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 8,460 8,880 14,400 17,400 20,300 25,200 46,700 Cubic meters per second 1,827 240 251 408 493 575 714 1,322
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) 35 9.5 9.7 11.0 13.0 14.5 17.0 20.0 00076 Turbidity (NTU) 35 0.7 1.5 2.9 7.2 70.0 1000.0 1000.0 00095 Conductance (uS/cm) 35 711.0 714.0 752.0 774.0 830.0 854.0 880.0 00300 Dissolved oxygen 32 8.3 9.3 10.0 10.3 10.6 11.2 11.5 00400 pH (standard units) 35 7.7 7.8 8.2 8.2 8.3 8.5 8.5 00452 CO3 (filtered) 35 0.0 0.0 0.0 0.0 0.0 7.0 9.0 00453 HCO3 (filtered) 35 149.0 152.0 159.0 164.0 178.0 184.0 185.0 39086 Alk (filtered, as CaCO3) 35 122.0 125.0 132.0 136.0 147.0 152.0 154.0 70331 % finer than 62 microns 22 13.7 16.0 24.0 37.0 60.1 95.3 100.0 80154 Suspended sediment 33 16.0 17.0 116.0 238.0 441.0 1497.0 1804.0
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 35 31 < 0.020 < 0.020 < 0.020 < 0.020 0.020 0.046 0.048
00613 NO2-N .010 35 23 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.037 0.040
00623 Org+NH3-N (filtered) .200 34 74 < 0.200 < 0.200 < 0.200 0.156 0.200 0.207 0.213
00625 Org+NH3-N (whole-water) .200 33 82 < 0.200 < 0.200 0.186 0.200 0.291 2.201 2.563
00631 NO2+NO3-N .050 35 100 0.140 0.157 0.214 0.246 0.275 0.443 5.800
00665 Total P (whole-water) .010 35 89 < 0.010 < 0.010 0.012 0.042 0.116 1.235 1.443
00666 Total P (filtered) .010 35 34 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.011 0.012
00671 PO4-P .001 35 71 < 0.001 < 0.001 < 0.001 0.002 0.003 0.009 0.009
00681 DOC .300 34 100 2.400 2.600 2.800 2.900 3.000 3.200 4.000
00689 SOC .200 34 71 < 0.100 < 0.200 0.200 0.200 1.300 > 5.000 > 5.000
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 35 100 52.00 55.68 58.38 62.16 64.09 67.69 70.72
00925 Magnesium .010 35 100 18.00 18.60 20.00 21.35 23.00 24.79 25.41
00930 Sodium .200 35 100 55.82 55.82 61.47 64.38 70.90 77.16 77.87
00935 Potassium .010 35 100 2.740 2.750 2.950 3.030 3.150 3.390 3.560
00940 Chloride .010 35 100 43.61 44.76 51.70 54.63 61.39 68.82 70.13
00945 Sulfate .010 35 100 147.7 150.0 159.9 170.0 181.1 192.2 197.5
00950 Fluoride .100 35 100 0.209 0.233 0.248 0.258 0.293 0.305 0.311
00955 Silica .010 35 100 7.151 7.495 7.841 8.227 8.432 8.749 9.033
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 35 100 1.0 1.0 1.3 1.6 2.0 2.2 2.5
01005 Barium 1.0 27 100 72.6 73.0 76.1 82.2 104.5 132.8 171.0
01010 Beryllium 1.0 27 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 35 100 68.8 69.4 72.8 78.3 87.1 95.1 97.0
01025 Cadmium 1.0 27 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 26 62 < 1.0 < 1.0 < 1.0 1.1 1.7 2.3 2.8
01035 Cobalt 1.0 27 7 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.0 6.0
01040 Copper 1.0 27 89 < 1.0 < 1.0 1.2 1.5 1.8 4.2 11.7
01046 Iron 10.0 35 3 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 13.9
01049 Lead 1.0 27 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 27 33 < 1.0 < 1.0 < 1.0 < 1.0 1.8 5.5 12.1
01060 Molybdenum 1.0 27 100 3.0 3.3 3.5 3.7 3.9 4.3 4.3
01065 Nickel 1.0 27 89 < 1.0 < 1.0 1.1 1.3 1.6 2.5 3.4
01075 Silver 1.0 27 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 35 100 618.6 622.8 643.2 685.5 726.2 902.9 919.2
01085 Vanadium 10.0 35 3 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0
01090 Zinc 1.0 27 59 < 1.0 < 1.0 < 1.0 1.1 1.9 3.7 4.5
01095 Antimony 1.0 27 4 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 2.8
01106 Aluminum 1.0 27 93 < 1.0 < 1.0 1.4 1.7 2.1 6.6 10.3
01130 Lithium 4.0 35 100 24.9 24.9 27.5 29.4 31.2 35.6 36.1
01145 Selenium 1.0 35 100 1.0 1.0 1.5 1.8 2.0 2.3 2.5
22703 Uranium 1.0 27 100 2.8 2.8 3.0 3.2 3.4 3.8 3.9
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 35 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 35 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .005 35 6 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.005 0.005
04037 Prometon .018 35 29 < 0.018 < 0.018 < 0.018 < 0.018 0.018 0.018 0.018
04040 Desethyl atrazine .002 35 23 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.004 0.004
04041 Cyanazine .004 35 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
04095 Fonofos .003 35 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 35 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 35 6 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.006
38933 Chlorpyrifos .004 35 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39341 gamma-HCH .004 35 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 35 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 35 86 < 0.002 < 0.002 0.002 0.003 0.004 0.005 0.006
39532 Malathion .005 35 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
39542 Parathion .004 35 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 35 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
39632 Atrazine .001 35 74 < 0.001 < 0.001 < 0.001 0.004 0.005 0.013 0.013
46342 Alachlor .002 35 9 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.003
49260 Acetochlor .002 35 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82630 Metribuzin .004 35 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82660 Diethylanaline .003 35 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 35 3 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
82663 Ethalfluralin .004 35 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 35 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .010 35 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82666 Linuron .002 35 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 35 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .020 35 0 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020
82669 Pebulate .004 35 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 35 14 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.010
82671 Molinate .004 35 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 35 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 35 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .003 35 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82675 Terbufos .013 35 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 35 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 35 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 35 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82679 Propanil .004 35 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 35 3 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.006
82681 Thiobencarb .002 35 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 35 71 < 0.002 < 0.002 < 0.002 0.002 0.002 0.003 0.003
82683 Pendimethalin .004 35 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .003 35 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 34 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .001 35 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82687 Permethrin .005 35 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 35 100 80.98 85.09 94.07 100.0 106.7 120.7 121.2
91064 Terbuthylazin (%) .100 22 100 83.64 95.37 102.0 108.7 116.2 122.8 126.7
91065 HCH alpha-D6 (%) .100 35 100 75.07 79.63 91.01 96.62 103.2 113.8 116.7
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 25 100 0.30 0.40 0.80 0.90 1.20 2.90 6.30
29818 Arsenic (ppm) 0.10 25 100 2.50 3.00 4.10 4.80 5.60 7.90 8.20
29820 Barium (ppm) 1.00 25 100 350.0 360.0 430.0 450.0 490.0 520.0 530.0
29822 Beryllium (ppm) 0.10 25 100 0.60 0.60 0.60 0.80 1.50 2.00 2.10
29826 Cadmium (ppm) 0.10 24 79 < 0.10 < 0.10 0.10 0.20 0.20 0.40 0.40
29829 Chromium (ppm) 1.00 25 100 15.00 26.00 32.00 41.00 51.00 58.00 82.00
29832 Copper (ppm) 1.00 25 100 5.00 5.00 8.00 12.00 17.00 22.00 24.00
29836 Lead (ppm) 1.00 25 100 9.00 9.00 13.00 15.00 19.00 26.00 43.00
29839 Manganese (ppm) 10.0 25 100 210.0 220.0 270.0 310.0 370.0 490.0 520.0
29841 Mercury (ppm) 0.01 25 80 < 0.01 < 0.01 0.01 0.01 0.02 0.04 0.10
29843 Molybdenum (ppm) 5.00 25 12 < 5.00 < 5.00 < 5.00 < 5.00 < 5.00 10.00 25.00
29845 Nickel (ppm) 1.00 25 100 9.00 14.00 18.00 21.00 27.00 33.00 52.00
29847 Selenium (ppm) 0.10 25 100 0.20 0.20 0.20 0.30 0.40 0.60 0.70
29850 Silver (ppm) 0.50 25 0 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 1.00 < 2.50
29853 Vanadium (ppm) 1.00 25 100 15.00 17.00 24.00 34.00 55.00 85.00 86.00
29855 Zinc (ppm) 1.00 25 100 20.00 20.00 30.00 50.00 60.00 80.00 90.00
30221 Aluminum (%) 0.10 25 100 2.10 2.30 2.80 3.40 5.40 7.60 7.70
30244 Total carbon (%) 0.10 24 100 0.20 0.30 1.60 1.90 2.25 3.10 3.60
30269 Iron (%) 0.10 25 100 0.60 0.70 1.00 1.20 2.00 2.70 3.10
30292 Phosphorus (%) 0.01 25 100 0.02 0.02 0.03 0.04 0.05 0.06 0.06
30308 Sulfur (%) 0.10 18 94 < 0.10 < 0.10 0.20 0.25 0.40 1.30 1.30
30317 Titanium (%) 0.01 23 100 0.10 0.10 0.14 0.18 0.26 0.32 0.33
35031 Cobalt (ppm) 1.00 25 100 3.00 3.00 4.00 5.00 8.00 10.00 11.00
35040 Strontium (ppm) 0.01 25 100 120.0 130.0 150.0 180.0 210.0 300.0 330.0
35046 Uranium (ppm) 50.0 25 0 < 50.00 < 50.00 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0
35050 Lithium (ppm) 1.00 25 100 10.00 11.00 16.00 22.00 31.00 47.00 47.00
49955 Thallium (ppm) 50.0 25 0 < 50.00 < 50.00 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0
50279 Sediment (mg/L) 1.00 24 100 33.00 86.00 179.0 385.0 665.5 3097 3474
50465 Organic carbon (%) 0.10 24 100 0.10 0.30 0.40 0.55 0.70 0.90 1.40
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