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 79,000 105,000 141,000 194,000 305,000 506,000 630,000 Cubic meters per second 1,827 2,237 2,973 3,993 5,493 8,637 14,328 17,840
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) 73 1.1 2.1 7.5 17.8 25.2 28.7 31.5 00076 Turbidity (NTU) 73 0.3 4.6 25.0 38.0 74.0 200.0 380.0 00095 Conductance (uS/cm) 73 220.0 340.0 473.0 529.0 597.0 681.0 825.0 00300 Dissolved oxygen 73 4.5 6.1 7.5 8.9 11.4 14.2 15.8 00400 pH (standard units) 73 7.5 7.5 7.8 7.9 8.1 8.2 8.4 00452 CO3 (filtered) 70 0.0 0.0 0.0 0.0 0.0 0.0 7.0 00453 HCO3 (filtered) 70 129.0 144.0 170.0 188.5 197.0 230.0 471.0 39086 Alk (filtered, as CaCO3) 72 106.0 116.0 139.0 154.0 162.5 188.0 386.0 70331 % finer than 62 microns 72 47.4 62.0 74.0 81.0 85.6 93.0 96.0 80154 Suspended sediment 72 51.0 85.0 142.5 210.8 444.0 960.0 1760.0
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 74 69 < 0.020 < 0.020 < 0.020 0.035 0.080 0.230 0.320
00613 NO2-N .010 74 92 < 0.010 < 0.010 0.014 0.020 0.030 0.074 0.111
00623 Org+NH3-N (filtered) .200 74 99 < 0.200 0.300 0.383 0.435 0.500 0.700 0.800
00625 Org+NH3-N (whole-water) .200 73 100 0.207 0.383 0.700 0.852 1.182 1.817 2.526
00631 NO2+NO3-N .050 74 100 0.516 0.894 1.600 2.118 3.006 3.899 4.615
00665 Total P (whole-water) .010 73 100 0.050 0.150 0.194 0.243 0.410 0.714 1.400
00666 Total P (filtered) .010 74 100 0.043 0.064 0.081 0.103 0.122 0.145 0.175
00671 PO4-P .010 74 100 0.020 0.047 0.078 0.091 0.110 0.140 0.163
00681 DOC .300 73 100 3.700 3.900 4.300 4.800 5.433 7.963 8.600
00689 SOC .200 74 95 0.200 0.600 1.100 1.665 3.000 > 8.700 > 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 73 100 23.82 37.00 48.26 53.39 55.22 59.00 65.64
00925 Magnesium .010 73 100 7.761 14.00 17.18 19.80 21.00 23.00 25.00
00930 Sodium .200 73 100 9.414 14.74 21.25 28.37 35.85 45.00 46.18
00935 Potassium .010 73 100 0.910 2.520 3.740 4.300 4.700 5.300 5.700
00940 Chloride .010 74 100 14.65 15.00 18.51 21.11 25.00 35.22 41.32
00945 Sulfate .010 74 100 38.22 43.02 57.07 75.00 96.00 125.3 136.0
00950 Fluoride .100 74 100 0.160 0.200 0.232 0.273 0.300 0.377 0.420
00955 Silica .090 73 99 < 0.090 5.097 7.500 8.724 9.603 11.27 13.52
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 71 92 < 1.0 < 1.0 1.0 1.9 2.2 3.0 3.8
01005 Barium 1.0 50 100 56.0 61.0 65.0 78.7 91.1 358.5 591.0
01010 Beryllium 1.0 50 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 67 99 < 16.0 35.9 49.2 63.6 82.5 104.6 148.5
01025 Cadmium 1.0 50 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 5.0 50 74 < 5.0 < 5.0 < 5.0 2.0 2.7 5.0 11.1
01035 Cobalt 3.0 50 2 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 3.0
01040 Copper 1.0 50 100 1.0 1.0 1.8 2.0 2.3 3.0 3.0
01046 Iron 10.0 71 73 < 10.0 < 10.0 < 10.0 16.0 47.0 116.8 527.0
01049 Lead 1.0 50 6 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.0 1.0
01056 Manganese 1.0 50 60 < 1.0 < 1.0 < 1.0 2.0 4.1 11.0 21.0
01060 Molybdenum 10.0 52 94 < 10.0 < 10.0 2.0 2.4 3.0 10.0 10.0
01065 Nickel 1.0 52 100 1.0 1.6 2.0 2.1 2.9 3.0 5.3
01075 Silver 1.0 52 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 73 100 0.7 142.8 206.7 236.2 280.0 340.0 383.5
01085 Vanadium 10.0 73 7 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0 10.0
01090 Zinc 3.0 52 62 < 3.0 < 3.0 < 3.0 1.4 3.0 18.9 35.7
01095 Antimony 1.0 49 8 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 2.1 3.6
01106 Aluminum 10.0 52 94 < 10.0 < 10.0 5.0 9.0 26.9 58.9 120.9
01130 Lithium 8.9 73 99 < 8.9 6.7 9.8 14.8 19.2 27.6 29.7
01145 Selenium 2.4 73 60 < 2.4 < 2.4 < 2.4 1.0 1.3 2.4 2.4
22703 Uranium 1.0 47 100 1.0 1.0 2.0 2.5 3.0 3.5 4.0
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 72 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 72 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .010 72 81 < 0.010 < 0.010 0.007 0.010 0.036 0.134 0.141
04037 Prometon .018 71 89 < 0.018 < 0.018 0.007 0.009 0.012 0.018 0.026
04040 Desethyl atrazine .002 71 100 0.004 0.005 0.016 0.029 0.080 0.229 0.315
04041 Cyanazine .020 72 74 < 0.020 < 0.020 < 0.020 0.026 0.085 0.713 1.700
04095 Fonofos .003 72 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 72 1 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 1.880
34653 p,p DDE .006 72 4 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .030 70 14 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030 0.020 0.050
39341 gamma-HCH .004 72 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 72 1 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.003
39415 Metolachlor .002 72 100 0.025 0.040 0.075 0.252 0.708 1.460 2.600
39532 Malathion .005 72 4 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.039
39542 Parathion .004 72 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .010 72 49 < 0.010 < 0.010 < 0.010 < 0.010 0.006 0.019 0.093
39632 Atrazine .001 72 100 0.054 0.093 0.170 0.265 1.445 4.440 5.960
46342 Alachlor .017 72 82 < 0.017 < 0.017 0.007 0.012 0.038 0.125 0.259
49260 Acetochlor .010 72 92 < 0.010 < 0.010 0.018 0.053 0.244 0.740 1.090
82630 Metribuzin .020 72 31 < 0.020 < 0.020 < 0.020 < 0.020 0.012 0.026 0.029
82660 Diethylanaline .003 72 6 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.003 0.004
82661 Trifluralin .002 72 14 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.004 0.005
82663 Ethalfluralin .004 72 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 72 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 72 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .002 72 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .070 72 4 < 0.070 < 0.070 < 0.070 < 0.070 < 0.070 < 0.070 0.070
82668 EPTC .002 72 13 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003 0.006
82669 Pebulate .004 72 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .020 72 6 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 0.010 0.020
82671 Molinate .004 72 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 72 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 72 1 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
82674 Carbofuran .010 72 8 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.018 0.039
82675 Terbufos .013 72 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 72 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 72 1 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 0.017
82678 Triallate .001 72 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82679 Propanil .004 72 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 72 4 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.045
82681 Thiobencarb .005 72 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
82682 Dachthal (DCPA) .002 72 17 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.028
82683 Pendimethalin .010 72 3 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.016
82684 Napropamide .003 72 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 72 1 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 0.024
82686 Azinphos methyl .001 71 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82687 Permethrin .005 72 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .000 72 99 < 0.000 51.10 79.10 90.12 100.0 120.0 203.7
91064 Terbuthylazin (%) .000 56 98 < 0.000 0.070 80.70 96.12 108.3 140.0 302.6
91065 HCH alpha-D6 (%) .000 72 99 < 0.000 44.67 77.35 88.80 99.32 122.6 233.0
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 52 98 < 0.10 0.70 0.90 1.20 3.00 10.00 13.00
29818 Arsenic (ppm) 0.10 52 100 4.90 6.30 7.95 8.80 10.10 12.90 16.80
29820 Barium (ppm) 1.00 52 100 290.0 390.0 590.0 640.0 655.0 700.0 910.0
29822 Beryllium (ppm) 0.10 52 100 1.00 1.00 1.25 1.35 1.50 1.70 1.80
29826 Cadmium (ppm) 0.10 52 100 0.10 0.20 0.40 0.50 0.60 1.30 1.50
29829 Chromium (ppm) 1.00 52 94 < 1.00 < 1.00 58.00 63.50 74.00 89.00 110.0
29832 Copper (ppm) 1.00 52 100 11.00 14.00 18.00 21.00 23.00 32.00 59.00
29836 Lead (ppm) 1.00 52 100 12.00 17.00 21.50 25.00 28.00 43.00 85.00
29839 Manganese (ppm) 10.0 52 100 230.0 260.0 805.0 1000 1200 1500 2700
29841 Mercury (ppm) 0.01 51 82 < 0.01 < 0.01 0.01 0.03 0.04 0.07 0.13
29843 Molybdenum (ppm) 5.00 52 15 < 5.00 < 5.00 < 5.00 < 5.00 < 10.00 25.00 25.00
29845 Nickel (ppm) 1.00 52 94 < 1.00 < 1.00 33.50 37.50 45.00 62.00 75.00
29847 Selenium (ppm) 0.10 52 96 < 0.10 0.50 0.70 0.90 1.10 1.40 2.20
29850 Silver (ppm) 0.50 52 4 < 0.50 < 0.50 < 0.50 < 0.50 < 2.50 < 2.50 5.00
29853 Vanadium (ppm) 1.00 52 100 45.00 50.00 72.50 84.00 92.00 110.0 120.0
29855 Zinc (ppm) 1.00 52 100 60.00 70.00 90.00 90.00 110.0 140.0 510.0
30221 Aluminum (%) 0.10 52 100 3.80 4.30 5.00 5.55 6.00 6.60 7.20
30244 Total carbon (%) 0.10 52 92 < 0.10 < 0.10 2.00 2.45 2.80 4.70 5.50
30269 Iron (%) 0.10 52 100 1.40 1.60 2.30 2.55 2.90 3.50 3.60
30292 Phosphorus (%) 0.01 52 100 0.07 0.07 0.08 0.09 0.10 0.15 0.24
30308 Sulfur (%) 0.10 47 87 < 0.10 < 0.10 0.20 0.40 0.70 1.40 1.90
30317 Titanium (%) 0.01 52 100 0.17 0.20 0.29 0.30 0.31 0.40 0.40
35031 Cobalt (ppm) 1.00 52 100 5.00 8.00 10.00 11.00 12.00 14.00 18.00
35040 Strontium (ppm) 0.01 52 100 130.0 140.0 160.0 180.0 225.0 320.0 390.0
35046 Uranium (ppm) 50.0 52 0 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0 < 250.0
35050 Lithium (ppm) 1.00 52 100 16.00 23.00 28.00 32.00 35.00 41.00 48.00
49955 Thallium (ppm) 50.0 52 0 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0 < 250.0
50279 Sediment (mg/L) 1.00 52 100 13.00 39.00 105.5 169.0 302.0 825.0 1622
50465 Organic carbon (%) 0.10 51 92 < 0.10 < 0.10 1.60 1.90 2.20 4.70 7.30
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