Monthly Water Sampling Results for Ten Mile Download in CSV format

Sample Date by pH

Celsius C Fahrenheit F Transparency cm P mg/L N mg/L E. Coli MPN/100mL Ammonia mg/L Flow cfs Atrazine - Screen ppb Membrane Fecal Coliform /100mL Chloride (Lab) mg/L Sulfate mg/L Total Suspended Solids mg/L
10/10/17 13:30 Theresa Shay 7.98 12.2 54.0 60
09/12/17 13:30 Theresa Shay 8.02 19.0 66.2 60+
08/08/17 13:35 Theresa Shay 6.0 20.4 68.7 60+
07/11/17 14:00 Theresa Shay, Sam Boyd 8.04 21.2 70.2 30
06/13/17 13:30 Theresa Shay 4.0 22.0 71.6 50
05/09/17 13:50 Theresa Shay 8.02 13.9 57.0 60+
04/11/17 14:10 Josh Dansdill 8.31 9.5 49.1 60+
10/11/16 13:38 Theresa Shay 8.32 16.1 61.0 60+ 0.33 7.4 31 13.0 13.8 0.8
09/13/16 13:50 Theresa Shay 8.08 16.7 62.0 39 0.51 8.6 1658 13.4 13.3 21
08/09/16 08:00 Theresa Shay 7.81 16.7 62.0 60+ 0.38 11.3 644 15.9 15.2 12
07/12/16 07:30 Theresa Shay 8.33 18.3 65.0 60+ 0.26 9.9 496 18.2 17.0 10.5
06/14/16 12:37 Siepker & Pribyl 8.0 20.0 68.0 60+ 0.38 14.1 556 23.9 17.8 10.3
05/10/16 14:08 Theresa Shay 8.42 12.8 55.0 60+ 0.31 9.6 20 20.0 19.8 3
04/12/16 13:16 Josh Dansdill 8.7 9.9 49.8 60+ 0.28 12.7 <4 18.2 17.1 4
10/06/15 13:45 Theresa Shay 8.18 15.5 59.9 60+ 0.1 2.9 262 13.8 16.2 1.7
09/01/15 07:41 Theresa Shay & Mike Siepker 8.11 16.6 61.9 60+ 0.11 3.9 269 14.7 17.7 4.8
08/04/15 13:45 Theresa Shay 8.41 19.4 66.9 60+ 0.1 4.1 538 12.3 14.6 3.8
07/07/15 14:30 Theresa Shay 8.52 18.3 64.9 42 0.12 7.2 10462 12.4 12.4 1.5
06/02/15 14:10 Theresa Shay 17.2 63.0 60+ 0.09 9.3 330
05/05/15 14:00 Theresa Shay 12.12 53.8 60+ 0.05 7.1 41
04/07/15 13:52 Josh Dansdill 8.9 7.9 46.2 60+ 0.06 6.7 10
10/07/14 13:41 Michael Hoeper 13.8 56.8 60+ 0.19 5.4 290
09/02/14 15:35 Michael Hoeper 8.31 19.7 67.5 60+ 0.23 5.0 6900
08/05/14 13:35 Theresa Shay 8.33 17.1 62.8 60+ 0.11 6.2 570
07/08/14 14:07 Zach Benttine 8.31 21.1 70.0 29 0.16 7.0 3400
06/03/14 13:47 Theresa Shay 8.37 18.3 64.9 60+ 0.07 7.4 730
05/06/14 12:45 Bill Kalishek 8.5 11.11 52.0 60+ 0.06 10.0 10
04/01/14 14:13 Theresa Shay 8.13 3.3 37.9 17 0.32 4.2 300
10/01/13 13:00 Bill Kalishek 9.3 16.6 61.9 60+ 0.07 3.8 10 <0.05
09/03/13 12:40 Theresa Shay 8.73 16.1 61.0 60+ 0.08 5.2 51 <0.05
08/06/13 13:08 Tyler Willey 8.64 19.4 66.9 30 0.16 6.1 24000+ <0.05
07/09/13 00:00 Theresa Shay 20.6 69.1 58 0.1 8.7 1100 <0.05
06/04/13 13:20 Theresa Shay 8.76 9.4 48.9 53 0.11 12.0 460 <0.05
05/07/13 13:30 Theresa Shay 8.35 12.2 54.0 60+ 0.11 15.0 63 <0.05
04/09/13 00:00 Bill Kalishek 7.73 6.6 43.9 60+ 0.13 4.1 460 <0.05
10/02/12 18:06 Theresa Shay 8.02 15.0 59.0 60+ 0.05 0.8 63 <0.05
09/04/12 19:00 22.2 72.0 60+ 0.06 0.86 150 <0.05
08/07/12 18:10 Adam Grim 8.44 22.8 73.0 60+ 0.06 1.2 63 <0.05
07/02/12 18:42 0.1 2.5 250 <0.05
06/05/12 18:10 JJ Moser 19.2 66.6 60+ 0.07 5.2 73 0.18
05/01/12 18:40 0.11 7.8 1800 <0.05
04/03/12 18:40 Theresa Shay 14.8 58.6 60+ 0.1 3.1 10 <0.05
10/04/11 18:00 0.1 2.8 20 <0.05
08/02/11 17:42 60+ 0.08 5.4 800 <0.05
07/05/11 16:50 18.9 66.0 60+ 0.09 6.7 290 <0.05
06/07/11 17:38 21.7 71.0 60+ 0.1 8.7 280 <0.05
05/03/11 12:25 8.6 7.8 46.0 60+ 0.08 9.0 86 <0.05
10/05/10 19:00 Theresa Shay 11.1 52.0 60+ 0.07 7.8 85 <0.05
09/07/10 18:03 JJ Moser 12.2 54.0 60+ 0.09 5.9 440 <0.05
08/03/10 18:10 JJ Moser 8.65 19.4 67.0 60+ 0.11 7.4 300 <0.05
07/06/10 13:25 5.9 48 0.14 8.2 16000 <0.05
06/01/10 17:50 Bill Kalishek 8.4 18.3 65.0 60+ 0.09 6.2 97 <0.05
05/04/10 18:23 JJ Moser 8.56 12.8 55.0 60+ 0.07 5.0 41 <0.05
04/06/10 18:07 Theresa Shay & JJ Moser 8.25 7.8 46.0 60+ 0.07 5.5 63 <0.05
10/06/09 17:50 5.14 10.0 50.0 60+ 0.12 3.0 170 <0.05
09/01/09 18:15 0.1 2.5 120 <0.05
08/04/09 18:50 8.42 17.7 63.9 60+ 0.07 2.3 41 <0.05
07/07/09 17:55 8.4 16.0 60.8 60+ 0.09 3.9 85 <0.05
06/02/09 13:00 8.0 11.1 52.0 60+ 0.04 5.8 120 <0.05
05/05/09 16:50 8.39 11.0 51.8 60+ 0.08 4.4 85 <0.05
04/07/09 18:35 Aaron Schwartzhoff 8.52 6.0 42.8 60+ 0.08 3.7 <10 0.09
10/07/08 18:10 0.07 2.9 90 <0.05 0.07
09/02/08 17:30 8.38 20.0 68.0 60+ 0.1 3.5 40 <0.05 0.09
08/05/08 18:55 8.46 20.0 68.0 60+ 0.1 5.1 20 <0.05 0.1
07/01/08 18:30 6.6 19.4 67.0 60+ 0.09 7.5 830 <0.05 0.23
06/03/08 17:45 8.7 14.4 57.9 60+ 0.06 6.0 410 <0.05 0.09
05/06/08 18:35 Aaron Schwartzhoff 8.55 15.6 60.1 60+ 0.07 6.9 20 0.07 0.05
04/01/08 17:30 Pecinovsky 8.14 5.6 42.1 10 0.42 6.7 1500 0.31 <0.05
10/16/07 17:35 8.44 13.0 55.4 60+ 0.14 7.5 1200 <0.05 0.06
09/04/07 14:05 8.32 16.0 60.8 59 0.11 6.3 520 <0.05 <0.05
08/07/07 17:53 8.31 19.0 66.2 60+ 0.1 3.2 200 <0.05 0.12
07/02/07 17:59 8.37 18.9 66.0 60+ 0.09 6.1 220 <0.05 0.1
06/05/07 13:55 8.3 14.4 57.9 43 0.16 9.0 2100 <0.05 1.1
05/01/07 17:40 8.3 15.5 59.9 60+ 0.07 6.7 <0.05 <0.05
04/03/07 13:37 7.57 6.0 42.8 13 0.32 9.3 9500 <0.05 <0.14
10/03/06 12:25 8.1 15.0 59.0 60+ 0.1 2.4 120 <0.05 0.17
09/05/06 18:15 8.67 20.2 68.4 60+ 0.09 2.7 91 <0.05 0.08
08/01/06 18:18 8.2 23.7 74.7 60+ 0.11 3.3 210 <0.05 0.08
07/05/06 13:40 8.14 16.9 62.4 60+ 0.1 6.3 380 <0.05 0.17
06/06/06 18:10 8.14 20.5 68.9 45 0.17 6.5 350 <0.05 0.24
05/02/06 20:00 8.3 15.0 59.0 46 0.2 13.0 2300 0.08 0.38
04/04/06 19:50 8.0 9.7 49.5 29 0.18 12.0 50 <0.05 0.077
10/04/05 18:30 8.57 21.8 71.2 55 0.11 6.8 200 <0.05 9.84 0.14
09/06/05 17:35 8.55 19.4 66.9 55 0.11 3.1 350 <0.05 0.27
08/02/05 13:40 8.7 23.3 73.9 5 0.12 6.5 3300 <0.05 11.71 0.18
07/05/05 14:00 9.05 23.0 73.4 60+ 0.11 5.2 250 <0.05 0.31
06/07/05 14:45 9.0 9.8 49.6 60+ 0.12 5.5 2000 0.08 3.38 1.3
05/03/05 17:20 8.22 12.8 55.0 60+ 0.08 4.8 <10 <0.05 11.95 0.13
04/06/05 14:40 8.22 12.8 55.0 60+ 0.09 6.2 10 <0.05 0.07
10/26/04 17:20 0.1 4.1 36 <0.05 0.12
09/30/04 18:35 10
09/28/04 17:45 0.1 4.4 <0.05 0.16
08/31/04 19:45 0.09 6.0 <0.05 0.37
07/27/04 13:50 0.1 7.9 380 <0.05 0.38
06/29/04 14:30 0.06 9.1 220 <0.05 0.63
04/27/04 17:25 0.07 3.1 <10 0.05 0.1
05/02/02 16:19 0.06 3.7 <0.05 0.2 10.0
01/30/02 15:10 0.09 3.6 <0.05 0.09 110.0
10/11/00 17:35 0.2 4.0 <0.1 0.2 100.0
  • 10/10/2017: Flows up - started raining.
  • 09/12/2017: Low flow.
  • 08/08/2017: Lots of fish under bridge
  • 07/11/2017: Flows up, water turbid.
  • 05/09/2017: overcast, temps mid 50s. T-storms overnight over UIR, dropping variable amounts of rain (0.10 - 1.33 inches in Dorchester)
  • 04/11/2017: Clear, good baseflow
  • 09/13/2016: flows up
  • 08/09/2016: mostly sunny, humid, morning temp: 63 degrees
  • 07/12/2016: overcast, rain early AM
  • 05/10/2016: green tint to water
  • 04/12/2016: Base flow, Clear
  • 09/02/2014: Heavy dump truck traffic
  • 08/05/2014: water flow good, clear
  • 07/08/2014: Low-Medium flow, slightly turbid
  • 06/03/2014: Awesome!
  • 05/06/2014: Clear and normal water levels
  • 04/01/2014: Up and Muddy
  • 10/01/2013: Low and Clear
  • 06/04/2013: Flows up
  • 05/07/2013: higher flows new channel being cut above bridge
  • 10/02/2012: water backed up by beaver dam below bridge
  • 09/04/2012: Low & Clear; pH Out of Calibration
  • 06/05/2012: pH Not Calibrated
  • 04/03/2012: Low & Clear; pH Out of Calibration
  • 05/03/2011: Slightly high flow
  • 06/01/2010: Normal water level
  • 05/04/2010: Sunny 78 degrees, Breezy
  • 04/07/2009: a little low & very clear
  • 05/06/2008: Moderate to High Flow, Clear
  • 04/01/2008: High, Muddy

Yearly Averages for Ten Mile (with comparison to all sites in the watershed) Download in CSV format

pH

Celsius C Fahrenheit F Transparency cm P mg/L N mg/L E. Coli MPN/100mL Ammonia mg/L Flow cfs Atrazine - Screen ppb Membrane Fecal Coliform /100mL Chloride (Lab) mg/L Sulfate mg/L Total Suspended Solids mg/L
All Years 8.2 (8.2) 15.6 (15.1) 60.1 (59.2) 60+ (60) 0.13 (0.15) 6.1 (5.7) 190 (299) <0.05 (0.07) 9.22 (18.32) 0.22 (0.14) 48 (74) 15.98 (15.85) 15.9 (14.37) 7 (11)
2017 Mean 7.2 (8.1) 16.9 (14.7) 62.4 (58.4) 60+ (59)
2016 Mean 8.2 (8.2) 15.8 (15.1) 60.4 (59.2) 60+ (60+) 0.35 (0.37) 10.5 (7.3) 129 (236) 17.51 (16.26) 16.29 (14.3) 9 (14)
2015 Mean 8.4 (8.4) 15.3 (15.1) 59.5 (59.1) 60+ (60+) 0.09 (0.09) 5.9 (5.8) 245 (197) 13.3 (15.12) 15.23 (14.49) 3 (5)
2014 Mean 8.3 (8.2) 14.9 (13.9) 58.8 (57.0) 58 (48) 0.16 (0.16) 6.5 (6.2) 506 (479)
2013 Mean 8.6 (8.2) 14.4 (13.9) 58.0 (57.0) 60+ (49) 0.11 (0.14) 7.8 (6.3) 299 (437) <0.05 (0.08)
2012 Mean 8.2 (8.3) 18.8 (16.3) 65.8 (61.4) 60+ (60+) 0.08 (0.09) 3.1 (3.7) 110 (230) 0.06 (0.06)
2011 Mean 8.6 (8.4) 16.1 (16.9) 61.0 (62.5) 60+ (60+) 0.09 (0.08) 6.5 (5.5) 162 (214) <0.05 (<0.05)
2010 Mean 8.0 (8.0) 13.6 (13.9) 56.5 (57.0) 60+ (60+) 0.09 (0.1) 6.6 (6.1) 239 (436) <0.05 (<0.05)
2009 Mean 7.8 (8.2) 12.0 (13.4) 53.6 (56.1) 60+ (60+) 0.08 (0.08) 3.7 (4.3) 67 (204) <0.05 (0.05)
2008 Mean 8.1 (8.1) 15.8 (15.0) 60.5 (59.1) 60+ (58) 0.13 (0.12) 5.5 (5.7) 133 (357) 0.08 (0.09) 0.1 (0.09)
2007 Mean 8.2 (8.1) 14.7 (15.4) 58.4 (59.8) 58 (53) 0.14 (0.22) 6.9 (6.2) 905 (745) <0.05 (0.06) 0.22 (0.11)
2006 Mean 8.2 (8.2) 17.3 (16.5) 63.1 (61.7) 58 (56) 0.14 (0.14) 6.6 (5.3) 231 (388) <0.05 (<0.05) 0.17 (0.12)
2005 Mean 8.6 (8.5) 17.6 (16.6) 63.6 (61.9) 58 (55) 0.11 (0.11) 5.4 (5.3) 191 (180) <0.05 (0.11) 9.22 (18.32) 0.34 (0.14)
2004 Mean 0.09 (0.1) 5.8 (5.4) 47 (170) <0.05 (0.05) 0.29 (0.19)
2002 Mean 0.08 (0.21) 3.7 (5.9) <0.05 (0.15) 0.15 (0.09) 33 (32)
2001 Mean (0.14) (12.6) (0.1) (0.54) (934)
2000 Mean 0.2 (0.41) 4.0 (4.8) 0.08 (0.12) 0.2 (0.21) 100 (157)

How to Read the Table

GREEN: Better than average water quality compared to other sites in the watershed

BLACK: Average water quality compared to other sites in the watershed or N/A

RED: Worse than average water quality compared to other sites in the watershed

GRAY: The average value from all sites in the watershed. Useful for comparison.

*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 7.7% 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 48.8% 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).

One-time Rainfall Event Samples for Ten Mile (Not part of above statistics)

Sample Date by pH

Celsius C Fahrenheit F Transparency cm P mg/L N mg/L E. Coli MPN/100mL Ammonia mg/L Flow cfs Atrazine - Screen ppb Membrane Fecal Coliform /100mL Chloride (Lab) mg/L Sulfate mg/L Total Suspended Solids mg/L
03/14/07 13:15 7.62 0.0 32.0 11 0.64 3.0 2600 1.2 0.06
07/25/05 15:10 8.62 22.0 71.6 60+ 0.19 4.6 7500 0.06 0.34
05/25/04 14:30
05/25/04 14:30 0.34 14.0 6400 0.14 2.4
07/29/02 15:30 1.3 3.0 0.26 1.0 120000.0
06/04/02 13:50 0.47 4.1 <0.05 1.1 1000.0
06/15/01 17:20 0.5 8.3 0.3 5.0 110000.0
04/03/01 16:21 0.5 6.5 0.1 0.15 160.0
08/17/00 15:20 0.2 4.7 <0.1 0.26 700.0
07/05/00 17:40 0.1 7.2 0.1 0.52 430.0
05/18/00 20:30 0.1 3.0 0.2 1.1 2700.0
02/24/00 13:50 1.5 3.0 1.1 0.76 4500.0

Site Information

NameTen Mile
Code12-TEN-10
CountyWinneshiek
Latitude43.333
Longitude-91.8526
UTM_X593018.0
UTM_Y4798430.0
Sampled byIowa DNR Fisheries ~ Decorah Hatchery

Sampling Location

Nearby Sampling Locations

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