Monthly Water Sampling Results for Bigalk Creek 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 11:40 Theresa Shay 7.87 12.2 54.0 53
04/11/17 11:49 Josh Dansdill 8.05 6.6 43.9 60+
10/11/16 11:55 Theresa Shay 8.13 13.9 57.0 51 0.28 8.2 613 9.6 12.5 8.8
09/13/16 11:45 Theresa Shay 7.92 15.0 59.0 37 0.44 7.3 2064 10.6 12.4 24.3
08/09/16 11:17 Theresa Shay 8.14 19.4 67.0 50 0.26 9.1 2282 10.5 13.9 10.5
07/12/16 09:10 Theresa Shay 8.0 21.7 71.0 3 0.54 6.2 24196 8.7 11.3 163.6
06/14/16 11:00 Siepker & Pribyl 8.0 20.0 68.0 38 0.25 11.3 4106 10.1 13.6 20.3
05/10/16 12:10 Theresa Shay 8.21 13.3 56.0 60+ 0.15 9.4 146 11.9 14.9 1.8
04/12/16 11:36 Josh Dansdill 8.2 9.6 49.3 60+ 0.24 7.5 <4 12.4 16.1 1.7
10/06/15 11:45 Theresa Shay 7.82 11.1 52.0 60+ 0.06 7.9 20 14.9 20.1 0.5
09/01/15 09:30 Theresa Shay & Mike Siepker 8.03 21.6 70.9 48 0.09 6.6 631 10.4 14.7 8.2
08/04/15 12:00 Theresa Shay 8.36 21.6 70.9 58 0.08 7.4 1126 10.1 13.9 12.8
07/07/15 12:23 Theresa Shay 8.53 16.6 61.9 46 0.06 9.6 1153 8.9 11.2 3
06/02/15 12:28 Theresa Shay 17.2 63.0 60+ 0.04 10.0 880
05/05/15 12:22 Theresa Shay 14.4 57.9 60+ 0.04 8.6 460
04/07/15 12:03 Josh Dansdill 8.3 7.7 45.9 60+ 0.05 7.2 31
10/07/14 11:26 Michael Hoeper 10.0 50.0 39 0.1 8.0 580
09/02/14 11:30 Michael Hoeper 8.04 19.4 66.9 30 0.17 6.5 7700
08/05/14 11:45 Theresa Shay 8.12 19.5 67.1 47 0.07 9.2 1300
07/08/14 11:50 Zach Benttine 8.29 17.8 64.0 24 0.16 8.5 24000
06/03/14 11:50 Theresa Shay 8.11 20.0 68.0 60+ 0.05 8.0 2300
05/06/14 11:25 Bill Kalishek 8.4 11.6 52.9 60+ 0.02 9.5 <10
04/01/14 12:27 Theresa Shay 8.02 0.0 32.0 16 0.35 3.8 480
10/01/13 11:20 Bill Kalishek 8.39 15.5 59.9 53 0.06 8.5 1000 <0.05
09/03/13 10:55 Theresa Shay 7.91 16.7 62.1 49 0.05 8.7 310 <0.05
08/06/13 11:20 Tyler Willey 8.88 18.3 64.9 43 0.11 7.9 24000+ 0.11
07/09/13 00:00 Theresa Shay 19.4 66.9 21 0.15 8.8 24000+ <0.05
06/04/13 11:18 Theresa Shay 8.44 11.6 52.9 60+ 0.06 9.6 460 <0.05
05/07/13 11:30 Theresa Shay 8.39 13.3 55.9 60+ 0.08 9.7 75 <0.05
04/09/13 00:00 Bill Kalishek 7.55 5.5 41.9 44 0.2 3.2 20 0.3
10/02/12 16:17 Theresa Shay 7.95 9.4 49.0 60+ 0.05 7.8 10 <0.05
09/04/12 16:30 12.8 55.0 60+ 0.03 8.2 520 <0.05
08/07/12 16:15 Adam Grim 8.2 11.7 53.0 60+ 0.03 8.3 41 <0.05
07/02/12 16:26 0.22 <0.1 700 <0.05
06/05/12 16:15 JJ Moser 22.6 72.7 60+ 0.11 5.8 2000 0.17
05/01/12 17:00 Theresa Shay 8.65 12.2 54.0 60+ 0.04 4.8 20 0.05
04/03/12 16:35 Theresa Shay 11.8 53.2 60+ 0.03 8.6 370 <0.05
09/06/11 16:35 Theresa Shay 16.8 62.2 48 0.1 5.0 530 <0.05
08/02/11 16:11 7.11 28.7 83.7 60+ 0.07 7.8 3300 <0.05
07/05/11 14:30 22.2 72.0 25 0.11 6.9 3200 <0.05
06/07/11 16:05 23.3 74.0 60+ 0.09 8.0 3000 <0.05
05/03/11 14:00 8.5 6.7 44.0 60+ 0.05 8.9 63 <0.05
10/05/10 19:20 Theresa Shay 8.74 11.1 52.0 60+ 0.05 8.6 430 <0.05
09/07/10 16:10 JJ Moser 11.7 53.0 49 0.08 7.5 1500 <0.05
08/03/10 16:13 JJ Moser 8.59 18.3 65.0 35 0.09 8.0 1900 <0.05
07/06/10 16:00 6.3 18.3 65.0 46 0.08 8.6 1900 <0.05
06/01/10 16:05 Bill Kalishek 8.3 20.6 69.0 60+ 0.07 7.5 1000 <0.05
05/04/10 16:18 JJ Moser 8.39 13.3 56.0 60+ 0.05 7.3 75 <0.05
04/06/10 16:16 Theresa Shay & JJ Moser 8.36 7.8 46.0 60+ 0.04 7.2 31 <0.05
10/06/09 16:10 7.79 8.0 46.4 28 0.14 0.45 200 0.11
09/01/09 16:40 0.07 6.6 120 <0.05
08/04/09 16:15 8.02 19.4 66.9 50 0.06 5.4 30 <0.05
07/07/09 15:45 7.93 19.0 66.2 28 0.08 7.3 1700 0.1
06/02/09 14:30 8.0 12.2 54.0 60+ 0.06 8.7 2000 <0.05
05/05/09 15:20 8.12 14.0 57.2 60+ 0.04 6.3 10 0.05
04/07/09 15:44 Aaron Schwartzhoff 8.76 2.0 35.6 57 0.04 3.2 <10 0.07
10/07/08 15:35 0.13 7.1 470 <0.05 0.05
09/02/08 15:35 8.49 22.0 71.6 25 0.15 7.4 3900 <0.05 0.06
08/05/08 16:35 8.47 17.8 64.0 31 0.1 7.6 5100 <0.05 0.1
07/01/08 16:05 6.7 16.1 61.0 52 0.07 7.4 840 <0.05 0.15
06/03/08 16:15 8.5 13.9 57.0 28 0.09 7.0 5600 0.16 0.1
05/06/08 16:25 Aaron Schwartzhoff 8.48 12.2 54.0 60+ 0.05 7.2 40 <0.05 <0.05
04/01/08 15:46 Pecinovsky 8.1 3.9 39.0 25 0.2 7.0 660 0.27 <0.05
10/16/07 15:45 8.29 13.0 55.4 33 0.1 8.0 9500 0.06 0.06
09/04/07 16:40 8.43 16.0 60.8 54 0.06 7.4 1400 <0.05 <0.05
08/07/07 15:57 7.96 21.0 69.8 13 0.2 7.1 <0.05 0.06
07/02/07 16:06 8.3 19.4 66.9 30 0.14 8.4 2900 <0.05 <0.05
06/05/07 15:48 8.28 15.6 60.1 41 0.08 9.3 2000 <0.05 0.09
05/01/07 14:15 7.9 10.0 50.0 60+ 0.03 7.9 <0.05 <0.08
04/03/07 15:36 7.8 5.0 41.0 19 0.2 8.3 2500 <0.05 0.11
10/03/06 14:00 8.3 15.0 59.0 16 0.17 6.4 1800 <0.05 0.07
09/05/06 16:27 7.99 18.6 65.5 18 0.13 8.0 2500 <0.05 0.09
08/01/06 15:58 7.56 25.4 77.7 9 0.29 8.2 5000 0.23 0.09
07/05/06 14:30 8.18 18.2 64.8 15 0.14 8.3 3700 <0.05 0.15
06/06/06 16:15 7.99 19.5 67.1 24 0.13 7.9 21000 <0.05 0.15
05/02/06 18:15 8.2 15.4 59.7 60+ 0.03 9.3 40 <0.05 0.08
04/04/06 18:10 7.9 8.5 47.3 51 0.07 9.2 <10 <0.05 <0.05
10/04/05 16:30 8.14 13.8 56.8 60+ 0.07 6.6 50 <0.05 3.1 <0.05
09/06/05 15:45 8.06 14.1 57.4 55 0.04 6.6 10 <0.05 <0.05
08/02/05 15:30 7.77 19.8 67.6 6 0.08 6.7 850 <0.05 5.32 0.06
07/05/05 16:00 8.81 17.5 63.5 60+ 0.08 6.6 180 <0.05 <0.05
06/07/05 16:45 8.5 10.0 50.0 60+ 0.05 5.8 5400 <0.05 1.0 0.06
05/03/05 15:30 8.52 11.4 52.5 60+ 0.03 5.6 <10 0.08 3.46 <0.05
04/06/05 16:36 8.52 11.4 52.5 60+ <0.02 5.3 30 <0.05 <0.05
10/26/04 15:00 0.09 9.5 590 <0.05 0.08
09/30/04 18:00 40
09/28/04 14:20 0.06 9.8 <0.05 0.15
08/31/04 18:22 0.08 9.8 2800 <0.05 0.16
07/27/04 15:50 0.07 10.0 2400 <0.05 0.29
06/29/04 16:35 0.07 6.5 110 <0.05 0.11
05/02/02 18:19 <0.05 6.1 0.06 0.07 160.0
10/11/00 15:25 0.1 11.0 <0.1 0.14 210.0
  • 05/09/2017: overcast, temps mid 50s. T-storms overnight over UIR, dropping variable amounts of rain (0.10 - 1.33 inches in Dorchester)
  • 04/11/2017: Clear, baseflow
  • 10/11/2016: slightly turbid
  • 09/13/2016: flows up
  • 08/09/2016: good flow today
  • 05/10/2016: green tint to water
  • 04/12/2016: Base flow, Clear, Minnows
  • 10/06/2015: Normal site is a stagnant pool, took sample from bridge on 30th street
  • 09/01/2015: Slow water probably backed up by beaver dam - IC in total P bottle
  • 08/04/2015: Water backed up by downstream beaver dam
  • 07/07/2015: beaver dam downstream backing up water
  • 06/02/2015: Beaver dam downstream of site
  • 04/07/2015: Low & clear
  • 09/02/2014: Water pump, they have been sucking water out, low flow
  • 07/08/2014: Muddy, medium-high flow
  • 06/03/2014: Water looks good
  • 05/06/2014: Clear and normal water levels
  • 04/01/2014: Possible beaver dam downstream
  • 10/01/2013: low flow
  • 09/03/2013: water green and bank is full (beaver dam)
  • 07/09/2013: Flows up & muddy - rain am
  • 06/04/2013: High flows (bank full) clear
  • 05/07/2013: Bank full flow
  • 04/09/2013: at Yankee ave
  • 10/02/2012: no water at Yankee Ave; downstream bridge - above county bridge
  • 09/04/2012: Sampled at 30th Street, Yankee Ave. Dry; pH Out of Calibration
  • 08/07/2012: Metal Bridge, 305th
  • 06/05/2012: pH Not Calibrated
  • 05/01/2012: water flowing
  • 04/03/2012: Sampled at 30th Street, Yankee Ave. Dry; pH Out of Calibration
  • 05/03/2011: Slightly high flow
  • 06/01/2010: Normal water level
  • 05/04/2010: Sunny 65 degrees, Breezy
  • 04/07/2009: a little low
  • 05/06/2008: Moderate to High Flow, Clear
  • 04/01/2008: Some Color, Flowing Good

Yearly Averages for Bigalk Creek (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) 14.8 (15.0) 58.6 (59.0) 51 (60) 0.11 (0.15) 7.5 (5.7) 488 (299) 0.06 (0.07) 3.22 (18.32) 0.09 (0.14) 183 (74) 10.74 (15.85) 14.05 (14.37) 23 (11)
2017 Mean 8.0 (8.2) 9.4 (10.0) 49.0 (50.0) 60+ (60+)
2016 Mean 8.1 (8.2) 16.1 (15.1) 61.0 (59.2) 46 (60+) 0.31 (0.37) 8.4 (7.3) 750 (236) 10.54 (16.26) 13.53 (14.3) 33 (14)
2015 Mean 8.2 (8.4) 15.7 (15.1) 60.4 (59.1) 60+ (60+) 0.06 (0.09) 8.2 (5.8) 297 (197) 11.08 (15.12) 14.98 (14.49) 6 (5)
2014 Mean 8.2 (8.2) 14.0 (13.9) 57.3 (57.0) 43 (48) 0.13 (0.16) 7.6 (6.2) 1030 (479)
2013 Mean 8.3 (8.2) 14.3 (13.9) 57.8 (57.0) 51 (49) 0.1 (0.14) 8.1 (6.3) 781 (437) 0.09 (0.08)
2012 Mean 8.3 (8.3) 13.4 (16.3) 56.2 (61.4) 60+ (60+) 0.07 (0.09) 6.2 (3.7) 156 (230) 0.06 (0.06)
2011 Mean 7.8 (8.4) 19.5 (16.9) 67.2 (62.5) 58 (60+) 0.08 (0.08) 7.3 (5.5) 1011 (214) <0.05 (<0.05)
2010 Mean 8.1 (8.0) 14.4 (13.9) 58.0 (57.0) 60 (60+) 0.07 (0.1) 7.8 (6.1) 474 (436) <0.05 (<0.05)
2009 Mean 8.1 (8.2) 12.4 (13.4) 54.4 (56.1) 51 (60+) 0.07 (0.08) 5.4 (4.3) 110 (204) 0.06 (0.05)
2008 Mean 8.1 (8.1) 14.3 (15.0) 57.8 (59.1) 39 (58) 0.11 (0.12) 7.2 (5.7) 1022 (357) 0.09 (0.09) 0.08 (0.09)
2007 Mean 8.1 (8.1) 14.3 (15.4) 57.7 (59.8) 37 (53) 0.12 (0.22) 8.1 (6.2) 2864 (745) <0.05 (0.06) 0.07 (0.11)
2006 Mean 8.0 (8.2) 17.2 (16.5) 63.0 (61.7) 29 (56) 0.14 (0.14) 8.2 (5.3) 920 (388) 0.07 (<0.05) 0.1 (0.12)
2005 Mean 8.3 (8.5) 14.0 (16.6) 57.2 (61.9) 60+ (55) 0.05 (0.11) 6.2 (5.3) 100 (180) <0.05 (0.11) 3.22 (18.32) <0.05 (0.14)
2004 Mean 0.07 (0.1) 9.1 (5.4) 445 (170) <0.05 (0.05) 0.16 (0.19)
2002 Mean 0.04 (0.21) 6.1 (5.9) 0.06 (0.15) 0.07 (0.09) 160 (32)
2001 Mean (0.14) (12.6) (0.1) (0.54) (934)
2000 Mean 0.1 (0.41) 11.0 (4.8) 0.08 (0.12) 0.14 (0.21) 210 (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 2.2% 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 67.1% 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 Bigalk Creek (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 15:35 7.1 0.0 32.0 50 1.0 1.2 2200 1.5 0.05
07/25/05 16:40 8.56 22.5 72.5 60+ 0.74 2.1 95000 0.1 0.32
05/25/04 16:00
05/25/04 16:00 0.15 11.0 930 0.09 1.2
07/29/02 16:49 1.2 <0.1 <0.05 0.08 4100.0
06/04/02 15:44 0.44 0.2 0.11 0.81 2900.0
06/15/01 16:15 0.3 6.0 <0.1 0.83 37000.0
04/03/01 15:02 0.1 6.7 <0.1 <0.05 55.0
08/17/00 16:30 0.2 8.2 <0.1 0.28 92000.0
07/05/00 15:35 0.1 8.1 <0.1 0.28 870.0
05/18/00 20:40 0.4 5.7 0.4 1.1 210000.0
02/24/00 15:00 2.2 3.7 0.7 0.37 1000.0

Site Information

NameBigalk Creek
Code07-BIG-10
CountyWinneshiek
Latitude43.4739
Longitude-92.0797
UTM_X574432.0
UTM_Y4813857.0
Sampled byIowa DNR Fisheries ~ Decorah Hatchery

Sampling Location

Nearby Sampling Locations

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