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 1,240 3,310 6,770 8,200 10,700 20,900 50,500 Cubic meters per second 1,827 35 94 192 232 303 592 1,430
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) 69 0.0 0.2 7.0 15.5 22.0 25.5 27.5 00076 Turbidity (NTU) 64 0.4 22.0 34.0 66.5 265.0 780.0 1000.0 00095 Conductance (uS/cm) 69 220.0 418.0 502.0 568.0 646.0 770.0 1245.0 00300 Dissolved oxygen 68 3.6 4.9 7.7 9.5 11.2 13.9 14.7 00400 pH (standard units) 69 7.1 7.4 7.8 8.1 8.4 8.7 9.0 00452 CO3 (filtered) 63 0.0 0.0 0.0 0.0 0.0 16.0 29.0 00453 HCO3 (filtered) 63 101.0 122.0 162.0 194.0 227.0 257.0 312.0 39086 Alk (filtered, as CaCO3) 64 83.0 110.0 140.0 164.0 191.0 211.0 256.0 70331 % finer than 62 microns 67 9.0 17.0 37.0 57.0 77.0 89.0 96.0 80154 Suspended sediment 67 24.0 237.0 505.0 950.0 2330.0 5020.0 8020.0
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 69 62 < 0.020 < 0.020 < 0.020 0.043 0.117 0.261 0.610
00613 NO2-N .010 69 84 < 0.010 < 0.010 0.011 0.020 0.040 0.106 0.140
00623 Org+NH3-N (filtered) .200 69 100 0.200 0.222 0.295 0.369 0.597 0.999 1.500
00625 Org+NH3-N (whole-water) .100 68 99 < 0.100 0.470 0.894 1.710 2.975 6.100 9.025
00631 NO2+NO3-N .050 69 90 < 0.050 < 0.050 0.653 1.667 2.219 2.714 3.300
00665 Total P (whole-water) .050 68 99 < 0.050 0.179 0.335 0.463 0.885 2.000 3.452
00666 Total P (filtered) .010 69 94 < 0.010 < 0.010 0.082 0.178 0.204 0.305 0.408
00671 PO4-P .010 69 100 0.002 0.008 0.087 0.174 0.210 0.308 0.639
00681 DOC .300 64 100 2.476 2.636 3.500 4.500 5.800 7.400 8.600
00689 SOC .200 64 45 0.200 0.400 2.400 > 5.000 > 5.000 > 10.00 > 17.00
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 69 100 27.13 33.28 45.75 52.64 64.03 72.49 85.66
00925 Magnesium .010 69 100 6.296 8.665 13.75 15.65 17.43 20.35 24.02
00930 Sodium .200 69 100 16.41 25.37 39.00 48.47 60.91 86.76 147.6
00935 Potassium .010 69 100 6.980 7.860 8.700 9.300 9.960 11.22 12.00
00940 Chloride .010 69 100 11.72 15.61 22.76 31.12 44.89 88.15 167.3
00945 Sulfate .010 69 100 25.02 47.96 77.68 96.57 115.3 154.5 190.0
00950 Fluoride .100 69 100 0.300 0.312 0.353 0.400 0.435 0.500 0.597
00955 Silica .010 69 100 10.25 13.58 17.85 22.61 29.00 33.00 35.93
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 64 100 3.0 3.0 4.2 5.0 5.9 7.9 8.6
01005 Barium 1.0 44 100 82.9 98.2 113.2 121.1 137.6 158.0 159.0
01010 Beryllium 1.0 44 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 64 100 40.3 49.3 60.9 74.6 86.3 103.6 119.0
01025 Cadmium 1.0 44 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 44 70 < 1.0 < 1.0 < 1.0 1.9 2.9 4.8 11.1
01035 Cobalt 1.0 44 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01040 Copper 1.0 44 98 < 1.0 1.1 2.0 3.3 6.4 10.1 18.4
01046 Iron 10.0 69 10 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0 206.0
01049 Lead 1.0 44 5 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 5.1
01056 Manganese 1.0 49 45 < 1.0 < 1.0 < 1.0 < 1.0 5.0 29.4 220.2
01060 Molybdenum 1.0 44 100 2.6 2.9 3.2 3.6 4.0 4.8 5.4
01065 Nickel 1.0 44 98 < 1.0 1.2 1.9 2.4 3.1 4.0 4.0
01075 Silver 1.0 44 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 64 100 148.8 214.9 343.8 392.1 436.1 509.2 600.0
01085 Vanadium 10.0 64 63 < 10.0 < 10.0 < 10.0 9.6 10.0 11.8 12.1
01090 Zinc 1.0 44 64 < 1.0 < 1.0 < 1.0 1.5 3.5 36.6 60.5
01095 Antimony 1.0 44 2 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 10.0
01106 Aluminum 1.0 44 93 < 1.0 < 1.0 1.4 1.9 2.6 4.6 6.7
01130 Lithium 4.0 64 100 8.4 12.4 18.0 21.0 23.1 28.0 29.0
01145 Selenium 1.0 64 98 < 1.0 1.9 2.3 3.0 3.5 4.5 5.2
22703 Uranium 1.0 44 100 1.7 3.5 8.0 9.4 11.2 13.7 17.0
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 69 19 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 0.051 0.180
04028 Butylate .002 69 3 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.013
04035 Simazine .005 69 87 < 0.005 < 0.005 0.005 0.008 0.016 0.095 0.221
04037 Prometon .018 69 90 < 0.018 < 0.018 0.008 0.013 0.020 0.035 0.061
04040 Desethyl atrazine .002 69 100 0.013 0.018 0.030 0.046 0.125 0.431 0.610
04041 Cyanazine .004 69 90 < 0.004 < 0.004 0.008 0.018 0.224 3.230 11.60
04095 Fonofos .080 69 0 < 0.080 < 0.080 < 0.080 < 0.080 < 0.080 < 0.080 < 0.080
34253 alpha-HCH .002 69 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .010 69 4 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010
38933 Chlorpyrifos .090 69 10 < 0.090 < 0.090 < 0.090 < 0.090 < 0.090 0.020 0.090
39341 gamma-HCH .004 69 1 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004
39381 Dieldrin .001 69 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 69 100 0.008 0.010 0.017 0.067 0.841 6.260 10.60
39532 Malathion .005 69 3 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.044
39542 Parathion .004 69 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .006 69 35 < 0.006 < 0.006 < 0.006 < 0.006 0.004 0.013 0.039
39632 Atrazine .050 69 99 < 0.050 0.046 0.091 0.173 1.770 18.00 34.00
46342 Alachlor .002 69 64 < 0.002 < 0.002 < 0.002 0.008 0.041 1.170 2.700
49260 Acetochlor .005 69 58 < 0.005 < 0.005 < 0.005 0.008 0.195 1.760 4.200
82630 Metribuzin .025 69 35 < 0.025 < 0.025 < 0.025 < 0.025 0.013 0.099 0.310
82660 Diethylanaline .003 69 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 69 38 < 0.002 < 0.002 < 0.002 < 0.002 0.004 0.030 0.069
82663 Ethalfluralin .004 69 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 69 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .020 69 0 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020
82666 Linuron .008 69 0 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008
82667 Methyl parathion .006 69 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .070 69 14 < 0.070 < 0.070 < 0.070 < 0.070 < 0.070 0.005 0.070
82669 Pebulate .004 69 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 69 38 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.011 0.019
82671 Molinate .004 69 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 69 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 69 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .019 69 22 < 0.019 < 0.019 < 0.019 < 0.019 < 0.019 0.066 0.083
82675 Terbufos .013 69 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 69 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 69 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 69 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82679 Propanil .004 69 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 69 9 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.013 0.139
82681 Thiobencarb .002 69 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 69 20 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.004
82683 Pendimethalin .025 69 20 < 0.025 < 0.025 < 0.025 < 0.025 < 0.025 0.028 0.048
82684 Napropamide .003 69 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 69 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .001 69 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82687 Permethrin .005 69 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 69 100 78.10 86.26 97.83 101.9 111.2 125.8 146.8
91064 Terbuthylazin (%) .100 50 100 0.010 90.28 106.9 114.2 122.0 132.7 143.2
91065 HCH alpha-D6 (%) .100 69 100 63.50 75.41 89.26 97.40 103.8 110.4 120.4
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