Monthly Water Sampling Results for Upper Iowa River at Mouth 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 Atrazine - Screen ppb Membrane Fecal Coliform /100mL Chloride (Lab) mg/L Sulfate mg/L Total Suspended Solids mg/L
05/09/17 11:20 Kevin Hanson 8.37 13.9 57.0 15
04/11/17 10:29 Ross Evelsizer 8.32 8.2 46.8 53
10/12/16 12:10 0.32 5.8 173 12.2 13.8 12
10/11/16 12:10 Kevin Hanson 8.4 13.9 57.0 49
09/13/16 12:00 Kevin Hanson 8.47 17.0 62.6 9 0.83 7.0 759 12.7 12.2 95.7
08/09/16 09:31 Sindelar - Guttenberg 8.57 21.1 70.0 23 0.43 5.8 399 12.5 12.7 31.5
07/12/16 10:33 R. Sindelar 7.84 24.1 75.4 50 0.3 4.7 84 13.7 14.7 18.7
06/14/16 10:45 Kevin Hanson 8.39 21.3 70.3 17 0.32 7.7 185 16.8 14.7 65.5
06/07/16 11:30 8.13 19.8 67.6 36
05/10/16 12:30 Kevin Hanson 8.55 14.6 58.3 54 0.26 6.2 146 16.5 14.6 6.5
04/12/16 10:15 Ross Evelsizer 8.51 7.5 45.5 53 0.28 8.7 <4 15.7 14.9 27.8
10/06/15 11:10 Kevin Hanson 8.76 13.5 56.3 60+ 0.04 3.2 146 12.3 16.5 4.3
09/01/15 12:10 Kevin Hanson 8.84 25.4 77.7 56 0.05 3.6 144 12.6 5.2 9
08/04/15 10:41 Josh Dansdill 8.5 22.9 73.2 42 0.11 5.6 52 12.5 14.9 22
07/07/15 11:50 Kevin Hanson 8.52 19.6 67.3 19 0.12 7.3 228 13.7 14.7 11.5
06/03/15 10:50 Kevin Hanson 8.46 19.8 67.6 33 0.09 8.0 41
05/05/15 12:00 Kevin Hanson 8.83 17.0 62.6 51 0.06 5.3 20
04/07/15 11:30 Kevin Hanson 8.27 9.6 49.3 47 0.15 6.3 10
10/07/14 11:30 Kevin Hanson 8.64 11.7 53.1 23 0.11 5.0 85
09/02/14 11:45 Kevin Hanson 8.27 21.3 70.3 22 0.14 4.4 84
08/05/14 10:25 Kevin Hanson 8.35 21.1 70.0 27 0.12 3.7 370
07/08/14 11:02 Kevin Hanson 8.36 20.0 68.0 17 0.14 9.8 1300
06/03/14 11:45 Kevin Hanson 8.3 20.9 69.6 19 0.14 4.5 1000
05/06/14 10:30 Kevin Hanson 8.49 12.1 53.8 36 0.1 9.7 63
04/01/14 09:55 Bill Kalishek 8.0 5.0 41.0 5 0.8 2.3 52
10/01/13 11:10 Kevin Hanson 8.4 16.6 61.9 59 0.03 3.4 52 <0.05
09/03/13 12:00 Kevin Hanson 8.59 18.6 65.5 41 0.1 4.2 74 <0.05
08/06/13 10:45 Kevin Hanson 8.42 18.9 66.0 29 0.08 4.6 220 <0.05
07/09/13 00:00 Kevin Hanson 8.18 21.3 70.3 2 0.75 5.5 24000+ 0.08
06/04/13 00:00 Adam Grim & Crystal Krapfl 8.0 14.4 57.9 3 0.44 7.9 930 0.28
05/07/13 00:00 Kevin Hanson 8.97 13.9 57.0 9 0.3 15.0 840 <0.05
04/09/13 00:00 Josh Dansdill 8.1 8.0 46.4 22 0.22 2.6 31 0.16
10/02/12 16:45 Kevin Hanson 8.41 15.3 59.5 60+ 0.02 1.8 31 <0.05
09/04/12 16:00 Kevin Hanson 8.27 21.9 71.4 7 0.27 1.2 9200 <0.05
08/07/12 15:05 Kevin Hanson 8.47 23.6 74.5 22 0.09 1.0 170 <0.05
07/02/12 15:54 0.08 2.3 200 0.09
06/05/12 14:56 Dan Weber 8.41 20.8 69.4 60+ 0.06 3.6 <10 <0.05
05/01/12 16:40 Kevin Hanson 8.62 13.0 55.4 37 0.08 4.7 52 <0.05
04/03/12 16:45 Kevin Hanson 7.9 16.2 61.2 32 0.11 2.4 <10 <0.05
10/04/11 16:00 0.05 3.2 20 <0.05
09/06/11 15:05 Nikki Schlitter 8.66 16.3 61.3 55 0.07 3.4 130 <0.05
08/02/11 17:15 Kevin Hanson 8.8 26.8 80.2 41 0.05 4.1 130 <0.05
07/05/11 15:59 Kevin Hanson 8.6 23.3 73.9 27 0.08 5.6 190 <0.05
06/07/11 16:42 Kevin Hanson 8.7 24.0 75.2 30 0.09 7.0 280 <0.05
05/03/11 18:50 8.5 10.0 50.0 52 0.08 7.7 10 <0.05
10/05/10 15:15 8.5 11.8 53.2 53 0.08 7.0 170 <0.05
09/06/10 17:21 Aaron Schwartzhoff 8.7 15.7 60.3 36 0.14 4.6 2100 <0.05
08/03/10 16:02 Aaron Schwartzhoff 8.2 22.3 72.1 30 0.15 7.0 240 <0.05
07/06/10 16:16 Kevin Hanson 8 0.47 6.8 16000 0.06
06/01/10 14:15 Aaron Schwartzhoff 45 0.06 4.2 52 <0.05
05/04/10 16:00 Kevin Hanson 44 0.06 4.5 <10 <0.05
04/06/10 16:00 Aaron Schwartzhoff 11.9 53.5 56 0.06 5.0 110 <0.05
10/06/09 15:10 8.41 10.9 51.6 60+ 0.09 2.8 17000 <0.05
09/01/09 15:30 0.07 2.9 150 <0.05
08/04/09 15:30 8.33 22.3 72.1 44 0.07 2.6 110 <0.05
07/08/09 14:45 8.31 19.5 67.1 48 0.17 4.2 810 <0.05
06/02/09 15:32 8.24 18.4 65.1 37 0.1 7.2 120 <0.05
05/05/09 15:20 8.32 17.2 63.0 39 0.09 4.5 31 <0.05
04/07/09 14:55 8.44 5.9 42.6 60+ 0.04 3.6 <10 <0.05
10/07/08 16:50 0.05 3.6 180 <0.05
09/02/08 15:40 8.44 22.7 72.9 45 0.08 4.0 80 <0.05
08/05/08 14:40 8.3 21.0 69.8 38 0.09 4.7 270 <0.05
07/01/08 15:00 8.14 21.4 70.5 45 0.1 5.8 1400 <0.05
06/03/08 15:30 8.48 18.3 64.9 42 0.08 8.2 130 <0.05
05/06/08 15:40 Scott Gritters 8.25 16.1 61.0 50 0.11 6.7 60 <0.05
04/01/08 17:55 Aaron Schwartzhoff 6.1 43.0 11 0.25 5.3 300 <0.05
10/16/07 16:15 8.43 14.9 58.8 32 0.12 7.1 2100 0.08
09/04/07 16:00 8.22 19.4 66.9 19 0.16 5.8 910 <0.05
08/07/07 15:14 8.35 24.7 76.5 21 0.09 3.4 390 <0.05
07/02/07 16:35 8.43 23.4 74.1 50 0.09 5.9 30 <0.05
06/05/07 15:15 8.25 19.0 66.2 11 0.29 9.3 4900 <0.05
05/01/07 15:15 8.38 16.6 61.9 56 0.06 6.0 <0.05
04/03/07 14:50 7.96 9.2 48.6 8 0.33 7.9 4900 <0.05
10/03/06 15:25 8.3 13.8 56.8 58 0.04 2.2 140 <0.05
09/05/06 15:15 37.5 0.07 3.0 360 <0.05
08/01/06 16:15 23 0.11 2.0 140 <0.05
07/05/06 16:49 8.6 24.9 76.8 32 0.1 4.9 120 <0.05
06/06/06 16:15 8.41 22.6 72.7 36 0.09 4.2 1600 <0.05
05/02/06 15:00 8.51 12.9 55.2 18 0.18 7.2 7200 <0.05
04/04/06 15:52 3 0.36 9.3 2600 0.13
10/04/05 14:11 8.6 20.6 69.1 43 0.14 7.3 150 0.11
09/06/05 17:00 8.58 22.3 72.1 17 0.06 3.0 50 <0.05
08/02/05 15:30 8.47 24.7 76.5 21 0.23 6.4 510 <0.05
07/05/05 17:30 8.31 26.3 79.3 55 0.13 6.5 64 <0.05
06/07/05 17:30 8.4 10.0 50.0 55 0.09 3.9 10 <0.05
05/03/05 15:36 8.39 16.4 61.5 27 0.07 5.3 <10 <0.05
04/06/05 19:45 8.39 16.4 61.5 27 0.16 5.2 30 1.1
10/26/04 16:00 0.04 4.0 40 <0.05
09/28/04 16:00 0.09 5.4 110 <0.05
08/31/04 16:00 0.14 4.4 430 <0.05
07/27/04 15:00 0.13 6.6 200 <0.05
06/30/04 16:20 0.08 7.2 110 <0.05
04/27/04 15:00 0.06 1.4 10 <0.05
05/02/02 15:15 0.2 7.4 <0.05 0.19 220.0
01/30/02 18:00 <0.05 3.4 <0.05 <0.05 27.0
10/11/00 17:55 0.2 3.3 <0.1 0.09 <10.0
  • 05/09/2017: overcast, temps mid 50s. T-storms overnight over UIR, dropping variable amounts of rain (0.10 - 1.33 inches in Dorchester)
  • 09/13/2016: river high, swift current
  • 08/04/2015: Sunny
  • 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: Muddy & Flowing Fast
  • 07/09/2013: Rain overnight / morning
  • 06/04/2013: Raining
  • 05/07/2013: Several feet high and muddy
  • 09/06/2011: 2 in of rain over the weekend
  • 08/02/2011: Helicopter Spraying Fields Upstream of Site
  • 05/03/2011: High flow, turbid
  • 10/05/2010: Mississippi above flood stage
  • 09/06/2010: Slightly high
  • 08/03/2010: up and turbid
  • 06/01/2010: Normal Flow
  • 04/01/2008: Water Level High, Muddy, Recent Rain

Yearly Averages for Upper Iowa River at Mouth (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 Atrazine - Screen ppb Membrane Fecal Coliform /100mL Chloride (Lab) mg/L Sulfate mg/L Total Suspended Solids mg/L
All Years 8.4 (8.2) 17.4 (15.0) 63.3 (59.0) 35 (60) 0.16 (0.15) 5.2 (5.7) 163 (299) 0.06 (0.07) 0.11 (0.14) 36 (74) 13.75 (15.85) 13.54 (14.37) 28 (11)
2017 Mean 8.3 (8.2) 11.1 (10.0) 51.9 (50.0) 34 (60+)
2016 Mean 8.4 (8.2) 17.4 (15.1) 63.3 (59.2) 36 (60+) 0.39 (0.37) 6.6 (7.3) 121 (236) 14.3 (16.26) 13.94 (14.3) 37 (14)
2015 Mean 8.6 (8.4) 18.3 (15.1) 64.9 (59.1) 46 (60+) 0.09 (0.09) 5.6 (5.8) 57 (197) 12.78 (15.12) 12.83 (14.49) 12 (5)
2014 Mean 8.3 (8.2) 16.0 (13.9) 60.8 (57.0) 21 (48) 0.22 (0.16) 5.6 (6.2) 196 (479)
2013 Mean 8.4 (8.2) 16.0 (13.9) 60.7 (57.0) 24 (49) 0.27 (0.14) 6.2 (6.3) 346 (437) 0.1 (0.08)
2012 Mean 8.3 (8.3) 18.5 (16.3) 65.2 (61.4) 40 (60+) 0.1 (0.09) 2.4 (3.7) 85 (230) <0.05 (0.06)
2011 Mean 8.7 (8.4) 20.1 (16.9) 68.1 (62.5) 41 (60+) 0.07 (0.08) 5.2 (5.5) 75 (214) <0.05 (<0.05)
2010 Mean 8.5 (8.0) 15.4 (13.9) 59.8 (57.0) 39 (60+) 0.15 (0.1) 5.6 (6.1) 251 (436) <0.05 (<0.05)
2009 Mean 8.3 (8.2) 15.7 (13.4) 60.3 (56.1) 52 (60+) 0.09 (0.08) 4.0 (4.3) 183 (204) <0.05 (0.05)
2008 Mean 8.3 (8.1) 17.6 (15.0) 63.7 (59.1) 39 (58) 0.11 (0.12) 5.5 (5.7) 200 (357) <0.05 (0.09) (0.09)
2007 Mean 8.3 (8.1) 18.2 (15.4) 64.7 (59.8) 28 (53) 0.16 (0.22) 6.5 (6.2) 902 (745) <0.05 (0.06) (0.11)
2006 Mean 8.5 (8.2) 18.6 (16.5) 65.4 (61.7) 30 (56) 0.14 (0.14) 4.7 (5.3) 592 (388) 0.05 (<0.05) (0.12)
2005 Mean 8.4 (8.5) 19.5 (16.6) 67.1 (61.9) 35 (55) 0.13 (0.11) 5.4 (5.3) 48 (180) 0.2 (0.11) (0.14)
2004 Mean 0.09 (0.1) 4.8 (5.4) 86 (170) <0.05 (0.05) (0.19)
2002 Mean 0.12 (0.21) 5.4 (5.9) <0.05 (0.15) 0.12 (0.09) 77 (32)
2001 Mean (0.14) (12.6) (0.1) (0.54) (934)
2000 Mean 0.2 (0.41) 3.3 (4.8) 0.08 (0.12) 0.09 (0.21) <10 (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 1.1% 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 33.0% 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 Upper Iowa River at Mouth (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 Atrazine - Screen ppb Membrane Fecal Coliform /100mL Chloride (Lab) mg/L Sulfate mg/L Total Suspended Solids mg/L
03/14/07 14:45 2 1.8 2.1 4800 1.1
07/25/05 16:30 8.58 23.5 74.3 46 0.22 3.2 1800 <0.05
05/25/04 15:30
05/25/04 15:30 0.57 11.0 920 0.1
07/29/02 15:55 0.31 2.0 <0.05 0.15 820.0
06/04/02 16:30 0.48 2.4 <0.05 0.98 20000.0
06/15/01 14:55 <0.1 6.1 <0.1 0.69 5500.0
04/03/01 15:16 0.4 7.4 <0.1 0.08 40.0
08/17/00 16:30 0.1 3.7 <0.1 0.31 6400.0
07/05/00 17:40 0.2 6.4 <0.1 0.37 1000.0
05/18/00 20:45 0.6 2.0 0.3 2.8 92000.0
02/24/00 16:35 0.6 2.6 1.2 0.05 4300.0

Site Information

NameUpper Iowa River at Mouth
Code30-UIR-10
CountyAllamakee
Latitude43.4745
Longitude-91.2949
UTM_X637908.0
UTM_Y4814920.0
Sampled byIowa DNR Fisheries ~ Guttenberg Hatchery

Sampling Location

Nearby Sampling Locations

Downstream →