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 14 105 154 177 206 420 3,450 Cubic meters per second 1,827 0 3 4 5 6 12 98
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) 51 18.0 19.5 22.5 26.0 28.5 29.5 32.0 00076 Turbidity (NTU) 51 48.0 60.0 76.0 95.0 114.0 216.0 330.0 00095 Conductance (uS/cm) 51 1170.0 1774.0 3820.0 4090.0 4460.0 5030.0 5570.0 00300 Dissolved oxygen 51 4.7 5.8 6.7 7.5 8.5 9.5 10.6 00400 pH (standard units) 51 7.5 7.6 7.7 7.9 8.0 8.2 8.4 00452 CO3 (filtered) 51 0.0 0.0 0.0 0.0 0.0 0.0 9.0 00453 HCO3 (filtered) 51 97.0 134.0 240.0 261.0 276.0 300.0 322.0 39086 Alk (filtered, as CaCO3) 51 80.0 110.0 199.0 214.0 226.0 246.0 264.0 70331 % finer than 62 microns 40 91.1 92.8 97.3 99.0 99.4 99.7 100.0 80154 Suspended sediment 51 93.0 145.0 195.0 250.0 454.0 655.0 1096.0
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 51 78 < 0.020 < 0.020 0.020 0.040 0.066 0.152 0.230
00613 NO2-N .010 51 100 0.041 0.054 0.079 0.110 0.178 0.248 0.332
00623 Org+NH3-N (filtered) .200 51 100 0.294 0.373 0.461 0.527 0.600 0.707 0.800
00625 Org+NH3-N (whole-water) .200 51 100 0.700 0.735 1.190 1.275 1.544 2.100 2.400
00631 NO2+NO3-N .050 51 100 1.347 1.619 2.834 3.500 4.080 5.008 6.386
00665 Total P (whole-water) .010 51 100 0.330 0.340 0.526 0.620 0.685 0.940 1.015
00666 Total P (filtered) .010 51 100 0.050 0.120 0.227 0.292 0.372 0.510 0.607
00671 PO4-P .010 51 100 0.070 0.150 0.200 0.276 0.342 0.421 0.574
00681 DOC .300 48 100 3.202 3.900 4.165 4.750 5.200 7.008 8.000
00689 SOC .200 50 96 < 0.600 1.400 2.100 2.950 4.400 5.454 > 7.400
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 51 100 59.00 81.82 181.6 200.0 213.1 240.0 269.5
00925 Magnesium .010 51 100 17.00 29.72 71.77 79.60 86.42 98.66 109.7
00930 Sodium .200 51 100 130.0 218.4 507.9 580.6 623.2 708.2 815.3
00935 Potassium .010 51 100 6.500 8.280 10.00 10.60 11.00 12.00 12.20
00940 Chloride .010 51 100 179.8 316.3 730.4 812.6 880.0 1038 1157
00945 Sulfate .010 51 100 170.0 280.6 659.9 738.1 801.4 898.4 1018
00950 Fluoride .100 51 100 0.174 0.449 0.786 0.842 0.966 1.000 1.000
00955 Silica .010 51 100 10.00 13.66 21.75 23.01 24.16 27.00 28.01
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 51 100 4.0 5.0 6.1 7.2 8.0 10.2 12.0
01005 Barium 1.0 38 100 39.3 49.0 71.4 78.1 89.6 122.5 143.0
01010 Beryllium 5.0 38 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0
01020 Boron 16.0 51 100 328.0 480.0 1270 1400 1507 1683 1903
01025 Cadmium 5.0 38 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0
01030 Chromium 5.0 38 63 < 5.0 < 5.0 < 5.0 2.3 3.0 4.9 5.0
01035 Cobalt 5.0 38 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0
01040 Copper 5.0 38 87 < 5.0 < 5.0 3.0 3.7 5.0 8.0 8.0
01046 Iron 50.0 51 2 < 50.0 < 50.0 < 50.0 < 50.0 < 50.0 < 50.0 50.0
01049 Lead 5.0 38 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0
01056 Manganese 2.0 38 82 < 2.0 < 2.0 2.0 3.8 8.2 13.1 14.0
01060 Molybdenum 1.0 38 100 7.0 8.4 18.0 19.9 21.1 23.0 23.5
01065 Nickel 5.0 38 92 < 5.0 < 5.0 2.7 4.0 4.8 8.0 9.0
01075 Silver 5.0 38 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0
01080 Strontium 0.5 51 100 1000 1514 3738 4161 4507 4968 5643
01085 Vanadium 30.0 50 52 < 30.0 < 30.0 < 30.0 24.0 30.0 34.0 35.3
01090 Zinc 3.0 38 97 < 3.0 2.6 4.0 5.4 7.2 12.0 12.8
01095 Antimony 5.0 38 0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0 < 5.0
01106 Aluminum 3.0 36 67 < 3.0 < 3.0 < 3.0 3.0 5.1 22.0 46.8
01130 Lithium 4.0 51 100 30.0 45.5 110.6 120.9 131.1 150.0 160.4
01145 Selenium 1.0 51 90 < 1.0 < 1.0 1.2 1.5 2.0 2.4 2.9
22703 Uranium 1.0 38 100 2.0 2.5 8.7 10.1 11.0 12.5 13.2
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 51 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 51 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .005 51 92 < 0.005 < 0.005 0.014 0.026 0.052 0.149 0.442
04037 Prometon .018 51 39 < 0.018 < 0.018 < 0.018 < 0.018 0.018 0.018 0.033
04040 Desethyl atrazine .002 50 100 0.011 0.019 0.031 0.075 0.140 0.370 1.210
04041 Cyanazine .015 51 2 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015 0.015
04095 Fonofos .003 51 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 51 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 51 22 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.006
38933 Chlorpyrifos .010 50 38 < 0.010 < 0.010 < 0.010 < 0.010 0.015 0.085 0.220
39341 gamma-HCH .007 51 6 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 0.007 0.008
39381 Dieldrin .001 51 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 51 73 < 0.002 < 0.002 < 0.002 0.005 0.011 0.247 0.540
39532 Malathion .015 51 20 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015 0.063 0.840
39542 Parathion .004 51 2 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.092
39572 Diazinon .002 47 89 < 0.002 < 0.002 0.007 0.016 0.035 0.110 0.370
39632 Atrazine .001 50 100 0.019 0.029 0.109 0.330 1.200 5.630 15.10
46342 Alachlor .010 51 12 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.016
49260 Acetochlor .002 51 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82630 Metribuzin .050 51 2 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 0.050
82660 Diethylanaline .003 51 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .009 51 16 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 0.007 0.009
82663 Ethalfluralin .004 51 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 51 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003
82665 Terbacil .007 51 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .013 49 20 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 0.039 0.107
82667 Methyl parathion .006 49 22 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.190 1.700
82668 EPTC .008 49 0 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008
82669 Pebulate .004 49 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 49 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82671 Molinate .004 51 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 51 2 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.100
82673 Benfluralin .002 51 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003
82674 Carbofuran .030 51 33 < 0.030 < 0.030 < 0.030 < 0.030 0.050 0.134 0.152
82675 Terbufos .013 51 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .007 51 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82677 Disulfoton .017 51 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 51 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82679 Propanil .004 51 2 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004
82680 Carbaryl .006 51 25 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.042 0.099
82681 Thiobencarb .002 51 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 51 53 < 0.002 < 0.002 < 0.002 0.002 0.004 0.155 0.588
82683 Pendimethalin .012 51 24 < 0.012 < 0.012 < 0.012 < 0.012 < 0.012 0.079 0.138
82684 Napropamide .003 51 4 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.016
82685 Propargite .013 50 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .001 51 27 < 0.001 < 0.001 < 0.001 < 0.001 0.015 0.470 1.230
82687 Permethrin .005 51 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 51 100 81.90 87.42 93.20 103.4 109.7 127.4 136.9
91064 Terbuthylazin (%) .100 37 100 95.02 103.0 110.0 115.0 122.0 147.0 159.1
91065 HCH alpha-D6 (%) .100 51 100 74.90 79.53 88.99 97.29 103.0 117.0 127.7
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 39 100 0.20 0.50 0.70 1.60 2.50 5.50 11.00
29818 Arsenic (ppm) 0.10 39 100 3.50 3.90 4.20 5.20 6.00 10.80 11.00
29820 Barium (ppm) 1.00 39 100 110.0 110.0 160.0 210.0 270.0 390.0 410.0
29822 Beryllium (ppm) 0.10 39 100 0.40 0.50 0.70 1.00 1.20 1.70 1.80
29826 Cadmium (ppm) 0.10 39 100 0.10 0.10 0.20 0.30 0.40 3.00 5.00
29829 Chromium (ppm) 1.00 39 100 12.00 17.00 21.00 27.00 34.00 49.00 51.00
29832 Copper (ppm) 1.00 39 100 6.00 6.00 9.00 12.00 17.00 30.00 50.00
29836 Lead (ppm) 1.00 39 100 4.00 6.00 8.00 12.00 17.00 48.00 130.0
29839 Manganese (ppm) 10.0 39 100 360.0 410.0 600.0 700.0 830.0 1000 1000
29841 Mercury (ppm) 0.01 39 97 < 0.01 0.01 0.04 0.05 0.08 0.22 1.10
29843 Molybdenum (ppm) 5.00 39 21 < 3.00 < 5.00 < 5.00 < 5.00 < 6.00 25.00 50.00
29845 Nickel (ppm) 1.00 39 100 7.00 8.00 12.00 16.00 20.00 27.00 29.00
29847 Selenium (ppm) 0.10 39 100 0.30 0.40 0.40 0.50 0.50 0.70 0.90
29850 Silver (ppm) 0.50 39 0 < 0.50 < 0.50 < 0.50 < 0.50 < 2.50 < 2.50 < 5.00
29853 Vanadium (ppm) 1.00 39 100 21.00 22.00 35.00 43.00 53.00 78.00 89.00
29855 Zinc (ppm) 1.00 39 100 40.00 40.00 60.00 70.00 90.00 160.0 250.0
30221 Aluminum (%) 0.10 38 100 1.60 1.80 2.80 3.70 4.30 6.30 7.00
30244 Total carbon (%) 0.10 38 100 1.90 2.20 2.70 3.20 3.70 4.20 4.40
30269 Iron (%) 0.10 39 100 0.60 0.80 1.20 1.60 2.00 2.70 3.20
30292 Phosphorus (%) 0.01 39 100 0.04 0.05 0.07 0.08 0.10 0.11 0.12
30308 Sulfur (%) 0.10 34 100 0.20 0.50 1.80 3.05 4.10 5.20 5.30
30317 Titanium (%) 0.01 38 100 0.08 0.10 0.10 0.17 0.20 0.30 0.32
35031 Cobalt (ppm) 1.00 39 100 2.00 2.00 4.00 5.00 7.00 9.00 11.00
35040 Strontium (ppm) 0.01 39 100 280.0 400.0 680.0 870.0 1000 1200 1300
35046 Uranium (ppm) 50.0 39 0 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0 < 500.0
35050 Lithium (ppm) 1.00 39 100 30.00 33.00 38.00 42.00 45.00 50.00 51.00
49955 Thallium (ppm) 50.0 39 0 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0 < 500.0
50279 Sediment (mg/L) 1.00 39 100 215.0 246.0 300.0 383.0 515.0 719.0 736.0
50465 Organic carbon (%) 0.10 38 100 0.80 0.80 1.10 1.30 1.70 2.70 3.30
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