LCRA Logo   Colorado River Watch Network (CRWN) Water Quality Data

  • Site 111
  • Onion Creek above Upper McKinney Falls
  • Hydromet Rainfall
  • Hydromet Flow
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    Date Time Air Temp (C) Water Temp (C) Flow pH Nitrates-N (mg/L) DO Avg (mg/L) DO % Sat Cond (µS/cm) Days Since Rain Field Rain Gauge (in.) Secchi (M) Transparency (M) E.coli (cfu's)
    09/26/2023 17:15 34 30 2 < 1 6.75 87.75 630 1 0.18 0.918
    01/29/2020 17:05 13 15 3 8.29 < 1 9.75 97.5 470 1 0.7 0.66
    04/21/2015 17:23 27 24 3 7.86 < 1 6.05 71.39 560 3 0.57 > 1.22
    10/27/2008 17:05 18.5 17 3 8.33 < 1 9.2 95.68 630 12 0 > 1.22
    09/06/2008 18:07 23 20.5 2 7.5 < 1 8.05 89.36 530 18 0
    08/16/2008 13:30 33 30.5 2 7.5 < 1 7.05 92.36 550 46 0.03
    07/06/2008 13:50 32.5 29.5 2 7.5 < 1 6.3 81.27 740 8 0
    04/19/2008 14:25 27 22 3 8 < 1 6.2 70.68 480 2 1.3
    03/15/2008 12:15 27.5 21.5 3 7.5 < 1 7.45 84.19 520 5 0
    01/30/2008 09:15 7 11 3 7.5 < 1 9.8 90.16 650 9 0
    11/19/2007 16:45 24 20 1 7.5 < 1 7.9 86.9 640 2 0.3
    10/14/2007 09:45 1 7.5 < 1 5.3 610 7 0
    09/05/2007 13:45 3 8 < 1 6.45 530 1 0.21
    07/21/2007 12:45 28.5 25 4 7.5 < 1 5.95 71.4 360 0 1.5
    06/09/2007 13:05 30.5 28.5 5 8 < 1 6 76.2 520 5 0
    04/19/2007 16:55 25 23 3 7 < 1 8.9 103.24 2 > .8 > 0.8
    02/22/2007 16:43 24 18.5 3 8.3 1 720 0 0 > 1.22 > 1.22
    01/28/2007 14:00 11 13 3 7.5 < 1 9.15 87.84 650 5 0
    12/02/2006 14:40 14 13 3 7.5 < 1 4.9 370 3 1
    08/05/2006 09:15 28.5 28.5 No Flow 7 < 1 3.3 41.91 740 1 0.25
    09/29/2005 18:30 230 27 Low 7 < 1 8.3 102.92 490 10 0
    07/30/2005 11:30 24 29 Low 7.2 < 1 6 76.8 450 3 0.5
    05/31/2005 18:00 27 26.5 No Flow 7.6 < 1 6 73.8 340 1 1.5
    04/30/2005 19:45 18 22 Low 7 < 1 9.2 104.88 470 13 0.01 > 1.5
    03/13/2005 12:15 31.5 19.5 Normal 7 < 1 6.7 73.03 530 7 0
    02/13/2005 17:00 24 17 Normal 7 < 1 10.1 105.04 520 3 0.07
    01/23/2005 13:50 9 11 Low 7 < 1 9.7 89.24 600 8 0
    12/12/2004 16:00 23.5 16 Normal 7 < 1 9.6 97.92 620 7 0
    11/28/2004 10:00 16 15.5 7 < 1 7.9 79.79 600
    10/16/2004 14:00 28.5 23 No Flow 7.1 < 1 6.8 78.88 570 3 0.27
    09/08/2004 16:45 28.5 27.5 No Flow 7 < 1 7 87.5 640 10 0
    07/31/2004 14:00 33 29 No Flow 7 < 1 5.6 71.68 450 2 1.5
    05/31/2004 15:40 33 31 No Flow 7 < 1 7.5 99 780 15 0
    04/30/2004 13:00 26 24 No Flow 7.8 5.8 68.44 590 7 0
    03/28/2004 10:30 24 21 Low 8.1 8.15 91.28 580 6 0
    10/18/2002 11:00 20 19 Normal 7 < 1 8.7 93.96 590 4 0 > .7
    09/25/2002 10:45 24 23 Normal 7.3 < 1 7.5 87 560 6 0 > .7
    08/12/2002 10:00 28 28 Normal 7.6 < 1 6.1 75.6 570 4 0.01 .7
    04/18/2002 08:45 23.5 24.5 Low 7.4 < 1 3.9 45.6 660 2 0.01 .7
    10/09/2001 10:30 25 21 Normal 7.3 < 1 8.5 93.5 670 10 0
    09/11/2001 09:45 24 24 Normal 8 < 1 6.2 71.9 440 2 0.6 .75
    08/01/2001 10:10 30 29 Low 7.6 < 1 7.3 92 780 39 0 .6
    06/25/2001 09:15 25 26.5 Normal 7.4 < 1 6.9 83.5 620 2 1.1 .75
    05/24/2001 10:45 28 24 Normal 7.7 < 1 7.6 88.2 620 17 0 .75
    04/18/2001 08:45 12 17 Normal 7.6 < 1 4.4 44.9 710 1 0.2 .8
    03/14/2001 11:00 9 14 Normal 8 < 1 9.4 90.2 510 0 0.01 1
    01/22/2001 09:10 5 7 High 8.1 < 1 11.3 92.7 580 4 0 1
    12/20/2000 10:50 13 8 Normal 7.6 < 1 10.7 89.9 8 0 24
    11/15/2000 10:10 7 11 Normal 7.8 < 2 9.9 88.7 4 0.01 < .76
    10/12/2000 10:15 20 16 Low 7.8 < 1 8.5 85 4 0 < .3
    09/01/2000 09:30 30 29 Low 8.1 < 1 6.8 85.7 40 0 < .4
    07/27/2000 09:30 28 28 Low 7.8 < 1 6.3 78.1 4 0 < .46
    06/24/2000 09:25 27 27 7.7 < 1 8.1 98.8 5 0 < .49
    05/16/2000 08:35 21 24 7.6 < 1 4.5 52.2 3 0.4 .23
    04/18/2000 08:45 21 23 Low 7.8 < 1 8.4 95.8 4 0 < .46
    03/13/2000 09:25 16 16 Low 7.7 < 1 7.2 72 4 .49
    02/12/2000 09:10 9 15 Low 7.8 < 1 11.6 113.7 9 0 < .46
    01/15/2000 09:25 13 13 Normal 7.8 10.2 95.9 3 0 < .49
    12/20/1999 09:00 8 11 Low 7.9 < 1 10.1 90.9 2 0.75 .46
    11/10/1999 10:15 19 18 Low 7.8 7.3 75.9 11 0
    10/28/1999 10:15 21 18 Low 8 < 1 9.8 101.9 88 0
    10/06/1999 10:30 22 22 Low 7.8 < 1 7.6 85.1 66 0
    09/17/1999 10:00 25 24 Low 7.8 < 1 8.3 96.3 47 0
    09/17/1999 12:00
    09/01/1999 10:00 27 27 7.9 8.8 107.4 31 0
    08/12/1999 10:00 29 30 Normal 7.7 < 1 6.6 84.5 11 0
    07/28/1999 09:45 28.5 29 Normal 7.5 < 1 6.6 83.2 10 0
    07/15/1999 10:00 26.5 27 Normal 7.6 8.1 98.8 1 2
    07/08/1999 11:00
    06/17/1999 09:55 24 26 Normal 7.5 < 1 4.3 51.6 1 3
    05/26/1999 09:30 25 27 High 7.8 < 5 4.9 59.8 2 3
    05/26/1999 09:15 22 25 Normal 7.6 < 1 5.2 61.4 2 0.25
    05/10/1999 10:15 23 23 Normal 8 7.2 82.1 0 0.8
    04/22/1999 09:30 23 22 Normal 7.9 < 1 6.5 72.8 0
    04/07/1999 10:10 24 20 Normal 7.8 1 8.2 88.6 2 0.1
    03/22/1999 10:10 21 18 Normal 7.8 < 1 7.4 77 3 0
    03/07/1999 09:50 15 18.5 Normal 8 10.1 106.1 2 0.02
    02/18/1998 10:00 14 12.5 8.7 < 1 10.75 103 2 1
    01/02/1998 10:00 15 14.5 7.8 < 1 10.25 99 0 1
    01/02/1998 09:30 15 14.5 7.8 < 1 10 98 0 1
    12/24/1997 09:45 15 13 7.8 < 1 11.1 105 1 2.5
    12/09/1997 10:40 16.5 13.5 7.8 < 1 5.25 51 1 0.1
    06/25/1997 10:30 27.7 27.9 8 < 1 6.35 76 1 0.2
    06/14/1997 09:40 28 28.4 7.9 < 1 6.45 100 1 0.1
    05/31/1997 11:06 30 26 7.8 < 1 1.1 10 11 0
    04/20/1997 10:15 22 18.7 7.6 < 1 6.35 84 1 0.15
    03/16/1997 10:20 13.5 14.5 7.8 < 1 7.95 77 0 0.1
    03/01/1997 10:54 23 15 7.9 < 1 9.3 92 1 0.01
    02/22/1997 10:40 13 13 7.9 < 1 9.7 91 0
    02/08/1997 10:55 8 13 7.8 < 0.5 11 90 1
    01/18/1997 13:00 16 8.5 7.8 < 1 13.1 110 4 0
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