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 1,827 682 1,050 2,120 2,850 4,030 9,750 15,000 Cubic meters per second 1,827 19 30 60 81 114 276 425
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) 26 12.5 13.0 17.5 21.8 28.0 29.0 29.0 00076 Turbidity (NTU) 26 1.9 2.0 2.7 4.4 6.2 10.0 14.0 00095 Conductance (uS/cm) 26 1050.0 1060.0 1200.0 1270.0 1380.0 1590.0 1770.0 00300 Dissolved oxygen 26 6.5 6.7 7.2 8.1 8.9 10.0 10.2 00400 pH (standard units) 26 7.7 7.9 8.1 8.1 8.2 8.3 8.3 00452 CO3 (filtered) 26 0.0 0.0 0.0 0.0 0.0 0.0 1.0 00453 HCO3 (filtered) 26 171.0 172.0 183.0 191.0 203.0 215.0 234.0 39086 Alk (filtered, as CaCO3) 26 140.0 141.0 150.0 156.5 166.0 176.0 192.0 70331 % finer than 62 microns 24 6.7 14.1 28.1 45.6 78.6 94.6 95.0 80154 Suspended sediment 25 9.0 12.0 30.0 54.0 82.0 162.0 398.0
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 26 92 < 0.020 < 0.020 0.059 0.082 0.104 0.144 0.190
00613 NO2-N .010 26 69 < 0.010 < 0.010 < 0.010 0.011 0.015 0.030 0.050
00623 Org+NH3-N (filtered) .200 26 85 < 0.200 < 0.200 0.200 0.215 0.265 0.300 0.308
00625 Org+NH3-N (whole-water) .200 26 88 < 0.200 < 0.200 0.246 0.272 0.321 0.400 0.402
00631 NO2+NO3-N .050 25 100 0.217 0.230 0.317 0.361 0.442 0.487 0.650
00665 Total P (whole-water) .050 26 77 < 0.050 < 0.050 0.030 0.047 0.050 0.236 0.282
00666 Total P (filtered) .050 26 38 < 0.050 < 0.050 < 0.050 < 0.050 0.033 0.050 0.050
00671 PO4-P .010 26 77 < 0.010 < 0.010 0.003 0.008 0.010 0.015 0.020
00681 DOC .300 24 100 2.400 2.400 2.500 2.596 2.700 2.800 2.814
00689 SOC .200 24 83 < 0.200 < 0.200 0.210 0.300 0.400 0.500 1.400
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 26 100 72.71 75.12 80.82 84.97 88.07 94.67 100.0
00925 Magnesium .010 26 100 26.67 27.23 29.00 30.42 31.73 36.00 37.00
00930 Sodium .200 26 100 94.22 97.53 115.6 130.9 148.6 180.0 200.0
00935 Potassium .010 26 100 3.930 4.060 4.150 4.525 4.870 5.100 5.500
00940 Chloride .010 26 100 87.93 92.13 117.7 125.6 146.9 170.0 210.0
00945 Sulfate .010 26 100 250.6 251.4 273.3 292.1 311.7 370.0 380.0
00950 Fluoride .100 26 100 0.339 0.344 0.380 0.419 0.500 0.504 0.600
00955 Silica .010 26 100 8.324 8.781 9.944 10.38 11.74 14.00 14.00
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 26 100 2.0 2.0 2.0 2.3 3.0 3.4 4.0
01005 Barium 1.0 22 100 82.0 84.3 90.5 96.0 102.0 110.0 111.0
01010 Beryllium 1.0 22 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01020 Boron 16.0 22 100 120.1 127.1 158.4 166.4 187.1 200.6 268.0
01025 Cadmium 8.0 22 0 < 8.0 < 8.0 < 8.0 < 8.0 < 8.0 < 8.0 < 8.0
01030 Chromium 14.0 22 45 < 14.0 < 14.0 < 14.0 < 14.0 5.0 7.5 14.0
01035 Cobalt 12.0 22 0 < 12.0 < 12.0 < 12.0 < 12.0 < 12.0 < 12.0 < 12.0
01040 Copper 10.0 22 55 < 10.0 < 10.0 < 10.0 1.3 2.0 10.0 10.0
01046 Iron 10.0 26 12 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 10.0 18.6
01049 Lead 1.0 21 0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0
01056 Manganese 4.0 22 95 < 4.0 3.1 4.4 7.0 12.0 28.0 32.0
01060 Molybdenum 10.0 21 81 < 10.0 < 10.0 5.9 6.4 7.1 10.0 10.0
01065 Nickel 40.0 22 77 < 40.0 < 40.0 1.1 1.7 2.5 10.0 40.0
01075 Silver 4.0 22 0 < 4.0 < 4.0 < 4.0 < 4.0 < 4.0 < 4.0 < 4.0
01080 Strontium 0.5 26 100 985.1 1027 1089 1148 1200 1400 1400
01085 Vanadium 10.0 26 0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0 < 10.0
01090 Zinc 20.0 22 82 < 20.0 < 20.0 1.4 2.6 5.0 16.0 20.0
01095 Antimony 1.0 21 14 < 1.0 < 1.0 < 1.0 < 1.0 < 1.0 1.0 1.1
01106 Aluminum 10.0 22 64 < 10.0 < 10.0 < 10.0 2.8 8.8 10.0 20.0
01130 Lithium 4.0 26 100 42.4 43.2 50.0 54.9 59.0 72.0 74.0
01145 Selenium 2.4 26 96 < 2.4 1.2 1.7 2.0 2.2 3.0 3.0
22703 Uranium 1.0 17 100 3.3 3.3 3.8 4.0 4.1 5.0 5.0
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 23 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
04028 Butylate .002 23 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
04035 Simazine .005 23 30 < 0.005 < 0.005 < 0.005 < 0.005 0.005 0.005 0.006
04037 Prometon .018 23 30 < 0.018 < 0.018 < 0.018 < 0.018 0.018 0.018 0.018
04040 Desethyl atrazine .002 23 17 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003 0.003
04041 Cyanazine .004 23 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
04095 Fonofos .003 23 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
34253 alpha-HCH .002 23 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
34653 p,p DDE .006 23 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
38933 Chlorpyrifos .004 23 4 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 0.005
39341 gamma-HCH .004 23 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39381 Dieldrin .001 23 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
39415 Metolachlor .002 23 13 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.002 0.004
39532 Malathion .005 23 9 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 0.006 0.015
39542 Parathion .004 23 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
39572 Diazinon .005 23 48 < 0.005 < 0.005 < 0.005 < 0.005 0.005 0.006 0.007
39632 Atrazine .001 23 70 < 0.001 < 0.001 < 0.001 0.003 0.005 0.006 0.006
46342 Alachlor .010 23 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
49260 Acetochlor .002 23 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82630 Metribuzin .025 23 17 < 0.025 < 0.025 < 0.025 < 0.025 < 0.025 0.026 0.026
82660 Diethylanaline .003 23 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82661 Trifluralin .002 23 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82663 Ethalfluralin .004 23 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82664 Phorate .002 23 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82665 Terbacil .007 23 0 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007 < 0.007
82666 Linuron .002 23 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82667 Methyl parathion .006 23 0 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006 < 0.006
82668 EPTC .006 23 48 < 0.006 < 0.006 < 0.006 < 0.006 0.005 0.039 0.066
82669 Pebulate .004 23 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82670 Tebuthiuron .050 23 0 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050 < 0.050
82671 Molinate .004 23 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82672 Ethoprop .003 23 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82673 Benfluralin .002 23 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82674 Carbofuran .003 23 9 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.016 0.026
82675 Terbufos .013 23 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82676 Pronamide .003 23 4 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 0.005
82677 Disulfoton .017 23 0 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017 < 0.017
82678 Triallate .001 23 0 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001
82679 Propanil .004 23 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82680 Carbaryl .003 23 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82681 Thiobencarb .002 23 0 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002
82682 Dachthal (DCPA) .002 23 17 < 0.002 < 0.002 < 0.002 < 0.002 < 0.002 0.003 0.006
82683 Pendimethalin .004 23 0 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004 < 0.004
82684 Napropamide .003 23 0 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003 < 0.003
82685 Propargite .013 23 0 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013 < 0.013
82686 Azinphos methyl .010 23 0 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010 < 0.010
82687 Permethrin .005 23 0 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005
91063 Diazinon-d10 (%) .100 23 100 78.78 79.47 91.42 102.0 106.7 121.1 127.8
91064 Terbuthylazin (%) .100 14 100 77.23 77.23 100.5 111.7 115.0 120.0 120.0
91065 HCH alpha-D6 (%) .100 23 100 76.18 76.83 80.40 94.55 99.00 101.9 102.8
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 20 100 0.40 0.45 0.70 1.25 2.85 19.40 29.00
29818 Arsenic (ppm) 0.10 20 100 4.40 4.50 5.30 7.00 9.20 13.50 15.00
29820 Barium (ppm) 1.00 20 100 160.0 170.0 420.0 475.0 530.0 595.0 610.0
29822 Beryllium (ppm) 0.10 20 100 0.60 0.65 0.90 0.95 1.15 1.60 1.70
29826 Cadmium (ppm) 0.10 20 80 < 0.10 < 0.10 0.10 0.15 0.40 0.75 1.00
29829 Chromium (ppm) 1.00 20 100 36.00 36.50 52.00 63.00 70.50 83.50 84.00
29832 Copper (ppm) 1.00 20 100 8.00 8.50 12.50 14.50 20.00 34.50 37.00
29836 Lead (ppm) 1.00 20 100 8.00 8.00 13.00 17.00 20.50 35.50 39.00
29839 Manganese (ppm) 10.0 20 100 490.0 510.0 675.0 1200 1700 3250 3600
29841 Mercury (ppm) 0.01 18 78 < 0.01 < 0.01 0.02 0.04 0.05 0.26 0.26
29843 Molybdenum (ppm) 5.00 19 21 < 5.00 < 5.00 < 5.00 < 6.00 < 10.00 25.00 25.00
29845 Nickel (ppm) 1.00 20 100 20.00 22.00 30.00 36.50 44.00 54.50 56.00
29847 Selenium (ppm) 0.10 20 100 0.30 0.35 0.55 0.80 1.25 2.00 2.20
29850 Silver (ppm) 0.50 20 0 < 0.50 < 0.50 < 0.50 < 0.50 < 1.00 < 3.75 < 5.00
29853 Vanadium (ppm) 1.00 20 100 25.00 31.00 42.50 53.00 57.50 68.50 70.00
29855 Zinc (ppm) 1.00 20 100 40.00 40.00 50.00 60.00 70.00 115.0 130.0
30221 Aluminum (%) 0.10 20 100 2.00 2.70 3.55 4.00 4.40 5.00 5.10
30244 Total carbon (%) 0.10 13 100 0.90 0.90 1.60 2.00 3.10 3.90 3.90
30269 Iron (%) 0.10 20 100 1.10 1.30 1.60 1.95 2.20 2.70 2.70
30292 Phosphorus (%) 0.01 20 100 0.04 0.04 0.05 0.07 0.08 0.10 0.10
30308 Sulfur (%) 0.10 11 100 0.70 0.70 0.80 1.00 2.10 3.10 3.10
30317 Titanium (%) 0.01 20 100 0.11 0.16 0.25 0.29 0.30 0.35 0.36
35031 Cobalt (ppm) 1.00 20 100 3.00 4.50 6.00 8.00 9.00 11.00 11.00
35040 Strontium (ppm) 0.01 20 100 310.0 310.0 370.0 460.0 550.0 800.0 910.0
35046 Uranium (ppm) 50.0 19 0 < 50.00 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 250.0
35050 Lithium (ppm) 1.00 20 100 21.00 22.00 24.50 29.00 38.50 51.00 54.00
49955 Thallium (ppm) 50.0 19 0 < 50.00 < 50.00 < 50.00 < 50.00 < 100.0 < 250.0 250.0
50279 Sediment (mg/L) 1.00 20 100 10.00 15.00 31.50 47.50 80.00 223.5 265.0
50465 Organic carbon (%) 0.10 13 100 0.40 0.40 0.70 1.20 1.60 2.20 2.20
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