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 81,500 109,000 149,000 198,000 267,000 400,000 571,000 Cubic meters per second 1,827 2,308 3,087 4,219 5,607 7,561 11,327 16,169
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) 46 3.4 4.5 8.9 13.3 15.6 20.4 21.4 00076 Turbidity (NTU) 46 0.5 1.4 2.1 3.3 7.0 16.0 57.0 00095 Conductance (uS/cm) 46 94.6 103.0 120.0 141.5 160.0 189.0 191.0 00300 Dissolved oxygen 46 8.7 9.4 10.5 11.3 12.8 13.6 13.8 00400 pH (standard units) 46 7.6 7.7 7.8 7.9 8.0 8.2 8.2 00452 CO3 (filtered) 46 0.0 0.0 0.0 0.0 0.0 0.0 0.0 00453 HCO3 (filtered) 46 50.0 52.0 60.0 67.5 77.0 90.0 99.0 39086 Alk (filtered, as CaCO3) 46 41.0 43.0 49.0 55.5 64.0 74.0 81.0 70331 % finer than 62 microns 46 56.0 68.2 88.0 91.8 95.0 97.6 98.0 80154 Suspended sediment 46 4.0 4.0 6.0 11.0 22.0 72.0 90.0
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 .002 46 59 < 0.002 < 0.002 < 0.002 0.003 0.007 0.019 0.040
00613 NO2-N .001 46 91 < 0.001 < 0.001 0.002 0.002 0.005 0.011 0.016
00623 Org+NH3-N (filtered) .200 46 46 < 0.200 < 0.200 < 0.200 < 0.200 0.200 0.200 0.272
00625 Org+NH3-N (whole-water) .200 46 67 < 0.200 < 0.200 < 0.200 0.200 0.213 0.249 0.500
00631 NO2+NO3-N .050 46 100 0.037 0.050 0.098 0.184 0.286 0.648 0.890
00665 Total P (whole-water) .010 46 93 < 0.010 < 0.010 0.021 0.030 0.038 0.079 0.220
00666 Total P (filtered) .050 46 67 < 0.050 < 0.050 < 0.050 0.010 0.016 0.040 0.050
00671 PO4-P .001 46 98 < 0.001 0.002 0.006 0.009 0.015 0.030 0.049
00681 DOC .300 46 100 1.308 1.391 1.447 1.900 2.100 2.600 3.200
00689 SOC .200 46 93 < 0.100 < 0.200 0.200 0.300 0.600 1.400 2.300
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 46 100 11.89 12.07 14.56 16.28 18.14 20.30 21.25
00925 Magnesium .010 46 100 2.947 3.023 3.811 4.433 5.100 6.273 6.536
00930 Sodium .200 46 100 3.103 3.214 4.104 4.870 6.300 7.875 10.00
00935 Potassium .010 46 100 0.800 0.820 1.000 1.100 1.300 1.550 1.900
00940 Chloride .010 46 100 1.218 1.384 1.918 2.345 3.284 4.706 5.400
00945 Sulfate .010 46 100 5.321 5.591 7.419 8.987 11.28 13.87 15.00
00950 Fluoride .100 46 80 < 0.100 < 0.100 0.103 0.120 0.156 0.200 0.219
00955 Silica .010 46 100 6.859 7.299 8.740 9.942 12.77 14.00 16.00
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 46 59 < 2.0 < 2.0 < 2.0 1.0 1.3 2.0 2.0
01005 Barium 1.0 33 100 17.0 18.2 21.3 23.5 24.7 26.5 28.3
01010 Beryllium 1.0 33 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 46 17 < 16.0 < 16.0 < 16.0 < 16.0 < 16.0 17.6 23.4
01025 Cadmium 1.0 33 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 33 33 < 1.0 < 1.0 < 1.0 < 1.0 1.1 1.5 1.7
01035 Cobalt 1.0 33 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01040 Copper 1.0 33 73 < 1.0 < 1.0 < 1.0 1.1 1.5 2.8 3.3
01046 Iron 10.0 46 41 < 10.0 < 10.0 < 10.0 < 10.0 10.0 12.4 17.4
01049 Lead 1.0 33 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 33 24 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 2.0 2.3
01060 Molybdenum 1.0 33 6 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.1 1.1
01065 Nickel 1.0 33 3 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.7
01075 Silver 1.0 33 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 46 100 62.7 63.6 75.4 87.7 97.3 110.4 116.3
01085 Vanadium 250 46 2 < 250.0 < 250.0 < 250.0 < 250.0 < 250.0 < 250.0 250.0
01090 Zinc 1.0 33 58 < 1.0 < 1.0 < 1.0 1.3 1.8 3.7 4.8
01095 Antimony 1.0 33 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 1.0 33 100 1.0 1.4 1.8 2.7 4.1 9.6 10.8
01130 Lithium 6.0 46 50 < 6.0 < 6.0 < 6.0 < 6.0 4.5 6.2 7.1
01145 Selenium 2.4 46 0 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4
22703 Uranium 1.0 33 9 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.0 1.1
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 45 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 45 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003
04035 Simazine .005 45 22 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.005 0.005
04037 Prometon .018 45 0 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018
04040 Desethyl atrazine .002 45 49 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.004 0.004
04041 Cyanazine .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
04095 Fonofos .003 45 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 45 7 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.006
38933 Chlorpyrifos .004 45 9 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.005 0.006
39341 gamma-HCH .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 45 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .004 45 33 < 0.004 < 0.004 < 0.004 < 0.004 0.003 0.005 0.006
39532 Malathion .005 45 9 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.005 0.005
39542 Parathion .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
39632 Atrazine .005 45 58 < 0.005 < 0.005 < 0.005 0.002 0.004 0.005 0.007
46342 Alachlor .002 45 9 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003 0.003
49260 Acetochlor .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82630 Metribuzin .004 45 7 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004 0.005
82660 Diethylanaline .003 45 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82663 Ethalfluralin .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 45 11 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 0.007 0.009
82666 Linuron .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 45 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .002 45 42 < 0.002 < 0.002 < 0.002 < 0.002 0.004 0.011 0.012
82669 Pebulate .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 45 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82671 Molinate .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 45 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .003 45 2 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.003
82675 Terbufos .013 45 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 45 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 45 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 45 13 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.005 0.014
82679 Propanil .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 45 7 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.003 0.003
82681 Thiobencarb .002 45 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 45 27 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.002 0.003
82683 Pendimethalin .004 45 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .003 45 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 44 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .010 45 2 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010
82687 Permethrin .005 45 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 45 100 67.20 83.10 93.00 99.07 107.4 117.0 125.9
91064 Terbuthylazin (%) .100 30 100 88.20 95.66 103.0 108.1 119.6 127.4 149.9
91065 HCH alpha-D6 (%) .100 45 100 75.20 83.40 92.40 96.23 103.9 119.2 151.3
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 33 100 0.90 1.10 1.20 1.50 1.80 2.40 2.60
29818 Arsenic (ppm) 0.10 33 100 6.80 7.30 8.10 8.90 10.00 10.90 11.40
29820 Barium (ppm) 1.00 33 100 470.0 540.0 560.0 590.0 650.0 700.0 730.0
29822 Beryllium (ppm) 0.10 33 100 1.10 1.30 1.50 1.50 1.70 1.90 2.00
29826 Cadmium (ppm) 0.10 33 100 0.30 0.60 1.00 1.20 1.60 2.10 2.20
29829 Chromium (ppm) 1.00 33 100 47.00 51.00 58.00 62.00 66.00 120.0 160.0
29832 Copper (ppm) 1.00 33 100 39.00 40.00 45.00 50.00 57.00 110.0 120.0
29836 Lead (ppm) 1.00 33 100 18.00 18.00 26.00 30.00 33.00 50.00 57.00
29839 Manganese (ppm) 10.0 33 100 980.0 990.0 1100 1200 1400 1600 1600
29841 Mercury (ppm) 0.01 25 92 < 0.01 < 0.01 0.05 0.07 0.13 0.34 0.70
29843 Molybdenum (ppm) 5.00 33 6 < 5.00 < 5.00 < 5.00 < 10.00 < 10.00 50.00 50.00
29845 Nickel (ppm) 1.00 33 100 31.00 31.00 35.00 40.00 43.00 81.00 99.00
29847 Selenium (ppm) 0.10 33 100 0.30 0.30 0.40 0.60 0.60 0.80 0.80
29850 Silver (ppm) 0.50 33 3 < 0.50 < 0.50 < 0.50 < 1.00 < 1.00 < 5.00 5.00
29853 Vanadium (ppm) 1.00 33 100 100.0 100.0 110.0 120.0 120.0 130.0 150.0
29855 Zinc (ppm) 1.00 33 100 150.0 180.0 210.0 220.0 240.0 290.0 510.0
30221 Aluminum (%) 0.10 31 100 5.70 5.80 6.40 6.90 7.60 8.00 8.40
30244 Total carbon (%) 0.10 28 100 1.40 1.70 2.85 3.65 4.20 6.10 6.40
30269 Iron (%) 0.10 33 100 3.80 3.80 4.20 4.50 4.70 5.80 6.80
30292 Phosphorus (%) 0.01 33 100 0.10 0.11 0.12 0.14 0.15 0.18 0.19
30308 Sulfur (%) 0.10 22 91 < 0.10 < 0.10 0.10 0.20 0.20 0.60 1.90
30317 Titanium (%) 0.01 31 100 0.44 0.45 0.47 0.50 0.51 0.60 0.60
35031 Cobalt (ppm) 1.00 33 100 14.00 15.00 18.00 19.00 20.00 23.00 23.00
35040 Strontium (ppm) 0.01 33 100 220.0 220.0 260.0 280.0 310.0 380.0 390.0
35046 Uranium (ppm) 50.0 33 3 < 50.00 < 50.00 < 50.00 < 100.0 < 100.0 < 500.0 500.0
35050 Lithium (ppm) 1.00 33 100 24.00 24.00 27.00 28.00 32.00 44.00 49.00
49955 Thallium (ppm) 50.0 33 0 < 50.00 < 50.00 < 50.00 < 100.0 < 100.0 < 500.0 < 500.0
50279 Sediment (mg/L) 1.00 33 100 4.00 5.00 7.00 15.00 29.00 59.00 92.00
50465 Organic carbon (%) 0.10 20 95 < 0.10 0.30 1.75 2.75 3.55 4.00 4.00
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