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 1,827 500 840 1,840 3,500 8,890 20,600 81,900 Cubic meters per second 1,827 14 24 52 99 252 583 2,319
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) 43 0.0 0.0 1.9 12.1 21.7 24.9 27.0 00076 Turbidity (NTU) 4 5.2 5.2 15.1 45.0 112.5 160.0 160.0 00095 Conductance (uS/cm) 43 486.0 552.0 710.0 819.0 942.0 1034.0 1152.0 00300 Dissolved oxygen 43 6.0 6.5 7.6 9.3 11.6 13.6 14.1 00400 pH (standard units) 43 7.3 7.4 7.8 8.1 8.2 8.3 8.4 00452 CO3 (filtered) 38 0.0 0.0 0.0 0.0 0.0 7.2 10.8 00453 HCO3 (filtered) 43 177.0 188.0 251.0 288.0 323.0 388.0 432.0 39086 Alk (filtered, as CaCO3) 43 145.0 154.0 212.0 236.0 267.0 318.0 354.0 70331 % finer than 62 microns 41 17.7 26.7 65.7 78.0 90.8 97.5 99.3 80154 Suspended sediment 41 56.0 84.0 138.0 199.0 245.0 511.0 595.0
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 43 74 < 0.020 < 0.020 < 0.020 0.046 0.220 0.390 0.463
00613 NO2-N .010 43 93 < 0.010 < 0.010 0.020 0.030 0.059 0.082 0.100
00623 Org+NH3-N (filtered) .200 43 100 0.396 0.400 0.500 0.622 0.823 1.077 1.200
00625 Org+NH3-N (whole-water) .200 43 100 0.621 0.800 1.000 1.293 1.500 1.960 2.096
00631 NO2+NO3-N .050 43 98 < 0.050 0.442 2.800 4.000 6.502 10.47 13.01
00665 Total P (whole-water) .010 43 100 0.039 0.083 0.146 0.210 0.307 0.460 0.600
00666 Total P (filtered) .010 43 93 < 0.010 < 0.010 0.047 0.080 0.125 0.182 0.200
00671 PO4-P .010 43 93 < 0.010 < 0.010 0.050 0.076 0.123 0.170 0.180
00681 DOC .300 42 100 4.700 4.700 5.400 6.150 6.400 7.600 8.200
00689 SOC .200 40 95 0.200 0.250 1.300 2.750 3.850 5.000 > 7.300
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 43 100 58.00 60.08 76.00 91.00 101.7 120.0 136.8
00925 Magnesium .010 43 100 22.00 24.00 33.00 40.61 47.00 53.00 60.07
00930 Sodium .200 43 100 8.800 9.027 15.00 18.00 23.52 35.00 38.08
00935 Potassium .010 43 100 3.080 3.570 4.020 4.280 5.000 5.530 7.400
00940 Chloride .010 43 100 9.914 13.00 17.00 21.23 27.00 39.61 40.97
00945 Sulfate .010 43 100 65.00 72.00 110.0 140.0 180.6 223.8 239.8
00950 Fluoride .100 43 100 0.200 0.246 0.300 0.353 0.400 0.416 0.425
00955 Silica .010 43 100 5.746 10.68 14.95 17.89 21.00 23.26 24.15
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 4 75 < 1.0 < 1.0 < 1.0 2.0 2.5 3.0 3.0
01005 Barium 1.0 4 100 45.0 45.0 47.5 59.5 70.5 72.0 72.0
01010 Beryllium 1.0 4 25 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.0 1.0
01020 Boron 16.0 2 100 40.0 40.0 40.0 58.0 76.0 76.0 76.0
01025 Cadmium 1.0 4 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 5.0 4 50 < 5.0 < 5.0 < 5.0 < 5.0 5.0 5.0 5.0
01035 Cobalt 3.0 4 0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0
01040 Copper 1.0 4 100 1.0 1.0 1.0 1.5 2.5 3.0 3.0
01046 Iron 10.0 43 44 < 10.0 < 10.0 < 10.0 < 10.0 10.0 18.1 30.0
01049 Lead 1.0 4 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 4.0 43 74 < 4.0 < 4.0 < 4.0 5.0 38.5 110.0 154.5
01060 Molybdenum 10.0 4 50 < 10.0 < 10.0 < 10.0 < 10.0 10.0 10.0 10.0
01065 Nickel 1.0 4 100 2.0 2.0 2.5 3.5 5.0 6.0 6.0
01075 Silver 1.0 4 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 4 100 180.0 180.0 220.0 270.0 355.0 430.0 430.0
01085 Vanadium 6.0 4 0 < 6.0 < 6.0 < 6.0 < 6.0 < 6.0 < 6.0 < 6.0
01090 Zinc 1.0 4 100 4.0 4.0 4.5 5.5 15.0 24.0 24.0
01095 Antimony 1.0 2 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 10.0 4 50 < 10.0 < 10.0 < 10.0 < 10.0 10.0 10.0 10.0
01130 Lithium 4.0 4 100 17.0 17.0 21.0 26.0 35.0 43.0 43.0
01145 Selenium 1.0 4 75 < 1.0 < 1.0 < 1.0 1.5 2.0 2.0 2.0
22703 Uranium 1.0 2 100 7.0 7.0 7.0 7.5 8.0 8.0 8.0
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 40 10 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 0.012 0.016
04028 Butylate .002 40 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .005 40 20 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.008 0.010
04037 Prometon .018 40 68 < 0.018 < 0.018 < 0.018 0.018 0.018 0.025 0.027
04040 Desethyl atrazine .002 40 100 0.007 0.008 0.012 0.018 0.024 0.088 0.111
04041 Cyanazine .010 39 69 < 0.010 < 0.010 < 0.010 0.015 0.028 0.880 1.000
04095 Fonofos .003 40 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 40 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 40 5 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .004 40 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39341 gamma-HCH .004 40 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 40 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 40 100 0.033 0.043 0.077 0.134 0.447 1.285 1.400
39532 Malathion .005 40 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
39542 Parathion .004 40 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 40 3 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
39632 Atrazine .001 40 100 0.028 0.032 0.051 0.081 0.152 1.090 1.800
46342 Alachlor .002 40 68 < 0.002 < 0.002 < 0.002 0.008 0.017 0.143 0.490
49260 Acetochlor .016 40 80 < 0.016 < 0.016 0.010 0.019 0.085 0.981 1.500
82630 Metribuzin .004 40 10 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.031 0.060
82660 Diethylanaline .003 40 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 40 30 < 0.002 < 0.002 < 0.002 < 0.002 0.003 0.013 0.015
82663 Ethalfluralin .004 40 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 40 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 40 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .002 40 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 40 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .008 39 26 < 0.008 < 0.008 < 0.008 < 0.008 0.004 0.045 0.065
82669 Pebulate .010 40 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82670 Tebuthiuron .010 40 3 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.010
82671 Molinate .004 40 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 40 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 40 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .200 39 8 < 0.200 < 0.200 < 0.200 < 0.200 < 0.200 0.160 0.200
82675 Terbufos .013 40 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 40 3 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.012
82677 Disulfoton .017 40 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 40 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82679 Propanil .004 40 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 40 8 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.007 0.030
82681 Thiobencarb .002 40 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 39 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82683 Pendimethalin .004 40 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .003 40 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .096 40 3 < 0.096 < 0.096 < 0.096 < 0.096 < 0.096 < 0.096 0.096
82686 Azinphos methyl .001 40 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82687 Permethrin .005 40 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 40 100 0.000 85.10 96.86 103.8 111.1 132.0 182.0
91064 Terbuthylazin (%) .100 40 100 0.000 92.25 102.9 110.8 120.2 140.6 146.0
91065 HCH alpha-D6 (%) .100 40 100 0.000 81.16 93.69 99.55 111.0 120.0 121.5
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 6 100 0.50 0.50 0.60 0.60 0.70 1.00 1.00
29818 Arsenic (ppm) 0.10 6 100 5.30 5.30 5.60 7.10 8.50 11.90 11.90
29820 Barium (ppm) 1.00 6 100 360.0 360.0 470.0 500.0 510.0 530.0 530.0
29822 Beryllium (ppm) 0.10 6 100 0.80 0.80 1.00 1.10 1.20 1.90 1.90
29826 Cadmium (ppm) 0.10 6 83 < 0.30 < 0.30 0.30 0.45 0.50 0.50 0.50
29829 Chromium (ppm) 1.00 6 67 < 1.00 < 1.00 < 1.00 48.00 53.00 71.00 71.00
29832 Copper (ppm) 1.00 6 100 15.00 15.00 17.00 17.00 25.00 28.00 28.00
29836 Lead (ppm) 1.00 6 100 23.00 23.00 24.00 24.00 26.00 26.00 26.00
29839 Manganese (ppm) 10.0 6 100 1000 1000 1100 1250 1800 2100 2100
29841 Mercury (ppm) 0.01 6 100 0.03 0.03 0.05 0.05 0.06 0.07 0.07
29843 Molybdenum (ppm) 5.00 6 0 < 5.00 < 5.00 < 5.00 < 25.00 < 25.00 < 25.00 < 25.00
29845 Nickel (ppm) 1.00 6 67 < 1.00 < 1.00 < 1.00 26.00 41.00 42.00 42.00
29847 Selenium (ppm) 0.10 6 100 0.70 0.70 0.80 1.15 1.20 1.40 1.40
29850 Silver (ppm) 0.50 6 17 < 2.00 < 2.00 < 2.50 < 2.50 < 2.50 2.50 2.50
29853 Vanadium (ppm) 1.00 6 100 64.00 64.00 74.00 84.00 91.00 140.0 140.0
29855 Zinc (ppm) 1.00 6 100 80.00 80.00 80.00 100.0 110.0 120.0 120.0
30221 Aluminum (%) 0.10 6 100 3.70 3.70 4.70 4.75 5.10 6.40 6.40
30244 Total carbon (%) 0.10 6 100 2.70 2.70 3.30 3.80 5.00 9.20 9.20
30269 Iron (%) 0.10 6 100 1.90 1.90 2.10 2.35 2.80 3.30 3.30
30292 Phosphorus (%) 0.01 6 100 0.09 0.09 0.10 0.10 0.13 0.20 0.20
30308 Sulfur (%) 0.10 6 67 < 0.10 < 0.10 < 0.20 0.40 0.50 0.70 0.70
30317 Titanium (%) 0.01 6 100 0.20 0.20 0.20 0.30 0.30 0.30 0.30
35031 Cobalt (ppm) 1.00 6 100 8.00 8.00 9.00 9.00 10.00 12.00 12.00
35040 Strontium (ppm) 0.01 6 100 150.0 150.0 160.0 170.0 200.0 210.0 210.0
35046 Uranium (ppm) 50.0 6 0 < 250.0 < 250.0 < 250.0 < 250.0 < 250.0 < 250.0 < 250.0
35050 Lithium (ppm) 1.00 6 100 18.00 18.00 21.00 27.50 32.00 34.00 34.00
49955 Thallium (ppm) 50.0 6 0 < 250.0 < 250.0 < 250.0 < 250.0 < 250.0 < 250.0 < 250.0
50279 Sediment (mg/L) 1.00 6 100 107.0 107.0 117.0 140.5 359.0 393.0 393.0
50465 Organic carbon (%) 0.10 6 100 1.70 1.70 2.10 2.65 3.50 6.00 6.00
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