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 34,700 46,200 64,800 91,300 132,000 226,000 353,000 Cubic meters per second 1,827 983 1,308 1,835 2,585 3,738 6,400 9,996
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) 75 1.7 3.1 7.0 15.3 23.8 28.6 29.6 00076 Turbidity (NTU) 75 0.2 1.6 26.0 54.0 130.0 300.0 600.0 00095 Conductance (uS/cm) 75 301.0 380.0 500.0 630.0 721.0 790.0 858.0 00300 Dissolved oxygen 75 3.8 5.5 7.1 9.0 11.6 13.3 14.5 00400 pH (standard units) 75 7.4 7.5 7.8 7.9 8.0 8.2 8.7 00452 CO3 (filtered) 75 0.0 0.0 0.0 0.0 0.0 0.0 14.0 00453 HCO3 (filtered) 75 121.0 141.0 169.0 189.0 203.0 269.0 486.0 39086 Alk (filtered, as CaCO3) 74 100.0 115.0 139.0 156.0 166.0 221.0 398.0 70331 % finer than 62 microns 73 32.0 35.0 54.3 72.4 82.0 89.7 93.0 80154 Suspended sediment 74 86.6 135.0 224.0 427.0 740.0 2000.0 3097.0
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 74 55 < 0.020 < 0.020 < 0.020 0.020 0.047 0.110 0.340
00613 NO2-N .010 74 72 < 0.010 < 0.010 < 0.010 0.015 0.027 0.060 0.119
00623 Org+NH3-N (filtered) .100 74 99 < 0.100 0.228 0.300 0.350 0.419 0.578 0.766
00625 Org+NH3-N (whole-water) .200 74 100 0.097 0.375 0.600 0.834 1.341 2.200 5.841
00631 NO2+NO3-N .050 74 99 < 0.050 0.314 0.930 1.300 1.700 2.339 3.170
00665 Total P (whole-water) .050 74 99 < 0.050 0.090 0.171 0.240 0.429 0.933 2.152
00666 Total P (filtered) .010 74 100 0.029 0.040 0.060 0.080 0.100 0.135 0.205
00671 PO4-P .010 74 100 0.004 0.043 0.060 0.071 0.091 0.130 0.155
00681 DOC .300 73 100 3.000 3.221 3.600 4.200 4.700 6.000 9.600
00689 SOC .200 75 88 0.300 0.500 1.400 2.297 4.100 > 10.00 > 10.00
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 74 100 36.00 43.55 51.35 57.97 62.50 68.00 75.00
00925 Magnesium .010 74 100 10.88 13.18 15.81 18.57 21.00 23.32 24.70
00930 Sodium .200 74 100 17.30 24.00 34.58 45.83 57.00 69.18 75.33
00935 Potassium .010 74 100 3.530 4.140 5.210 5.870 6.170 6.900 7.900
00940 Chloride .010 75 100 9.606 11.32 14.36 17.63 21.00 26.14 30.79
00945 Sulfate .010 75 100 53.03 71.35 101.7 129.7 170.0 200.1 219.9
00950 Fluoride .100 75 100 0.200 0.258 0.300 0.358 0.400 0.495 0.504
00955 Silica .010 74 100 4.860 7.226 8.699 10.04 11.58 14.13 15.00
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 1.0 74 96 < 1.0 1.0 2.0 2.0 2.7 3.6 4.0
01005 Barium 1.0 51 100 66.2 72.6 85.0 91.1 110.9 385.8 818.1
01010 Beryllium 1.0 51 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 70 100 40.4 45.1 66.0 83.3 109.9 147.2 201.6
01025 Cadmium 1.0 51 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 5.0 51 75 < 5.0 < 5.0 < 5.0 2.0 2.4 5.0 5.0
01035 Cobalt 3.0 51 0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0
01040 Copper 1.0 51 98 < 1.0 1.0 1.8 2.1 2.5 3.0 4.2
01046 Iron 10.0 74 61 < 10.0 < 10.0 < 10.0 12.0 41.2 171.0 1111
01049 Lead 1.0 51 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 51 65 < 1.0 < 1.0 < 1.0 2.0 3.0 9.0 12.0
01060 Molybdenum 10.0 51 94 < 10.0 < 10.0 2.1 3.0 3.6 10.0 10.0
01065 Nickel 1.0 51 100 1.0 1.8 2.1 2.4 3.0 3.9 5.8
01075 Silver 1.0 51 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 74 100 210.0 268.2 339.3 411.3 480.8 546.7 596.3
01085 Vanadium 10.0 74 12 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0 11.6
01090 Zinc 3.0 51 63 < 3.0 < 3.0 < 3.0 1.3 3.0 14.7 43.4
01095 Antimony 1.0 48 8 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.3 4.9
01106 Aluminum 10.0 51 94 < 10.0 < 10.0 2.7 7.0 18.8 53.9 58.0
01130 Lithium 4.0 74 100 10.6 13.3 21.0 29.4 38.0 46.0 50.0
01145 Selenium 2.4 74 89 < 2.4 < 2.4 1.4 1.8 2.0 2.5 2.9
22703 Uranium 1.0 48 100 2.0 2.4 3.3 4.0 4.7 5.0 5.1
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 .010 75 7 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.007 0.011
04028 Butylate .002 75 1 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.013
04035 Simazine .011 75 63 < 0.011 < 0.011 < 0.011 0.007 0.019 0.044 0.180
04037 Prometon .018 75 77 < 0.018 < 0.018 0.006 0.010 0.015 0.018 0.018
04040 Desethyl atrazine .002 75 100 0.004 0.005 0.012 0.027 0.068 0.180 0.273
04041 Cyanazine .018 75 83 < 0.018 < 0.018 0.010 0.021 0.106 1.000 1.500
04095 Fonofos .003 75 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .005 75 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
34653 p,p DDE .006 75 3 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .020 74 4 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 0.046
39341 gamma-HCH .004 75 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .005 75 1 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.005
39415 Metolachlor .002 75 100 0.023 0.032 0.068 0.177 0.663 1.690 3.010
39532 Malathion .027 75 0 < 0.027 < 0.027 < 0.027 < 0.027 < 0.027 < 0.027 < 0.027
39542 Parathion .007 75 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
39572 Diazinon .005 75 33 < 0.005 < 0.005 < 0.005 < 0.005 0.003 0.007 0.016
39632 Atrazine .001 75 100 0.064 0.074 0.134 0.265 1.240 4.500 7.400
46342 Alachlor .010 75 77 < 0.010 < 0.010 0.004 0.009 0.059 0.230 0.298
49260 Acetochlor .010 75 81 < 0.010 < 0.010 0.006 0.021 0.152 0.615 1.320
82630 Metribuzin .020 75 43 < 0.020 < 0.020 < 0.020 < 0.020 0.015 0.039 0.052
82660 Diethylanaline .003 75 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .009 75 19 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 0.006 0.013
82663 Ethalfluralin .009 75 0 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009 < 0.009
82664 Phorate .011 75 0 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011
82665 Terbacil .034 75 0 < 0.034 < 0.034 < 0.034 < 0.034 < 0.034 < 0.034 < 0.034
82666 Linuron .035 74 3 < 0.035 < 0.035 < 0.035 < 0.035 < 0.035 < 0.035 0.035
82667 Methyl parathion .020 75 4 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 0.072
82668 EPTC .002 75 19 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.004 0.009
82669 Pebulate .004 75 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .016 75 5 < 0.016 < 0.016 < 0.016 < 0.016 < 0.016 0.010 0.016
82671 Molinate .004 75 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .005 74 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
82673 Benfluralin .010 75 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82674 Carbofuran .020 75 8 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 0.012 0.032
82675 Terbufos .017 75 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82676 Pronamide .004 75 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82677 Disulfoton .021 75 1 < 0.021 < 0.021 < 0.021 < 0.021 < 0.021 < 0.021 0.021
82678 Triallate .002 75 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82679 Propanil .011 75 0 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011 < 0.011
82680 Carbaryl .041 75 3 < 0.041 < 0.041 < 0.041 < 0.041 < 0.041 < 0.041 0.041
82681 Thiobencarb .010 75 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82682 Dachthal (DCPA) .003 75 9 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.002 0.003
82683 Pendimethalin .010 75 3 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.023
82684 Napropamide .007 75 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82685 Propargite .023 75 0 < 0.023 < 0.023 < 0.023 < 0.023 < 0.023 < 0.023 < 0.023
82686 Azinphos methyl .050 73 0 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050
82687 Permethrin .006 75 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
91063 Diazinon-d10 (%) .100 74 100 3.760 46.57 87.65 95.60 104.8 133.2 143.8
91064 Terbuthylazin (%) .100 58 100 0.074 0.086 85.68 105.0 114.0 127.8 150.0
91065 HCH alpha-D6 (%) .100 74 100 3.200 54.04 81.41 93.45 102.0 124.0 157.0
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 53 100 0.50 0.70 1.00 1.10 1.40 3.00 4.00
29818 Arsenic (ppm) 0.10 53 100 5.90 6.00 7.50 8.70 9.80 12.90 15.50
29820 Barium (ppm) 1.00 53 100 230.0 530.0 650.0 680.0 700.0 730.0 760.0
29822 Beryllium (ppm) 0.10 53 100 0.80 0.90 1.10 1.30 1.50 1.80 1.80
29826 Cadmium (ppm) 0.10 53 96 < 0.10 0.20 0.40 0.40 0.60 0.70 1.30
29829 Chromium (ppm) 1.00 53 94 < 1.00 < 1.00 50.00 56.00 62.00 76.00 82.00
29832 Copper (ppm) 1.00 53 100 6.00 9.00 14.00 17.00 22.00 28.00 30.00
29836 Lead (ppm) 1.00 53 100 13.00 14.00 17.00 19.00 23.00 36.00 46.00
29839 Manganese (ppm) 10.0 53 100 210.0 230.0 600.0 780.0 940.0 1300 1600
29841 Mercury (ppm) 0.01 53 83 < 0.01 < 0.01 0.02 0.03 0.04 0.12 0.23
29843 Molybdenum (ppm) 5.00 53 2 < 5.00 < 5.00 < 5.00 < 5.00 < 25.00 < 25.00 25.00
29845 Nickel (ppm) 1.00 53 94 < 1.00 < 1.00 30.00 33.00 37.00 47.00 51.00
29847 Selenium (ppm) 0.10 53 100 0.30 0.40 0.60 0.80 1.00 2.40 3.60
29850 Silver (ppm) 0.50 53 4 < 0.50 < 0.50 < 0.50 < 0.50 < 2.50 < 2.50 2.50
29853 Vanadium (ppm) 1.00 53 100 34.00 41.00 63.00 80.00 94.00 110.0 120.0
29855 Zinc (ppm) 1.00 53 100 40.00 50.00 70.00 80.00 90.00 110.0 120.0
30221 Aluminum (%) 0.10 53 100 4.20 4.20 4.70 5.30 6.00 6.80 7.10
30244 Total carbon (%) 0.10 53 94 < 0.10 < 0.10 1.40 1.80 2.10 3.40 3.70
30269 Iron (%) 0.10 53 100 1.20 1.30 1.90 2.30 2.60 3.30 3.70
30292 Phosphorus (%) 0.01 53 100 0.05 0.05 0.06 0.08 0.09 0.11 0.13
30308 Sulfur (%) 0.10 48 83 < 0.10 < 0.10 0.10 0.30 0.60 1.20 1.60
30317 Titanium (%) 0.01 53 100 0.10 0.15 0.20 0.29 0.30 0.33 0.40
35031 Cobalt (ppm) 1.00 53 100 6.00 7.00 8.00 10.00 11.00 14.00 16.00
35040 Strontium (ppm) 0.01 53 100 150.0 160.0 190.0 210.0 240.0 300.0 330.0
35046 Uranium (ppm) 50.0 53 0 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0 < 250.0
35050 Lithium (ppm) 1.00 53 100 11.00 14.00 24.00 28.00 33.00 39.00 41.00
49955 Thallium (ppm) 50.0 53 0 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0 < 250.0
50279 Sediment (mg/L) 1.00 53 100 43.00 86.00 183.0 380.0 705.0 1423 2956
50465 Organic carbon (%) 0.10 53 96 < 0.10 0.50 1.10 1.40 1.80 3.60 3.60
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