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 15,500 25,700 34,500 44,000 58,500 76,400 116,000 Cubic meters per second 1,827 439 728 977 1,246 1,657 2,163 3,285
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) 72 0.5 1.0 6.0 15.8 23.3 26.0 29.0 00076 Turbidity (NTU) 72 1.1 6.2 16.5 24.0 47.5 320.0 520.0 00095 Conductance (uS/cm) 72 519.0 609.0 769.5 800.0 828.0 900.0 957.0 00300 Dissolved oxygen 72 4.8 5.9 7.7 9.0 11.4 13.1 13.3 00400 pH (standard units) 72 8.0 8.1 8.2 8.3 8.4 8.6 8.6 00452 CO3 (filtered) 70 0.0 0.0 0.0 0.0 0.0 3.0 9.0 00453 HCO3 (filtered) 69 144.0 168.0 189.0 202.0 216.0 235.0 250.0 39086 Alk (filtered, as CaCO3) 71 118.0 138.0 156.0 166.0 177.0 192.0 205.0 70331 % finer than 62 microns 69 14.0 20.0 26.0 34.2 54.8 87.0 93.1 80154 Suspended sediment 71 156.0 187.0 282.0 322.0 542.0 2190.0 2440.0
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 72 74 < 0.020 < 0.020 < 0.020 0.034 0.087 0.250 0.540
00613 NO2-N .010 72 63 < 0.010 < 0.010 < 0.010 0.010 0.019 0.040 0.080
00623 Org+NH3-N (filtered) .200 72 97 < 0.200 0.200 0.234 0.294 0.396 0.700 1.300
00625 Org+NH3-N (whole-water) .200 71 100 0.377 0.400 0.500 0.600 0.878 2.681 4.818
00631 NO2+NO3-N .050 72 100 0.062 0.188 0.440 0.847 1.315 3.078 3.584
00665 Total P (whole-water) .010 72 100 0.050 0.070 0.096 0.156 0.253 0.890 2.122
00666 Total P (filtered) .050 72 92 < 0.050 < 0.050 0.013 0.031 0.058 0.090 0.106
00671 PO4-P .001 72 99 < 0.001 0.004 0.016 0.029 0.051 0.075 0.120
00681 DOC .300 71 100 0.500 3.324 3.500 3.900 5.000 6.800 8.400
00689 SOC .200 68 84 0.200 0.400 1.024 1.579 3.200 > 5.000 > 17.00
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 39.83 51.85 59.80 62.86 67.35 81.97 95.31
00925 Magnesium .010 72 100 14.00 19.00 22.89 24.21 25.67 34.19 40.06
00930 Sodium .200 72 100 32.00 40.00 54.59 60.96 67.89 74.46 77.12
00935 Potassium .010 72 100 3.900 5.020 5.525 5.995 6.540 7.200 7.970
00940 Chloride .010 72 100 7.300 10.59 12.00 13.00 13.85 16.23 17.02
00945 Sulfate .010 72 100 120.0 140.0 200.0 213.2 229.1 257.5 266.4
00950 Fluoride .100 72 100 0.300 0.349 0.400 0.438 0.481 0.511 0.576
00955 Silica .010 72 100 4.165 6.200 7.350 8.860 10.28 11.59 12.74
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 72 99 < 1.0 1.0 1.9 2.0 2.3 3.3 3.7
01005 Barium 1.0 36 100 34.0 43.7 54.3 61.2 74.1 98.7 121.9
01010 Beryllium 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 70 100 67.9 73.5 98.2 108.7 118.0 125.8 138.4
01025 Cadmium 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 36 78 < 1.0 < 1.0 1.1 2.1 3.1 4.7 7.7
01035 Cobalt 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01040 Copper 1.0 36 100 1.5 1.6 1.8 2.0 2.2 2.6 3.0
01046 Iron 10.0 72 17 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 11.0 68.1
01049 Lead 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 36 50 < 1.0 < 1.0 < 1.0 < 1.0 6.7 19.0 84.0
01060 Molybdenum 1.0 36 100 2.0 2.0 2.7 3.0 3.2 3.8 3.9
01065 Nickel 1.0 36 100 1.8 2.0 2.3 2.7 3.0 4.0 4.3
01075 Silver 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 72 100 280.0 370.0 492.3 538.3 554.7 579.6 600.6
01085 Vanadium 10.0 72 4 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0
01090 Zinc 1.0 36 39 < 1.0 < 1.0 < 1.0 < 1.0 1.3 5.1 6.2
01095 Antimony 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 1.0 36 97 < 1.0 1.0 1.7 2.2 3.0 20.3 22.4
01130 Lithium 4.0 72 100 25.0 29.0 43.3 47.5 50.6 56.0 58.4
01145 Selenium 2.4 72 97 < 2.4 1.4 2.0 2.0 2.7 3.6 120.0
22703 Uranium 1.0 36 100 2.8 3.0 4.0 4.4 4.9 5.6 6.9
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 71 3 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 0.007
04028 Butylate .002 71 1 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.007
04035 Simazine .006 71 51 < 0.006 < 0.006 < 0.006 0.005 0.006 0.012 0.020
04037 Prometon .018 71 82 < 0.018 < 0.018 0.004 0.006 0.012 0.018 0.050
04040 Desethyl atrazine .002 71 100 0.004 0.005 0.007 0.011 0.020 0.070 0.160
04041 Cyanazine .010 71 80 < 0.010 < 0.010 0.006 0.011 0.032 0.330 0.980
04095 Fonofos .003 71 3 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.009
34253 alpha-HCH .002 71 1 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.045
34653 p,p DDE .006 71 4 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .004 71 1 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.016
39341 gamma-HCH .004 71 1 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.007
39381 Dieldrin .001 71 3 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.007
39415 Metolachlor .002 71 100 0.006 0.007 0.014 0.037 0.141 0.670 1.600
39532 Malathion .005 71 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
39542 Parathion .004 71 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .009 71 6 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 0.005 0.022
39632 Atrazine .001 71 100 0.017 0.018 0.032 0.080 0.171 1.080 4.000
46342 Alachlor .004 71 49 < 0.004 < 0.004 < 0.004 < 0.004 0.007 0.030 0.069
49260 Acetochlor .008 71 79 < 0.008 < 0.008 0.005 0.013 0.070 0.327 0.378
82630 Metribuzin .010 71 14 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.026 0.042
82660 Diethylanaline .003 71 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .004 71 25 < 0.004 < 0.004 < 0.004 < 0.004 0.002 0.010 0.019
82663 Ethalfluralin .004 71 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 71 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 71 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .002 71 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 71 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .002 71 59 < 0.002 < 0.002 < 0.002 0.003 0.010 0.091 0.783
82669 Pebulate .004 71 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 71 3 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010
82671 Molinate .004 71 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 71 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 71 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .008 71 3 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 0.054
82675 Terbufos .013 71 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 71 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 71 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .004 71 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82679 Propanil .004 71 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 71 7 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.005 0.068
82681 Thiobencarb .002 71 1 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.009
82682 Dachthal (DCPA) .002 71 4 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003
82683 Pendimethalin .020 71 7 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 0.012 0.021
82684 Napropamide .003 71 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 69 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .001 71 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82687 Permethrin .005 71 1 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.110
91063 Diazinon-d10 (%) .100 71 100 82.50 86.60 94.10 101.0 105.7 119.6 125.1
91064 Terbuthylazin (%) .100 52 100 80.60 92.79 105.7 110.5 115.8 125.0 133.6
91065 HCH alpha-D6 (%) .100 71 100 70.80 77.80 88.28 95.40 101.0 112.2 130.0
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 51 100 0.60 0.70 0.90 1.30 2.10 4.90 10.40
29818 Arsenic (ppm) 0.10 51 100 6.00 6.30 7.30 8.20 9.70 12.60 13.60
29820 Barium (ppm) 1.00 51 100 180.0 220.0 580.0 700.0 750.0 810.0 830.0
29822 Beryllium (ppm) 0.10 51 100 0.70 0.80 0.90 0.90 1.20 1.60 1.70
29826 Cadmium (ppm) 0.10 51 100 0.10 0.10 0.30 0.40 0.50 0.70 0.90
29829 Chromium (ppm) 1.00 51 98 < 1.00 33.00 45.00 53.00 59.00 84.00 140.0
29832 Copper (ppm) 1.00 51 100 6.00 6.00 9.00 11.00 17.00 24.00 25.00
29836 Lead (ppm) 1.00 51 100 11.00 12.00 14.00 16.00 18.00 24.00 28.00
29839 Manganese (ppm) 10.0 51 100 360.0 460.0 580.0 700.0 900.0 1000 1100
29841 Mercury (ppm) 0.01 51 88 < 0.01 < 0.01 0.02 0.03 0.04 0.09 0.10
29843 Molybdenum (ppm) 5.00 51 14 < 5.00 < 5.00 < 5.00 < 5.00 < 25.00 25.00 25.00
29845 Nickel (ppm) 1.00 51 98 < 1.00 24.00 31.00 35.00 39.00 55.00 87.00
29847 Selenium (ppm) 0.10 51 100 0.30 0.40 0.60 0.70 0.90 1.10 1.40
29850 Silver (ppm) 0.50 51 4 < 0.50 < 0.50 < 0.50 < 0.50 < 2.50 < 2.50 2.50
29853 Vanadium (ppm) 1.00 51 100 32.00 37.00 43.00 51.00 76.00 100.0 110.0
29855 Zinc (ppm) 1.00 51 100 30.00 40.00 50.00 50.00 80.00 100.0 130.0
30221 Aluminum (%) 0.10 51 100 3.60 3.70 4.00 4.20 4.90 6.00 6.10
30244 Total carbon (%) 0.10 51 100 0.90 1.00 1.10 1.60 1.80 2.10 2.40
30269 Iron (%) 0.10 51 100 1.20 1.30 1.40 1.70 2.20 2.90 3.30
30292 Phosphorus (%) 0.01 51 100 0.04 0.04 0.05 0.06 0.08 0.10 0.11
30308 Sulfur (%) 0.10 46 91 < 0.10 < 0.10 0.30 0.50 0.80 1.20 2.00
30317 Titanium (%) 0.01 51 100 0.10 0.10 0.15 0.20 0.21 0.30 0.31
35031 Cobalt (ppm) 1.00 51 100 6.00 7.00 7.00 8.00 9.00 13.00 14.00
35040 Strontium (ppm) 0.01 51 100 160.0 170.0 210.0 250.0 270.0 310.0 340.0
35046 Uranium (ppm) 50.0 51 0 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0 < 250.0
35050 Lithium (ppm) 1.00 51 100 11.00 16.00 19.00 22.00 25.00 30.00 41.00
49955 Thallium (ppm) 50.0 51 0 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0 < 250.0
50279 Sediment (mg/L) 1.00 51 100 143.0 187.0 277.0 307.0 495.0 1992 2545
50465 Organic carbon (%) 0.10 51 100 0.40 0.60 0.80 1.00 1.40 1.60 1.80
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