Clear Creek [28-CLE-10]

NameClear Creek
Code28-CLE-10
CountyAllamakee
Latitude43.4389
Longitude-91.4115
Sampled byIowa DNR Fisheries ~ Guttenberg Hatchery

Sampling Location

Yearly Averages for Clear Creek [28-CLE-10] Download in CSV format
(with comparison to all locations in the watershed)

pH

 Celsius C Fahrenheit F Transparency cm P mg/L N mg/L E. Coli MPN/100mL Ammonia mg/L Flow cfs Atrazine ppb Fecal Coliform /100mL Chloride mg/L Sulfate mg/L Total Suspended Solids mg/L
All Years 8.3 (8.2) 15.1 (14.9) 59.3 (58.9) 44 (60+) 0.09 (0.12) 2.0 (5.6) 1411 (272) 0.07 (0.07) 6.74 (18.32) <0.05 (0.14) 793 (13321) 6.02 (14.45) 10.3 (14.65) 22 (19)
2022 Mean 7.8 (7.9) 16.8 (15.9) 62.2 (60.7) 41 (60+) 0.06 (0.09) 2.5 (6.1) 692 (250) 6.14 (14.69) 11.19 (15.44) 21 (14)
2021 Mean 8.0 (8.1) 15.1 (15.5) 59.1 (59.8) 44 (60+) 0.06 (0.06) 2.5 (4.5) 960 (166) 6.21 (13.83) 10.66 (16.38) 24 (7)
2020 Mean 8.2 (8.1) 13.4 (13.0) 56.1 (55.5) 54 (60+) 0.03 (0.06) 2.3 (5.2) 324 (121) 5.89 (13.01) 10.6 (14.7) 13 (10)
2019 Mean 8.1 (7.9) 14.0 (13.9) 57.2 (57.0) 48 (60+) 0.09 (0.11) 2.3 (5.6) 770 (189) 5.4 (12.79) 10.21 (13.72) 15 (10)
2018 Mean 8.3 (8.2) 14.3 (14.1) 57.7 (57.4) 23 (43) 0.15 (0.26) 2.1 (6.1) 1045 (391) 5.91 (14.8) 10.39 (13.58) 39 (72)
2017 Mean 8.2 (8.1) 14.3 (14.7) 57.7 (58.4) 30 (59) 0.1 (0.12) 1.9 (5.7) 1372 (359) 7.0 (15.39) 10.11 (14.51) 27 (15)
2016 Mean 8.2 (8.2) 14.7 (15.1) 58.5 (59.2) 37 (60+) 0.09 (0.12) 1.8 (7.3) 1551 (236) 5.67 (16.26) 9.99 (14.3) 24 (14)
2015 Mean 8.5 (8.4) 15.8 (15.1) 60.4 (59.1) 50 (60+) 0.07 (0.09) 1.9 (5.8) 2185 (197) 5.88 (15.12) 8.45 (14.49) 6 (5)
2014 Mean 8.4 (8.2) 14.4 (13.9) 57.9 (57.0) 45 (48) 0.08 (0.16) 2.0 (6.2) 585 (479)
2013 Mean 8.4 (8.2) 13.8 (13.9) 56.8 (57.0) 27 (49) 0.34 (0.14) 1.9 (6.3) 3083 (437) 0.21 (0.08)
2012 Mean 8.4 (8.3) 15.3 (16.3) 59.5 (61.4) 60+ (60+) 0.07 (0.09) 2.3 (3.7) 1498 (230) 0.1 (0.06)
2011 Mean 8.7 (8.4) 17.5 (16.9) 63.5 (62.5) 37 (60+) 0.09 (0.08) 1.9 (5.5) 3742 (214) 0.05 (<0.05)
2010 Mean 8.4 (8.0) 14.2 (13.9) 57.6 (57.0) 59 (60+) 0.07 (0.1) 1.7 (6.1) 1838 (436) 0.06 (<0.05)
2009 Mean 8.3 (8.2) 13.6 (13.4) 56.5 (56.1) 53 (60+) 0.08 (0.08) 1.7 (4.3) 2017 (204) 0.07 (0.05)
2008 Mean 8.3 (8.1) 16.4 (15.0) 61.4 (59.1) 41 (58) 0.06 (0.12) 2.0 (5.7) 1339 (357) 0.06 (0.09) (0.09)
2007 Mean 8.3 (8.1) 15.7 (15.4) 60.2 (59.8) 50 (53) 0.09 (0.22) 1.9 (6.2) 2302 (745) 0.06 (0.06) (0.11)
2006 Mean 8.5 (8.2) 16.8 (16.5) 62.2 (61.7) 50 (56) 0.08 (0.14) 1.6 (5.3) 3572 (388) <0.05 (<0.05) (0.12)
2005 Mean 8.5 (8.5) 17.7 (16.6) 63.9 (61.9) 42 (55) 0.07 (0.11) 1.7 (5.3) 1634 (180) <0.05 (0.11) 6.74 (18.32) (0.14)
2004 Mean 0.07 (0.1) 1.8 (5.4) 1473 (170) <0.05 (0.05) (0.19)
2002 Mean 0.06 (0.21) 1.7 (5.9) <0.05 (0.15) <0.05 (0.09) 795 (11159)
2001 Mean (0.14) (12.6) (0.1) (0.54) (10137)
2000 Mean 0.2 (0.41) 1.8 (4.8) 0.08 (0.12) <0.05 (0.21) 790 (18412)

*All averages are arithmetic means, except for E. Coli and/or Fecal Coliform, which are calculated as geometric means. For purposes of calculating a mean, values that exceed the measurement limit (e.g., <0.05, 60+, <33) are assumed to be 20% greater or less than their limit (e.g., 0.04, 72, 26.4).

Water Quality Standards

For 0.0% of the data records, Nitrate+Nitrite exceeded 10 mg/L. 10 mg/L represents the U.S. Public Health Service recommended limit of 10 mg/L NO3-N (nitrate-nitrogen) in drinking water.

For 87.8% of the data records, E. coli bacteria exceeded 235 CFU/100 ml. 235 CFU/100 ml represents Iowa's single sample maximum water quality standard for primary contact recreational use (Class A1), secondary contact recreational use (Class A2), and children's recreational use (A3).

Download in CSV format

Monthly Water Sampling Data for Clear Creek [28-CLE-10]

Sample Date Time by pH

 Celsius C Fahrenheit F Transparency cm P mg/L N mg/L E. Coli MPN/100mL Ammonia mg/L Flow cfs Atrazine ppb Fecal Coliform /100mL Chloride mg/L Sulfate mg/L Total Suspended Solids mg/L
10/11/22 12:50 Kevin Hanson 8.3 13.0 55.4 59 0.04 2.4 309 5.0 9.8 64
09/13/22 12:30 Kevin Hanson 7.8 14.1 57.4 38 0.05 2.3 789 5.1 8.9 13.2
08/09/22 11:40 Kevin Hanson 6.86 17.3 63.1 60+ 0.07 2.4 228 6.7 10.4 2
07/12/22 12:00 19.1 66.4 31 0.07 2.6 1178 6.4 11.1 4
06/14/22 14:05 Kevin Hanson 22.0 71.6 16 0.11 2.5 813 6.6 10.8 40.8
05/10/22 12:35 Kevin Hanson 8.41 15.0 59.0 19 0.05 2.4 1576 6.3 16.2 4.8
04/12/22 09:00 Ross Evelsizer 51 0.06 2.7 909 6.9 11.1 15.2
10/12/21 13:00 Kevin Hanson 13.6 56.5 42 0.05 2.6 1565 6.1 10.6 11.6
09/14/21 12:10 Kevin Hanson 8.23 14.6 58.3 60+ 0.05 2.6 794 6.6 10.2 4.8
08/10/21 11:30 Kevin Hanson 7.85 17.4 63.3 21 0.07 2.3 4352 5.9 10.4 44.9
07/13/21 12:15 Kevin Hanson 7.8 19.5 67.1 30 0.07 2.3 727 6.5 11.2 4.8
06/08/21 11:08 Kevin Hanson 8.21 19.5 67.1 16 0.06 2.4 4884 6.0 10.6 70
05/11/21 12:25 Kevin Hanson 8.14 13.1 55.6 58 0.03 2.4 110 5.8 10.5 9.2
04/13/21 10:10 Josh Dansdill 7.8 46.0 60+ 0.06 2.6 355 6.6 11.1 21.6
10/13/20 13:40 Kevin Hanson 8.65 12.5 54.5 58 0.02 2.4 717 6.8 10.3 7.6
09/08/20 12:35 Kevin Hanson 8.33 11.2 52.2 56 0.02 2.5 960 5.7 10.9 4.4
08/11/20 13:00 Denver Link 8.34 16.4 61.5 60+ 0.02 2.4 288 5.6 10.7 7.2
07/14/20 11:15 Denver Link 7.55 16.7 62.1 39 0.07 2.3 3654 5.5 10.6 23.6
06/09/20 00:00 Denver Link 7.81 15.9 60.6 47 0.03 2.1 836 6.1 10.2 23.2
05/12/20 12:50 Kevin Hanson 8.28 13.2 55.8 0.03 2.2 20 5.9 10.5 15.6
04/14/20 12:30 Kevin Hanson 8.26 7.7 45.9 54 0.03 2.4 31 5.6 11.0 7.5
10/08/19 12:05 Kevin Hanson 8.41 11.5 52.7 58 0.09 2.3 203 5.3 10.3 20
09/10/19 10:34 Josh Dansdill 13.3 56.0 52 0.11 2.3 24196+ 5.3 10.7 16.8
08/13/19 10:30 Dakota 7.81 14.5 58.1 57 0.07 2.3 880 5.3 8.7 12.8
07/09/19 12:15 7.95 16.3 61.3 10 0.08 2.1 4884 5.3 10.2 13.5
06/11/19 12:00 Kevin Hanson 8.05 13.55 56.4 41 0.09 2.2 594 5.8 10.5 6
05/14/19 11:30 Karen Osterkamp 8.3 14.9 58.8 60+ 2.3 98 5.9 10.8 13
04/09/19 00:00 0.09 2.3 109 4.9 10.3 24.4
10/09/18 11:19 Tori Nimrod 8.63 13.0 55.4 8.5 0.4 2.1 8664 5.7 9.4 146
09/11/18 12:30 Theresa Shay & Kevin Hanson 8.14 15.1 59.2 27 0.1 2.3 908 6.3 11.3 23.2
08/14/18 11:10 Kevin Hanson 8.22 16.3 61.3 26 0.1 2.0 1785 5.4 10.3 23.6
07/10/18 11:20 Kevin Hanson 8.34 17.5 63.5 22 0.14 2.0 657 6.1 10.7 31.5
06/12/18 12:30 Kevin Hanson 8.24 15.0 59.0 27 0.11 2.1 2359 5.3 10.3 23.5
05/08/18 11:50 Kevin Hanson 8.3 15.0 59.0 19 0.11 2.1 644 6.8 10.7 2.5
04/17/18 12:35 Kevin Hanson 8.0 46.4 34 0.1 2.4 97 5.8 10.0 24
10/10/17 12:05 8.11 11.7 53.1 37 0.11 2.0 1178 5.4 10.8 17.2
09/12/17 11:25 Karen Osterkamp 8.35 16.1 61.0 38 0.1 2.2 4611 5.9 10.9 28.4
08/08/17 11:45 Kevin Hanson 8.25 16.2 61.2 34 0.08 2.1 1187 5.4 10.2 16
07/11/17 00:00 Guttenberg AIS 8.18 17.2 63.0 21 0.11 2.0 1539 5.6 10.0 35.5
06/13/17 11:40 Kevin Hanson 8.11 18.6 65.5 29 0.09 2.2 1354 17.0 10.7 12.4
05/09/17 11:45 Kevin Hanson 8.18 12.4 54.3 18 0.1 1.6 1467 4.8 8.3 29.6
04/11/17 10:52 Ross Evelsizer 8.21 7.8 46.0 31 0.1 1.5 464 4.9 9.9 53.2
10/11/16 12:30 Kevin Hanson 8.28 13.9 57.0 38 0.08 1.7 359 5.1 9.7 14.8
09/13/16 12:20 Kevin Hanson 8.2 14.4 57.9 15 0.15 2.2 1607 6.1 10.7 61.5
08/09/16 09:55 Sindelar - Guttenberg 8.22 16.2 61.2 32 0.1 1.9 5172 5.5 10.1 19.8
07/12/16 11:00 R. Sindelar 7.91 18.9 66.0 52 0.03 1.7 1246 5.3 9.5 10.8
06/14/16 11:10 Kevin Hanson 8.18 16.7 62.1 22 0.1 1.7 1872 5.8 9.9 34.5
06/07/16 12:15 8.05 16.6 61.9 28
05/10/16 12:50 Kevin Hanson 8.24 13.3 55.9 55 0.09 1.9 2382 5.9 9.9 7.3
04/12/16 10:47 Ross Evelsizer 8.44 7.8 46.0 50 0.07 1.7 1302 6.0 10.1 16.8
10/06/15 11:25 Kevin Hanson 8.47 12.4 54.3 60+ 0.05 2.2 132 5.5 10.5 4.2
09/01/15 12:30 Kevin Hanson 8.92 21.2 70.2 53 0.08 1.8 7270 5.5 3.2 13
08/04/15 11:00 Josh Dansdill 8.4 18.8 65.8 60+ 0.08 2.1 3873 6.5 10.2 6.8
07/07/15 12:30 Kevin Hanson 8.36 16.5 61.7 38 0.08 2.3 990 6.0 9.9 1.3
06/03/15 11:45 Kevin Hanson 8.47 17.6 63.7 34 0.08 1.8 9800
05/05/15 12:20 Kevin Hanson 8.41 14.7 58.5 27 0.08 1.5 5500
04/07/15 11:50 Kevin Hanson 8.28 9.2 48.6 56 0.07 1.9 1200
10/07/14 12:00 Kevin Hanson 8.25 12.1 53.8 58 0.06 2.0 240
09/02/14 12:10 Kevin Hanson 8.25 17.3 63.1 45 0.09 1.9 4400
08/05/14 10:45 Kevin Hanson 8.29 15.7 60.3 38 0.09 1.8 1900
07/08/14 11:20 Kevin Hanson 8.59 18.9 66.0 44 0.05 1.9 2600
06/03/14 12:00 Kevin Hanson 8.65 18.1 64.6 37 0.09 2.0 910
05/06/14 10:55 Kevin Hanson 8.7 12.6 54.7 58 0.05 2.0 31
04/01/14 10:25 Bill Kalishek 8.3 6.1 43.0 38 0.1 2.3 160
10/01/13 11:45 Kevin Hanson 8.46 13.8 56.8 60 0.04 2.2 1100 <0.05
09/03/13 12:30 Kevin Hanson 8.61 15.2 59.4 31 0.06 2.3 2100 <0.05
08/06/13 11:10 Kevin Hanson 8.36 16.4 61.5 23 0.08 2.1 1600 0.12
07/09/13 00:00 Kevin Hanson 17.5 63.5 1 0.94 1.4 24000+ 0.24
06/04/13 00:00 Adam Grim & Crystal Krapfl 8.1 12.3 54.1 18 0.12 2.3 2400 0.06
05/07/13 00:00 Kevin Hanson 8.59 14.1 57.4 55 0.05 1.7 360 <0.05
04/09/13 00:00 Josh Dansdill 8.07 7.0 44.6 3 1.1 1.4 24000+ 0.9
10/02/12 17:15 Kevin Hanson 8.39 13.4 56.1 42 0.05 2.0 1600 <0.05
09/04/12 16:20 Kevin Hanson 8.27 17.9 64.2 60+ 0.07 1.9 2700 <0.05
08/07/12 14:35 Kevin Hanson 8.21 16.6 61.9 58 0.06 1.8 1800 <0.05
07/02/12 16:17 0.12 5.1 110000 0.45
06/05/12 15:27 Dan Weber 8.42 14.6 58.3 60+ 0.06 1.6 1200 <0.05
05/01/12 16:55 Kevin Hanson 8.46 13.0 55.4 60+ 0.08 1.7 97 <0.05
04/03/12 17:15 Kevin Hanson 8.4 16.1 61.0 58 0.05 1.8 170 <0.05
10/04/11 16:15 0.06 2.1 710 <0.05
09/06/11 16:05 Nikki Schlitter 9.13 13.4 56.1 60+ 0.05 2.0 300 <0.05
08/02/11 17:35 Kevin Hanson 8.6 21.3 70.3 19 0.12 1.8 12000 0.09
07/05/11 16:56 Kevin Hanson 8.8 20.5 68.9 19 0.13 1.7 110000 <0.05
06/07/11 17:21 Kevin Hanson 8.6 21.1 70.0 19 0.14 1.7 6100 0.05
05/03/11 18:30 8.6 11.1 52.0 55 0.05 1.9 1600 <0.05
10/05/10 15:35 8.6 11.8 53.2 59 0.04 2.1 520 <0.05
09/06/10 17:43 Aaron Schwartzhoff 8.5 13.2 55.8 60+ 0.05 1.9 1800 <0.05
08/03/10 16:26 Aaron Schwartzhoff 8.2 17.6 63.7 47 0.07 1.8 4100 <0.05
07/06/10 16:35 Kevin Hanson 17 0.2 1.5 13000 0.18
06/01/10 14:40 Aaron Schwartzhoff 60+ 0.04 1.5 1100 <0.05
05/04/10 16:15 Kevin Hanson 60+ 0.04 1.6 860 <0.05
04/06/10 16:45 Aaron Schwartzhoff 60+ 0.04 1.7 1500 <0.05
10/06/09 15:40 8.21 10.6 51.1 32 0.17 1.7 24000+ 0.23
09/01/09 16:00 0.06 1.7 640 <0.05
08/04/09 16:15 8.22 18.0 64.4 45 0.08 1.7 1300 <0.05
07/08/09 15:15 8.18 14.8 58.6 60+ 0.05 1.6 11000 <0.05
06/02/09 16:10 8.46 16.7 62.1 60+ 0.03 1.6 440 <0.05
05/05/09 16:35 8.38 14.8 58.6 22 0.09 1.8 13000 <0.05
04/07/09 15:25 8.34 6.6 43.9 60+ 0.05 2.0 90 <0.05
10/07/08 17:10 0.03 1.8 820 <0.05
09/02/08 16:15 8.75 20.1 68.2 40 0.07 2.1 2400 <0.05
08/05/08 15:10 8.12 17.8 64.0 41 0.08 2.2 2100 0.08
07/01/08 15:45 8.13 19.9 67.8 33 0.06 2.0 760 <0.05
06/03/08 16:13 8.3 17.3 63.1 54 0.04 2.1 17000 <0.05
05/06/08 16:30 Scott Gritters 8.1 15.3 59.5 35 0.1 2.2 850 0.09
04/01/08 18:16 Aaron Schwartzhoff 7.8 46.0 45 0.06 1.9 170 0.09
10/16/07 16:30 8.3 14.5 58.1 56 0.06 2.2 1300 <0.05
09/04/07 16:15 8.18 17.8 64.0 28 0.08 2.1 2100 <0.05
08/07/07 15:51 8.36 18.4 65.1 60+ 0.06 1.8 2000 <0.05
07/02/07 17:20 8.48 19.7 67.5 60+ 0.09 1.9 4900 <0.05
06/05/07 15:30 8.3 15.5 59.9 39 0.08 1.8 5600 <0.05
05/01/07 15:30 8.41 14.6 58.3 58 0.05 1.6 440 0.09
04/03/07 15:15 7.93 9.3 48.7 26 0.22 1.8 5200 0.12
10/03/06 15:45 8.37 13.8 56.8 40 0.07 1.6 2400 <0.05
09/05/06 15:40 50 0.06 1.8 7000 <0.05
08/01/06 16:45 33 0.12 1.6 13000 <0.05
07/05/06 17:07 8.71 21.5 70.7 51 0.07 1.5 5500 <0.05
06/06/06 16:30 8.36 18.0 64.4 44 0.12 1.1 33000 <0.05
05/02/06 15:30 8.57 13.9 57.0 60+ 0.06 1.9 1100 <0.05
04/04/06 16:11 59 0.07 1.6 170 <0.05
10/04/05 14:35 8.3 17.3 63.1 50 0.06 1.8 5400 0.1 7.09
09/06/05 17:30 8.5 20.5 68.9 48 0.07 1.6 780 <0.05
08/02/05 15:45 7.92 20.7 69.3 2 0.08 1.7 3300 <0.05 6.49
07/05/05 18:00 8.56 23.2 73.8 47 0.09 1.7 5400 <0.05
06/07/05 18:10 8.75 9.7 49.5 50 0.08 1.5 2300 <0.05 6.46
05/03/05 16:22 8.65 16.3 61.3 47 0.04 1.8 410 <0.05 6.91
04/06/05 19:25 8.65 16.3 61.3 47 0.09 1.7 440 <0.05
10/26/04 16:30 0.1 1.9 2700 <0.05
09/28/04 16:50 0.05 1.8 1200 0.05
08/31/04 16:30 0.07 1.8 4100 <0.05
07/27/04 15:45 0.06 1.8 1700 <0.05
06/30/04 17:00 0.07 1.7 870 <0.05
04/27/04 15:40 0.07 1.5 520 <0.05
05/02/02 15:30 0.07 1.4 <0.05 <0.05 1500.0
01/30/02 18:15 <0.05 1.9 <0.05 <0.05 90.0
10/11/00 17:33 0.2 1.8 <0.1 <0.05 790.0
  • 06/14/2022: pH Meter Not Calibrated
  • 05/14/2019: Time approximate
  • 04/09/2019: Field sheet missing
  • 09/12/2017: Total P bottle spilled. About one half of sample left.
  • 05/09/2017: overcast, temps mid 50s. T-storms overnight over UIR, dropping variable amounts of rain (0.10 - 1.33 inches in Dorchester)
  • 06/07/2016: Farmer spraying roundup in adjacent field
  • 08/04/2015: Low & clear
  • 06/03/2015: Data from 6/3/2015 (Regular Sampling date was 6/2/2015. No rain event occurred overnight.)
  • 05/06/2014: ph meter may not be working properly
  • 04/01/2014: Clear & Low
  • 05/07/2013: Low and Clear
  • 09/04/2012: Beaver dam formed below bridge site
  • 05/03/2011: Clear - normal flow
  • 09/06/2010: Slightly high, crystal clear
  • 08/03/2010: a little high
  • 06/01/2010: Normal Flow
  • 04/01/2008: Water Slightly High, Pretty Clear, Horses & Cattle, Recent Rain

One-time Rainfall Event Samples for Clear Creek (Not part of above statistics)

Sample Date Time by pH

 Celsius C Fahrenheit F Transparency cm P mg/L N mg/L E. Coli MPN/100mL Ammonia mg/L Flow cfs Atrazine ppb Fecal Coliform /100mL Chloride mg/L Sulfate mg/L Total Suspended Solids mg/L
03/14/07 15:15 12 0.4 1.3 770 0.7
07/25/05 16:50 8.61 20.0 68.0 60+ 0.1 1.7 5300 0.06
05/25/04 16:30
05/25/04 16:30 0.13 1.9 1500 0.08
07/29/02 16:10 0.05 1.3 <0.05 <0.05 15000.0
06/04/02 17:07 0.9 1.2 0.32 1.3 140000.0
06/15/01 15:17 0.1 1.9 <0.1 3.5 25000.0
04/03/01 15:40 <0.1 1.6 <0.1 <0.05 82.0
08/17/00 17:00 <0.1 1.4 0.1 0.06 17000.0
07/05/00 18:10 0.1 1.6 <0.1 0.08 3000.0
05/18/00 21:10 0.8 1.2 0.4 3.0 180000.0
02/24/00 17:40 0.3 1.4 0.4 <0.05 560.0

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