Monthly Water Sampling Results for Big Spring @ Big Spring Hatchery

Sample Date by pH

Chloride mg/L Celsius C Fahrenheit F Transparency cm DO mg/L P mg/L N mg/L E. Coli MPN/100mL Ammonia mg/L Total Suspended Solids mg/L Chloride (Lab) mg/L Sulfate mg/L
10/27/15 10:30 Gary Siegwarth 7.36 11.2 52.2 60+ 0.27 8.8 10 1 36.9 33.5
09/29/15 14:00 Brad Crawford 13.5 56.3 60+ 0.47 6.4 63 2.5 17.5 18.9
08/25/15 08:30 Gary Siegwarth 7.38 13.1 55.6 60+ 0.25 9.9 109 2.3 28.6 29.1
07/28/15 08:30 Gary Siegwarth 7.46 14.5 58.1 60+ 0.22 10.2 161 1.5 23.4 24.7
06/30/15 09:54 Gary Siegwarth 7.23 13.9 57.0 60+ 0.17 16.6 110 7.3 23.3 21.3
11/05/14 10:15 Aaron Schwartzhoff 7.62 <29 9.6 49.3 60+ 8 0.06 9.8 280
10/01/14 09:01 Wayne Wingert 7.48 <33 12.0 53.6 60+ 9 0.2 10.0 41
09/03/14 10:03 Gary Siegwarth 7.29 <33 14.3 57.7 60+ 9 0.22 9.6 430
08/06/14 09:26 Gary Siegwarth, Andrew 7.41 <29 14.7 58.5 60+ 8 0.19 11.0 130
07/09/14 08:41 Wayne Wingert, Andrew 7.3 <29 11.9 53.4 60+ 8 0.11 13.0 860
06/04/14 13:05 Brad Crawford 7.12 <29 10.7 51.3 60+ 8 0.13 11.0 85
05/07/14 07:15 Gary Siegwarth 7.2 <33 9.1 48.4 60+ 9 0.12 14.0 <10
04/02/14 08:50 Gary Siegwarth 6.9 <33 7.4 45.3 42.2 9 0.33 7.1 10
08/07/13 09:30 Gary Siegwarth, Maury 7.5 <30 12.9 55.2 35 7 0.2 11.0 3900 <0.05
04/10/13 09:05 Gary Siegwarth 7.4 <30 7.9 46.2 47 9
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Yearly Averages for Big Spring @ Big Spring Hatchery (with comparison to all sites in the watershed)

pH

Chloride mg/L Celsius C Fahrenheit F Transparency cm DO mg/L P mg/L N mg/L E. Coli MPN/100mL Ammonia mg/L Total Suspended Solids mg/L Chloride (Lab) mg/L Sulfate mg/L
All Years 7.3 (8.3) <33 (<33) 11.8 (15.6) 53.2 (60.1) 60+ (53) 8.4 (8.6) 0.21 (0.19) 10.6 (6.5) 104 (376) <0.05 (0.09) 3 (20) 25.94 (22.17) 25.5 (23.58)
2015 Mean 7.4 (8.3) (<33) 13.2 (17.3) 55.8 (63.1) 60+ (53) (7.2) 0.28 (0.23) 10.4 (6.1) 66 (442) 3 (20) 25.94 (22.17) 25.5 (23.58)
2014 Mean 7.3 (8.2) <33 (<33) 11.2 (14.6) 52.2 (58.3) 60+ (57) 8.5 (8.4) 0.17 (0.18) 10.7 (7.3) 88 (196)
2013 Mean 7.5 (8.2) <33 (<33) 10.4 (13.6) 50.7 (56.5) 41 (46) 8.0 (8.8) 0.2 (0.27) 11.0 (7.6) 3900 (960) <0.05 (0.13)

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).

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Water Quality Standards

For 50.0% 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 28.6% 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 Big Spring @ Big Spring Hatchery (Not part of above statistics)

Sample Date by pH

Chloride mg/L Celsius C Fahrenheit F Transparency cm DO mg/L P mg/L N mg/L E. Coli MPN/100mL Ammonia mg/L Total Suspended Solids mg/L Chloride (Lab) mg/L Sulfate mg/L
03/11/13 13:07 Gary Siegwarth 8.3 <33 4.3 39.7 4 1.1 2.0 2300 0.7

Site Information

NameBig Spring @ Big Spring Hatchery
CodeBIG-10
CountyClayton
Latitude42.9096
Longitude-91.4699
UTM_X624897.0
UTM_Y4751914.0
HUC_87060004
Sampled byIowa DNR Fisheries ~ Big Spring Hatchery

Sampling Location

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