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 55,000 72,000 118,000 193,000 312,000 436,000 637,000 Cubic meters per second 1,827 1,557 2,039 3,341 5,465 8,835 12,346 18,038
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) 74 3.5 7.5 13.0 19.3 27.5 30.5 32.5 00076 Turbidity (NTU) 73 5.8 13.0 30.0 45.0 65.0 120.0 260.0 00095 Conductance (uS/cm) 73 176.0 248.0 315.0 363.0 453.0 553.0 669.0 00300 Dissolved oxygen 74 5.7 6.1 7.1 7.9 9.7 11.5 13.0 00400 pH (standard units) 75 7.2 7.2 7.6 7.8 8.0 8.2 8.3 00452 CO3 (filtered) 52 0.0 0.0 0.0 0.0 0.0 0.0 0.0 00453 HCO3 (filtered) 54 48.0 67.0 89.0 109.5 133.0 168.0 174.0 39086 Alk (filtered, as CaCO3) 56 40.0 55.0 73.0 91.5 110.5 138.0 143.0 70331 % finer than 62 microns 71 35.8 45.0 73.0 93.0 97.6 99.2 99.8 80154 Suspended sediment 71 18.0 24.0 81.0 157.0 245.0 381.0 420.0
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 59 < 0.020 < 0.020 < 0.020 0.022 0.034 0.066 0.370
00613 NO2-N .010 74 51 < 0.010 < 0.010 < 0.010 0.010 0.018 0.028 0.030
00623 Org+NH3-N (filtered) .200 72 90 < 0.200 < 0.200 0.244 0.297 0.325 0.420 0.487
00625 Org+NH3-N (whole-water) .200 73 99 < 0.200 0.299 0.472 0.562 0.686 0.820 0.895
00631 NO2+NO3-N .050 73 100 0.328 0.577 0.751 1.030 1.470 2.237 2.623
00665 Total P (whole-water) .010 73 100 0.058 0.080 0.134 0.169 0.240 0.300 0.326
00666 Total P (filtered) .020 73 97 < 0.020 0.022 0.043 0.060 0.072 0.106 0.122
00671 PO4-P .010 70 100 0.001 0.030 0.041 0.056 0.075 0.100 0.113
00681 DOC .300 67 100 2.200 3.400 3.900 4.400 5.100 6.993 8.813
00689 SOC .200 70 100 0.300 0.600 1.100 1.739 2.400 4.400 6.200
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 14.61 21.58 27.73 34.57 40.00 46.37 49.19
00925 Magnesium .010 73 100 4.392 6.499 7.980 10.82 13.00 16.45 18.00
00930 Sodium .200 74 100 11.00 12.00 15.41 19.64 27.00 39.39 44.28
00935 Potassium .010 74 100 2.170 2.410 2.710 3.185 3.510 3.900 4.160
00940 Chloride .010 72 100 12.42 14.00 18.19 22.48 29.60 38.53 49.87
00945 Sulfate .010 71 100 19.68 24.79 34.00 42.97 57.23 77.00 94.17
00950 Fluoride .100 72 92 < 0.100 < 0.100 0.122 0.165 0.200 0.242 0.300
00955 Silica .010 74 100 1.263 4.291 5.700 6.164 6.787 7.805 8.787
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 75 64 < 2.0 < 2.0 < 2.0 1.2 2.0 2.1 2.9
01005 Barium 0.2 50 98 < 0.2 43.8 51.5 58.7 67.2 77.0 83.7
01010 Beryllium 10.0 54 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01020 Boron 16.0 70 100 20.6 25.8 33.2 40.1 54.2 71.6 118.8
01025 Cadmium 1.0 54 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01030 Chromium 1.0 49 41 < 1.0 < 1.0 < 1.0 < 1.0 1.4 2.8 3.8
01035 Cobalt 3.0 50 0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0 < 3.0
01040 Copper 1.0 54 94 < 1.0 < 1.0 1.6 1.8 2.0 3.0 5.0
01046 Iron 10.0 74 66 < 10.0 < 10.0 < 10.0 11.1 32.1 67.5 124.2
01049 Lead 1.0 54 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 1.0 49 63 < 1.0 < 1.0 < 1.0 1.2 4.3 18.8 76.0
01060 Molybdenum 10.0 50 72 < 10.0 < 10.0 < 10.0 1.4 2.0 3.1 10.0
01065 Nickel 1.0 54 93 < 1.0 < 1.0 1.4 1.6 2.0 3.0 4.0
01075 Silver 1.0 50 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01080 Strontium 0.5 71 100 98.4 122.8 148.2 175.9 220.0 280.6 292.2
01085 Vanadium 10.0 75 4 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0
01090 Zinc 10.0 54 76 < 10.0 < 10.0 1.0 1.7 3.8 10.6 13.0
01095 Antimony 1.0 49 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01106 Aluminum 0.3 49 98 < 0.3 2.0 3.0 4.0 6.1 20.0 42.7
01130 Lithium 6.0 71 85 < 6.0 < 6.0 5.0 5.6 8.1 13.7 17.0
01145 Selenium 2.4 75 8 < 2.4 < 2.4 < 2.4 < 2.4 < 2.4 2.4 2.4
22703 Uranium 1.0 49 47 < 1.0 < 1.0 < 1.0 < 1.0 1.2 2.0 2.0
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 .050 73 1 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 0.050
04028 Butylate .050 73 4 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 0.050
04035 Simazine .010 74 99 < 0.010 0.012 0.016 0.027 0.057 0.191 0.248
04037 Prometon .050 74 76 < 0.050 < 0.050 0.007 0.010 0.017 0.050 0.050
04040 Desethyl atrazine .050 74 99 < 0.050 0.011 0.020 0.042 0.079 0.193 0.425
04041 Cyanazine .200 74 95 < 0.200 < 0.200 0.018 0.038 0.107 0.462 0.940
04095 Fonofos .003 70 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 70 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 70 4 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
38933 Chlorpyrifos .004 70 9 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.008 0.010
39341 gamma-HCH .004 70 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 70 4 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 0.010
39415 Metolachlor .050 74 99 < 0.050 0.027 0.046 0.157 0.427 1.200 1.950
39532 Malathion .010 70 19 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 0.014 0.037
39542 Parathion .004 70 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .002 70 49 < 0.002 < 0.002 < 0.002 < 0.002 0.005 0.008 0.024
39632 Atrazine .001 74 100 0.032 0.058 0.117 0.329 1.040 2.130 4.100
46342 Alachlor .050 74 69 < 0.050 < 0.050 < 0.050 0.010 0.027 0.052 0.104
49260 Acetochlor .050 73 68 < 0.050 < 0.050 < 0.050 0.015 0.059 0.317 0.500
82630 Metribuzin .050 74 43 < 0.050 < 0.050 < 0.050 < 0.050 0.020 0.050 0.073
82660 Diethylanaline .003 70 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 70 30 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.005 0.014
82663 Ethalfluralin .004 70 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 70 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 70 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .002 70 3 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.005
82667 Methyl parathion .006 70 4 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 0.006
82668 EPTC .002 70 4 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.006
82669 Pebulate .004 70 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .020 70 84 < 0.020 < 0.020 0.009 0.010 0.012 0.018 0.020
82671 Molinate .004 70 30 < 0.004 < 0.004 < 0.004 < 0.004 0.005 0.054 0.109
82672 Ethoprop .003 70 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 70 1 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.004
82674 Carbofuran .020 70 36 < 0.020 < 0.020 < 0.020 < 0.020 0.009 0.036 0.055
82675 Terbufos .013 70 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 70 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82677 Disulfoton .017 70 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 70 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82679 Propanil .004 70 3 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.009
82680 Carbaryl .003 70 7 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.005 0.049
82681 Thiobencarb .002 70 4 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.008
82682 Dachthal (DCPA) .002 69 1 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002
82683 Pendimethalin .008 70 10 < 0.008 < 0.008 < 0.008 < 0.008 < 0.008 0.008 0.011
82684 Napropamide .003 70 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 69 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .001 70 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82687 Permethrin .005 70 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 70 100 71.50 80.19 90.99 101.0 108.0 116.4 120.0
91064 Terbuthylazin (%) .100 51 100 91.90 94.19 104.3 108.8 117.2 129.6 140.0
91065 HCH alpha-D6 (%) .100 70 100 70.20 82.52 92.08 97.06 101.6 112.0 119.1
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 50 100 0.50 0.60 0.80 1.00 1.50 7.20 27.30
29818 Arsenic (ppm) 0.10 50 100 5.30 6.40 8.40 10.95 12.30 15.70 16.00
29820 Barium (ppm) 1.00 50 100 270.0 480.0 530.0 570.0 610.0 630.0 640.0
29822 Beryllium (ppm) 0.10 50 100 1.00 1.10 1.50 1.60 1.70 2.00 2.10
29826 Cadmium (ppm) 0.10 50 94 < 0.10 < 0.10 0.30 0.40 0.50 1.00 1.30
29829 Chromium (ppm) 1.00 50 98 < 1.00 45.00 57.00 63.50 69.00 78.00 260.0
29832 Copper (ppm) 1.00 50 100 9.00 12.00 16.00 22.00 25.00 32.00 38.00
29836 Lead (ppm) 1.00 50 100 11.00 17.00 20.00 22.50 26.00 45.00 74.00
29839 Manganese (ppm) 10.0 50 100 380.0 530.0 860.0 1100 1600 2200 3100
29841 Mercury (ppm) 0.01 47 94 < 0.01 < 0.01 0.03 0.05 0.06 0.12 1.10
29843 Molybdenum (ppm) 5.00 50 6 < 2.00 < 5.00 < 5.00 < 5.00 < 25.00 25.00 25.00
29845 Nickel (ppm) 1.00 50 98 < 1.00 26.00 34.00 37.00 43.00 59.00 68.00
29847 Selenium (ppm) 0.10 50 100 0.20 0.30 0.40 0.65 0.80 1.40 1.60
29850 Silver (ppm) 0.50 50 2 < 0.50 < 0.50 < 0.50 < 0.50 < 2.50 < 2.50 2.50
29853 Vanadium (ppm) 1.00 50 100 43.00 56.00 74.00 88.00 100.0 110.0 120.0
29855 Zinc (ppm) 1.00 50 100 50.00 70.00 90.00 110.0 130.0 160.0 210.0
30221 Aluminum (%) 0.10 50 100 4.00 4.60 5.40 6.00 6.40 7.10 7.50
30244 Total carbon (%) 0.10 49 98 < 0.10 0.80 1.20 1.90 2.30 3.30 4.00
30269 Iron (%) 0.10 50 100 1.50 2.00 2.50 2.95 3.30 3.70 3.90
30292 Phosphorus (%) 0.01 50 100 0.05 0.05 0.08 0.10 0.12 0.14 0.14
30308 Sulfur (%) 0.10 45 89 < 0.10 < 0.10 0.10 0.20 0.50 1.20 1.40
30317 Titanium (%) 0.01 50 100 0.20 0.20 0.30 0.31 0.38 0.40 0.40
35031 Cobalt (ppm) 1.00 50 100 7.00 8.00 11.00 13.00 14.00 15.00 16.00
35040 Strontium (ppm) 0.01 50 100 110.0 110.0 130.0 140.0 160.0 290.0 350.0
35046 Uranium (ppm) 50.0 50 0 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0 < 250.0
35050 Lithium (ppm) 1.00 50 100 19.00 23.00 33.00 38.50 42.00 47.00 48.00
49955 Thallium (ppm) 50.0 50 0 < 50.00 < 50.00 < 50.00 < 50.00 < 250.0 < 250.0 < 250.0
50279 Sediment (mg/L) 1.00 50 100 18.00 26.00 73.00 159.5 243.0 398.0 455.0
50465 Organic carbon (%) 0.10 46 96 < 0.10 0.10 1.10 1.40 1.90 2.20 3.10
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