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 3,920 9,970 23,800 57,900 119,000 268,000 520,000 Cubic meters per second 1,827 111 282 674 1,640 3,370 7,589 14,725
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) 51 2.5 4.0 9.2 15.0 24.3 28.9 30.0 00076 Turbidity (NTU) 51 1.0 1.5 3.1 13.0 23.0 72.0 340.0 00095 Conductance (uS/cm) 51 153.0 206.0 273.0 304.0 395.0 529.0 567.0 00300 Dissolved oxygen 49 5.6 6.0 7.6 9.1 11.3 13.8 18.8 00400 pH (standard units) 51 6.9 7.1 7.2 7.3 7.6 7.7 8.1 00453 HCO3 (filtered) 49 25.0 34.0 48.0 56.0 64.0 85.0 99.0 39086 Alk (filtered, as CaCO3) 48 20.0 28.0 39.0 45.5 52.0 70.0 81.0 70331 % finer than 62 microns 49 20.0 77.0 92.8 97.4 98.4 99.6 99.8 80154 Suspended sediment 49 5.0 6.0 10.0 35.0 61.0 259.0 617.0
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 51 80 < 0.020 < 0.020 0.029 0.045 0.083 0.127 0.239
00613 NO2-N .010 51 86 < 0.010 < 0.010 0.012 0.020 0.030 0.073 0.108
00623 Org+NH3-N (filtered) .200 51 80 < 0.200 < 0.200 0.200 0.217 0.282 0.376 0.667
00625 Org+NH3-N (whole-water) .200 51 98 < 0.200 0.200 0.275 0.368 0.433 0.845 0.903
00631 NO2+NO3-N .050 51 98 < 0.050 0.554 0.708 0.851 1.020 1.410 5.174
00665 Total P (whole-water) .010 51 94 < 0.010 < 0.010 0.023 0.052 0.080 0.229 0.307
00666 Total P (filtered) .050 51 65 < 0.050 < 0.050 < 0.050 0.013 0.020 0.050 0.064
00671 PO4-P .001 51 90 < 0.001 < 0.001 0.001 0.007 0.013 0.034 0.048
00681 DOC .300 50 100 1.600 1.900 2.165 2.650 3.200 4.900 5.300
00689 SOC .200 50 98 0.300 0.300 0.400 0.700 1.000 3.600 > 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 51 100 16.00 20.00 25.76 29.41 34.48 41.84 45.89
00925 Magnesium .010 51 100 4.100 5.607 7.700 8.631 10.62 14.04 15.21
00930 Sodium .200 51 100 7.000 8.551 12.33 16.81 23.96 38.90 47.33
00935 Potassium .010 51 100 1.600 1.680 1.810 2.240 2.770 3.800 4.350
00940 Chloride .010 51 100 8.200 9.500 14.00 18.98 25.60 41.34 60.24
00945 Sulfate .010 51 100 30.00 40.00 54.88 64.78 83.76 113.2 131.2
00950 Fluoride .100 51 82 < 0.100 < 0.100 0.102 0.136 0.193 0.294 0.368
00955 Silica .010 51 100 1.618 2.207 3.423 4.864 5.600 5.961 6.335
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 8 < 2.0 < 2.0 < 2.0 < 2.0 < 2.0 2.0 2.2
01005 Barium 1.0 36 100 28.0 30.1 33.7 37.6 45.7 56.0 57.1
01010 Beryllium 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 51 100 19.0 20.9 24.0 33.5 51.3 74.5 111.9
01025 Cadmium 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 36 17 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.2 1.4
01035 Cobalt 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01040 Copper 1.0 36 97 < 1.0 1.0 1.2 1.7 2.1 2.8 3.1
01046 Iron 10.0 51 65 < 10.0 < 10.0 < 10.0 10.0 16.8 28.2 77.0
01049 Lead 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 36 100 1.4 1.8 3.9 13.3 28.4 57.9 64.0
01060 Molybdenum 1.0 36 81 < 1.0 < 1.0 1.0 1.7 2.9 6.4 7.8
01065 Nickel 1.0 36 97 < 1.0 1.0 1.5 1.7 2.2 2.8 3.0
01075 Silver 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 51 100 85.0 110.0 150.0 171.1 218.9 286.7 309.2
01085 Vanadium 10.0 51 2 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0
01090 Zinc 1.0 36 86 < 1.0 < 1.0 1.2 1.7 3.6 6.0 7.6
01095 Antimony 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 1.0 36 100 4.5 6.7 8.8 10.8 13.4 19.8 20.8
01130 Lithium 4.0 51 90 < 4.0 < 4.0 5.4 6.0 8.2 12.2 15.2
01145 Selenium 2.4 51 2 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4
22703 Uranium 1.0 36 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
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 51 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 51 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .005 51 88 < 0.005 < 0.005 0.007 0.014 0.028 0.154 0.285
04037 Prometon .018 51 67 < 0.018 < 0.018 < 0.018 0.018 0.018 0.021 0.028
04040 Desethyl atrazine .002 51 98 < 0.002 0.004 0.007 0.010 0.021 0.073 0.100
04041 Cyanazine .010 51 39 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.131 0.236
04095 Fonofos .003 51 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .023 51 2 < 0.023 < 0.023 < 0.023 < 0.023 < 0.023 < 0.023 0.023
34653 p,p DDE .006 51 2 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .090 51 20 < 0.090 < 0.090 < 0.090 < 0.090 < 0.090 0.005 0.090
39341 gamma-HCH .004 51 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 51 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 51 98 < 0.002 0.005 0.009 0.015 0.046 0.440 0.903
39532 Malathion .005 51 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
39542 Parathion .004 51 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 51 35 < 0.002 < 0.002 < 0.002 < 0.002 0.004 0.007 0.010
39632 Atrazine .001 51 98 < 0.001 0.010 0.018 0.039 0.128 1.180 1.480
46342 Alachlor .002 51 18 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.020 0.039
49260 Acetochlor .010 51 39 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.130 0.276
82630 Metribuzin .004 51 20 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.030 0.062
82660 Diethylanaline .003 51 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 51 6 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.005
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 .015 51 4 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015 < 0.015 0.024
82669 Pebulate .004 51 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .010 51 35 < 0.010 < 0.010 < 0.010 < 0.010 0.010 0.014 0.022
82671 Molinate .004 51 2 < 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 4 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030 < 0.030 0.030
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 39 < 0.003 < 0.003 < 0.003 < 0.003 0.007 0.017 0.035
82681 Thiobencarb .002 51 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 51 4 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
82683 Pendimethalin .004 51 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .003 51 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .100 50 0 < 0.100 < 0.100 < 0.100 < 0.100 < 0.100 < 0.100 < 0.100
82686 Azinphos methyl .500 51 2 < 0.500 < 0.500 < 0.500 < 0.500 < 0.500 < 0.500 0.500
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 78.72 83.91 92.66 100.9 109.2 122.3 149.6
91064 Terbuthylazin (%) .100 37 100 0.007 0.034 104.4 112.2 121.9 176.4 178.9
91065 HCH alpha-D6 (%) .100 51 100 70.72 73.40 86.90 92.55 100.8 112.2 126.3
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 34 100 0.80 0.90 1.10 1.30 1.90 3.40 5.90
29818 Arsenic (ppm) 0.10 34 100 5.80 6.40 12.90 14.05 18.00 21.00 21.00
29820 Barium (ppm) 1.00 34 100 260.0 280.0 460.0 530.0 560.0 640.0 720.0
29822 Beryllium (ppm) 0.10 34 100 0.70 0.80 2.40 2.75 3.00 3.40 3.60
29826 Cadmium (ppm) 0.10 34 97 < 0.30 0.30 0.50 0.70 1.00 1.50 1.50
29829 Chromium (ppm) 1.00 34 100 48.00 51.00 85.00 92.50 100.0 160.0 170.0
29832 Copper (ppm) 1.00 34 100 20.00 21.00 34.00 39.00 46.00 66.00 66.00
29836 Lead (ppm) 1.00 34 100 19.00 25.00 37.00 42.50 49.00 58.00 62.00
29839 Manganese (ppm) 10.0 34 100 860.0 1100 1900 2450 3300 4200 4900
29841 Mercury (ppm) 0.01 24 88 < 0.01 < 0.01 0.05 0.09 0.12 0.17 0.23
29843 Molybdenum (ppm) 5.00 34 24 < 5.00 < 5.00 < 5.00 < 10.00 < 12.00 28.00 50.00
29845 Nickel (ppm) 1.00 34 100 31.00 46.00 69.00 80.50 91.00 120.0 130.0
29847 Selenium (ppm) 0.10 34 100 0.40 0.70 1.00 1.20 1.60 2.40 2.60
29850 Silver (ppm) 0.50 34 6 < 0.50 < 0.50 < 0.50 < 1.00 < 1.00 2.50 5.00
29853 Vanadium (ppm) 1.00 34 100 31.00 37.00 90.00 100.0 110.0 130.0 140.0
29855 Zinc (ppm) 1.00 34 100 100.0 140.0 200.0 240.0 300.0 380.0 450.0
30221 Aluminum (%) 0.10 34 100 2.30 2.80 6.70 7.75 8.10 10.00 10.30
30244 Total carbon (%) 0.10 24 100 2.90 3.20 3.35 3.75 4.15 5.20 6.00
30269 Iron (%) 0.10 34 100 1.20 1.30 4.00 4.35 4.80 5.30 5.60
30292 Phosphorus (%) 0.01 34 100 0.06 0.07 0.10 0.12 0.14 0.17 0.21
30308 Sulfur (%) 0.10 21 100 0.10 0.10 0.30 0.70 1.40 1.90 2.00
30317 Titanium (%) 0.01 34 100 0.12 0.13 0.40 0.43 0.50 0.59 0.60
35031 Cobalt (ppm) 1.00 34 100 7.00 9.00 22.00 30.50 36.00 44.00 51.00
35040 Strontium (ppm) 0.01 34 100 110.0 110.0 140.0 180.0 280.0 510.0 660.0
35046 Uranium (ppm) 50.0 34 3 < 50.00 < 50.00 < 50.00 < 100.0 < 100.0 < 250.0 500.0
35050 Lithium (ppm) 1.00 34 100 36.00 39.00 54.00 63.50 69.00 75.00 79.00
49955 Thallium (ppm) 50.0 34 0 < 50.00 < 50.00 < 50.00 < 100.0 < 100.0 < 250.0 < 500.0
50279 Sediment (mg/L) 1.00 34 100 5.00 7.00 12.00 33.00 70.00 284.0 693.0
50465 Organic carbon (%) 0.10 17 100 0.90 0.90 3.30 3.60 3.80 4.90 4.90
Return to Results