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 2,410 3,220 4,140 5,280 8,030 21,100 40,500 Cubic meters per second 1,827 68 91 117 150 227 597 1,147
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) 53 0.0 4.0 10.0 15.0 18.5 23.0 25.0 00076 Turbidity (NTU) 53 2.1 2.9 22.0 45.0 99.0 700.0 980.0 00095 Conductance (uS/cm) 53 340.0 350.0 580.0 890.0 1040.0 1160.0 1270.0 00300 Dissolved oxygen 52 6.8 6.9 7.8 8.5 9.7 12.3 13.3 00400 pH (standard units) 53 8.0 8.0 8.2 8.3 8.4 8.5 8.6 00452 CO3 (filtered) 53 0.0 0.0 0.0 0.0 5.0 8.0 11.0 00453 HCO3 (filtered) 53 89.0 98.0 124.0 150.0 168.0 187.0 195.0 39086 Alk (filtered, as CaCO3) 53 73.0 80.0 107.0 128.0 144.0 160.0 165.0 70331 % finer than 62 microns 51 47.0 55.0 76.0 91.0 100.0 100.0 100.0 80154 Suspended sediment 52 23.0 45.0 82.5 156.5 602.5 2370.0 3303.0
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 53 47 < 0.020 < 0.020 < 0.020 < 0.020 0.035 0.080 0.112
00613 NO2-N .010 53 38 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.020 0.027
00623 Org+NH3-N (filtered) .200 52 67 < 0.200 < 0.200 < 0.200 0.200 0.222 0.300 0.502
00625 Org+NH3-N (whole-water) .200 52 98 < 0.200 0.235 0.331 0.456 0.591 2.533 3.433
00631 NO2+NO3-N .050 53 100 0.145 0.191 0.289 0.366 0.509 0.741 1.000
00665 Total P (whole-water) .050 53 94 < 0.050 < 0.050 0.051 0.126 0.203 1.381 1.951
00666 Total P (filtered) .050 53 60 < 0.050 < 0.050 < 0.050 0.010 0.019 0.050 0.067
00671 PO4-P .010 53 83 < 0.010 < 0.010 0.001 0.007 0.010 0.016 0.019
00681 DOC .300 46 100 1.500 2.500 3.000 3.385 4.000 5.100 8.200
00689 SOC .200 51 88 0.300 0.400 0.900 1.500 3.600 > 10.00 > 220.0
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 53 100 32.19 35.13 52.69 73.13 85.00 103.4 120.0
00925 Magnesium .010 53 100 7.791 8.805 14.41 21.94 28.00 31.80 35.00
00930 Sodium .200 53 100 16.17 18.07 36.82 70.00 86.98 100.0 111.9
00935 Potassium .010 53 100 1.360 1.390 2.400 3.030 3.670 4.070 4.400
00940 Chloride .010 53 100 11.14 12.74 35.53 62.48 90.44 110.0 124.9
00945 Sulfate .010 53 100 59.40 61.80 119.3 212.8 252.8 315.7 370.0
00950 Fluoride .100 53 100 0.140 0.156 0.257 0.301 0.348 0.428 0.436
00955 Silica .010 53 100 5.375 6.400 8.773 9.300 9.702 10.60 11.61
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 51 43 < 2.0 < 2.0 < 2.0 < 2.0 1.2 2.0 2.0
01005 Barium 1.0 41 100 38.8 41.1 50.0 56.0 62.0 69.0 75.0
01010 Beryllium 1.0 39 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 51 100 16.2 22.2 32.9 53.9 67.8 79.1 97.1
01025 Cadmium 1.0 39 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 39 56 < 1.0 < 1.0 < 1.0 1.0 1.6 2.6 3.3
01035 Cobalt 3.0 41 0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0
01040 Copper 1.0 39 92 < 1.0 < 1.0 1.3 1.9 2.3 4.0 6.0
01046 Iron 10.0 53 42 < 10.0 < 10.0 < 10.0 < 10.0 10.0 14.3 22.4
01049 Lead 1.0 39 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 41 73 < 1.0 < 1.0 < 1.0 2.0 5.0 15.0 16.9
01060 Molybdenum 10.0 41 98 < 10.0 2.5 3.5 5.0 6.0 7.8 10.0
01065 Nickel 1.0 41 73 < 1.0 < 1.0 < 1.0 1.4 2.0 2.8 6.0
01075 Silver 1.0 41 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 53 100 271.9 305.7 486.5 776.3 918.1 1136 1400
01085 Vanadium 10.0 53 2 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0
01090 Zinc 1.0 39 82 < 1.0 < 1.0 1.0 1.5 2.3 5.1 8.3
01095 Antimony 1.0 39 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 10.0 41 90 < 10.0 < 10.0 1.9 3.0 5.0 10.0 11.0
01130 Lithium 4.0 53 100 4.0 8.4 17.0 28.2 33.3 42.1 49.0
01145 Selenium 2.4 53 92 < 2.4 < 2.4 2.0 3.0 4.0 5.1 7.0
22703 Uranium 1.0 39 100 1.3 1.4 2.0 3.7 4.4 6.6 7.0
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 48 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 48 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .010 48 2 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010
04037 Prometon .018 48 4 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 < 0.018 0.018
04040 Desethyl atrazine .005 48 19 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.004 0.005
04041 Cyanazine .004 48 13 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.010 0.023
04095 Fonofos .003 48 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 48 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .012 48 10 < 0.012 < 0.012 < 0.012 < 0.012 < 0.012 0.006 0.012
38933 Chlorpyrifos .004 48 4 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004
39341 gamma-HCH .004 48 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 48 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .004 48 65 < 0.004 < 0.004 < 0.004 0.004 0.007 0.013 0.018
39532 Malathion .005 48 10 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.005 0.008
39542 Parathion .004 48 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 48 15 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.004 0.008
39632 Atrazine .008 48 60 < 0.008 < 0.008 < 0.008 0.004 0.007 0.012 0.020
46342 Alachlor .007 48 42 < 0.007 < 0.007 < 0.007 < 0.007 0.007 0.015 0.050
49260 Acetochlor .010 48 10 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.009 0.042
82630 Metribuzin .004 48 2 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.006
82660 Diethylanaline .003 48 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .005 48 2 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.005
82663 Ethalfluralin .004 48 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 48 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 48 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .006 48 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82667 Methyl parathion .006 48 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .020 48 6 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 0.010 0.020
82669 Pebulate .004 48 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 48 2 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010
82671 Molinate .004 48 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 48 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .005 48 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
82674 Carbofuran .080 48 10 < 0.080 < 0.080 < 0.080 < 0.080 < 0.080 0.040 0.080
82675 Terbufos .013 48 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 48 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 48 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 48 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82679 Propanil .004 48 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .015 48 4 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015 0.015
82681 Thiobencarb .002 48 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .004 48 56 < 0.004 < 0.004 < 0.004 0.002 0.003 0.007 0.008
82683 Pendimethalin .004 48 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .003 48 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 46 2 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 0.013
82686 Azinphos methyl .150 47 2 < 0.150 < 0.150 < 0.150 < 0.150 < 0.150 < 0.150 0.150
82687 Permethrin .005 48 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 48 100 71.40 83.16 94.85 100.9 108.7 119.5 123.9
91064 Terbuthylazin (%) .100 33 100 89.92 94.74 102.6 109.2 116.2 128.2 131.7
91065 HCH alpha-D6 (%) .100 48 100 72.04 76.90 89.00 97.80 104.4 114.3 127.0
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 41 100 0.60 0.80 1.10 1.60 3.50 8.20 24.00
29818 Arsenic (ppm) 0.10 41 100 3.30 4.10 5.50 6.30 7.60 10.80 14.40
29820 Barium (ppm) 1.00 41 100 110.0 260.0 320.0 420.0 500.0 600.0 630.0
29822 Beryllium (ppm) 0.10 41 100 0.60 0.60 0.90 1.20 1.40 1.70 2.30
29826 Cadmium (ppm) 0.10 41 95 < 0.20 0.30 0.60 0.80 0.90 1.30 3.00
29829 Chromium (ppm) 1.00 41 93 < 1.00 < 1.00 44.00 53.00 74.00 95.00 130.0
29832 Copper (ppm) 1.00 41 100 9.00 13.00 16.00 18.00 21.00 24.00 51.00
29836 Lead (ppm) 1.00 41 100 11.00 14.00 18.00 25.00 33.00 48.00 96.00
29839 Manganese (ppm) 10.0 41 100 210.0 240.0 380.0 460.0 520.0 570.0 740.0
29841 Mercury (ppm) 0.01 36 75 < 0.01 < 0.01 0.01 0.03 0.04 0.08 0.10
29843 Molybdenum (ppm) 5.00 40 43 < 5.00 < 5.00 < 5.00 < 7.50 10.00 37.50 50.00
29845 Nickel (ppm) 1.00 41 93 < 1.00 < 1.00 26.00 30.00 40.00 53.00 76.00
29847 Selenium (ppm) 0.10 41 98 < 0.60 0.70 1.10 1.70 2.60 3.10 4.30
29850 Silver (ppm) 0.50 41 5 < 0.50 < 0.50 < 0.50 < 1.00 < 2.50 < 5.00 15.00
29853 Vanadium (ppm) 1.00 41 100 31.00 36.00 57.00 71.00 84.00 110.0 160.0
29855 Zinc (ppm) 1.00 41 100 50.00 60.00 80.00 100.0 120.0 140.0 160.0
30221 Aluminum (%) 0.10 41 100 2.20 2.60 3.40 4.70 5.30 6.60 7.60
30244 Total carbon (%) 0.10 35 86 < 0.10 < 0.10 2.40 2.90 3.30 5.80 6.60
30269 Iron (%) 0.10 41 100 0.90 1.00 1.60 1.90 2.20 2.50 3.10
30292 Phosphorus (%) 0.01 41 100 0.03 0.04 0.05 0.06 0.07 0.10 0.11
30308 Sulfur (%) 0.10 32 84 < 0.10 < 0.10 0.10 0.70 2.05 4.90 5.10
30317 Titanium (%) 0.01 41 100 0.10 0.10 0.18 0.20 0.27 0.30 0.34
35031 Cobalt (ppm) 1.00 41 100 3.00 3.00 6.00 7.00 8.00 10.00 23.00
35040 Strontium (ppm) 0.01 41 100 170.0 220.0 280.0 400.0 610.0 810.0 1800
35046 Uranium (ppm) 50.0 40 3 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 250.0 250.0
35050 Lithium (ppm) 1.00 41 100 15.00 23.00 31.00 35.00 43.00 49.00 56.00
49955 Thallium (ppm) 50.0 40 0 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 < 250.0 250.0
50279 Sediment (mg/L) 1.00 41 100 6.90 24.00 126.0 254.0 542.0 1517 2440
50465 Organic carbon (%) 0.10 35 83 < 0.10 < 0.10 0.90 1.30 1.60 2.30 3.20
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