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 2,175 5,105 7,767 10,340 11,764 14,696 18,055 Cubic meters per second 1,827 62 145 220 293 333 416 511
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) 25 11.5 12.2 17.0 21.3 28.0 29.0 30.0 00076 Turbidity (NTU) 25 0.4 0.6 1.8 2.6 3.4 4.5 5.6 00095 Conductance (uS/cm) 25 1000.0 1020.0 1060.0 1090.0 1130.0 1260.0 1290.0 00300 Dissolved oxygen 25 7.2 7.3 7.6 8.6 9.4 10.3 10.6 00400 pH (standard units) 25 8.1 8.1 8.2 8.2 8.2 8.3 8.4 00452 CO3 (filtered) 25 0.0 0.0 0.0 0.0 0.0 4.0 4.0 00453 HCO3 (filtered) 25 163.0 168.0 173.0 176.0 181.0 188.0 195.0 39086 Alk (filtered, as CaCO3) 25 138.0 138.0 142.0 144.0 148.0 154.0 160.0 70331 % finer than 62 microns 25 2.8 5.5 39.3 55.3 78.3 93.0 96.7 80154 Suspended sediment 25 5.0 9.0 18.0 28.0 50.0 358.0 559.0
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 25 32 < 0.020 < 0.020 < 0.020 < 0.020 0.023 0.036 0.042
00613 NO2-N .010 25 28 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.029 0.030
00623 Org+NH3-N (filtered) .200 25 72 < 0.200 < 0.200 < 0.200 0.165 0.200 0.200 0.200
00625 Org+NH3-N (whole-water) .200 25 80 < 0.200 < 0.200 0.191 0.200 0.219 0.279 0.321
00631 NO2+NO3-N .050 25 100 0.151 0.151 0.179 0.201 0.222 0.270 0.300
00665 Total P (whole-water) .050 25 56 < 0.050 < 0.050 < 0.050 0.028 0.050 0.077 0.080
00666 Total P (filtered) .050 25 4 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 0.050
00671 PO4-P .010 24 42 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.010 0.010
00681 DOC .300 25 100 2.400 2.400 2.500 2.600 2.700 2.800 2.805
00689 SOC .200 25 88 < 0.200 < 0.200 0.200 0.300 0.300 0.419 0.700
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 25 100 71.46 73.33 75.28 77.39 79.00 85.71 87.00
00925 Magnesium .010 25 100 25.65 26.08 26.91 27.56 28.29 31.39 32.00
00930 Sodium .200 25 100 90.14 93.15 97.34 102.5 108.3 122.1 130.0
00935 Potassium .010 25 100 4.000 4.010 4.190 4.270 4.480 4.720 5.100
00940 Chloride .010 25 100 80.18 80.87 89.89 95.05 98.82 120.0 121.1
00945 Sulfate .010 25 100 237.5 242.0 252.4 262.1 270.4 310.0 320.0
00950 Fluoride .100 25 100 0.302 0.326 0.348 0.376 0.400 0.411 0.420
00955 Silica .010 25 100 7.746 7.772 8.600 9.052 9.373 10.19 10.83
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 25 100 1.5 1.6 2.0 2.0 2.2 2.7 2.8
01005 Barium 1.0 20 100 95.9 96.1 98.7 103.2 106.0 117.5 125.0
01010 Beryllium 1.0 20 5 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.1
01020 Boron 16.0 24 100 120.2 122.7 128.5 137.7 148.3 161.0 166.0
01025 Cadmium 1.0 20 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 5.0 20 60 < 5.0 < 5.0 < 5.0 1.6 2.5 4.3 5.0
01035 Cobalt 1.0 20 5 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 4.0
01040 Copper 1.0 20 60 < 1.0 < 1.0 < 1.0 1.1 1.5 2.3 2.5
01046 Iron 10.0 25 4 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0
01049 Lead 1.0 20 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 20 75 < 1.0 < 1.0 < 1.0 1.5 2.2 4.9 6.2
01060 Molybdenum 1.0 20 100 5.2 5.3 5.6 5.9 6.0 18.2 30.0
01065 Nickel 1.0 20 90 < 1.0 < 1.0 1.1 1.3 1.9 2.8 3.0
01075 Silver 1.0 20 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 25 100 988.7 993.0 1026 1062 1100 1200 1300
01085 Vanadium 10.0 25 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01090 Zinc 1.0 20 75 < 1.0 < 1.0 < 1.0 1.5 4.8 12.2 14.4
01095 Antimony 1.0 20 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 1.0 20 90 < 1.0 < 1.0 1.3 1.9 3.5 7.4 7.4
01130 Lithium 4.0 25 100 40.9 41.9 43.9 46.0 48.6 53.0 57.0
01145 Selenium 2.4 25 92 < 2.4 < 2.4 1.7 2.0 2.0 2.4 2.4
22703 Uranium 1.0 19 100 3.4 3.4 3.8 4.0 4.2 5.0 5.0
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 24 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 24 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .006 24 29 < 0.006 < 0.006 < 0.006 < 0.006 0.005 0.006 0.006
04037 Prometon .018 24 21 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 0.018 0.018
04040 Desethyl atrazine .003 24 29 < 0.003 < 0.003 < 0.003 < 0.003 0.003 0.003 0.003
04041 Cyanazine .004 24 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
04095 Fonofos .003 24 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 24 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 24 4 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .004 24 17 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.005 0.009
39341 gamma-HCH .004 24 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 24 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 24 25 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.004 0.004
39532 Malathion .005 24 8 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.005 0.006
39542 Parathion .004 24 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 24 38 < 0.002 < 0.002 < 0.002 < 0.002 0.004 0.006 0.006
39632 Atrazine .005 24 79 < 0.005 < 0.005 0.003 0.004 0.005 0.006 0.007
46342 Alachlor .007 24 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
49260 Acetochlor .002 24 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82630 Metribuzin .035 24 8 < 0.035 < 0.035 < 0.035 < 0.035 < 0.035 0.024 0.035
82660 Diethylanaline .003 24 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 24 4 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.004
82663 Ethalfluralin .004 24 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 24 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 24 4 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 0.007
82666 Linuron .002 24 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 24 8 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.008
82668 EPTC .006 24 58 < 0.006 < 0.006 < 0.006 0.004 0.006 0.013 0.093
82669 Pebulate .004 24 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .050 24 0 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050
82671 Molinate .004 24 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 24 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 24 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .003 24 8 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.012 0.028
82675 Terbufos .013 24 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 24 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 24 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 24 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82679 Propanil .004 24 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 24 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82681 Thiobencarb .002 24 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 24 33 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.003 0.003
82683 Pendimethalin .004 24 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .003 24 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .500 24 0 < 0.500 < 0.500 < 0.500 < 0.500 < 0.500 < 0.500 < 0.500
82686 Azinphos methyl .010 24 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82687 Permethrin .005 24 4 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.006
91063 Diazinon-d10 (%) .100 24 100 74.97 76.39 91.16 100.0 110.4 117.3 129.6
91064 Terbuthylazin (%) .100 15 100 66.08 66.08 98.17 104.0 112.0 134.9 134.9
91065 HCH alpha-D6 (%) .100 24 100 57.67 71.11 82.00 90.93 101.0 110.4 112.8
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 18 100 0.30 0.30 0.70 0.95 3.40 29.70 29.70
29818 Arsenic (ppm) 0.10 18 100 2.60 2.60 5.20 6.50 8.90 12.30 12.30
29820 Barium (ppm) 1.00 18 100 160.0 160.0 390.0 460.0 530.0 610.0 610.0
29822 Beryllium (ppm) 0.10 18 100 0.20 0.20 0.60 0.80 1.20 1.80 1.80
29826 Cadmium (ppm) 0.10 18 89 < 0.10 < 0.10 0.10 0.30 0.50 1.00 1.00
29829 Chromium (ppm) 1.00 18 100 24.00 24.00 33.00 45.00 72.00 120.0 120.0
29832 Copper (ppm) 1.00 18 100 5.00 5.00 9.00 14.00 19.00 29.00 29.00
29836 Lead (ppm) 1.00 18 100 11.00 11.00 17.00 22.50 28.00 100.0 100.0
29839 Manganese (ppm) 10.0 18 100 220.0 220.0 510.0 695.0 1100 1900 1900
29841 Mercury (ppm) 0.01 15 87 < 0.01 < 0.01 0.01 0.02 0.05 0.15 0.15
29843 Molybdenum (ppm) 5.00 18 22 < 5.00 < 5.00 < 5.00 < 8.00 < 10.00 50.00 50.00
29845 Nickel (ppm) 1.00 18 100 15.00 15.00 19.00 29.00 52.00 77.00 77.00
29847 Selenium (ppm) 0.10 17 100 0.10 0.10 0.80 1.00 1.30 3.00 3.00
29850 Silver (ppm) 0.50 18 11 < 0.50 < 0.50 < 0.50 < 1.00 < 1.00 5.00 5.00
29853 Vanadium (ppm) 1.00 18 100 14.00 14.00 27.00 34.50 47.00 58.00 58.00
29855 Zinc (ppm) 1.00 18 100 20.00 20.00 50.00 70.00 80.00 310.0 310.0
30221 Aluminum (%) 0.10 18 100 1.10 1.10 2.70 3.10 3.70 4.40 4.40
30244 Total carbon (%) 0.10 11 82 < 0.10 < 0.10 0.80 2.30 2.50 3.40 3.40
30269 Iron (%) 0.10 18 100 0.50 0.50 1.10 1.35 1.70 2.20 2.20
30292 Phosphorus (%) 0.01 18 100 0.03 0.03 0.05 0.06 0.07 0.10 0.10
30308 Sulfur (%) 0.10 11 82 < 0.10 < 0.10 0.10 0.80 1.70 2.20 2.20
30317 Titanium (%) 0.01 18 100 0.10 0.10 0.16 0.19 0.20 0.31 0.31
35031 Cobalt (ppm) 1.00 18 100 2.00 2.00 4.00 6.00 6.00 10.00 10.00
35040 Strontium (ppm) 0.01 18 100 130.0 130.0 280.0 405.0 470.0 940.0 940.0
35046 Uranium (ppm) 50.0 18 0 < 50.00 < 50.00 < 50.00 < 100.0 < 100.0 < 500.0 < 500.0
35050 Lithium (ppm) 1.00 18 100 11.00 11.00 24.00 28.00 33.00 41.00 41.00
49955 Thallium (ppm) 50.0 18 0 < 50.00 < 50.00 < 50.00 < 100.0 < 100.0 < 500.0 < 500.0
50279 Sediment (mg/L) 1.00 18 100 7.00 7.00 15.00 30.00 49.00 438.0 438.0
50465 Organic carbon (%) 0.10 13 85 < 0.10 < 0.10 0.30 1.30 1.50 2.60 2.60
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