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 2,880 3,930 7,750 16,900 41,500 97,200 203,000 Cubic meters per second 1,827 82 111 219 479 1,175 2,752 5,748
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) 52 2.3 4.1 8.0 16.2 25.0 28.0 30.5 00076 Turbidity (NTU) 52 0.8 3.0 18.5 38.0 60.0 122.0 150.0 00095 Conductance (uS/cm) 52 248.0 316.0 417.0 502.0 590.5 697.0 783.0 00300 Dissolved oxygen 52 5.5 5.6 7.8 9.7 11.3 13.1 13.2 00400 pH (standard units) 53 7.3 7.3 7.6 7.8 8.0 8.4 8.5 00453 HCO3 (filtered) 49 47.0 108.0 140.0 168.0 203.0 231.0 285.0 39086 Alk (filtered, as CaCO3) 50 39.0 88.0 114.0 137.5 169.0 190.0 234.0 70331 % finer than 62 microns 51 70.4 84.8 90.1 95.6 98.0 99.3 99.7 80154 Suspended sediment 51 17.0 23.0 73.0 129.0 190.0 263.0 336.0
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 52 46 < 0.020 < 0.020 < 0.020 < 0.020 0.040 0.088 0.132
00613 NO2-N .010 52 81 < 0.010 < 0.010 0.011 0.018 0.030 0.089 0.114
00623 Org+NH3-N (filtered) .200 52 94 < 0.200 < 0.200 0.300 0.348 0.448 0.543 1.061
00625 Org+NH3-N (whole-water) .200 52 100 0.300 0.581 0.843 0.984 1.178 1.473 1.808
00631 NO2+NO3-N .050 52 96 < 0.050 0.237 1.683 3.105 3.988 5.876 6.492
00665 Total P (whole-water) .010 52 100 0.024 0.087 0.150 0.225 0.295 0.414 0.538
00666 Total P (filtered) .010 52 92 < 0.010 < 0.010 0.032 0.061 0.079 0.121 0.130
00671 PO4-P .001 52 92 < 0.001 < 0.001 0.028 0.062 0.085 0.105 0.119
00681 DOC .300 53 100 3.200 3.200 3.600 4.200 4.600 5.800 6.400
00689 SOC .200 50 96 0.800 1.100 1.700 2.850 3.500 4.900 > 5.000
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 52 100 28.36 39.07 46.54 57.70 63.07 73.96 78.10
00925 Magnesium .010 52 100 7.748 10.63 14.30 18.37 22.42 25.97 27.42
00930 Sodium .200 52 100 5.455 6.519 10.54 13.00 22.74 38.83 44.23
00935 Potassium .010 52 100 2.270 2.370 2.890 3.385 3.710 4.610 4.800
00940 Chloride .010 52 100 11.41 12.84 18.67 22.87 34.05 52.23 56.67
00945 Sulfate .010 52 100 20.28 24.00 36.71 49.00 65.62 80.03 105.8
00950 Fluoride .100 52 100 0.115 0.143 0.171 0.200 0.233 0.288 0.300
00955 Silica .010 52 100 0.060 0.240 3.313 5.500 6.512 7.300 7.891
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 52 56 < 2.0 < 2.0 < 2.0 1.0 1.4 2.0 2.6
01005 Barium 1.0 40 100 27.4 31.0 39.8 45.3 51.1 54.7 56.8
01010 Beryllium 1.0 40 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 52 100 26.1 31.2 43.3 63.4 104.8 178.0 223.7
01025 Cadmium 1.0 40 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 40 78 < 1.0 < 1.0 1.0 1.6 2.3 3.9 4.6
01035 Cobalt 1.0 40 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01040 Copper 1.0 40 98 < 1.0 1.0 1.4 1.7 2.0 2.4 2.8
01046 Iron 10.0 52 38 < 10.0 < 10.0 < 10.0 < 10.0 10.0 20.8 28.0
01049 Lead 1.0 40 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 40 68 < 1.0 < 1.0 < 1.0 1.8 2.6 8.1 10.0
01060 Molybdenum 1.0 40 100 1.0 1.6 2.0 2.9 5.3 7.8 10.8
01065 Nickel 1.0 40 95 < 1.0 < 1.0 1.6 1.7 2.2 3.1 4.4
01075 Silver 1.0 40 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 52 100 71.6 95.1 140.2 174.7 216.3 297.5 330.0
01085 Vanadium 10.0 52 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01090 Zinc 1.0 40 83 < 1.0 < 1.0 1.0 2.0 2.6 6.3 8.4
01095 Antimony 1.0 40 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 1.0 40 100 1.4 2.0 4.0 4.8 5.5 10.3 14.0
01130 Lithium 6.0 52 54 < 6.0 < 6.0 < 6.0 4.0 5.6 8.2 10.1
01145 Selenium 2.4 52 15 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4 2.4
22703 Uranium 1.0 40 38 < 1.0 < 1.0 < 1.0 < 1.0 1.1 1.3 1.4
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 2 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 0.031
04028 Butylate .002 51 4 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.021
04035 Simazine .005 51 100 0.014 0.021 0.036 0.095 0.287 0.897 1.320
04037 Prometon .018 51 94 < 0.018 < 0.018 0.011 0.019 0.028 0.040 0.052
04040 Desethyl atrazine .002 51 100 0.021 0.038 0.067 0.105 0.223 0.693 0.875
04041 Cyanazine .004 51 100 0.011 0.015 0.041 0.077 0.190 1.760 3.330
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 2 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .004 50 32 < 0.004 < 0.004 < 0.004 < 0.004 0.004 0.015 0.061
39341 gamma-HCH .004 51 2 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004
39381 Dieldrin .015 51 2 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015 0.015
39415 Metolachlor .002 51 100 0.050 0.056 0.144 0.236 0.948 4.040 10.30
39532 Malathion .005 51 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
39542 Parathion .018 51 0 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018
39572 Diazinon .002 51 33 < 0.002 < 0.002 < 0.002 < 0.002 0.004 0.007 0.012
39632 Atrazine .001 51 100 0.091 0.135 0.273 0.646 2.870 10.40 19.80
46342 Alachlor .010 51 80 < 0.010 < 0.010 0.007 0.012 0.028 0.248 0.694
49260 Acetochlor .002 51 94 < 0.002 < 0.002 0.014 0.034 0.261 1.600 2.910
82630 Metribuzin .010 51 67 < 0.010 < 0.010 < 0.010 0.018 0.067 0.116 0.175
82660 Diethylanaline .003 51 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 51 18 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.005 0.007
82663 Ethalfluralin .004 51 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 51 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 51 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .015 51 0 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015
82667 Methyl parathion .006 51 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .002 51 10 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003 0.007
82669 Pebulate .004 51 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 51 67 < 0.010 < 0.010 < 0.010 0.010 0.011 0.017 0.020
82671 Molinate .004 51 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 51 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 51 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .030 51 8 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030 0.030 0.157
82675 Terbufos .013 51 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 51 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
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 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 51 8 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.004 0.007
82681 Thiobencarb .002 51 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 51 6 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.003
82683 Pendimethalin .035 51 8 < 0.035 < 0.035 < 0.035 < 0.035 < 0.035 0.022 0.035
82684 Napropamide .003 51 2 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.006
82685 Propargite .090 51 0 < 0.090 < 0.090 < 0.090 < 0.090 < 0.090 < 0.090 < 0.090
82686 Azinphos methyl .001 51 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
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 74.70 82.63 97.63 105.1 112.8 134.2 142.7
91064 Terbuthylazin (%) .100 36 100 0.086 84.90 109.1 117.5 130.3 145.5 153.2
91065 HCH alpha-D6 (%) .100 51 100 62.40 75.64 91.01 97.32 103.9 111.0 120.0
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 37 97 < 0.10 0.60 0.80 0.90 1.20 4.80 7.70
29818 Arsenic (ppm) 0.10 37 100 8.50 8.50 9.80 11.10 12.00 15.80 16.70
29820 Barium (ppm) 1.00 37 100 370.0 380.0 450.0 470.0 500.0 570.0 630.0
29822 Beryllium (ppm) 0.10 37 100 1.10 1.10 1.40 1.50 1.70 2.10 2.10
29826 Cadmium (ppm) 0.10 37 100 0.10 0.30 0.40 0.50 0.60 0.90 5.90
29829 Chromium (ppm) 1.00 37 100 46.00 47.00 57.00 62.00 69.00 86.00 88.00
29832 Copper (ppm) 1.00 37 100 19.00 19.00 23.00 25.00 26.00 35.00 88.00
29836 Lead (ppm) 1.00 37 100 19.00 21.00 24.00 25.00 28.00 40.00 84.00
29839 Manganese (ppm) 10.0 37 100 860.0 930.0 1100 1300 1700 2900 3500
29841 Mercury (ppm) 0.01 37 100 0.02 0.02 0.04 0.06 0.09 0.47 1.10
29843 Molybdenum (ppm) 5.00 37 5 < 5.00 < 5.00 < 5.00 < 5.00 < 5.00 25.00 25.00
29845 Nickel (ppm) 1.00 37 100 26.00 28.00 34.00 38.00 42.00 48.00 53.00
29847 Selenium (ppm) 0.10 37 100 0.40 0.60 0.70 0.80 1.10 1.90 2.10
29850 Silver (ppm) 0.50 37 5 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 2.50 2.50
29853 Vanadium (ppm) 1.00 37 100 59.00 61.00 79.00 91.00 100.0 130.0 140.0
29855 Zinc (ppm) 1.00 37 100 90.00 110.0 130.0 130.0 140.0 200.0 220.0
30221 Aluminum (%) 0.10 37 100 3.80 4.20 5.50 6.10 6.80 8.30 8.40
30244 Total carbon (%) 0.10 37 100 2.30 2.40 2.70 3.20 4.40 6.40 8.70
30269 Iron (%) 0.10 37 100 2.30 2.40 2.90 3.20 3.50 4.30 4.50
30292 Phosphorus (%) 0.01 37 100 0.09 0.10 0.11 0.12 0.13 0.17 0.19
30308 Sulfur (%) 0.10 32 100 0.10 0.10 0.10 0.20 0.30 1.40 2.00
30317 Titanium (%) 0.01 37 100 0.24 0.25 0.34 0.39 0.40 0.44 0.45
35031 Cobalt (ppm) 1.00 37 100 10.00 11.00 12.00 13.00 14.00 16.00 17.00
35040 Strontium (ppm) 0.01 37 100 100.0 100.0 120.0 130.0 160.0 300.0 320.0
35046 Uranium (ppm) 50.0 37 0 < 50.00 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0
35050 Lithium (ppm) 1.00 37 100 30.00 32.00 36.00 39.00 43.00 55.00 65.00
49955 Thallium (ppm) 50.0 37 0 < 50.00 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0
50279 Sediment (mg/L) 1.00 37 100 25.00 42.00 95.00 130.0 222.0 264.0 326.0
50465 Organic carbon (%) 0.10 36 100 0.10 1.80 2.15 2.35 2.80 4.20 6.50
Return to Results