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 44,900 72,900 106,000 137,000 169,000 239,000 410,000 Cubic meters per second 1,827 1,271 2,064 3,002 3,879 4,786 6,768 11,610
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) 45 3.0 4.0 7.5 12.0 15.4 19.2 20.5 00076 Turbidity (NTU) 45 0.1 0.3 0.5 0.9 1.7 4.0 4.7 00095 Conductance (uS/cm) 45 111.0 114.0 124.0 135.0 145.0 153.0 157.0 00300 Dissolved oxygen 45 9.2 9.5 10.8 12.4 13.2 13.8 14.0 00400 pH (standard units) 45 7.4 7.7 7.9 8.0 8.1 8.2 8.2 00452 CO3 (filtered) 45 0.0 0.0 0.0 0.0 0.0 0.0 0.0 00453 HCO3 (filtered) 45 55.0 56.0 61.0 67.0 72.0 76.0 77.0 39086 Alk (filtered, as CaCO3) 45 45.0 46.0 50.0 55.0 59.0 62.0 63.0 70331 % finer than 62 microns 32 44.0 50.0 67.2 78.0 85.2 93.0 94.0 80154 Suspended sediment 45 0.5 1.0 2.0 3.0 4.0 8.0 12.0
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 45 44 < 0.015 < 0.015 < 0.015 < 0.015 0.004 0.020 0.030
00613 NO2-N .010 45 76 < 0.010 < 0.010 0.001 0.002 0.003 0.010 0.020
00623 Org+NH3-N (filtered) .200 45 29 < 0.200 < 0.200 < 0.200 < 0.200 0.200 0.200 0.200
00625 Org+NH3-N (whole-water) .200 44 45 < 0.200 < 0.200 < 0.200 < 0.200 0.200 0.200 0.200
00631 NO2+NO3-N .050 45 100 0.033 0.040 0.064 0.096 0.148 0.179 0.259
00665 Total P (whole-water) .050 44 59 < 0.050 < 0.050 < 0.050 0.010 0.016 0.050 0.050
00666 Total P (filtered) .050 45 16 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 0.050 0.050
00671 PO4-P .001 45 67 < 0.001 < 0.001 < 0.001 0.002 0.002 0.006 0.006
00681 DOC .300 44 100 1.088 1.100 1.296 1.575 1.900 2.500 3.600
00689 SOC .200 42 93 < 0.200 < 0.200 0.200 0.300 0.300 0.400 0.500
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 45 100 13.94 14.26 15.55 17.27 18.32 19.74 20.00
00925 Magnesium .010 45 100 3.276 3.337 3.721 4.118 4.558 4.975 5.159
00930 Sodium .200 45 100 1.751 1.862 1.957 2.180 2.339 2.747 2.951
00935 Potassium .010 45 100 0.620 0.660 0.690 0.740 0.800 0.890 0.970
00940 Chloride .010 45 100 0.569 0.700 0.800 0.979 1.135 1.523 1.950
00945 Sulfate .010 45 100 4.972 5.804 6.956 8.139 8.951 10.09 11.00
00950 Fluoride .100 45 11 < 0.100 < 0.100 < 0.100 < 0.100 < 0.100 0.102 0.105
00955 Silica .010 45 100 4.300 4.437 5.113 5.724 7.218 8.431 9.137
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 45 9 < 2.0 < 2.0 < 2.0 < 2.0 < 2.0 2.0 2.0
01005 Barium 1.0 25 100 22.1 23.0 26.4 27.2 29.6 33.0 33.6
01010 Beryllium 1.0 25 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 44 0 < 16.0 < 16.0 < 16.0 < 16.0 < 16.0 < 16.0 < 16.0
01025 Cadmium 1.0 25 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 25 28 < 1.0 < 1.0 < 1.0 < 1.0 1.0 1.6 1.6
01035 Cobalt 1.0 25 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01040 Copper 1.0 25 72 < 1.0 < 1.0 < 1.0 1.1 1.7 3.2 5.8
01046 Iron 10.0 45 47 < 10.0 < 10.0 < 10.0 < 10.0 10.0 20.2 65.7
01049 Lead 1.0 25 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 25 40 < 1.0 < 1.0 < 1.0 < 1.0 1.2 2.2 6.6
01060 Molybdenum 1.0 25 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01065 Nickel 1.0 25 20 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 4.0 4.0
01075 Silver 1.0 25 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 45 100 65.7 66.5 80.0 90.0 97.2 102.3 109.0
01085 Vanadium 10.0 45 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01090 Zinc 1.0 25 80 < 1.0 < 1.0 1.1 1.9 3.0 6.0 6.5
01095 Antimony 1.0 25 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 1.0 25 100 1.1 2.0 3.3 6.0 9.6 14.6 80.3
01130 Lithium 6.0 45 4 < 6.0 < 6.0 < 6.0 < 6.0 < 6.0 < 6.0 6.0
01145 Selenium 2.4 45 2 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4
22703 Uranium 1.0 25 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 45 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 45 4 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.012
04035 Simazine .005 45 4 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.005
04037 Prometon .018 45 0 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018
04040 Desethyl atrazine .002 45 9 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.003
04041 Cyanazine .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
04095 Fonofos .003 45 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 45 13 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.006
38933 Chlorpyrifos .004 45 7 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004 0.005
39341 gamma-HCH .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 45 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 45 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
39532 Malathion .005 45 7 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.005 0.008
39542 Parathion .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
39632 Atrazine .001 45 16 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.003 0.004
46342 Alachlor .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
49260 Acetochlor .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82630 Metribuzin .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82660 Diethylanaline .003 45 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 45 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003
82663 Ethalfluralin .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 45 2 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 0.007
82666 Linuron .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 45 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .002 45 11 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003 0.040
82669 Pebulate .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 45 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82671 Molinate .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 45 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .003 45 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82675 Terbufos .013 45 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 45 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 45 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 45 2 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.005
82679 Propanil .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 45 16 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.005 0.016
82681 Thiobencarb .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 45 20 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.004
82683 Pendimethalin .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .003 45 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 44 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .014 45 7 < 0.014 < 0.014 < 0.014 < 0.014 < 0.014 0.009 0.014
82687 Permethrin .005 45 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 45 100 77.60 85.00 92.79 98.80 106.3 127.0 133.7
91064 Terbuthylazin (%) .100 31 100 92.79 98.48 101.0 111.2 119.8 131.3 135.0
91065 HCH alpha-D6 (%) .100 45 100 71.52 80.87 88.36 95.58 103.3 112.4 118.3
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 6 83 < 0.10 < 0.10 1.80 2.25 2.60 5.90 5.90
29818 Arsenic (ppm) 0.10 6 83 < 0.10 < 0.10 12.20 14.15 21.00 22.00 22.00
29820 Barium (ppm) 1.00 6 100 510.0 510.0 550.0 655.0 710.0 1100 1100
29822 Beryllium (ppm) 0.10 6 100 1.10 1.10 1.20 1.40 1.70 2.60 2.60
29826 Cadmium (ppm) 0.10 6 100 2.30 2.30 2.40 2.70 3.20 4.10 4.10
29829 Chromium (ppm) 1.00 6 100 99.00 99.00 110.0 165.0 180.0 240.0 240.0
29832 Copper (ppm) 1.00 6 100 51.00 51.00 59.00 67.50 87.00 110.0 110.0
29836 Lead (ppm) 1.00 6 100 36.00 36.00 79.00 88.50 165.0 219.0 219.0
29839 Manganese (ppm) 10.0 6 100 1400 1400 1400 1750 2400 2600 2600
29841 Mercury (ppm) 0.01 3 67 < 0.01 < 0.01 0.01 0.06 0.18 0.18 0.18
29843 Molybdenum (ppm) 5.00 6 33 < 5.00 < 5.00 < 10.00 < 12.50 20.00 25.00 25.00
29845 Nickel (ppm) 1.00 6 100 68.00 68.00 68.00 115.0 140.0 200.0 200.0
29847 Selenium (ppm) 0.10 6 83 < 0.10 < 0.10 0.80 1.00 1.20 1.40 1.40
29850 Silver (ppm) 0.50 6 33 < 0.50 < 0.50 < 1.00 < 1.00 1.40 2.50 2.50
29853 Vanadium (ppm) 1.00 6 100 78.00 78.00 89.00 96.50 120.0 120.0 120.0
29855 Zinc (ppm) 1.00 6 100 410.0 410.0 430.0 495.0 590.0 1000 1000
30221 Aluminum (%) 0.10 6 100 5.40 5.40 5.80 5.95 6.20 7.20 7.20
30244 Total carbon (%) 0.10 5 80 < 0.10 < 0.10 3.40 5.00 5.80 7.60 7.60
30269 Iron (%) 0.10 6 100 3.10 3.10 3.60 4.05 4.50 5.20 5.20
30292 Phosphorus (%) 0.01 6 100 0.13 0.13 0.13 0.16 0.18 0.43 0.43
30308 Sulfur (%) 0.10 5 80 < 0.10 < 0.10 0.20 0.30 0.30 0.40 0.40
30317 Titanium (%) 0.01 6 100 0.30 0.30 0.30 0.35 0.40 0.50 0.50
35031 Cobalt (ppm) 1.00 6 100 15.00 15.00 16.00 20.00 21.00 24.00 24.00
35040 Strontium (ppm) 0.01 6 100 220.0 220.0 240.0 280.0 330.0 540.0 540.0
35046 Uranium (ppm) 50.0 6 0 < 50.00 < 50.00 < 100.0 < 100.0 < 100.0 < 500.0 < 500.0
35050 Lithium (ppm) 1.00 6 100 25.00 25.00 26.00 30.00 34.00 45.00 45.00
49955 Thallium (ppm) 50.0 6 0 < 50.00 < 50.00 < 100.0 < 100.0 < 250.0 < 500.0 < 500.0
50279 Sediment (mg/L) 1.00 6 100 1.00 1.00 2.00 4.00 6.00 11.00 11.00
50465 Organic carbon (%) 0.10 3 67 < 0.10 < 0.10 0.10 3.30 4.80 4.80 4.80
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