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 51,300 70,800 89,400 105,000 128,000 193,000 302,000 Cubic meters per second 1,827 1,453 2,005 2,532 2,973 3,625 5,465 8,552
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) 57 1.8 2.9 5.0 9.1 14.1 18.0 19.0 00076 Turbidity (NTU) 55 0.2 0.3 0.4 0.6 1.1 3.0 3.7 00095 Conductance (uS/cm) 57 118.0 119.0 127.0 137.0 146.0 155.0 156.0 00300 Dissolved oxygen 57 9.0 9.8 11.0 12.5 13.2 14.4 14.8 00400 pH (standard units) 57 7.8 8.0 8.1 8.2 8.2 8.3 8.3 00452 CO3 (filtered) 56 0.0 0.0 0.0 0.0 0.0 0.0 0.0 00453 HCO3 (filtered) 57 58.0 60.0 65.0 71.0 75.0 80.0 82.0 39086 Alk (filtered, as CaCO3) 57 48.0 49.0 54.0 58.0 62.0 66.0 67.0 70331 % finer than 62 microns 54 14.0 21.5 35.8 48.7 65.0 92.0 100.0 80154 Suspended sediment 57 0.5 1.0 2.0 4.0 8.0 28.0 41.0
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 .015 56 75 < 0.015 < 0.015 < 0.015 0.010 0.015 0.040 0.060
00613 NO2-N .010 56 59 < 0.010 < 0.010 < 0.010 0.001 0.010 0.010 0.020
00623 Org+NH3-N (filtered) .200 56 27 < 0.200 < 0.200 < 0.200 < 0.200 0.200 0.200 0.200
00625 Org+NH3-N (whole-water) .200 56 34 < 0.200 < 0.200 < 0.200 < 0.200 0.200 0.200 0.287
00631 NO2+NO3-N .050 56 96 < 0.050 0.029 0.049 0.070 0.100 0.120 0.160
00665 Total P (whole-water) .050 56 45 < 0.050 < 0.050 < 0.050 < 0.050 0.015 0.050 0.051
00666 Total P (filtered) .050 56 16 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 0.030 0.050
00671 PO4-P .001 56 52 < 0.001 < 0.001 < 0.001 0.001 0.002 0.003 0.009
00681 DOC .300 56 100 0.900 1.000 1.100 1.300 1.509 2.000 2.900
00689 SOC .200 54 74 < 0.100 < 0.100 < 0.200 0.200 0.300 0.500 1.500
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 56 100 15.54 15.88 16.82 18.20 19.89 21.00 22.00
00925 Magnesium .010 56 100 3.341 3.500 3.870 4.232 4.587 5.100 5.200
00930 Sodium .200 56 100 1.200 1.217 1.508 1.740 1.913 2.251 2.302
00935 Potassium .010 56 100 0.400 0.500 0.600 0.625 0.675 0.730 0.770
00940 Chloride .010 55 100 0.480 0.500 0.603 0.800 0.890 1.330 1.691
00945 Sulfate .010 55 100 5.845 6.249 7.000 7.830 8.292 9.143 9.500
00950 Fluoride .100 55 15 < 0.100 < 0.100 < 0.100 < 0.100 < 0.100 0.102 0.200
00955 Silica .010 56 100 3.405 3.700 4.615 5.201 6.150 6.800 7.234
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 56 5 < 2.0 < 2.0 < 2.0 < 2.0 < 2.0 2.0 2.0
01005 Barium 1.0 45 100 20.0 23.0 27.9 33.0 36.0 40.0 42.0
01010 Beryllium 1.0 45 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 54 2 < 16.0 < 16.0 < 16.0 < 16.0 < 16.0 < 16.0 20.0
01025 Cadmium 1.0 45 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 45 22 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.5 1.6
01035 Cobalt 1.0 45 2 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.0
01040 Copper 1.0 45 47 < 1.0 < 1.0 < 1.0 < 1.0 1.3 2.0 2.2
01046 Iron 10.0 56 46 < 10.0 < 10.0 < 10.0 < 10.0 10.0 16.0 18.6
01049 Lead 1.0 45 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 45 49 < 1.0 < 1.0 < 1.0 < 1.0 1.1 2.0 2.9
01060 Molybdenum 1.0 45 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01065 Nickel 1.0 45 9 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.5 2.0
01075 Silver 1.0 43 2 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.0
01080 Strontium 0.5 56 100 65.0 68.5 78.3 86.4 93.4 101.4 110.0
01085 Vanadium 10.0 56 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01090 Zinc 1.0 45 100 1.1 1.3 2.0 2.9 4.0 7.5 12.1
01095 Antimony 1.0 45 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 1.0 45 100 3.0 4.0 5.3 7.7 11.0 15.0 21.1
01130 Lithium 6.0 56 7 < 6.0 < 6.0 < 6.0 < 6.0 < 6.0 6.0 6.0
01145 Selenium 2.4 56 0 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4
22703 Uranium 1.0 45 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 .010 56 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
04028 Butylate .002 56 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
04035 Simazine .011 56 4 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011 0.011
04037 Prometon .018 56 0 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018
04040 Desethyl atrazine .006 56 2 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
04041 Cyanazine .018 56 0 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018
04095 Fonofos .003 56 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .005 56 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
34653 p,p DDE .006 56 11 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.006
38933 Chlorpyrifos .005 56 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
39341 gamma-HCH .004 56 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .005 56 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
39415 Metolachlor .013 56 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
39532 Malathion .027 56 0 < 0.027 < 0.027 < 0.027 < 0.027 < 0.027 < 0.027 < 0.027
39542 Parathion .007 56 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
39572 Diazinon .005 56 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
39632 Atrazine .008 56 11 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 0.005 0.008
46342 Alachlor .002 56 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
49260 Acetochlor .004 56 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82630 Metribuzin .006 56 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82660 Diethylanaline .003 56 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .009 56 0 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009
82663 Ethalfluralin .009 56 0 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009
82664 Phorate .011 56 0 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011
82665 Terbacil .034 56 0 < 0.034 < 0.034 < 0.034 < 0.034 < 0.034 < 0.034 < 0.034
82666 Linuron .035 56 0 < 0.035 < 0.035 < 0.035 < 0.035 < 0.035 < 0.035 < 0.035
82667 Methyl parathion .020 56 0 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020
82668 EPTC .002 56 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82669 Pebulate .004 56 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .016 56 0 < 0.016 < 0.016 < 0.016 < 0.016 < 0.016 < 0.016 < 0.016
82671 Molinate .004 56 2 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.011
82672 Ethoprop .005 56 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
82673 Benfluralin .010 56 2 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010
82674 Carbofuran .020 56 0 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020
82675 Terbufos .017 56 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82676 Pronamide .004 56 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82677 Disulfoton .021 56 0 < 0.021 < 0.021 < 0.021 < 0.021 < 0.021 < 0.021 < 0.021
82678 Triallate .002 56 4 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
82679 Propanil .011 56 0 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011
82680 Carbaryl .041 56 0 < 0.041 < 0.041 < 0.041 < 0.041 < 0.041 < 0.041 < 0.041
82681 Thiobencarb .005 56 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
82682 Dachthal (DCPA) .003 56 13 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.002 0.003
82683 Pendimethalin .010 56 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82684 Napropamide .007 56 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82685 Propargite .050 56 0 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050
82686 Azinphos methyl .050 56 0 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050
82687 Permethrin .006 56 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
91063 Diazinon-d10 (%) .100 55 100 73.50 76.48 90.27 98.20 104.0 113.6 120.2
91064 Terbuthylazin (%) .100 40 100 83.81 88.67 103.1 108.2 115.5 126.4 132.1
91065 HCH alpha-D6 (%) .100 55 100 64.28 78.15 86.40 95.00 102.7 115.0 118.8
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 21 95 < 0.10 3.20 17.00 22.00 69.00 140.0 150.0
29818 Arsenic (ppm) 0.10 21 95 < 0.10 5.00 7.90 12.00 12.30 15.00 17.70
29820 Barium (ppm) 1.00 21 100 340.0 360.0 920.0 1000 1400 1900 2000
29822 Beryllium (ppm) 0.10 21 100 1.20 1.40 1.60 1.70 1.90 2.30 2.30
29826 Cadmium (ppm) 0.10 21 100 1.30 2.00 3.00 3.40 4.30 5.90 6.80
29829 Chromium (ppm) 1.00 21 90 < 1.00 < 1.00 77.00 120.0 150.0 180.0 450.0
29832 Copper (ppm) 1.00 21 100 48.00 75.00 200.0 300.0 770.0 1600 1900
29836 Lead (ppm) 1.00 21 100 89.00 110.0 140.0 190.0 270.0 370.0 500.0
29839 Manganese (ppm) 10.0 21 100 850.0 870.0 1100 1700 2200 3100 3200
29841 Mercury (ppm) 0.01 12 75 < 0.01 < 0.01 0.01 0.08 0.19 0.58 0.58
29843 Molybdenum (ppm) 5.00 21 81 < 5.00 < 5.00 11.00 13.00 22.00 33.00 54.00
29845 Nickel (ppm) 1.00 21 90 < 1.00 < 1.00 37.00 52.00 65.00 130.0 220.0
29847 Selenium (ppm) 0.10 21 95 < 0.10 0.60 0.70 1.10 1.20 1.60 2.20
29850 Silver (ppm) 0.50 21 81 < 0.50 < 0.50 1.00 1.70 4.60 9.00 11.10
29853 Vanadium (ppm) 1.00 21 100 38.00 47.00 70.00 75.00 77.00 83.00 85.00
29855 Zinc (ppm) 1.00 21 100 670.0 750.0 1500 2200 7100 8900 9300
30221 Aluminum (%) 0.10 21 95 < 0.10 3.80 4.90 5.30 5.80 6.20 7.10
30244 Total carbon (%) 0.10 14 71 < 0.10 < 0.10 < 0.10 2.70 3.90 7.10 7.10
30269 Iron (%) 0.10 21 100 2.00 2.90 3.90 5.00 8.80 12.10 12.60
30292 Phosphorus (%) 0.01 21 100 0.07 0.11 0.13 0.14 0.16 0.19 0.66
30308 Sulfur (%) 0.10 14 64 < 0.10 < 0.10 < 0.10 0.40 0.50 0.90 0.90
30317 Titanium (%) 0.01 21 100 0.17 0.20 0.20 0.20 0.28 0.30 0.31
35031 Cobalt (ppm) 1.00 21 100 8.00 11.00 15.00 20.00 59.00 72.00 95.00
35040 Strontium (ppm) 0.01 21 100 260.0 280.0 310.0 380.0 440.0 500.0 540.0
35046 Uranium (ppm) 50.0 21 0 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 250.0 < 250.0
35050 Lithium (ppm) 1.00 21 100 15.00 18.00 24.00 28.00 32.00 38.00 43.00
49955 Thallium (ppm) 50.0 21 0 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 250.0 < 250.0
50279 Sediment (mg/L) 1.00 21 100 0.10 0.20 4.00 4.50 7.00 23.00 43.00
50465 Organic carbon (%) 0.10 12 75 < 0.10 < 0.10 0.70 1.80 4.35 5.90 5.90
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