Monthly Water Sampling Results for Siewers Spring 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 Chloride (Lab) mg/L Sulfate mg/L Total Suspended Solids mg/L
10/10/17 14:00 Theresa Shay 7.36 11.9 53.4 31
09/12/17 14:00 Theresa Shay 7.46 12.4 54.3 50
08/08/17 14:00 Theresa Shay 7.62 13.1 55.6 60+
07/11/17 14:30 Theresa Shay, Sam Boyd 7.51 13.6 56.5 35
06/13/17 14:00 Theresa Shay 7.57 13.8 56.8 43
05/09/17 14:10 Theresa Shay 7.41 11.1 52.0 53
04/11/17 14:36 Josh Dansdill 8.41 10.2 50.4 60+
10/11/16 14:30 Theresa Shay 7.46 11.7 53.0 59 0.43 8.9 189 19.6 18.3 18.3
09/13/16 14:20 Theresa Shay 7.43 12.2 54.0 17 0.75 9.4 2481 19.4 13.6 88
08/09/16 13:07 Theresa Shay 7.33 14.4 58.0 42 0.48 8.7 613 21.9 12.9 5.5
07/12/16 15:30 Theresa Shay 7.5 13.3 56.0 43 0.24 8.5 813 23.8 18.3 1.3
06/14/16 13:23 Siepker & Pribyl 7.49 13.3 56.0 29 0.51 11.6 1178 26.5 16.4 32
05/10/16 14:35 Theresa Shay 7.54 11.1 52.0 60+ 0.44 8.9 521 26.4 18.6 7.7
04/12/16 13:40 Josh Dansdill 8.39 9.6 49.3 60+ 0.37 10.8 12 24.1 16.6 5.7
10/06/15 14:10 Theresa Shay 7.54 11.6 52.9 60+ 0.1 5.2 355 21.3 27.8 3.2
09/01/15 12:41 Theresa Shay & Mike Siepker 7.4 13.3 55.9 57 0.18 5.8 7701 22.6 8.2 11.5
08/04/15 14:10 Theresa Shay 7.57 12.7 54.9 44 0.13 5.8 602 17.4 19.5 16.3
07/07/15 15:05 Theresa Shay 7.92 12.7 54.9 42 0.15 9.4 7701 20.6 17.0 4
06/02/15 14:30 Theresa Shay 11.6 52.9 55 0.11 8.9 440
05/05/15 14:20 Theresa Shay 10.56 51.0 60+ 0.12 7.2 750
04/07/15 15:25 Josh Dansdill 8.0 8.8 47.8 60+ 0.12 5.8 10
10/07/14 14:11 Michael Hoeper 11.6 52.9 58 0.15 5.6 2100
09/02/14 15:00 Michael Hoeper 7.62 13.3 55.9 39 0.29 6.0 7700
08/05/14 14:00 Theresa Shay 7.55 12.5 54.5 31 0.14 7.7 750
07/08/14 14:35 Zach Benttine 7.93 14.4 57.9 6 0.49 8.6 24000+
06/03/14 14:10 Theresa Shay 7.68 11.1 52.0 24 0.19 6.7 2600
05/06/14 13:05 Bill Kalishek 7.8 8.8 47.8 60+ 0.17 8.3 <10
04/01/14 14:40 Theresa Shay 7.7 6.6 43.9 17 0.32 5.0 380
10/01/13 14:00 Bill Kalishek 8.99 11.1 52.0 54 0.09 6.0 2600 <0.05
09/03/13 14:45 Theresa Shay 8.04 12.2 54.0 42 0.12 7.1 360 <0.05
08/06/13 13:36 Tyler Willey 7.96 12.2 54.0 30 0.16 6.9 24000+ <0.05
07/09/13 00:00 Theresa Shay 12.2 54.0 60 0.14 8.9 1000 <0.05
06/04/13 13:40 Theresa Shay 8.32 10.0 50.0 23 0.17 9.6 360 <0.05
05/07/13 14:00 Theresa Shay 7.61 8.8 47.8 60+ 0.14 13.0 130 <0.05
04/09/13 00:00 Bill Kalishek 7.14 8.3 46.9 60+ 0.19 4.8 <10 <0.05
10/02/12 18:30 Theresa Shay 7.7 10.0 50.0 60+ 0.09 4.1 240 <0.05
09/04/12 20:00 14.4 58.0 60+ 0.11 4.4 430 <0.05
08/07/12 18:45 Adam Grim 8.19 11.7 53.0 60+ 0.11 4.9 330 <0.05
07/02/12 19:40 0.16 5.6 960 <0.05
06/05/12 18:35 JJ Moser 12.5 54.5 60+ 0.12 5.9 1500 <0.05
05/01/12 19:00 Theresa Shay 8.21 9.4 49.0 60 0.15 6.4 6100 <0.05
04/03/12 19:00 Theresa Shay 10.4 50.7 60+ 0.12 5.1 180 <0.05
10/04/11 18:25 0.12 5.8 250 <0.05
09/06/11 18:44 Theresa Shay 11.8 53.2 60+ 0.18 5.8 13000 <0.05
08/02/11 18:06 60+ 0.13 6.8 990 <0.05
07/05/11 20:55 0.12 7.2 550 <0.05
07/05/11 18:45 12.2 54.0 60 0.12 7.2 670 <0.05
06/07/11 18:04 60+ 0.12 8.6 1100 <0.05
06/07/11 18:03 60+ 0.13 8.5 880 <0.05
05/03/11 21:03 7.9 8.9 48.0 60+ 0.09 8.2 31 <0.05
10/05/10 21:45 0.11 6.7 700 <0.05
09/07/10 18:30 JJ Moser 9.4 49.0 58 0.12 6.7 1900 <0.05
08/03/10 18:37 JJ Moser 7.99 11.7 53.0 51 0.12 7.5 520 <0.05
07/06/10 17:00 5.3 12.2 54.0 13 0.31 8.7 20000 <0.05
06/01/10 18:10 Bill Kalishek 7.5 12.2 54.0 54 0.11 6.9 550 <0.05
05/04/10 19:00 JJ Moser 7.66 7.8 46.0 60+ 0.11 5.8 540 <0.05
04/06/10 18:25 Theresa Shay & JJ Moser 7.55 6.1 43.0 60+ 0.11 6.4 10 <0.05
  • 10/10/2017: Flows up, water muddy.
  • 09/12/2017: Water milky color @ spring
  • 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
  • 09/13/2016: flows up & muddy! Due to rain in area for 3 weeks
  • 05/10/2016: green tint to water
  • 07/08/2014: Very muddy, fast flow
  • 05/06/2014: Clear and normal water levels
  • 04/01/2014: Up and Muddy
  • 06/04/2013: Flows up and muddy
  • 10/02/2012: low flow
  • 09/04/2012: Low & Clear; pH Out of Calibration
  • 06/05/2012: pH Not Calibrated
  • 05/01/2012: flow is up
  • 04/03/2012: Low & Clear; pH Out of Calibration
  • 05/03/2011: Clear - normal flow
  • 07/06/2010: Very muddy
  • 06/01/2010: Normal water level
  • 05/04/2010: Sunny 78 degrees, Breezy

Yearly Averages for Siewers Spring (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 Chloride (Lab) mg/L Sulfate mg/L Total Suspended Solids mg/L
All Years 7.7 (8.2) 11.3 (15.1) 52.4 (59.2) 54 (60) 0.2 (0.15) 7.2 (5.7) 631 (299) <0.05 (0.07) 22.15 (15.85) 17.02 (14.37) 18 (11)
2017 Mean 7.6 (8.1) 12.3 (14.7) 54.1 (58.4) 51 (59)
2016 Mean 7.6 (8.2) 12.2 (15.1) 54.0 (59.2) 48 (60+) 0.46 (0.37) 9.5 (7.3) 403 (236) 23.1 (16.26) 16.39 (14.3) 23 (14)
2015 Mean 7.7 (8.4) 11.6 (15.1) 52.9 (59.1) 59 (60+) 0.13 (0.09) 6.9 (5.8) 635 (197) 20.48 (15.12) 18.13 (14.49) 9 (5)
2014 Mean 7.7 (8.2) 11.2 (13.9) 52.1 (57.0) 35 (48) 0.25 (0.16) 6.8 (6.2) 1156 (479)
2013 Mean 8.0 (8.2) 10.7 (13.9) 51.2 (57.0) 50 (49) 0.14 (0.14) 8.0 (6.3) 519 (437) <0.05 (0.08)
2012 Mean 8.0 (8.3) 11.4 (16.3) 52.5 (61.4) 60+ (60+) 0.12 (0.09) 5.2 (3.7) 659 (230) <0.05 (0.06)
2011 Mean 7.9 (8.4) 11.0 (16.9) 51.7 (62.5) 60+ (60+) 0.13 (0.08) 7.1 (5.5) 624 (214) <0.05 (<0.05)
2010 Mean 7.2 (8.0) 9.9 (13.9) 49.8 (57.0) 53 (60+) 0.14 (0.1) 7.0 (6.1) 634 (436) <0.05 (<0.05)

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 6.3% 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 81.3% 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).

Site Information

NameSiewers Spring
Code32-SSP-10
CountyWinneshiek
Latitude43.2723
Longitude-91.7806
UTM_X598954.0
UTM_Y4791773.0
Sampled byIowa DNR Fisheries ~ Decorah Hatchery

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