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 3,190 13,800 38,900 94,900 191,000 364,000 735,000 Cubic meters per second 1,827 90 391 1,102 2,687 5,409 10,307 20,813
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) 65 2.7 4.4 9.2 15.8 24.4 28.1 31.6 00076 Turbidity (NTU) 65 1.0 1.4 3.7 16.0 48.0 140.0 250.0 00095 Conductance (uS/cm) 64 183.0 231.0 295.0 343.0 387.5 580.0 594.0 00300 Dissolved oxygen 61 5.8 6.0 7.6 9.0 10.8 12.3 18.1 00400 pH (standard units) 64 6.8 7.1 7.3 7.4 7.6 7.9 8.0 00453 HCO3 (filtered) 62 47.0 53.0 72.0 82.5 94.0 106.0 117.0 39086 Alk (filtered, as CaCO3) 62 39.0 43.0 59.0 68.0 77.0 87.0 96.0 70331 % finer than 62 microns 62 76.3 88.2 94.2 97.6 99.0 99.8 100.0 80154 Suspended sediment 62 2.0 3.0 10.0 32.3 125.0 463.0 626.0
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 64 77 < 0.020 < 0.020 0.020 0.050 0.072 0.160 0.210
00613 NO2-N .010 64 94 < 0.010 < 0.010 0.020 0.024 0.036 0.080 0.134
00623 Org+NH3-N (filtered) .200 64 86 < 0.200 < 0.200 0.200 0.231 0.300 0.413 0.680
00625 Org+NH3-N (whole-water) .200 64 98 < 0.200 0.222 0.304 0.413 0.600 1.400 1.694
00631 NO2+NO3-N .050 64 100 0.580 0.759 1.020 1.215 1.400 1.669 1.796
00665 Total P (whole-water) .010 64 100 0.019 0.021 0.041 0.077 0.181 0.580 0.853
00666 Total P (filtered) .010 64 89 < 0.010 < 0.010 0.012 0.026 0.040 0.059 0.098
00671 PO4-P .001 64 97 < 0.001 0.001 0.015 0.023 0.036 0.053 0.073
00681 DOC .100 59 98 < 0.100 2.000 2.600 3.016 3.400 4.400 5.500
00689 SOC .200 62 92 0.200 0.300 0.400 0.625 2.000 > 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 65 100 20.00 26.43 32.00 35.45 38.50 43.87 50.49
00925 Magnesium .010 65 100 4.400 6.241 8.361 9.900 11.00 13.81 16.50
00930 Sodium .200 65 100 6.000 7.196 11.25 14.76 20.00 36.26 41.86
00935 Potassium .010 65 100 1.690 1.830 2.100 2.430 2.750 3.650 4.640
00940 Chloride .010 65 100 7.534 8.927 14.38 19.07 24.92 47.65 56.06
00945 Sulfate .010 65 100 25.00 32.66 44.61 55.82 68.22 106.6 120.5
00950 Fluoride .100 65 95 < 0.100 0.100 0.127 0.160 0.200 0.288 0.478
00955 Silica .010 65 100 0.376 1.620 3.713 5.053 5.500 6.189 6.300
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 65 12 < 2.0 < 2.0 < 2.0 < 2.0 < 2.0 2.0 2.1
01005 Barium 1.0 50 100 23.0 26.0 32.5 35.0 41.2 53.6 57.7
01010 Beryllium 10.0 50 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01020 Boron 16.0 62 97 < 16.0 21.6 28.2 35.2 52.2 92.3 103.9
01025 Cadmium 1.0 50 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 5.0 50 38 < 5.0 < 5.0 < 5.0 < 5.0 1.2 2.0 5.0
01035 Cobalt 3.0 50 0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0
01040 Copper 1.0 50 92 < 1.0 < 1.0 1.2 2.0 2.2 3.3 4.3
01046 Iron 10.0 65 55 < 10.0 < 10.0 < 10.0 10.0 12.0 48.0 55.0
01049 Lead 1.0 50 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 50 82 < 1.0 < 1.0 1.0 3.0 5.1 11.7 13.4
01060 Molybdenum 10.0 50 92 < 10.0 < 10.0 1.4 1.9 3.0 7.2 10.0
01065 Nickel 1.0 50 94 < 1.0 < 1.0 1.3 1.7 2.1 3.0 3.6
01075 Silver 1.0 50 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 65 100 85.0 130.6 173.0 206.2 239.4 300.0 342.0
01085 Vanadium 10.0 65 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01090 Zinc 1.0 50 82 < 1.0 < 1.0 1.0 1.4 2.1 4.7 25.8
01095 Antimony 1.0 49 2 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 3.0
01106 Aluminum 1.0 50 100 3.3 5.5 7.0 9.3 10.5 14.0 28.0
01130 Lithium 4.0 65 77 < 4.0 < 4.0 4.0 5.0 7.0 11.1 13.6
01145 Selenium 2.4 65 5 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4
22703 Uranium 1.0 49 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 61 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 61 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.046
04035 Simazine .005 61 97 < 0.005 0.005 0.013 0.032 0.066 0.224 0.340
04037 Prometon .018 61 77 < 0.018 < 0.018 0.008 0.015 0.018 0.034 0.069
04040 Desethyl atrazine .002 61 100 0.004 0.008 0.015 0.020 0.049 0.111 0.174
04041 Cyanazine .010 61 79 < 0.010 < 0.010 0.008 0.019 0.067 0.442 0.840
04095 Fonofos .003 61 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .030 61 3 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030 0.030
34653 p,p DDE .006 61 8 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.006
38933 Chlorpyrifos .010 61 25 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.018
39341 gamma-HCH .004 61 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 61 2 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.006
39415 Metolachlor .002 61 100 0.015 0.019 0.031 0.061 0.230 0.787 1.510
39532 Malathion .005 61 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
39542 Parathion .004 61 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .004 61 43 < 0.004 < 0.004 < 0.004 < 0.004 0.006 0.008 0.016
39632 Atrazine .001 61 100 0.025 0.029 0.060 0.150 0.499 1.490 2.800
46342 Alachlor .002 61 49 < 0.002 < 0.002 < 0.002 < 0.002 0.008 0.076 0.100
49260 Acetochlor .008 61 69 < 0.008 < 0.008 < 0.008 0.013 0.066 0.227 0.339
82630 Metribuzin .075 61 31 < 0.075 < 0.075 < 0.075 < 0.075 0.014 0.057 0.075
82660 Diethylanaline .003 61 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 61 7 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.005
82663 Ethalfluralin .004 61 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 61 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 61 2 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 0.007
82666 Linuron .002 61 5 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.030
82667 Methyl parathion .006 61 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .010 61 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82669 Pebulate .004 61 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .013 61 46 < 0.013 < 0.013 < 0.013 < 0.013 0.010 0.013 0.018
82671 Molinate .004 61 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 61 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 61 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .015 61 7 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015 0.011 0.015
82675 Terbufos .013 61 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 61 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 61 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .004 61 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82679 Propanil .004 61 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .012 61 23 < 0.012 < 0.012 < 0.012 < 0.012 < 0.012 0.012 0.025
82681 Thiobencarb .002 61 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 61 5 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
82683 Pendimethalin .004 61 7 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004 0.008
82684 Napropamide .003 61 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .090 60 0 < 0.090 < 0.090 < 0.090 < 0.090 < 0.090 < 0.090 < 0.090
82686 Azinphos methyl .200 61 0 < 0.200 < 0.200 < 0.200 < 0.200 < 0.200 < 0.200 < 0.200
82687 Permethrin .005 61 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 61 100 82.80 85.60 97.58 103.8 112.6 128.4 139.5
91064 Terbuthylazin (%) .100 46 100 0.002 89.17 105.0 113.9 121.8 136.2 150.6
91065 HCH alpha-D6 (%) .100 61 100 72.20 81.40 87.59 96.70 102.0 113.0 120.9
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 47 98 < 0.10 0.80 1.10 1.40 2.00 7.40 8.50
29818 Arsenic (ppm) 0.10 47 100 6.10 9.60 12.30 13.80 16.10 18.00 24.00
29820 Barium (ppm) 1.00 47 100 240.0 260.0 450.0 510.0 570.0 590.0 640.0
29822 Beryllium (ppm) 0.10 47 98 < 0.60 0.90 2.00 2.40 2.80 3.10 3.30
29826 Cadmium (ppm) 0.10 47 98 < 0.30 0.40 0.50 0.60 0.70 1.50 3.90
29829 Chromium (ppm) 1.00 47 94 < 1.00 < 1.00 71.00 79.00 93.00 210.0 290.0
29832 Copper (ppm) 1.00 47 100 25.00 28.00 31.00 36.00 42.00 73.00 140.0
29836 Lead (ppm) 1.00 47 100 14.00 28.00 33.00 37.00 43.00 82.00 850.0
29839 Manganese (ppm) 10.0 47 100 510.0 820.0 1400 1900 2300 2800 3300
29841 Mercury (ppm) 0.01 34 85 < 0.01 < 0.01 0.04 0.07 0.10 0.12 0.16
29843 Molybdenum (ppm) 5.00 47 26 < 5.00 < 5.00 < 5.00 < 10.00 25.00 30.00 50.00
29845 Nickel (ppm) 1.00 47 94 < 1.00 < 1.00 51.00 59.00 74.00 150.0 210.0
29847 Selenium (ppm) 0.10 47 98 < 0.10 0.50 0.80 1.00 1.40 2.00 2.40
29850 Silver (ppm) 0.50 47 13 < 0.50 < 0.50 < 0.50 < 1.00 < 2.50 5.00 15.00
29853 Vanadium (ppm) 1.00 47 100 27.00 43.00 99.00 110.0 110.0 120.0 130.0
29855 Zinc (ppm) 1.00 47 100 120.0 140.0 170.0 190.0 260.0 340.0 680.0
30221 Aluminum (%) 0.10 47 100 1.60 2.90 6.50 7.50 8.10 9.00 10.40
30244 Total carbon (%) 0.10 38 89 < 0.10 < 0.10 2.50 3.05 3.70 4.70 5.30
30269 Iron (%) 0.10 47 100 1.00 2.20 3.90 4.20 4.50 5.00 5.40
30292 Phosphorus (%) 0.01 47 100 0.05 0.10 0.13 0.14 0.15 0.21 0.28
30308 Sulfur (%) 0.10 36 86 < 0.10 < 0.10 0.10 0.30 0.85 2.30 2.40
30317 Titanium (%) 0.01 47 100 0.10 0.14 0.40 0.49 0.50 0.52 0.57
35031 Cobalt (ppm) 1.00 47 98 < 6.00 10.00 20.00 24.00 29.00 37.00 40.00
35040 Strontium (ppm) 0.01 47 100 100.0 110.0 120.0 160.0 250.0 550.0 750.0
35046 Uranium (ppm) 50.0 47 4 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 250.0 500.0
35050 Lithium (ppm) 1.00 47 100 31.00 35.00 53.00 59.00 63.00 75.00 78.00
49955 Thallium (ppm) 50.0 47 0 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 250.0 < 500.0
50279 Sediment (mg/L) 1.00 47 100 3.20 8.00 14.00 57.00 222.0 511.0 551.0
50465 Organic carbon (%) 0.10 33 85 < 0.10 < 0.10 2.10 2.50 3.00 3.70 4.20
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