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 1,827 235 482 844 1,160 2,010 6,380 11,300 Cubic meters per second 1,827 7 14 24 33 57 181 320
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) 47 0.0 3.5 11.0 15.0 22.0 26.0 26.5 00076 Turbidity (NTU) 46 0.0 9.5 33.0 87.5 500.0 6875.0 11360.0 00095 Conductance (uS/cm) 47 285.0 310.0 410.0 650.0 740.0 970.0 1010.0 00300 Dissolved oxygen 46 6.6 6.6 7.4 8.4 9.6 11.3 13.0 00400 pH (standard units) 47 8.0 8.0 8.2 8.2 8.3 8.5 8.5 00452 CO3 (filtered) 47 0.0 0.0 0.0 0.0 0.0 6.0 8.0 00453 HCO3 (filtered) 47 80.0 91.0 106.0 134.0 150.0 165.0 193.0 39086 Alk (filtered, as CaCO3) 47 66.0 74.0 87.0 111.0 126.0 138.0 158.0 70331 % finer than 62 microns 44 20.0 25.0 50.5 74.5 96.5 100.0 100.0 80154 Suspended sediment 45 51.0 112.0 302.0 1088.0 2010.0 23049.0 29335.0
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 45 22 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 0.043 0.090
00613 NO2-N .010 45 11 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.012
00623 Org+NH3-N (filtered) .200 45 60 < 0.200 < 0.200 < 0.200 0.178 0.200 0.206 0.300
00625 Org+NH3-N (whole-water) .200 45 93 < 0.200 < 0.200 0.348 0.541 1.396 6.608 11.00
00631 NO2+NO3-N .050 45 91 < 0.050 < 0.050 0.107 0.203 0.376 0.961 1.542
00665 Total P (whole-water) .010 45 100 0.010 0.033 0.081 0.198 0.634 2.088 8.037
00666 Total P (filtered) .050 45 49 < 0.050 < 0.050 < 0.050 < 0.050 0.015 0.050 0.212
00671 PO4-P .010 45 78 < 0.010 < 0.010 0.001 0.006 0.010 0.019 0.020
00681 DOC .300 39 100 1.700 2.200 2.500 2.850 3.400 5.600 6.400
00689 SOC .200 44 77 0.500 0.655 1.100 2.076 4.850 > 20.00 > 25.00
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 46 100 33.21 33.43 41.11 62.45 73.36 95.00 100.0
00925 Magnesium .010 46 100 5.960 6.506 8.400 14.96 21.46 26.31 32.00
00930 Sodium .200 46 100 13.43 14.52 20.16 38.34 50.54 89.00 128.9
00935 Potassium .010 46 100 1.340 1.540 1.770 2.405 2.770 3.270 6.300
00940 Chloride .010 46 100 3.350 3.988 6.260 11.98 15.58 18.53 22.00
00945 Sulfate .010 46 100 55.93 64.92 96.59 177.0 237.4 309.7 360.0
00950 Fluoride .100 46 100 0.100 0.185 0.257 0.301 0.332 0.400 0.618
00955 Silica .010 46 100 2.956 5.382 6.377 7.710 8.275 9.548 11.00
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 33 < 2.0 < 2.0 < 2.0 < 2.0 1.3 2.0 2.2
01005 Barium 1.0 34 100 24.3 52.1 59.8 70.8 90.7 129.0 188.0
01010 Beryllium 1.0 33 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 45 98 < 16.0 20.1 27.4 49.9 61.1 72.3 78.1
01025 Cadmium 1.0 33 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 33 45 < 1.0 < 1.0 < 1.0 < 1.0 1.5 5.5 7.1
01035 Cobalt 3.0 34 3 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 3.0
01040 Copper 1.0 33 100 1.0 1.2 1.6 1.9 2.5 4.0 13.0
01046 Iron 10.0 46 13 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0 16.0
01049 Lead 1.0 33 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 34 29 < 1.0 < 1.0 < 1.0 < 1.0 1.0 26.8 88.4
01060 Molybdenum 10.0 34 85 < 10.0 < 10.0 1.2 1.7 2.0 4.0 10.0
01065 Nickel 1.0 34 53 < 1.0 < 1.0 < 1.0 1.0 1.3 3.0 5.9
01075 Silver 1.0 34 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 46 100 356.2 397.8 538.9 863.7 1031 1300 1400
01085 Vanadium 10.0 46 2 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0
01090 Zinc 1.0 33 85 < 1.0 < 1.0 1.4 1.7 2.9 12.8 14.3
01095 Antimony 1.0 33 6 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.3 2.0
01106 Aluminum 1.0 34 97 < 1.0 1.4 2.6 5.6 10.4 20.3 20.5
01130 Lithium 4.0 46 100 9.3 12.3 17.0 24.1 31.5 36.2 39.7
01145 Selenium 2.4 45 38 < 2.4 < 2.4 < 2.4 < 2.4 1.4 2.4 2.4
22703 Uranium 1.0 33 73 < 1.0 < 1.0 < 1.0 1.8 2.4 4.0 4.3
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 42 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 42 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .005 42 2 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.005
04037 Prometon .018 42 33 < 0.018 < 0.018 < 0.018 < 0.018 0.018 0.018 0.018
04040 Desethyl atrazine .004 42 38 < 0.004 < 0.004 < 0.004 < 0.004 0.004 0.007 0.009
04041 Cyanazine .004 42 2 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.006
04095 Fonofos .003 42 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 42 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 42 2 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .004 42 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39341 gamma-HCH .004 42 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 42 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 42 12 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.005 0.014
39532 Malathion .005 42 19 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.008 0.013
39542 Parathion .004 42 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .006 42 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
39632 Atrazine .011 42 45 < 0.011 < 0.011 < 0.011 < 0.011 0.006 0.009 0.011
46342 Alachlor .005 42 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
49260 Acetochlor .010 42 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82630 Metribuzin .004 42 2 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.010
82660 Diethylanaline .003 42 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 42 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003
82663 Ethalfluralin .004 42 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 42 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 42 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .010 42 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82667 Methyl parathion .006 42 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .002 42 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.004
82669 Pebulate .004 42 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 42 7 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.082
82671 Molinate .004 42 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 42 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 42 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.004
82674 Carbofuran .010 42 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82675 Terbufos .013 42 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 42 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 42 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 42 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82679 Propanil .004 42 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .009 42 0 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009
82681 Thiobencarb .002 42 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 42 36 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.002 0.007
82683 Pendimethalin .004 42 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .003 42 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .100 41 0 < 0.100 < 0.100 < 0.100 < 0.100 < 0.100 < 0.100 < 0.100
82686 Azinphos methyl .001 41 5 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.205
82687 Permethrin .005 42 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 42 100 83.50 87.50 94.64 102.9 108.6 118.1 130.4
91064 Terbuthylazin (%) .100 28 100 95.20 95.68 103.9 111.0 114.1 128.7 139.2
91065 HCH alpha-D6 (%) .100 42 100 64.70 80.30 89.17 96.46 104.8 111.3 138.3
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 35 97 < 0.10 0.10 0.70 0.90 1.30 6.80 9.60
29818 Arsenic (ppm) 0.10 35 97 < 0.10 2.30 3.50 4.40 5.70 7.40 8.20
29820 Barium (ppm) 1.00 34 100 < 170.0 200.0 430.0 540.0 670.0 800.0 820.0
29822 Beryllium (ppm) 0.10 35 97 < 0.10 0.50 0.90 1.10 1.60 2.50 2.60
29826 Cadmium (ppm) 0.10 35 89 < 0.10 < 0.10 0.10 0.20 0.40 0.60 0.70
29829 Chromium (ppm) 1.00 35 94 < 1.00 < 1.00 35.00 43.00 58.00 86.00 91.00
29832 Copper (ppm) 1.00 35 97 < 1.00 3.00 12.00 16.00 23.00 32.00 35.00
29836 Lead (ppm) 1.00 35 97 < 1.00 11.00 17.00 22.00 30.00 51.00 75.00
29839 Manganese (ppm) 10.0 35 97 < 10.00 190.0 340.0 400.0 500.0 630.0 700.0
29841 Mercury (ppm) 0.01 35 74 < 0.01 < 0.01 < 0.01 0.02 0.02 0.06 0.18
29843 Molybdenum (ppm) 5.00 35 23 < 5.00 < 5.00 < 5.00 < 5.00 < 7.00 25.00 25.00
29845 Nickel (ppm) 1.00 35 94 < 1.00 < 1.00 18.00 22.00 39.00 52.00 71.00
29847 Selenium (ppm) 0.10 35 94 < 0.10 < 0.10 0.20 0.30 0.50 0.90 1.00
29850 Silver (ppm) 0.50 35 9 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 2.50 5.00
29853 Vanadium (ppm) 1.00 35 97 < 1.00 10.00 30.00 43.00 67.00 100.0 120.0
29855 Zinc (ppm) 1.00 34 100 < 20.00 30.00 60.00 75.00 100.0 150.0 160.0
30221 Aluminum (%) 0.10 35 97 < 0.10 2.60 4.10 5.00 6.50 9.20 9.50
30244 Total carbon (%) 0.10 34 91 < 0.10 < 0.10 0.70 1.05 1.90 3.10 3.80
30269 Iron (%) 0.10 35 97 < 0.10 0.50 1.20 1.50 2.50 4.00 4.30
30292 Phosphorus (%) 0.01 35 97 < 0.01 0.01 0.03 0.04 0.05 0.06 0.07
30308 Sulfur (%) 0.10 29 76 < 0.10 < 0.10 0.10 0.20 1.00 3.10 5.30
30317 Titanium (%) 0.01 34 100 < 0.10 0.10 0.18 0.20 0.30 0.40 0.40
35031 Cobalt (ppm) 1.00 35 97 < 1.00 3.00 5.00 6.00 10.00 14.00 15.00
35040 Strontium (ppm) 0.01 34 100 < 120.0 160.0 180.0 260.0 350.0 700.0 1300
35046 Uranium (ppm) 50.0 35 0 < 50.00 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 500.0
35050 Lithium (ppm) 1.00 35 97 < 1.00 6.00 16.00 23.00 32.00 48.00 51.00
49955 Thallium (ppm) 50.0 35 0 < 50.00 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 500.0
50279 Sediment (mg/L) 1.00 35 100 16.00 82.00 412.0 1195 2819 21471 21521
50465 Organic carbon (%) 0.10 34 88 < 0.10 < 0.10 0.30 0.60 0.90 1.60 2.00
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