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 10,471 15,470 28,504 38,666 73,217 163,531 310,742 Cubic meters per second 1,827 297 438 807 1,095 2,073 4,631 8,799
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) 50 4.0 7.0 10.9 17.0 26.5 29.5 30.0 00076 Turbidity (NTU) 50 1.9 2.3 3.1 4.8 10.0 19.0 60.0 00095 Conductance (uS/cm) 50 124.0 130.0 146.0 152.0 173.0 205.0 218.0 00300 Dissolved oxygen 45 5.3 5.5 7.4 9.6 11.6 13.9 16.3 00400 pH (standard units) 50 6.7 7.0 7.3 7.5 7.7 8.3 8.6 00453 HCO3 (filtered) 48 31.0 48.0 55.5 59.5 67.5 79.0 90.0 39086 Alk (filtered, as CaCO3) 47 25.0 39.0 46.0 49.0 55.0 64.0 74.0 70331 % finer than 62 microns 49 77.3 81.5 95.1 97.5 98.3 99.7 99.7 80154 Suspended sediment 49 2.0 3.0 7.0 9.0 12.0 22.2 39.0
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 50 70 < 0.020 < 0.020 < 0.020 0.033 0.051 0.066 0.125
00613 NO2-N .010 50 50 < 0.010 < 0.010 < 0.010 < 0.010 0.015 0.030 0.039
00623 Org+NH3-N (filtered) .200 50 74 < 0.200 < 0.200 < 0.200 0.200 0.212 0.277 0.298
00625 Org+NH3-N (whole-water) .200 50 94 < 0.200 < 0.200 0.233 0.290 0.354 0.448 0.502
00631 NO2+NO3-N .050 50 94 < 0.050 < 0.050 0.121 0.270 0.405 0.611 0.720
00665 Total P (whole-water) .010 50 98 < 0.010 0.016 0.043 0.053 0.062 0.090 0.166
00666 Total P (filtered) .050 50 78 < 0.050 < 0.050 0.010 0.020 0.035 0.050 0.059
00671 PO4-P .001 50 96 < 0.001 0.001 0.012 0.020 0.031 0.042 0.056
00681 DOC .300 50 100 0.800 1.800 1.900 2.100 2.300 2.741 3.126
00689 SOC .200 49 98 < 0.200 0.200 0.400 0.505 0.600 1.000 1.008
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 50 100 12.14 14.04 16.24 19.01 20.27 23.62 27.69
00925 Magnesium .010 50 100 2.700 2.756 3.005 3.413 4.200 4.782 5.007
00930 Sodium .200 50 100 3.100 3.704 4.721 5.687 8.086 11.67 12.43
00935 Potassium .010 50 100 1.300 1.310 1.480 1.640 1.800 1.960 2.140
00940 Chloride .010 50 100 3.900 4.187 5.582 7.264 9.180 13.06 13.87
00945 Sulfate .010 50 100 7.430 8.183 9.800 11.00 12.34 16.87 17.56
00950 Fluoride .100 50 12 < 0.100 < 0.100 < 0.100 < 0.100 < 0.100 0.116 0.137
00955 Silica .010 50 100 0.591 1.320 2.524 3.509 4.700 5.700 6.323
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 50 38 < 2.0 < 2.0 < 2.0 < 2.0 1.3 2.0 2.0
01005 Barium 1.0 34 100 16.5 16.9 18.0 19.4 20.6 21.6 22.3
01010 Beryllium 1.0 34 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 50 56 < 16.0 < 16.0 < 16.0 19.1 25.4 30.3 36.9
01025 Cadmium 1.0 34 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 34 26 < 1.0 < 1.0 < 1.0 < 1.0 1.0 2.0 2.4
01035 Cobalt 1.0 34 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01040 Copper 1.0 34 24 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.1 2.0
01046 Iron 10.0 50 56 < 10.0 < 10.0 < 10.0 10.0 12.3 23.0 49.0
01049 Lead 1.0 34 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 34 50 < 1.0 < 1.0 < 1.0 < 1.0 2.0 3.8 4.2
01060 Molybdenum 1.0 34 26 < 1.0 < 1.0 < 1.0 < 1.0 1.0 1.4 1.5
01065 Nickel 1.0 34 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01075 Silver 1.0 34 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 50 100 47.3 49.8 54.7 59.4 66.0 71.1 89.3
01085 Vanadium 10.0 50 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01090 Zinc 1.0 34 79 < 1.0 < 1.0 1.0 1.6 4.3 9.9 13.6
01095 Antimony 1.0 34 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 1.0 34 100 2.4 2.5 3.1 3.9 5.1 14.0 15.0
01130 Lithium 6.0 50 10 < 6.0 < 6.0 < 6.0 < 6.0 < 6.0 6.0 6.0
01145 Selenium 2.4 50 2 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4
22703 Uranium 1.0 34 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 50 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 50 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.017
04035 Simazine .005 50 96 < 0.005 0.006 0.010 0.016 0.023 0.042 0.044
04037 Prometon .018 50 62 < 0.018 < 0.018 < 0.018 0.008 0.018 0.018 0.018
04040 Desethyl atrazine .002 50 100 0.004 0.006 0.009 0.014 0.027 0.046 0.067
04041 Cyanazine .004 50 44 < 0.004 < 0.004 < 0.004 < 0.004 0.012 0.088 0.222
04095 Fonofos .003 50 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 50 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 50 2 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .004 50 26 < 0.004 < 0.004 < 0.004 < 0.004 0.004 0.006 0.009
39341 gamma-HCH .004 50 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 50 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 50 100 0.004 0.004 0.008 0.016 0.054 0.089 0.189
39532 Malathion .005 50 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
39542 Parathion .004 50 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 50 12 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.004 0.004
39632 Atrazine .001 50 100 0.015 0.018 0.029 0.090 0.310 0.496 0.667
46342 Alachlor .005 50 12 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.004 0.005
49260 Acetochlor .002 50 30 < 0.002 < 0.002 < 0.002 < 0.002 0.006 0.014 0.017
82630 Metribuzin .004 50 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82660 Diethylanaline .003 50 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 50 4 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
82663 Ethalfluralin .004 50 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 50 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 50 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .008 50 0 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008
82667 Methyl parathion .006 50 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .002 50 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82669 Pebulate .004 50 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 50 98 < 0.010 0.011 0.016 0.021 0.030 0.034 0.037
82671 Molinate .004 50 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 50 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 50 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
82674 Carbofuran .025 50 0 < 0.025 < 0.025 < 0.025 < 0.025 < 0.025 < 0.025 < 0.025
82675 Terbufos .013 50 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 50 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 50 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 50 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82679 Propanil .004 50 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 50 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82681 Thiobencarb .002 50 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 50 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82683 Pendimethalin .004 50 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .003 50 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .030 50 0 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030
82686 Azinphos methyl .001 50 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82687 Permethrin .005 50 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 50 100 78.30 81.47 96.00 101.8 109.7 122.0 130.6
91064 Terbuthylazin (%) .100 32 100 93.75 95.40 103.3 109.4 122.1 132.7 136.7
91065 HCH alpha-D6 (%) .100 50 100 59.70 75.91 88.90 95.65 100.9 116.6 132.5
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 34 97 < 0.10 1.00 1.20 1.85 2.60 5.70 8.90
29818 Arsenic (ppm) 0.10 34 100 6.60 7.50 10.30 11.95 15.00 18.60 21.00
29820 Barium (ppm) 1.00 34 100 240.0 360.0 450.0 490.0 530.0 700.0 840.0
29822 Beryllium (ppm) 0.10 34 100 0.90 1.10 1.50 1.75 2.00 2.50 2.60
29826 Cadmium (ppm) 0.10 34 94 < 0.20 < 0.20 0.40 0.70 0.90 2.40 3.00
29829 Chromium (ppm) 1.00 34 100 58.00 67.00 84.00 96.00 130.0 260.0 290.0
29832 Copper (ppm) 1.00 34 100 16.00 22.00 26.00 28.50 33.00 76.00 110.0
29836 Lead (ppm) 1.00 34 100 19.00 20.00 28.00 35.00 42.00 120.0 130.0
29839 Manganese (ppm) 10.0 34 100 1500 1500 2300 2850 3900 8700 8800
29841 Mercury (ppm) 0.01 8 63 < 0.01 < 0.01 0.01 0.13 0.22 0.26 0.26
29843 Molybdenum (ppm) 5.00 34 26 < 5.00 < 5.00 < 10.00 < 10.00 15.00 50.00 50.00
29845 Nickel (ppm) 1.00 34 100 37.00 42.00 54.00 63.00 72.00 170.0 190.0
29847 Selenium (ppm) 0.10 34 100 0.50 0.60 0.80 0.80 1.00 2.00 2.20
29850 Silver (ppm) 0.50 34 3 < 0.50 < 0.50 < 0.60 < 1.00 < 1.50 < 5.00 5.00
29853 Vanadium (ppm) 1.00 34 100 44.00 49.00 70.00 84.50 97.00 120.0 130.0
29855 Zinc (ppm) 1.00 34 100 120.0 130.0 190.0 220.0 280.0 480.0 540.0
30221 Aluminum (%) 0.10 34 100 3.60 4.00 5.20 6.00 7.00 8.70 9.40
30244 Total carbon (%) 0.10 16 94 < 0.10 < 0.10 3.25 4.30 5.10 7.30 7.30
30269 Iron (%) 0.10 34 100 2.00 2.10 2.70 3.50 3.80 4.60 5.00
30292 Phosphorus (%) 0.01 34 100 0.10 0.13 0.15 0.19 0.22 0.27 0.27
30308 Sulfur (%) 0.10 14 93 < 0.10 < 0.10 0.20 0.35 0.40 1.10 1.10
30317 Titanium (%) 0.01 34 100 0.19 0.20 0.34 0.39 0.40 0.51 0.54
35031 Cobalt (ppm) 1.00 34 100 10.00 11.00 13.00 16.00 19.00 22.00 23.00
35040 Strontium (ppm) 0.01 34 100 60.00 90.00 120.0 140.0 170.0 330.0 380.0
35046 Uranium (ppm) 50.0 34 0 < 50.00 < 50.00 < 50.00 < 100.0 < 150.0 < 500.0 < 500.0
35050 Lithium (ppm) 1.00 34 100 22.00 24.00 40.00 44.00 55.00 64.00 150.0
49955 Thallium (ppm) 50.0 34 0 < 50.00 < 50.00 < 50.00 < 100.0 < 150.0 < 500.0 < 500.0
50279 Sediment (mg/L) 1.00 34 100 6.00 6.00 9.00 11.00 15.00 24.00 36.00
50465 Organic carbon (%) 0.10 4 50 < 0.10 < 0.10 0.10 1.45 3.45 4.10 4.10
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