Monthly Water Sampling Results for Silver Creek West 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 12:15 Theresa Shay 7.98 12.8 55.0 60+
04/11/17 12:17 Josh Dansdill 8.45 7.2 45.0 60+
10/11/16 12:22 Theresa Shay 8.26 15.0 59.0 60+ 0.43 9.5 318 17.6 13.5 0.8
09/13/16 12:20 Theresa Shay 7.98 16.7 62.0 35 0.62 7.3 6867 17.7 12.5 19.3
08/09/16 09:30 Theresa Shay 8.08 17.2 63.0 60+ 0.57 10.2 20.0 14.7 8.5
07/12/16 08:40 Theresa Shay 8.24 19.4 67.0 28 0.45 9.6 4884 23.2 15.7 39.7
06/14/16 11:20 Siepker & Pribyl 8.29 18.3 65.0 37 0.74 13.9 1236 24.2 16.5 29
05/10/16 12:40 Theresa Shay 8.44 12.8 55.0 60+ 0.91 10.8 414 33.5 18.1 2.8
04/12/16 12:00 Josh Dansdill 8.45 7.0 44.6 60+ 0.45 11.8 8 26.2 17.5 2.5
10/06/15 12:20 Theresa Shay 8.61 14.4 57.9 60+ 0.54 7.3 2359 49.6 22.4 4.8
09/01/15 08:58 Theresa Shay & Mike Siepker 8.39 20.5 68.9 60+ 0.28 7.4 1396 36.9 19.6 3.8
08/04/15 12:32 Theresa Shay 8.7 20.0 68.0 60+ 0.24 7.9 617 25.9 16.1 5.5
07/07/15 13:08 Theresa Shay 8.62 17.2 63.0 60+ 0.16 9.3 1553 18.3 12.7 0.3
06/02/15 12:55 Theresa Shay 16.1 61.0 60+ 0.14 10.0 500
05/05/15 12:55 Theresa Shay 12.7 54.9 60+ 0.28 8.6 230
04/07/15 12:27 Josh Dansdill 8.8 6.5 43.7 60+ 0.33 8.8 30
10/07/14 12:13 Michael Hoeper 11.1 52.0 60+ 0.21 8.2 370
09/02/14 12:15 Michael Hoeper 8.21 17.5 63.5 60+ 0.25 7.5 1400
08/05/14 12:15 Theresa Shay 8.41 18.2 64.8 60+ 0.29 10.0 2100
07/08/14 12:28 Zach Benttine 8.33 17.2 63.0 29 0.2 8.7 3300
06/03/14 12:18 Theresa Shay 8.34 16.6 61.9 54 0.2 9.6 910
05/06/14 11:50 Bill Kalishek 8.5 8.8 47.8 60+ 0.08 10.0 20
04/01/14 12:56 Theresa Shay 8.09 1.1 34.0 29 0.29 6.0 480
10/01/13 11:50 Bill Kalishek 9.37 17.2 63.0 60+ 0.33 8.4 960 <0.05
09/03/13 11:20 Theresa Shay 8.64 14.4 57.9 60+ 0.2 10.0 930 <0.05
08/06/13 11:46 Tyler Willey 9.14 17.8 64.0 60+ 0.25 8.9 17000 0.07
07/09/13 00:00 Theresa Shay 20.0 68.0 17 0.27 9.7 11000 <0.05
06/04/13 11:45 Theresa Shay 8.77 11.1 52.0 60 0.11 11.0 540 0.17
05/07/13 12:15 Theresa Shay 8.34 11.6 52.9 60+ 0.12 13.0 95 <0.05
04/09/13 00:00 Bill Kalishek 8.0 6.6 43.9 18 0.31 6.0 600 0.12
10/02/12 16:30 Theresa Shay
09/04/12 17:35 24.4 76.0 60+ 2.0 2.7 230 1.7
08/07/12 16:45 Adam Grim
07/02/12 16:54 0.61 3.3 500 <0.05
06/05/12 16:45 JJ Moser 19.5 67.1 60+ 0.34 8.3 990 0.08
05/01/12 17:28 Theresa Shay 9.16 11.1 52.0 60+ 0.22 11.0 280 <0.05
04/03/12 17:10 Theresa Shay 16.6 61.9 60+ 0.4 3.7 470 <0.05
10/04/11 16:45 0.47 5.0 1300 <0.05
09/06/11 17:10 Theresa Shay 13.7 56.6 48 0.25 6.4 1100 <0.05
08/02/11 16:40 6.79 27.9 82.2 60+ 0.34 8.4 1200 <0.05
07/05/11 15:50 20.0 68.0 29 0.22 8.5 2000 <0.05
06/07/11 16:31 20.0 68.0 60+ 0.26 10.0 1000 0.14
05/03/11 13:35 8.6 5.6 42.0 59 0.14 10.0 140 <0.05
10/05/10 19:50 Theresa Shay 8.91 10.0 50.0 60+ 0.22 10.0 390 <0.05
09/07/10 16:42 JJ Moser 12.2 54.0 60+ 0.27 8.8 1000 <0.05
08/03/10 16:41 JJ Moser 8.81 17.2 63.0 60+ 0.25 9.5 960 <0.05
07/06/10 16:20 6.4 16.7 62.0 46 0.2 11.0 1900 <0.05
06/01/10 16:35 Bill Kalishek 8.5 18.3 65.0 60+ 0.24 9.2 1100 <0.05
05/04/10 16:44 JJ Moser 8.6 11.7 53.0 60+ 0.24 8.4 330 <0.05
04/06/10 16:45 Theresa Shay & JJ Moser 8.46 7.2 45.0 60+ 0.21 8.1 340 <0.05
10/06/09 16:30 8.33 8.0 46.4 60+ 0.38 6.3 1800 <0.05
09/01/09 17:00 0.36 7.5 1000 <0.05
08/04/09 17:10 8.5 17.7 63.9 60+ 0.37 6.8 760 <0.05
07/07/09 16:10 8.51 17.0 62.6 60+ 0.23 8.8 1200 <0.05
06/02/09 14:10 8.4 11.1 52.0 42 0.39 9.7 1100 <0.05
05/05/09 15:40 8.59 12.0 53.6 60+ 0.44 6.8 840 0.08
04/07/09 17:00 Aaron Schwartzhoff 8.88 4.0 39.2 60+ 0.34 7.2 <10 0.58
10/07/08 16:10 1.5 7.4 1600 <0.05 0.08
09/02/08 16:05 8.7 21.0 69.8 60+ 0.63 8.6 1400 0.11 0.09
08/05/08 17:10 8.43 18.9 66.0 60+ 0.27 9.6 840 0.07 0.11
07/01/08 16:30 6.7 15.6 60.0 60+ 0.19 9.8 1300 <0.05 0.29
06/03/08 16:40 8.7 13.3 55.9 60+ 0.23 8.6 660 <0.05 0.11
05/06/08 16:54 Aaron Schwartzhoff 8.68 12.8 55.0 60+ 0.3 8.5 40 0.25 0.11
04/01/08 16:17 Pecinovsky 8.09 3.3 37.9 20 0.44 7.0 600 0.33 <0.05
10/16/07 16:10 8.37 13.0 55.4 55 0.42 8.7 2900 <0.05 0.07
09/04/07 17:10 8.47 17.0 62.6 60+ 0.17 8.4 590 <0.05 <0.05
08/07/07 16:27 8.39 20.5 68.9 60+ 1.1 8.2 2300 <0.05 0.12
07/02/07 16:35 8.5 19.4 66.9 45 0.98 11.0 1400 <0.05 0.05
06/05/07 15:19 8.2 15.5 59.9 46 0.51 9.6 830 <0.05 0.15
05/01/07 16:15 8.4 12.2 54.0 60+ 0.51 8.8 110 <0.05 0.05
04/03/07 15:07 7.69 6.0 42.8 15.5 0.45 7.8 7400 0.09 0.14
10/03/06 13:40 8.2 15.5 59.9 60+ 1.7 6.6 3100 <0.05 0.1
09/05/06 17:01 8.45 20.5 68.9 60+ 1.7 8.6 1400 <0.05 0.1
08/01/06 16:23 8.27 25.4 77.7 19 1.9 8.8 1600 <0.05 0.1
07/05/06 16:40 8.5 20.0 68.0 55 0.75 11.0 690 <0.05 0.16
06/06/06 16:45 8.07 19.1 66.4 15 0.87 9.2 40000 0.07 0.47
05/02/06 18:40 7.8 13.9 57.0 60+ 0.32 12.0 300 <0.05 0.12
04/04/06 18:30 7.9 8.4 47.1 52 0.33 12.0 <10 <0.05 0.055
10/04/05 17:00 8.48 20.9 69.6 50 0.61 9.1 1500 <0.05 17.64 0.1
09/06/05 16:15 8.71 22.3 72.1 34 0.85 7.9 1300 <0.05 0.13
08/02/05 15:10 8.37 21.6 70.9 51 0.85 9.2 3300 <0.05 7.63 0.2
07/05/05 15:30 8.77 23.5 74.3 60+ 0.46 10.0 650 <0.05 0.22
06/07/05 16:15 8.9 7.6 45.7 60+ 0.87 8.6 2300 <0.05 1.17 0.3
05/03/05 16:00 9.15 12.8 55.0 60+ 1.2 8.8 60 <0.05 7.6 0.15
04/06/05 16:10 9.15 12.8 55.0 60+ 1.4 8.5 20 <0.05 0.05
10/27/04 21:00 1.5 7.9 330 <0.05 0.06
09/28/04 16:15 1.6 9.4 310 <0.05 0.14
08/31/04 18:46 0.92 10.0 410 <0.05 0.2
07/27/04 15:10 0.53 12.0 500 <0.05 0.29
06/29/04 16:05 0.52 11.0 470 <0.05 0.41
04/27/04 16:40 0.08 2.2 2400 0.05 0.07
05/02/02 17:42 0.9 8.9 <0.05 0.09 470.0
10/11/00 16:00 0.8 10.0 <0.1 0.12 400.0
  • 05/09/2017: 325th st. 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, baseflow
  • 09/13/2016: site moved permanently to 325th - road closed - raging water
  • 08/09/2016: took sample off 325th st bridge
  • 04/12/2016: Flowing at Site D
  • 10/06/2015: Used alternative site on 325th st
  • 09/01/2015: got water at the bridge on 325th street - IC in total P bottle
  • 08/04/2015: Took Sample @ bridge on 9th st regular bridge out
  • 07/07/2015: Took sample from 325th st bridge / 310 bridge out
  • 06/02/2015: Bridge out , no planks
  • 04/07/2015: Low & clear (sites C and D are dry)
  • 09/02/2014: good flow
  • 08/05/2014: good flow
  • 07/08/2014: Small leaf debris, fast flow
  • 06/03/2014: Good
  • 05/06/2014: Clear and normal water levels
  • 04/01/2014: Up and Muddy
  • 10/01/2013: low flow - Sampled at 325th st
  • 09/03/2013: flow low
  • 06/04/2013: High flows (near full bank) clear
  • 05/07/2013: High flows
  • 04/09/2013: at 310th Ave
  • 10/02/2012: Dry - no water at any bridge!
  • 09/04/2012: Sampled at Hwy 139; pH Out of Calibration
  • 08/07/2012: All Locations Dry
  • 06/05/2012: pH Not Calibrated
  • 05/01/2012: water flowing
  • 04/03/2012: Sampled @ 325th St., 310th. Ave Dry; pH Out of Calibration
  • 09/06/2011: water foamy & not moving - dry above bridge
  • 05/03/2011: Slightly high flow
  • 06/01/2010: Normal water level
  • 05/04/2010: Sunny 68 degrees, Breezy
  • 04/07/2009: low & clear
  • 05/06/2008: Moderate to High Flow, Clear
  • 04/01/2008: High Flow, Slightly Off Color

Yearly Averages for Silver Creek West (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 8.4 (8.2) 14.9 (15.0) 58.8 (59.0) 60+ (60) 0.53 (0.15) 8.7 (5.7) 688 (299) 0.09 (0.07) 8.51 (18.32) 0.14 (0.14) 434 (74) 26.65 (15.85) 16.3 (14.37) 11 (11)
2017 Mean 8.2 (8.2) 10.0 (10.0) 50.0 (50.0) 60+ (60+)
2016 Mean 8.2 (8.2) 15.2 (15.1) 59.4 (59.2) 55 (60+) 0.6 (0.37) 10.4 (7.3) 593 (236) 23.2 (16.26) 15.5 (14.3) 15 (14)
2015 Mean 8.6 (8.4) 15.3 (15.1) 59.6 (59.1) 60+ (60+) 0.28 (0.09) 8.5 (5.8) 524 (197) 32.68 (15.12) 17.7 (14.49) 4 (5)
2014 Mean 8.3 (8.2) 12.9 (13.9) 55.3 (57.0) 57 (48) 0.22 (0.16) 8.6 (6.2) 610 (479)
2013 Mean 8.7 (8.2) 14.1 (13.9) 57.4 (57.0) 55 (49) 0.23 (0.14) 9.6 (6.3) 1263 (437) 0.07 (0.08)
2012 Mean 9.2 (8.3) 17.9 (16.3) 64.3 (61.4) 60+ (60+) 0.71 (0.09) 5.8 (3.7) 432 (230) 0.38 (0.06)
2011 Mean 7.7 (8.4) 17.4 (16.9) 63.4 (62.5) 56 (60+) 0.28 (0.08) 8.1 (5.5) 885 (214) 0.06 (<0.05)
2010 Mean 8.3 (8.0) 13.3 (13.9) 56.0 (57.0) 60+ (60+) 0.23 (0.1) 9.3 (6.1) 706 (436) <0.05 (<0.05)
2009 Mean 8.5 (8.2) 11.6 (13.4) 53.0 (56.1) 60+ (60+) 0.36 (0.08) 7.6 (4.3) 532 (204) 0.12 (0.05)
2008 Mean 8.2 (8.1) 14.2 (15.0) 57.4 (59.1) 60+ (58) 0.51 (0.12) 8.5 (5.7) 629 (357) 0.13 (0.09) 0.12 (0.09)
2007 Mean 8.3 (8.1) 14.8 (15.4) 58.6 (59.8) 54 (53) 0.59 (0.22) 8.9 (6.2) 1207 (745) <0.05 (0.06) 0.09 (0.11)
2006 Mean 8.2 (8.2) 17.5 (16.5) 63.6 (61.7) 51 (56) 1.08 (0.14) 9.7 (5.3) 895 (388) <0.05 (<0.05) 0.16 (0.12)
2005 Mean 8.8 (8.5) 17.4 (16.6) 63.2 (61.9) 60+ (55) 0.89 (0.11) 8.9 (5.3) 529 (180) <0.05 (0.11) 8.51 (18.32) 0.16 (0.14)
2004 Mean 0.86 (0.1) 8.8 (5.4) 536 (170) <0.05 (0.05) 0.2 (0.19)
2002 Mean 0.9 (0.21) 8.9 (5.9) <0.05 (0.15) 0.09 (0.09) 470 (32)
2001 Mean (0.14) (12.6) (0.1) (0.54) (934)
2000 Mean 0.8 (0.41) 10.0 (4.8) 0.08 (0.12) 0.12 (0.21) 400 (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 15.7% 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 84.9% 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 Silver Creek West (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 15:05 7.43 0.0 32.0 23 0.92 4.4 1600 0.82 <0.05
07/25/05 16:45 8.57 22.2 72.0 60+ 1.1 7.5 12000 0.08 0.22
05/25/04 15:40
05/25/04 15:40 0.38 13.0 4400 <0.05 1.6
07/29/02 15:24 1.2 6.0 0.28 0.31 200000.0
06/04/02 15:03 3.3 4.9 0.26 4.2 12000.0
06/15/01 16:30 0.4 10.0 <0.1 2.5 45000.0
04/03/01 15:29 0.5 9.5 <0.1 0.07 320.0
08/17/00 16:03 0.8 8.2 <0.1 0.15 5400.0
07/05/00 16:00 0.2 11.0 0.2 0.35 1100.0
05/18/00 19:15 4.5 5.9 1.8 5.0+ 690000.0
02/24/00 17:25 1.9 5.2 0.6 0.16 1900.0

Site Information

NameSilver Creek West
Code08-SIW-40
CountyWinneshiek
Latitude43.407
Longitude-92.0108
UTM_X580096.0
UTM_Y4806489.0
Sampled byIowa DNR Fisheries ~ Decorah Hatchery

Sampling Location

Nearby Sampling Locations

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