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 1,827 138,000 170,000 277,000 453,000 732,000 1,010,000 1,480,000 Cubic meters per second 1,827 3,908 4,814 7,844 12,828 20,728 28,600 41,909
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) 72 2.0 6.5 12.5 19.9 26.4 30.5 34.0 00076 Turbidity (NTU) 72 1.0 16.0 26.5 46.5 63.5 106.0 290.0 00095 Conductance (uS/cm) 72 256.0 310.0 338.0 391.0 460.5 522.0 550.0 00300 Dissolved oxygen 71 5.9 6.1 7.0 8.4 10.0 11.5 12.4 00400 pH (standard units) 72 7.2 7.3 7.7 7.9 8.0 8.1 8.3 00452 CO3 (filtered) 50 0.0 0.0 0.0 0.0 0.0 0.0 4.0 00453 HCO3 (filtered) 54 85.0 96.0 117.0 127.0 143.0 170.0 176.0 39086 Alk (filtered, as CaCO3) 54 70.0 78.0 96.0 104.5 117.0 140.0 146.0 70331 % finer than 62 microns 69 55.0 60.0 75.0 88.5 96.2 98.9 100.0 80154 Suspended sediment 69 37.0 56.0 110.0 183.0 229.0 354.0 484.0
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 72 51 < 0.020 < 0.020 < 0.020 0.020 0.030 0.067 0.090
00613 NO2-N .010 72 46 < 0.010 < 0.010 < 0.010 < 0.010 0.020 0.032 0.114
00623 Org+NH3-N (filtered) .200 68 90 < 0.200 < 0.200 0.209 0.251 0.293 0.346 0.400
00625 Org+NH3-N (whole-water) .200 71 100 0.300 0.334 0.442 0.577 0.673 0.845 1.145
00631 NO2+NO3-N .050 71 100 0.500 0.664 1.054 1.281 1.640 2.644 2.901
00665 Total P (whole-water) .010 71 100 0.060 0.080 0.141 0.180 0.234 0.351 0.420
00666 Total P (filtered) .010 71 99 < 0.010 0.030 0.050 0.062 0.077 0.109 0.123
00671 PO4-P .010 66 100 0.029 0.038 0.051 0.060 0.080 0.107 0.114
00681 DOC .300 66 100 2.200 3.100 3.400 3.663 3.984 5.200 6.200
00689 SOC .200 67 100 0.400 0.500 1.100 1.688 2.700 5.000 7.400
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 70 100 27.35 30.00 35.24 38.11 43.00 46.88 49.51
00925 Magnesium .010 72 100 7.214 8.473 10.27 12.03 14.36 16.58 18.09
00930 Sodium .200 72 100 9.371 10.00 14.96 18.79 25.40 34.00 41.32
00935 Potassium .010 72 100 2.400 2.500 2.945 3.260 3.615 4.000 4.050
00940 Chloride .010 72 100 10.40 12.00 16.36 20.35 23.98 30.55 37.13
00945 Sulfate .010 72 100 26.83 31.33 37.63 46.22 58.39 84.37 92.39
00950 Fluoride .100 72 97 < 0.100 0.105 0.163 0.193 0.214 0.266 0.320
00955 Silica .010 72 100 2.600 4.142 5.717 6.265 7.012 8.190 9.120
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 69 70 < 2.0 < 2.0 < 2.0 1.2 1.8 2.0 3.0
01005 Barium 1.0 50 100 41.8 43.0 49.3 57.0 63.2 74.0 77.5
01010 Beryllium 1.0 48 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 69 100 21.6 25.5 33.2 40.0 48.4 72.9 77.7
01025 Cadmium 1.0 48 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 48 48 < 1.0 < 1.0 < 1.0 < 1.0 1.5 2.2 9.6
01035 Cobalt 3.0 50 0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0
01040 Copper 1.0 47 100 1.1 1.5 1.7 2.0 2.1 2.8 6.5
01046 Iron 10.0 70 34 < 10.0 < 10.0 < 10.0 < 10.0 10.0 19.0 33.0
01049 Lead 1.0 48 4 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.9
01056 Manganese 1.0 50 56 < 1.0 < 1.0 < 1.0 1.0 2.5 6.0 9.8
01060 Molybdenum 10.0 50 88 < 10.0 < 10.0 1.2 1.7 2.2 3.5 10.0
01065 Nickel 1.0 49 98 < 1.0 1.0 1.5 1.7 2.0 3.0 3.0
01075 Silver 1.0 50 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 71 100 107.6 128.2 150.0 177.6 202.5 251.0 283.8
01085 Vanadium 10.0 72 4 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0
01090 Zinc 1.0 46 87 < 1.0 < 1.0 1.2 2.0 2.9 6.1 7.0
01095 Antimony 1.0 48 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 10.0 48 98 < 10.0 1.6 2.9 4.0 5.0 10.0 21.0
01130 Lithium 6.0 71 86 < 6.0 < 6.0 4.6 6.1 9.4 15.4 17.0
01145 Selenium 2.4 71 4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4
22703 Uranium 1.0 48 52 < 1.0 < 1.0 < 1.0 1.0 1.5 2.0 2.1
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 71 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 71 6 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.002
04035 Simazine .050 71 99 < 0.050 0.014 0.020 0.031 0.088 0.250 0.408
04037 Prometon .050 71 94 < 0.050 < 0.050 0.006 0.009 0.013 0.018 0.050
04040 Desethyl atrazine .050 72 97 < 0.050 0.012 0.024 0.047 0.093 0.248 0.445
04041 Cyanazine .200 72 90 < 0.200 < 0.200 0.015 0.028 0.094 0.850 0.915
04095 Fonofos .003 71 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 71 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 71 6 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.006
38933 Chlorpyrifos .005 71 3 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.018
39341 gamma-HCH .004 71 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 71 7 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.004 0.007
39415 Metolachlor .002 72 100 0.030 0.033 0.052 0.125 0.503 1.360 2.430
39532 Malathion .005 71 15 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.011 0.022
39542 Parathion .004 71 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 71 58 < 0.002 < 0.002 < 0.002 0.003 0.005 0.012 0.024
39632 Atrazine .001 72 100 0.060 0.072 0.120 0.314 1.105 3.650 4.710
46342 Alachlor .050 72 82 < 0.050 < 0.050 0.004 0.008 0.036 0.113 0.170
49260 Acetochlor .002 71 94 < 0.002 < 0.002 0.008 0.016 0.148 0.370 0.558
82630 Metribuzin .050 72 46 < 0.050 < 0.050 < 0.050 < 0.050 0.020 0.050 0.080
82660 Diethylanaline .003 71 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 71 37 < 0.002 < 0.002 < 0.002 < 0.002 0.003 0.006 0.008
82663 Ethalfluralin .004 71 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 71 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 71 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .002 71 4 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.008
82667 Methyl parathion .006 71 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .002 71 10 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.005
82669 Pebulate .004 71 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .020 71 87 < 0.020 < 0.020 0.008 0.010 0.012 0.016 0.020
82671 Molinate .004 71 23 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.033 0.129
82672 Ethoprop .003 71 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 71 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .010 71 24 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.015 0.024
82675 Terbufos .013 71 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 71 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 71 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 71 1 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.003
82679 Propanil .004 71 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .020 71 3 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 0.020
82681 Thiobencarb .002 71 6 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.007
82682 Dachthal (DCPA) .002 69 3 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
82683 Pendimethalin .011 71 15 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011 0.010 0.012
82684 Napropamide .003 71 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 70 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .020 71 0 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020
82687 Permethrin .005 71 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 71 100 66.64 75.62 93.70 100.6 107.0 117.0 218.0
91064 Terbuthylazin (%) .100 51 100 96.20 99.03 106.0 114.0 118.9 129.7 249.0
91065 HCH alpha-D6 (%) .100 71 100 70.80 81.76 89.98 99.13 103.7 113.3 217.0
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 52 100 0.60 0.70 0.85 1.00 1.40 2.50 4.20
29818 Arsenic (ppm) 0.10 52 100 5.80 7.90 9.60 11.15 12.35 14.40 16.00
29820 Barium (ppm) 1.00 52 100 450.0 530.0 575.0 600.0 630.0 660.0 710.0
29822 Beryllium (ppm) 0.10 52 100 1.10 1.20 1.45 1.60 1.70 1.80 2.20
29826 Cadmium (ppm) 0.10 52 98 < 0.10 0.20 0.40 0.50 0.60 0.80 1.00
29829 Chromium (ppm) 1.00 52 96 < 1.00 48.00 58.00 63.00 68.00 80.00 100.0
29832 Copper (ppm) 1.00 52 100 13.00 15.00 20.00 22.50 25.00 28.00 31.00
29836 Lead (ppm) 1.00 52 100 17.00 20.00 22.00 24.00 27.00 37.00 71.00
29839 Manganese (ppm) 10.0 52 100 560.0 640.0 930.0 1150 1450 2300 2900
29841 Mercury (ppm) 0.01 52 96 < 0.01 0.02 0.03 0.04 0.06 0.10 0.26
29843 Molybdenum (ppm) 5.00 52 6 < 2.00 < 5.00 < 5.00 < 5.00 < 25.00 25.00 25.00
29845 Nickel (ppm) 1.00 52 96 < 1.00 29.00 35.00 39.00 41.00 50.00 52.00
29847 Selenium (ppm) 0.10 52 100 0.30 0.40 0.50 0.60 0.80 1.10 1.30
29850 Silver (ppm) 0.50 52 4 < 0.50 < 0.50 < 0.50 < 0.50 < 2.50 < 2.50 2.50
29853 Vanadium (ppm) 1.00 52 100 55.00 60.00 80.00 91.00 95.50 110.0 140.0
29855 Zinc (ppm) 1.00 52 100 70.00 90.00 100.0 110.0 130.0 150.0 180.0
30221 Aluminum (%) 0.10 52 100 4.50 4.90 5.75 6.10 6.50 7.30 7.80
30244 Total carbon (%) 0.10 52 98 < 0.10 1.20 1.65 1.90 2.20 2.80 3.10
30269 Iron (%) 0.10 52 100 1.90 2.10 2.70 3.00 3.20 3.80 4.30
30292 Phosphorus (%) 0.01 52 100 0.05 0.08 0.09 0.10 0.11 0.12 0.14
30308 Sulfur (%) 0.10 47 85 < 0.10 < 0.10 0.10 0.20 0.30 1.00 1.30
30317 Titanium (%) 0.01 52 100 0.20 0.24 0.30 0.33 0.40 0.40 0.41
35031 Cobalt (ppm) 1.00 52 100 9.00 9.00 12.00 13.00 15.00 16.00 16.00
35040 Strontium (ppm) 0.01 52 100 110.0 130.0 140.0 150.0 160.0 240.0 250.0
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 22.00 25.00 31.50 36.50 38.00 46.00 52.00
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 43.00 46.00 94.50 149.5 203.5 319.0 371.0
50465 Organic carbon (%) 0.10 52 98 < 0.10 1.00 1.35 1.55 2.00 2.40 2.50
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