Monthly Water Sampling Results for Trout Run 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
05/09/17 11:25 Dennis Myhre 8.25 11.4 52.5 60+
04/11/17 08:22 Jeremy Carolan 8.5 5.2 41.4 60+
10/11/16 09:20 Dennis Myhre 8.2 11.8 53.2 60+ 0.44 2.4 496 73.5 19.0 11.8
09/13/16 09:15 Dennis Myhre 8.1 14.3 57.7 10 1.07 8.6 15531 18.9 14.6 130.5
08/09/16 09:10 Dennis Myhre 8.1 13.9 57.0 60 0.51 9.0 1259 22.9 16.8 15.8
07/12/16 13:55 Dennis Myhre 8.39 16.1 61.0 60+ 0.26 8.1 504 24.1 18.3 7.5
06/14/16 09:25 Dennis Myhre 8.07 13.8 56.8 41 0.6 10.5 0 26.9 16.8 24.7
05/10/16 09:10 Dennis Myhre 8.1 10.5 50.9 60+ 0.41 8.7 886 25.9 18.7 11
04/12/16 14:30 8.31 11.0 51.8 60+ 0.34 10.3 21 23.4 17.1 4.3
10/06/15 09:05 Dennis Myhre 8.3 10.4 50.7 60+ 0.12 5.1 146 21.2 26.8 3.8
09/01/15 11:20 Dennis Myhre 8.3 14.4 57.9 60+ 0.16 5.4 6488 22.9 27.9 5
08/04/15 09:10 Dennis Myhre 8.14 12.5 54.5 60+ 0.13 5.5 455 18.0 18.8 13.5
07/07/15 09:20 Dennis Myhre 8.1 12.9 55.2 50 0.15 7.6 3654 18.5 14.6 1.5
06/02/15 09:05 Dennis Myhre 8.1 11.4 52.5 50 0.13 8.4 540
05/05/15 11:15 Dennis Myhre 8.1 10.8 51.4 60+ 0.1 6.7 370
04/07/15 00:00
10/07/14 09:05 Dennis Myhre 8.21 10.0 50.0 60+ 0.15 5.4 1100
09/02/14 11:25 Dennis Myhre 8.2 14.5 58.1 47 0.25 6.0 7300
08/05/14 13:50 Dennis Myhre 8.23 14.3 57.7 58 0.14 7.7 440
07/08/14 11:30 Jeremy Carolan 8.02 15.3 59.5 15.8 0.27 8.8 24000+
06/03/14 09:16 Jon Young 8.18 12.1 53.8 42 0.11 6.7 3900
05/06/14 00:00 Dennis Myhre 8.28 10.4 50.7 60+ 0.1 8.0 330
04/01/14 00:00 Dennis Myhre 7.95 5.5 41.9 22 0.36 4.7 510
10/01/13 00:00 Dennis Myhre 8.3 12.4 54.3 60+ 0.07 6.0 910 <0.05
09/03/13 00:00 Dennis Myhre 8.3 12.3 54.1 60+ 0.1 7.0 280 <0.05
08/06/13 00:00 Dennis Myhre 8.0 12.6 54.7 30 0.17 7.1 24000+ <0.05
07/09/13 00:00 Josh Dansdill 7.91 16.7 62.1 10 0.19 8.4 24000 0.27
06/04/13 00:00 Dennis Myhre 8.03 11.1 52.0 37 0.15 9.8 680 <0.05
05/07/13 00:00 Dennis Myhre 8.1 10.2 50.4 60 0.12 9.5 260 <0.05
04/09/13 00:00 Dennis Myhre 7.86 7.2 45.0 60 0.19 4.4 10 <0.05
10/02/12 16:15 Dennis Myhre 8.3 11.7 53.1 60+ 0.06 3.9 75 <0.05
09/04/12 14:00 Dennis Myhre 8.0 14.8 58.6 60+ 0.1 4.4 41 <0.05
08/07/12 13:35 Dennis Myhre 8.1 14.7 58.5 60+ 0.09 4.6 75 <0.05
07/02/12 16:40 Paul Berland 8.4 16.4 61.5 60+ 0.12 5.2 95 0.06
07/02/12 16:35 Paul Berland 8.4 16.4 61.5 60+ 0.12 5.2 86 <0.05
06/05/12 14:15 Dennis Myhre 8.0 11.9 53.4 60+ 0.09 5.6 170 <0.05
05/01/12 16:30 Dennis Myhre 8.3 10.8 51.4 60 0.15 6.1 12000 <0.05
04/03/12 13:30 Jeremy Carolan 8.11 9.3 48.7 60+ 0.11 5.0 460 <0.05
10/04/11 14:05 0.09 5.7 110 <0.05
09/06/11 16:20 Dennis Myhre 8.1 12.2 54.0 60+ 0.18 5.8 7300 <0.05
08/02/11 14:15 Dennis Myhre 7.9 14.1 57.4 60+ 0.12 8.0 390 <0.05
07/05/11 18:20 Dennis Myhre 8.1 15.6 60.1 60+ 0.09 6.8 300 <0.05
06/07/11 14:00 Dennis Myhre 7.88 13.4 56.1 60+ 0.1 8.4 330 <0.05
05/03/11 12:55 Dennis Myhre 7.8 7.8 46.0 60+ 0.08 7.7 330 <0.05
10/05/10 16:20 Dennis Myhre 8.2 10.5 50.9 60+ 0.08 6.8 370 <0.05
09/07/10 15:50 Dennis Myhre 7.8 12.6 54.7 60 0.14 6.7 4600 <0.05
08/03/10 16:40 Dennis Myhre 7.7 14.8 58.6 60+ 0.13 7.4 1200 <0.05
07/06/10 18:20 Dennis Myhre 7.5 17.1 62.8 13 0.43 8.3 46000 0.06
06/01/10 16:20 Dennis Myhre 8.1 13.9 57.0 60+ 0.1 6.6 310 <0.05
05/04/10 20:20 Dennis Myhre 8.1 15.4 59.7 60+ 0.11 5.6 270 <0.05
04/06/10 16:41 Jeremy Carolan 7.71 9.4 48.9 53 0.25 6.0 30000 0.25
10/06/09 19:35 8.0 10.9 51.6 60+ 0.15 4.1 1500 <0.05
09/01/09 16:15 0.11 4.5 170 <0.05
08/04/09 14:00 7.7 12.0 53.6 60+ 0.1 4.9 460 <0.05
07/07/09 14:25 7.88 12.0 53.6 60+ 0.1 5.1 180 <0.05
06/02/09 14:30 8.0 10.9 51.6 60+ 0.1 5.2 360 <0.05
05/05/09 16:15 9.44 49.0 60+ 0.13 5.2 410 <0.05
04/07/09 16:30 8.5 7.9 46.2 60+ 0.1 4.9 10 <0.05
10/07/08 14:15 0.09 5.8 390 <0.05
09/02/08 16:30 8.0 16.9 62.4 60+ 0.1 6.8 200 <0.05
08/05/08 19:35 7.9 18.3 64.9 56 0.12 7.8 1100 <0.05
07/01/08 14:20 7.8 13.6 56.5 46 0.14 8.2 4500 <0.05
06/03/08 14:20 7.8 12.3 54.1 60+ 0.12 7.2 550 <0.05
05/06/08 16:20 Dennis Myhre 7.6 12.0 53.6 53 0.13 7.5 160 <0.05
04/01/08 16:00 Dennis Myhre 7.75 6.0 42.8 18 0.42 7.1 4900 0.39
10/16/07 14:15 8.0 12.2 54.0 60+ 0.18 7.7 33000 <0.05
09/04/07 14:05 7.8 14.8 58.6 42 0.15 7.1 1200 <0.05
08/07/07 16:15 7.5 22.3 72.1 0 8.2 1.3 690000 1.4
07/02/07 14:10 7.86 13.4 56.1 60+ 0.12 8.3 380 <0.05
06/05/07 14:15 7.7 13.4 56.1 23 0.28 11.0 5900 <0.05
05/01/07 16:15 8.0 13.0 55.4 60+ 0.1 6.8 <10 <0.05
04/03/07 14:13 7.9 9.0 48.2 4 1.6 8.2 35000 0.25
10/03/06 14:05 7.8 12.2 54.0 60+ 0.1 4.1 110 <0.05
09/05/06 14:10 7.86 11.8 53.2 60+ 0.1 4.9 70 <0.05
08/01/06 14:10 7.9 15.0 59.0 60+ 0.11 5.5 310 <0.05
07/05/06 14:05 8.0 13.0 55.4 60+ 0.12 6.7 280 <0.05
06/06/06 16:25 8.0 14.5 58.1 60+ 0.21 6.8 71000 <0.05
05/02/06 14:15 7.88 10.9 51.6 51 0.22 7.5 25000 <0.05
04/04/06 14:30 7.9 8.0 46.4 31 0.25 8.2 790 0.12
10/04/05 14:20 8.4 15.6 60.1 60+ 0.11 4.1 170 <0.05 13.21
09/06/05 18:35 8.35 13.0 55.4 55 0.15 4.2 710 <0.05
08/02/05 14:10 8.33 23.7 74.7 45 0.12 5.0 570 <0.05 26.58
07/05/05 14:25 8.4 12.0 53.6 60+ 0.14 4.6 190 <0.05
06/07/05 14:15 8.7 7.0 44.6 60+ 0.17 4.6 3900 <0.05 23.22
05/03/05 14:00 8.6 11.3 52.3 60+ 0.09 4.5 64 <0.05 17.19
04/06/05 16:20 8.6 11.3 52.3 60+ 0.11 4.5 <10 <0.05
10/26/04 13:10 0.1 5.2 20 <0.05
09/28/04 16:15 0.09 5.4 110 <0.05
08/31/04 15:50 0.11 5.9 270 <0.05
07/27/04 15:40 0.12 7.7 1700 <0.05
06/29/04 15:00 0.1 9.0 150 <0.05
04/27/04 16:30 0.1 3.4 100 <0.05
05/02/02 17:50 0.15 5.2 <0.05 0.09 36.0
01/30/02 15:15 0.06 4.9 <0.05 <0.05 10.0
10/11/00 15:30 0.2 5.7 <0.1 0.09 30.0
  • 05/09/2017: overcast, temps mid 50s. T-storms overnight over UIR, dropping variable amounts of rain (0.10 - 1.33 inches in Dorchester)
  • 04/07/2015: Sample Lost

Yearly Averages for Trout Run (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 8.1 (8.2) 12.5 (15.0) 54.5 (59.0) 59 (60) 0.27 (0.15) 6.4 (5.7) 671 (299) 0.08 (0.07) 20.05 (18.32) 0.07 (0.14) 22 (74) 26.93 (15.85) 19.04 (14.37) 21 (11)
2017 Mean 8.4 (8.2) 8.3 (10.0) 47.0 (50.0) 60+ (60+)
2016 Mean 8.2 (8.2) 13.1 (15.1) 55.5 (59.2) 57 (60+) 0.52 (0.37) 8.2 (7.3) 671 (236) 30.8 (16.26) 17.33 (14.3) 29 (14)
2015 Mean 8.2 (8.4) 12.1 (15.1) 53.7 (59.1) 60+ (60+) 0.13 (0.09) 6.5 (5.8) 825 (197) 20.15 (15.12) 22.03 (14.49) 6 (5)
2014 Mean 8.2 (8.2) 11.7 (13.9) 53.1 (57.0) 47 (48) 0.2 (0.16) 6.8 (6.2) 1823 (479)
2013 Mean 8.1 (8.2) 11.8 (13.9) 53.2 (57.0) 49 (49) 0.14 (0.14) 7.5 (6.3) 846 (437) 0.07 (0.08)
2012 Mean 8.2 (8.3) 12.8 (16.3) 55.0 (61.4) 60+ (60+) 0.1 (0.09) 5.0 (3.7) 211 (230) <0.05 (0.06)
2011 Mean 8.0 (8.4) 12.6 (16.9) 54.7 (62.5) 60+ (60+) 0.11 (0.08) 7.1 (5.5) 466 (214) <0.05 (<0.05)
2010 Mean 7.9 (8.0) 13.4 (13.9) 56.1 (57.0) 59 (60+) 0.18 (0.1) 6.8 (6.1) 2183 (436) 0.07 (<0.05)
2009 Mean 8.0 (8.2) 10.5 (13.4) 50.9 (56.1) 60+ (60+) 0.11 (0.08) 4.8 (4.3) 227 (204) <0.05 (0.05)
2008 Mean 7.8 (8.1) 13.2 (15.0) 55.7 (59.1) 53 (58) 0.16 (0.12) 7.2 (5.7) 774 (357) 0.09 (0.09) (0.09)
2007 Mean 7.8 (8.1) 14.0 (15.4) 57.2 (59.8) 41 (53) 1.52 (0.22) 7.2 (6.2) 4026 (745) 0.26 (0.06) (0.11)
2006 Mean 7.9 (8.2) 12.2 (16.5) 54.0 (61.7) 60+ (56) 0.16 (0.14) 6.2 (5.3) 991 (388) 0.05 (<0.05) (0.12)
2005 Mean 8.5 (8.5) 13.4 (16.6) 56.1 (61.9) 60+ (55) 0.13 (0.11) 4.5 (5.3) 221 (180) <0.05 (0.11) 20.05 (18.32) (0.14)
2004 Mean 0.1 (0.1) 6.1 (5.4) 157 (170) <0.05 (0.05) (0.19)
2002 Mean 0.11 (0.21) 5.1 (5.9) <0.05 (0.15) 0.07 (0.09) 19 (32)
2001 Mean (0.14) (12.6) (0.1) (0.54) (934)
2000 Mean 0.2 (0.41) 5.7 (4.8) 0.08 (0.12) 0.09 (0.21) 30 (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 3.3% 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 70.5% 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 Trout Run (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 14:20 7.4 3.4 38.1 6 1.2 4.3 3800 0.77
07/25/05 16:20 8.43 21.7 71.1 60+ 0.5 4.7 44000 0.1
05/25/04 16:30
05/25/04 16:30 0.4 11.0 13000 0.07
07/29/02 15:35 1.9 2.8 0.31 0.36 190000.0
06/04/02 21:20 1.8 4.5 0.55 22.0 200000.0
06/15/01 14:10 0.3 6.5 <0.1 0.4 50000.0
04/03/01 15:00 0.4 9.6 <0.1 <0.05 130.0
08/17/00 16:45 1.9 3.9 0.2 0.15 400000.0
07/05/00 16:00 0.2 7.5 <0.1 0.29 1200.0
05/18/00 19:50 <0.1 3.7 0.1 0.52 740.0
02/24/00 18:00 1.3 3.8 1.0 0.1 5800.0

Site Information

NameTrout Run
Code16-TRU-10
CountyWinneshiek
Latitude43.2895
Longitude-91.7594
UTM_X600642.0
UTM_Y4793711.0
Sampled byCity of Decorah Water Department

Sampling Location

Nearby Sampling Locations

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