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 8,450 9,100 13,600 28,000 55,900 140,000 420,000 Cubic meters per second 1,827 239 258 385 793 1,583 3,964 11,893
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) 74 4.9 6.3 7.7 10.1 15.2 21.2 22.9 00076 Turbidity (NTU) 72 0.5 1.8 3.0 7.4 20.0 98.0 270.0 00095 Conductance (uS/cm) 74 37.3 48.5 57.6 68.6 80.0 91.2 101.0 00300 Dissolved oxygen 71 7.5 8.1 10.4 12.2 13.2 14.5 15.0 00400 pH (standard units) 74 6.6 6.8 7.1 7.2 7.3 7.6 7.8 00452 CO3 (filtered) 74 0.0 0.0 0.0 0.0 0.0 0.0 0.0 00453 HCO3 (filtered) 74 13.0 17.0 24.0 28.5 33.0 38.0 39.0 39086 Alk (filtered, as CaCO3) 74 11.0 14.0 20.0 23.5 27.0 31.0 32.0 70331 % finer than 62 microns 73 74.0 83.0 95.0 97.0 98.0 99.0 99.0 80154 Suspended sediment 74 3.0 5.0 8.0 15.5 49.0 224.0 456.0
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 74 95 < 0.015 < 0.015 0.027 0.040 0.055 0.086 0.150
00613 NO2-N .010 74 96 < 0.010 0.004 0.006 0.010 0.011 0.016 0.020
00623 Org+NH3-N (filtered) .200 74 64 < 0.200 < 0.200 < 0.200 0.171 0.200 0.200 0.300
00625 Org+NH3-N (whole-water) .200 74 78 < 0.200 < 0.200 0.200 0.220 0.284 0.500 0.656
00631 NO2+NO3-N .050 74 100 0.035 0.200 0.330 0.545 0.707 0.885 0.948
00665 Total P (whole-water) .010 74 100 0.012 0.029 0.050 0.070 0.090 0.190 0.440
00666 Total P (filtered) .010 74 89 < 0.010 < 0.010 0.020 0.030 0.040 0.070 0.081
00671 PO4-P .010 74 100 0.006 0.013 0.021 0.027 0.035 0.056 0.071
00681 DOC .300 72 100 1.100 1.200 1.400 1.644 2.000 3.000 4.000
00689 SOC .200 73 97 < 0.200 0.200 0.300 0.500 0.900 3.200 9.300
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 72 100 2.900 4.100 5.082 5.894 6.639 7.197 7.636
00925 Magnesium .010 72 100 0.930 1.400 1.700 1.904 2.203 2.471 2.623
00930 Sodium .200 72 100 2.200 2.700 3.496 4.419 5.313 8.080 8.746
00935 Potassium .010 72 100 0.470 0.590 0.680 0.730 0.895 1.130 1.240
00940 Chloride .010 72 100 1.900 2.280 2.784 3.464 4.177 5.780 6.760
00945 Sulfate .010 73 100 1.402 1.785 2.394 2.940 3.467 5.030 6.100
00950 Fluoride .100 73 3 < 0.100 < 0.100 < 0.100 < 0.100 < 0.100 < 0.100 0.100
00955 Silica .010 72 100 9.800 12.00 13.92 14.99 16.00 16.86 17.25
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 72 1 < 2.0 < 2.0 < 2.0 < 2.0 < 2.0 < 2.0 2.0
01005 Barium 1.0 52 100 3.4 4.0 5.0 5.9 6.4 7.3 14.0
01010 Beryllium 1.0 52 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 67 6 < 16.0 < 16.0 < 16.0 < 16.0 < 16.0 17.3 30.0
01025 Cadmium 1.0 52 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 5.0 52 4 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 5.0
01035 Cobalt 3.0 52 0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0
01040 Copper 1.0 52 67 < 1.0 < 1.0 < 1.0 1.0 1.6 3.0 4.0
01046 Iron 3.0 72 100 16.2 19.6 26.4 36.3 46.3 140.0 240.0
01049 Lead 1.0 52 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 52 94 < 1.0 < 1.0 5.2 8.2 13.3 26.0 41.0
01060 Molybdenum 10.0 52 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01065 Nickel 1.0 52 13 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.3 7.2
01075 Silver 1.0 52 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 72 100 20.0 27.1 33.5 36.6 40.4 45.0 49.2
01085 Vanadium 250 72 1 < 250.0 < 250.0 < 250.0 < 250.0 < 250.0 < 250.0 250.0
01090 Zinc 1.0 52 92 < 1.0 < 1.0 1.3 2.0 3.0 7.0 9.0
01095 Antimony 1.0 51 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 1.0 52 100 2.6 3.0 5.3 8.9 33.0 141.0 159.0
01130 Lithium 6.0 72 3 < 6.0 < 6.0 < 6.0 < 6.0 < 6.0 < 6.0 6.0
01145 Selenium 2.4 72 1 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4
22703 Uranium 1.0 51 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 73 4 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 0.007
04028 Butylate .002 73 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .005 73 93 < 0.005 < 0.005 0.011 0.016 0.031 0.082 0.157
04037 Prometon .018 73 14 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 0.018 0.018
04040 Desethyl atrazine .002 73 84 < 0.002 < 0.002 0.004 0.006 0.009 0.016 0.020
04041 Cyanazine .004 73 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
04095 Fonofos .003 73 7 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.004 0.007
34253 alpha-HCH .002 73 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 73 8 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.006
38933 Chlorpyrifos .004 73 51 < 0.004 < 0.004 < 0.004 0.004 0.004 0.010 0.014
39341 gamma-HCH .004 73 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 73 1 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.001
39415 Metolachlor .002 73 95 < 0.002 < 0.002 0.007 0.016 0.027 0.075 0.152
39532 Malathion .005 73 3 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.011
39542 Parathion .004 73 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 73 40 < 0.002 < 0.002 < 0.002 < 0.002 0.004 0.006 0.011
39632 Atrazine .001 73 97 < 0.001 0.003 0.013 0.039 0.090 0.217 0.328
46342 Alachlor .002 73 3 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003
49260 Acetochlor .002 73 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82630 Metribuzin .004 73 51 < 0.004 < 0.004 < 0.004 0.006 0.022 0.055 0.095
82660 Diethylanaline .003 73 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 73 15 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.006 0.009
82663 Ethalfluralin .004 73 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 73 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 73 51 < 0.007 < 0.007 < 0.007 0.007 0.013 0.032 0.039
82666 Linuron .002 73 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 73 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .010 73 21 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.026
82669 Pebulate .004 73 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 73 22 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.011 0.018
82671 Molinate .004 73 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 73 18 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.012 0.029
82673 Benfluralin .002 73 1 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
82674 Carbofuran .004 73 14 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.016 0.268
82675 Terbufos .013 73 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 73 53 < 0.003 < 0.003 < 0.003 0.004 0.014 0.040 0.082
82677 Disulfoton .017 73 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .008 73 12 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 0.006 0.047
82679 Propanil .004 73 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .007 73 27 < 0.007 < 0.007 < 0.007 < 0.007 0.004 0.009 0.041
82681 Thiobencarb .002 73 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 73 4 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
82683 Pendimethalin .030 73 5 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030 0.004 0.030
82684 Napropamide .003 73 33 < 0.003 < 0.003 < 0.003 < 0.003 0.004 0.013 0.023
82685 Propargite .070 73 1 < 0.070 < 0.070 < 0.070 < 0.070 < 0.070 < 0.070 0.070
82686 Azinphos methyl .010 73 1 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.032
82687 Permethrin .005 73 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 73 100 66.90 83.90 93.04 102.8 109.9 123.0 160.0
91064 Terbuthylazin (%) .100 55 100 79.60 92.36 103.0 112.3 121.0 133.3 157.0
91065 HCH alpha-D6 (%) .100 73 100 58.50 79.80 91.10 97.30 105.0 124.5 143.0
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 54 100 0.50 0.60 0.80 1.00 1.20 1.60 2.00
29818 Arsenic (ppm) 0.10 54 100 6.50 6.70 7.80 8.30 9.40 10.20 11.10
29820 Barium (ppm) 1.00 54 100 90.00 380.0 420.0 460.0 500.0 550.0 760.0
29822 Beryllium (ppm) 0.10 54 100 1.10 1.10 1.30 1.50 1.50 1.70 1.90
29826 Cadmium (ppm) 0.10 53 89 < 0.10 < 0.10 0.20 0.30 0.50 0.60 0.80
29829 Chromium (ppm) 1.00 54 91 < 1.00 < 1.00 69.00 78.00 88.00 150.0 210.0
29832 Copper (ppm) 1.00 54 100 14.00 43.00 51.00 57.00 66.00 120.0 390.0
29836 Lead (ppm) 1.00 54 100 8.00 14.00 17.00 22.50 31.00 60.00 120.0
29839 Manganese (ppm) 10.0 54 100 1100 1200 1400 1800 3100 3700 4100
29841 Mercury (ppm) 0.01 44 95 < 0.01 0.04 0.06 0.08 0.12 0.16 0.18
29843 Molybdenum (ppm) 5.00 52 13 < 4.00 < 5.00 < 5.00 < 10.00 < 11.50 25.00 50.00
29845 Nickel (ppm) 1.00 54 91 < 1.00 < 1.00 42.00 44.50 52.00 86.00 140.0
29847 Selenium (ppm) 0.10 54 98 < 0.10 0.20 0.30 0.40 0.50 0.50 0.60
29850 Silver (ppm) 0.50 54 15 < 0.50 < 0.50 < 0.70 < 1.00 < 2.50 5.00 5.00
29853 Vanadium (ppm) 1.00 54 100 130.0 140.0 150.0 160.0 170.0 180.0 190.0
29855 Zinc (ppm) 1.00 54 100 40.00 110.0 130.0 140.0 160.0 190.0 250.0
30221 Aluminum (%) 0.10 52 100 6.20 6.80 7.60 8.35 9.05 9.60 9.70
30244 Total carbon (%) 0.10 49 92 < 0.10 < 0.10 2.60 3.80 5.00 6.60 7.40
30269 Iron (%) 0.10 54 100 4.70 5.20 5.40 5.80 6.10 6.60 6.60
30292 Phosphorus (%) 0.01 54 100 0.12 0.13 0.16 0.18 0.22 0.25 0.30
30308 Sulfur (%) 0.10 45 73 < 0.10 < 0.10 < 0.10 0.20 0.30 0.50 3.30
30317 Titanium (%) 0.01 52 100 0.51 0.59 0.61 0.70 0.71 0.80 0.81
35031 Cobalt (ppm) 1.00 54 100 21.00 23.00 24.00 25.00 27.00 30.00 32.00
35040 Strontium (ppm) 0.01 54 100 190.0 190.0 220.0 230.0 250.0 300.0 320.0
35046 Uranium (ppm) 50.0 52 0 < 50.00 < 50.00 < 75.00 < 100.0 < 250.0 < 250.0 250.0
35050 Lithium (ppm) 1.00 54 100 19.00 21.00 24.00 27.00 30.00 37.00 160.0
49955 Thallium (ppm) 50.0 52 0 < 50.00 < 50.00 < 75.00 < 100.0 < 250.0 < 250.0 250.0
50279 Sediment (mg/L) 1.00 53 100 4.50 5.00 8.00 11.00 37.00 209.0 479.0
50465 Organic carbon (%) 0.10 40 88 < 0.10 < 0.10 2.05 3.60 4.25 5.75 7.10
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