Monthly Water Sampling Results for Cox Creek @ Highway 13

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 07:50 Eric Palas 8.8 9.1 48.4 60+ 9 0.07 2.4 41 6 12.7 15.2
09/29/15 07:50 Eric Palas 8.5 9.3 48.7 45 7 0.16 2.0 1281 15 12.3 13.9
08/25/15 07:35 Eric Palas 8.8 17.3 63.1 60 7 0.15 2.8 110 10 12.4 14.4
07/28/15 09:45 Eric Palas 8.4 <29 23.0 73.4 35 7 0.13 3.4 1169 4.5 11.1 13.4
06/30/15 07:40 Eric Palas 8.4 <29 17.9 64.2 7 8 0.32 7.0 16160 149.5 12.6 12.1
11/05/14 08:10 Eric Palas 8.6 <29 6.7 44.1 60+ 12 0.08 3.5 85
10/01/14 09:00 Pat Schaefers 8.41 <29 14.6 58.3 60+ 8 0.06 2.9 86
10/01/14 09:00 Pat Schaefers 8.41 <29 14.6 58.3 60+ 8 0.04 3.1 41
09/03/14 07:30 Eric Palas 8.2 <29 19.6 67.3 35 8 0.17 3.1 960
08/06/14 07:45 Eric Palas 8.2 <29 20.5 68.9 60+ 8 0.08 4.3 200
07/09/14 06:45 Eric Palas 8.1 <29 21.0 69.8 52 10 0.09 6.1 820
06/04/14 07:30 Eric Palas 8.0 <29 20.9 69.6 40 7 0.11 3.3 250
05/07/14 07:40 Eric Palas 8.1 <29 12.9 55.2 60+ 9 0.1 4.3 75
04/02/14 09:05 Eric Palas 8.7 <29 4.6 40.3 15 9 0.21 3.9 52
11/06/13 07:45 Eric Palas 8.5 <30 8.3 46.9 27 9 0.15 3.9 24000 0.1
10/16/13 08:15 Eric Palas 8.2 <30 11.9 53.4 60+ 9 0.08 3.8 540 <0.05
09/04/13 07:30 Eric Palas 8.3 <30 18.1 64.6 60+ 7 0.05 4.8 84 <0.05
08/07/13 07:45 Eric Palas 8.3 <30 21.6 70.9 41 7 0.08 4.6 1100 <0.05
08/07/13 07:45 Eric Palas 8.3 <30 21.6 70.9 41 7 0.08 4.6 1800 <0.05
07/10/13 09:10 Pat Schaefers 8.48 <30 22.1 71.8 12 8 0.2 5.0 9800 <0.05
06/05/13 07:45 Eric Palas 8.3 <30 12.2 54.0 39 9 0.1 5.4 820 0.05
06/05/13 07:45 Eric Palas 8.3 <30 12.2 54.0 37 9 0.11 5.6 570 <0.05
05/01/13 07:00 Eric Palas 8.4 <30 15.5 59.9 60+ 9 0.05 4.8 410 <0.05
04/10/13 07:15 Eric Palas 8.9 <30 3.9 39.0 2 12 1.2 3.2 16000 0.23
11/07/12 07:40 8.9 <33 5.5 41.9 60+ 11 0.04 2.7 160 <0.05
11/07/12 07:40 8.9 <33 5.5 41.9 60+ 11 0.06 2.7 160 <0.05
10/03/12 08:20 8.6 <33 12.1 53.8 45 10 0.05 3.5 240 <0.05
09/05/12 07:50 8.7 <33 18.4 65.1 3 9 1.2 1.6 24000+ 0.27
09/05/12 07:50 8.7 <33 18.4 65.1 3 9 1.1 1.6 24000+ 0.26
08/01/12 07:45 8.4 <33 23.8 74.8 38 7 0.12 2.1 360 <0.05
07/02/12 07:15 8.4 <33 26.4 79.5 25 7 0.14 2.4 1300 0.13
06/06/12 07:15 8.5 <33 18.3 64.9 45 9 0.05 3.4 640 <0.05
05/02/12 08:15 8.3 <33 13.5 56.3 6 11 0.45 2.8 14000 <0.05
04/04/12 07:15 8.6 <33 11.8 53.2 42 9 0.07 4.2 170 <0.05
04/04/12 07:15 8.6 <33 11.8 53.2 40 9 0.05 4.2 150 <0.05
11/02/11 07:55 8.6 <33 9.3 48.7 60+ 10 0.05 4.0 160 <0.05
10/05/11 07:15 8.6 <33 12.8 55.0 55 10 0.06 4.2 170 <0.05
09/07/11 07:32 8.5 <33 13.9 57.0 26 9 0.13 4.1 3400 <0.05
09/07/11 07:30 8.5 <33 13.9 57.0 26 9 0.11 4.2 1900 <0.05
08/03/11 07:10 7.5 <33 23.7 74.7 40 8 0.1 5.9 1300 0.11
07/06/11 07:10 8.6 <33 21.1 70.0 35 12 0.08 4.2 700 <0.05
06/01/11 07:30 8.5 <33 16.4 61.5 45 12 0.07 4.1 2100 <0.05
05/04/11 07:10 8.3 <33 6.4 43.5 48 12 0.06 4.4 1400 <0.05
05/04/11 07:10 8.3 <33 6.4 43.5 48 12 0.05 4.4 1000 <0.05
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Yearly Averages for Cox Creek @ Highway 13 (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 8.4 (8.3) <33 (<33) 15.1 (15.6) 59.2 (60.1) 44 (53) 9.0 (8.6) 0.17 (0.19) 3.9 (6.5) 658 (376) 0.07 (0.09) 37 (20) 12.22 (22.17) 13.8 (23.58)
2015 Mean 8.6 (8.3) <33 (<33) 15.3 (17.3) 59.6 (63.1) 44 (53) 7.6 (7.2) 0.17 (0.23) 3.5 (6.1) 642 (442) 37 (20) 12.22 (22.17) 13.8 (23.58)
2014 Mean 8.3 (8.2) <33 (<33) 15.1 (14.6) 59.2 (58.3) 54 (57) 8.9 (8.4) 0.11 (0.18) 4.0 (7.3) 164 (196)
2013 Mean 8.4 (8.2) <33 (<33) 14.2 (13.6) 57.6 (56.5) 42 (46) 8.8 (8.8) 0.24 (0.27) 4.5 (7.6) 1706 (960) 0.07 (0.13)
2012 Mean 8.6 (8.3) <33 (<33) 16.2 (17.4) 61.2 (63.3) 34 (51) 9.1 (8.8) 0.25 (0.17) 2.8 (4.8) 956 (374) 0.08 (0.07) (16)
2011 Mean 8.4 (8.3) <33 (<33) 14.8 (15.9) 58.6 (60.7) 46 (58) 10.4 (9.0) 0.07 (0.1) 4.4 (6.4) 718 (237) 0.05 (0.06)

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 0.0% 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 66.7% 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 Cox Creek @ Highway 13 (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 13:20 Eric Palas/Pat Schaefers <33 2.3 36.1 7 0.73 1.2 3100 0.7

Site Information

NameCox Creek @ Highway 13
CodeCOX-20
CountyClayton
Latitude42.7669
Longitude-91.4621
UTM_X625827.0
UTM_Y4736074.0
HUC_87060004
Sampled byClayton County Soil and Water Conservation District

Sampling Location

Nearby Sampling Locations

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