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 28 2,462 11,474 29,022 76,022 160,550 251,394 Cubic meters per second 1,827 1 70 325 822 2,153 4,546 7,119
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) 57 3.7 6.8 12.5 20.7 28.3 31.0 32.2 00076 Turbidity (NTU) 57 1.1 1.5 3.7 10.0 22.0 76.0 184.0 00095 Conductance (uS/cm) 57 275.0 338.0 432.0 552.0 741.0 944.0 1266.0 00300 Dissolved oxygen 57 4.4 5.5 6.3 8.1 10.1 12.4 14.6 00400 pH (standard units) 57 6.9 7.2 7.6 7.8 8.0 8.4 8.5 00452 CO3 (filtered) 57 0.0 0.0 0.0 0.0 0.0 0.0 0.0 00453 HCO3 (filtered) 57 46.0 58.0 92.0 103.0 117.0 143.0 146.0 39086 Alk (filtered, as CaCO3) 57 38.0 48.0 75.0 85.0 96.0 117.0 120.0 70331 % finer than 62 microns 55 44.2 48.0 84.2 92.3 96.0 99.0 99.0 80154 Suspended sediment 55 7.0 10.0 30.0 53.0 80.0 226.0 413.0
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 57 88 < 0.020 < 0.020 0.039 0.053 0.085 0.160 0.308
00613 NO2-N .010 57 51 < 0.010 < 0.010 < 0.010 0.010 0.020 0.039 0.064
00623 Org+NH3-N (filtered) .200 57 95 < 0.200 < 0.200 0.300 0.328 0.388 0.460 0.722
00625 Org+NH3-N (whole-water) .200 57 100 0.300 0.340 0.477 0.504 0.594 0.800 1.039
00631 NO2+NO3-N .050 57 88 < 0.050 < 0.050 0.120 0.390 0.455 0.672 0.795
00665 Total P (whole-water) .010 57 100 0.030 0.038 0.066 0.080 0.109 0.162 0.325
00666 Total P (filtered) .010 57 98 < 0.010 0.010 0.032 0.048 0.064 0.087 0.100
00671 PO4-P .010 56 100 0.007 0.019 0.031 0.044 0.057 0.084 0.095
00681 DOC .300 54 100 3.100 3.500 3.792 4.191 4.800 5.800 9.900
00689 SOC .200 53 98 0.200 0.200 0.400 0.600 1.100 2.000 > 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 55 100 19.00 22.00 30.00 36.25 41.58 51.07 53.28
00925 Magnesium .010 55 100 5.400 5.800 7.632 10.00 11.69 16.00 16.81
00930 Sodium .200 55 100 20.00 28.00 42.00 58.00 75.00 110.0 190.0
00935 Potassium .010 55 100 2.400 2.500 3.000 3.620 4.280 4.680 5.000
00940 Chloride .010 57 100 27.00 30.89 61.69 79.71 115.1 180.0 290.0
00945 Sulfate .010 57 100 24.00 31.00 42.00 54.00 68.05 101.7 114.0
00950 Fluoride .100 57 98 < 0.100 0.100 0.149 0.200 0.203 0.256 0.300
00955 Silica .010 55 100 0.167 0.231 2.762 4.760 6.032 7.399 8.259
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 55 73 < 2.0 < 2.0 < 2.0 1.3 2.0 2.6 3.4
01005 Barium 1.0 45 100 46.0 55.0 63.6 75.8 91.0 106.1 108.0
01010 Beryllium 1.0 45 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 51 100 30.3 31.9 37.5 49.9 64.6 71.7 78.3
01025 Cadmium 1.0 45 2 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 2.0
01030 Chromium 5.0 44 50 < 5.0 < 5.0 < 5.0 < 5.0 1.6 2.3 5.0
01035 Cobalt 3.0 45 2 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 3.0
01040 Copper 1.0 45 98 < 1.0 1.0 1.9 2.0 2.5 4.9 8.0
01046 Iron 10.0 55 58 < 10.0 < 10.0 < 10.0 10.0 14.8 36.8 95.7
01049 Lead 1.0 45 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 45 73 < 1.0 < 1.0 < 1.0 2.0 4.7 11.0 29.0
01060 Molybdenum 10.0 45 56 < 10.0 < 10.0 < 10.0 1.0 1.5 2.0 10.0
01065 Nickel 1.0 45 100 1.0 1.0 1.4 1.7 2.0 2.3 5.0
01075 Silver 1.0 45 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 55 100 150.0 160.0 220.0 309.0 367.7 475.1 488.0
01085 Vanadium 10.0 55 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01090 Zinc 3.0 45 82 < 3.0 < 3.0 1.2 1.7 2.9 5.0 13.0
01095 Antimony 1.0 43 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 1.0 45 100 2.0 2.1 3.2 5.0 7.8 11.4 20.0
01130 Lithium 6.0 54 72 < 6.0 < 6.0 < 6.0 5.9 7.2 9.0 13.8
01145 Selenium 2.4 55 2 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4
22703 Uranium 1.0 43 53 < 1.0 < 1.0 < 1.0 1.0 1.3 2.0 2.3
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 57 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 57 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .005 57 100 0.011 0.013 0.018 0.026 0.037 0.065 0.119
04037 Prometon .018 57 91 < 0.018 < 0.018 0.009 0.012 0.017 0.028 0.070
04040 Desethyl atrazine .002 57 100 0.007 0.010 0.017 0.030 0.050 0.092 0.105
04041 Cyanazine .010 57 7 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.011 0.026
04095 Fonofos .003 57 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 57 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 57 2 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .004 57 9 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.005 0.005
39341 gamma-HCH .004 57 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 57 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 57 100 0.010 0.017 0.033 0.056 0.114 0.328 0.439
39532 Malathion .005 57 4 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.006
39542 Parathion .010 57 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
39572 Diazinon .002 57 49 < 0.002 < 0.002 < 0.002 < 0.002 0.005 0.010 0.019
39632 Atrazine .001 57 100 0.088 0.098 0.213 0.312 0.523 0.781 0.866
46342 Alachlor .008 57 47 < 0.008 < 0.008 < 0.008 < 0.008 0.007 0.037 0.068
49260 Acetochlor .002 57 2 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.015
82630 Metribuzin .004 57 5 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.004 0.006
82660 Diethylanaline .003 57 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 57 5 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.004
82663 Ethalfluralin .004 57 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 57 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 57 5 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 0.007 0.010
82666 Linuron .002 57 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 57 2 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
82668 EPTC .002 57 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82669 Pebulate .004 57 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .020 57 95 < 0.020 < 0.020 0.015 0.021 0.028 0.040 0.065
82671 Molinate .004 57 18 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.021 0.260
82672 Ethoprop .003 57 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 57 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .006 57 7 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.027
82675 Terbufos .013 57 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 57 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 57 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .005 57 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
82679 Propanil .004 57 4 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.027
82680 Carbaryl .006 57 5 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006 0.013
82681 Thiobencarb .002 57 4 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.008
82682 Dachthal (DCPA) .002 57 5 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.002
82683 Pendimethalin .004 57 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .003 57 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 56 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .001 57 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82687 Permethrin .005 57 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 57 100 73.60 84.50 93.30 101.0 109.9 115.9 120.0
91064 Terbuthylazin (%) .100 42 100 95.30 97.93 103.0 111.5 121.0 130.6 136.0
91065 HCH alpha-D6 (%) .100 57 100 65.60 78.20 89.90 97.30 103.4 117.8 130.0
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