 59 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82687 Permethrin .005 59 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 59 100 53.43 78.20 96.33 100.0 109.0 127.9 175.0
91064 Terbuthylazin (%) .100 41 100 59.44 90.10 105.7 113.6 126.9 136.7 199.0
91065 HCH alpha-D6 (%) .100 59 100 54.17 74.18 89.64 98.57 105.5 127.4 180.0
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 45 100 0.90 0.90 1.00 1.10 1.50 7.20 9.60
29818 Arsenic (ppm) 0.10 45 100 9.00 9.60 12.00 13.40 15.00 16.60 20.70
29820 Barium (ppm) 1.00 45 100 400.0 420.0 470.0 500.0 530.0 600.0 640.0
29822 Beryllium (ppm) 0.10 45 100 1.30 1.50 1.90 2.10 2.40 2.80 2.90
29826 Cadmium (ppm) 0.10 45 100 0.30 0.40 0.60 0.70 0.80 1.10 1.20
29829 Chromium (ppm) 1.00 45 96 < 1.00 59.00 70.00 74.00 87.00 120.0 130.0
29832 Copper (ppm) 1.00 45 100 17.00 24.00 28.00 31.00 35.00 49.00 77.00
29836 Lead (ppm) 1.00 45 100 22.00 24.00 30.00 33.00 41.00 53.00 82.00
29839 Manganese (ppm) 10.0 45 100 1300 1400 1700 1900 2300 2800 3400
29841 Mercury (ppm) 0.01 42 93 < 0.01 < 0.01 0.06 0.08 0.10 0.12 0.70
29843 Molybdenum (ppm) 5.00 45 16 < 5.00 < 5.00 < 5.00 < 10.00 < 10.00 25.00 50.00
29845 Nickel (ppm) 1.00 45 96 < 1.00 22.00 47.00 54.00 62.00 77.00 90.00
29847 Selenium (ppm) 0.10 45 100 0.50 0.60 0.70 0.80 0.90 1.20 1.20
29850 Silver (ppm) 0.50 45 11 < 0.50 < 0.50 < 0.50 < 1.00 < 2.50 5.00 10.00
29853 Vanadium (ppm) 1.00 45 100 69.00 77.00 93.00 100.0 110.0 120.0 140.0
29855 Zinc (ppm) 1.00 45 100 130.0 140.0 170.0 190.0 210.0 260.0 350.0
30221 Aluminum (%) 0.10 45 100 4.90 5.40 6.30 7.00 7.60 8.70 9.00
30244 Total carbon (%) 0.10 44 95 < 0.10 1.90 2.60 2.85 3.20 4.50 5.50
30269 Iron (%) 0.10 45 100 2.60 3.00 3.60 3.90 4.10 4.70 4.80
30292 Phosphorus (%) 0.01 45 100 0.11 0.12 0.13 0.14 0.15 0.16 0.19
30308 Sulfur (%) 0.10 40 93 < 0.10 < 0.10 0.10 0.30 0.50 1.40 2.30
30317 Titanium (%) 0.01 45 100 0.30 0.40 0.40 0.46 0.50 0.51 0.60
35031 Cobalt (ppm) 1.00 45 100 14.00 15.00 18.00 20.00 23.00 30.00 35.00
35040 Strontium (ppm) 0.01 45 100 90.00 100.0 110.0 130.0 150.0 220.0 250.0
35046 Uranium (ppm) 50.0 45 0 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 250.0 < 500.0
35050 Lithium (ppm) 1.00 45 100 32.00 40.00 46.00 50.00 59.00 76.00 78.00
49955 Thallium (ppm) 50.0 45 0 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 250.0 < 500.0
50279 Sediment (mg/L) 1.00 45 100 5.60 16.00 36.00 63.00 126.0 206.0 376.0
50465 Organic carbon (%) 0.10 40 93 < 0.10 < 0.10 2.20 2.55 2.70 3.50 4.40
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