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 18 205 678 1,340 2,310 5,830 11,600 Cubic meters per second 1,827 1 6 19 38 65 165 328
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) 29 15.0 15.5 22.5 27.5 28.7 32.0 33.0 00076 Turbidity (NTU) 29 0.7 1.0 4.0 4.8 7.2 21.0 35.0 00095 Conductance (uS/cm) 29 762.0 788.0 943.0 1090.0 1190.0 1290.0 1370.0 00300 Dissolved oxygen 28 1.5 4.9 6.0 7.5 8.9 11.1 11.6 00400 pH (standard units) 28 7.6 7.7 7.9 8.0 8.1 8.4 8.5 00452 CO3 (filtered) 29 0.0 0.0 0.0 0.0 0.0 0.0 3.0 00453 HCO3 (filtered) 29 98.0 103.0 116.0 126.0 136.0 147.0 148.0 39086 Alk (filtered, as CaCO3) 29 80.0 85.0 95.0 103.0 111.0 121.0 122.0 70331 % finer than 62 microns 25 20.0 54.0 85.8 94.0 97.0 100.0 100.0 80154 Suspended sediment 28 6.0 7.0 11.0 16.5 21.5 44.0 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 .015 28 96 < 0.015 0.023 0.045 0.081 0.125 0.180 0.319
00613 NO2-N .010 28 68 < 0.010 < 0.010 < 0.010 0.011 0.020 0.076 0.084
00623 Org+NH3-N (filtered) .200 28 100 0.238 0.274 0.303 0.354 0.438 0.500 0.698
00625 Org+NH3-N (whole-water) .200 29 100 0.463 0.488 0.586 0.661 0.700 0.855 0.905
00631 NO2+NO3-N .050 28 75 < 0.050 < 0.050 < 0.050 0.082 0.170 0.393 0.776
00665 Total P (whole-water) .050 29 97 < 0.050 0.025 0.040 0.051 0.070 0.104 0.211
00666 Total P (filtered) .050 28 57 < 0.050 < 0.050 < 0.050 0.010 0.025 0.077 0.087
00671 PO4-P .010 28 89 < 0.010 < 0.010 0.003 0.007 0.011 0.064 0.070
00681 DOC .300 29 100 2.700 2.900 3.400 3.600 3.793 4.100 5.900
00689 SOC .200 29 97 < 0.200 0.200 0.600 0.771 1.100 1.700 2.700
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 29 100 54.54 55.00 60.85 63.35 68.47 70.47 70.56
00925 Magnesium .010 29 100 14.67 14.96 18.00 19.91 22.00 25.34 26.83
00930 Sodium .200 29 100 66.63 70.62 95.47 114.8 130.0 145.8 154.1
00935 Potassium .010 29 100 4.740 4.760 5.110 5.600 5.880 6.400 6.800
00940 Chloride .010 29 100 86.90 87.47 119.2 140.0 150.0 180.0 183.8
00945 Sulfate .010 29 100 127.7 134.7 170.2 204.6 232.3 250.0 260.0
00950 Fluoride .100 29 100 0.445 0.453 0.547 0.674 0.779 0.900 0.900
00955 Silica .010 29 100 7.899 8.548 9.321 10.00 10.95 11.94 12.18
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 29 100 1.9 2.0 2.0 3.0 3.2 4.0 4.0
01005 Barium 1.0 24 100 100.0 103.5 109.4 114.3 127.4 132.0 145.0
01010 Beryllium 1.0 24 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 28 100 135.8 142.4 165.3 193.4 204.7 232.0 240.0
01025 Cadmium 1.0 24 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 5.0 24 42 < 5.0 < 5.0 < 5.0 < 5.0 1.5 2.4 5.0
01035 Cobalt 3.0 24 0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0
01040 Copper 1.0 24 88 < 1.0 < 1.0 1.0 1.2 1.8 2.2 3.0
01046 Iron 10.0 29 10 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0 10.0
01049 Lead 1.0 24 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 24 100 1.6 1.8 2.4 4.2 7.8 14.0 43.0
01060 Molybdenum 10.0 24 96 < 10.0 5.0 6.0 6.6 8.0 8.6 10.0
01065 Nickel 1.0 24 92 < 1.0 < 1.0 1.2 1.6 1.9 2.0 2.0
01075 Silver 1.0 24 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 29 100 866.1 915.6 1042 1200 1300 1446 1450
01085 Vanadium 10.0 29 48 < 10.0 < 10.0 < 10.0 < 10.0 10.0 11.1 13.4
01090 Zinc 1.0 23 100 1.2 1.3 1.8 2.8 4.1 9.9 13.0
01095 Antimony 1.0 23 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 10.0 24 50 < 10.0 < 10.0 < 10.0 < 10.0 1.6 2.0 10.0
01130 Lithium 4.0 29 100 22.4 25.1 32.8 42.0 51.0 55.8 58.9
01145 Selenium 2.4 29 10 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4 2.4
22703 Uranium 1.0 23 100 1.7 1.8 2.6 3.0 3.5 4.0 4.0
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 28 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 28 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .005 28 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
04037 Prometon .018 28 4 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 0.018
04040 Desethyl atrazine .002 28 32 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.003 0.004
04041 Cyanazine .004 28 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
04095 Fonofos .003 28 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 28 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 28 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
38933 Chlorpyrifos .004 28 14 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.029 0.061
39341 gamma-HCH .004 28 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 28 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 28 11 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003 0.005
39532 Malathion .005 28 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
39542 Parathion .004 28 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .006 27 30 < 0.006 < 0.006 < 0.006 < 0.006 0.004 0.053 0.066
39632 Atrazine .001 28 79 < 0.001 < 0.001 0.004 0.006 0.008 0.010 0.011
46342 Alachlor .002 28 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
49260 Acetochlor .002 28 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82630 Metribuzin .004 27 11 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.014 0.026
82660 Diethylanaline .003 28 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 28 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82663 Ethalfluralin .004 28 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 28 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 28 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .002 26 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 26 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .002 26 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82669 Pebulate .004 26 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 26 12 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.010
82671 Molinate .004 28 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 28 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 28 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .006 28 4 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
82675 Terbufos .013 28 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 28 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 28 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 28 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82679 Propanil .004 28 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 28 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82681 Thiobencarb .002 28 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 28 21 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003 0.004
82683 Pendimethalin .004 28 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .003 28 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 26 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .030 28 0 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030
82687 Permethrin .005 28 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 28 100 74.50 76.80 98.41 105.8 111.2 114.6 137.0
91064 Terbuthylazin (%) .100 18 100 99.30 99.30 102.0 106.1 110.5 129.1 129.1
91065 HCH alpha-D6 (%) .100 28 100 74.90 76.40 85.58 94.79 100.0 104.6 106.2
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 24 100 0.90 0.90 1.35 2.90 6.35 13.50 20.00
29818 Arsenic (ppm) 0.10 24 100 4.30 5.30 6.50 8.65 9.65 11.10 15.30
29820 Barium (ppm) 1.00 24 100 100.0 180.0 255.0 300.0 340.0 410.0 420.0
29822 Beryllium (ppm) 0.10 24 100 0.50 0.50 0.75 0.90 1.10 1.70 2.00
29826 Cadmium (ppm) 0.10 24 96 < 0.10 0.10 0.20 0.35 0.55 1.00 1.20
29829 Chromium (ppm) 1.00 24 100 23.00 23.00 30.00 37.00 52.00 71.00 130.0
29832 Copper (ppm) 1.00 24 100 6.00 7.00 10.00 11.00 14.50 24.00 30.00
29836 Lead (ppm) 1.00 24 100 4.00 11.00 17.50 20.50 25.00 42.00 140.0
29839 Manganese (ppm) 10.0 24 100 290.0 540.0 740.0 955.0 1200 1700 2600
29841 Mercury (ppm) 0.01 21 90 < 0.01 < 0.01 0.06 0.12 0.20 0.28 0.34
29843 Molybdenum (ppm) 5.00 23 30 < 5.00 < 5.00 < 7.00 < 10.00 11.00 50.00 50.00
29845 Nickel (ppm) 1.00 24 100 14.00 15.00 19.50 23.50 36.00 53.00 74.00
29847 Selenium (ppm) 0.10 24 100 0.70 0.80 1.00 1.30 1.55 2.10 2.20
29850 Silver (ppm) 0.50 24 8 < 0.50 < 0.50 < 1.00 < 1.00 < 1.15 5.00 5.00
29853 Vanadium (ppm) 1.00 24 100 16.00 27.00 44.50 53.50 66.00 86.00 100.0
29855 Zinc (ppm) 1.00 24 100 50.00 60.00 75.00 90.00 125.0 210.0 240.0
30221 Aluminum (%) 0.10 24 100 1.30 2.30 3.15 3.80 4.60 6.20 6.30
30244 Total carbon (%) 0.10 17 76 < 0.10 < 0.10 4.40 5.20 5.70 11.20 11.20
30269 Iron (%) 0.10 24 100 0.50 0.90 1.35 1.65 2.05 2.80 3.00
30292 Phosphorus (%) 0.01 24 100 0.03 0.03 0.10 0.11 0.14 0.20 0.25
30308 Sulfur (%) 0.10 15 73 < 0.10 < 0.10 < 0.10 2.40 4.10 5.30 5.30
30317 Titanium (%) 0.01 24 100 0.10 0.10 0.10 0.16 0.20 0.30 0.33
35031 Cobalt (ppm) 1.00 24 100 2.00 4.00 6.00 8.00 10.00 14.00 15.00
35040 Strontium (ppm) 0.01 24 100 370.0 420.0 585.0 840.0 1000 1200 1800
35046 Uranium (ppm) 50.0 23 0 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 500.0 500.0
35050 Lithium (ppm) 1.00 24 100 24.00 31.00 38.50 44.50 48.00 55.00 58.00
49955 Thallium (ppm) 50.0 23 0 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 500.0 500.0
50279 Sediment (mg/L) 1.00 24 100 9.00 10.00 13.00 19.50 26.50 52.00 86.00
50465 Organic carbon (%) 0.10 15 60 < 0.10 < 0.10 < 0.10 3.70 4.20 5.80 5.80
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