Cox Creek @ Highway 13 [COX-20]

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

Sampling Location

Yearly Averages for Cox Creek @ Highway 13 [COX-20] Download in CSV format
(with comparison to all locations 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 (60.0) 44 (52) 9.0 (8.6) 0.17 (0.21) 3.9 (6.7) 658 (372) 0.07 (0.09) 37 (29) 12.22 (27.87) 13.8 (22.17)
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)

*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 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).

Download in CSV format

Monthly Water Sampling Data for Cox Creek @ Highway 13 [COX-20]

Sample Date Time 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 12:50 Eric Palas 8.8 9.1 48.4 60+ 9 0.07 2.4 41 6 12.7 15.2
09/29/15 12:50 Eric Palas 8.5 9.3 48.7 45 7 0.16 2.0 1281 15 12.3 13.9
08/25/15 12:35 Eric Palas 8.8 17.3 63.1 60 7 0.15 2.8 110 10 12.4 14.4
07/28/15 14:45 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 12:40 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 14:10 Eric Palas 8.6 <29 6.7 44.1 60+ 12 0.08 3.5 85
10/01/14 14:00 Pat Schaefers 8.41 <29 14.6 58.3 60+ 8 0.06 2.9 86
10/01/14 14:00 Pat Schaefers 8.41 <29 14.6 58.3 60+ 8 0.04 3.1 41
09/03/14 12:30 Eric Palas 8.2 <29 19.6 67.3 35 8 0.17 3.1 960
08/06/14 12:45 Eric Palas 8.2 <29 20.5 68.9 60+ 8 0.08 4.3 200
07/09/14 11:45 Eric Palas 8.1 <29 21.0 69.8 52 10 0.09 6.1 820
06/04/14 12:30 Eric Palas 8.0 <29 20.9 69.6 40 7 0.11 3.3 250
05/07/14 12:40 Eric Palas 8.1 <29 12.9 55.2 60+ 9 0.1 4.3 75
04/02/14 14:05 Eric Palas 8.7 <29 4.6 40.3 15 9 0.21 3.9 52
11/06/13 13:45 Eric Palas 8.5 <30 8.3 46.9 27 9 0.15 3.9 24000 0.1
10/16/13 13:15 Eric Palas 8.2 <30 11.9 53.4 60+ 9 0.08 3.8 540 <0.05
09/04/13 12:30 Eric Palas 8.3 <30 18.1 64.6 60+ 7 0.05 4.8 84 <0.05
08/07/13 12:45 Eric Palas 8.3 <30 21.6 70.9 41 7 0.08 4.6 1100 <0.05
08/07/13 12:45 Eric Palas 8.3 <30 21.6 70.9 41 7 0.08 4.6 1800 <0.05
07/10/13 14:10 Pat Schaefers 8.48 <30 22.1 71.8 12 8 0.2 5.0 9800 <0.05
06/05/13 12:45 Eric Palas 8.3 <30 12.2 54.0 39 9 0.1 5.4 820 0.05
06/05/13 12:45 Eric Palas 8.3 <30 12.2 54.0 37 9 0.11 5.6 570 <0.05
05/01/13 12:00 Eric Palas 8.4 <30 15.5 59.9 60+ 9 0.05 4.8 410 <0.05
04/10/13 12:15 Eric Palas 8.9 <30 3.9 39.0 2 12 1.2 3.2 16000 0.23
11/07/12 13:40 8.9 <33 5.5 41.9 60+ 11 0.04 2.7 160 <0.05
11/07/12 13:40 8.9 <33 5.5 41.9 60+ 11 0.06 2.7 160 <0.05
10/03/12 13:20 8.6 <33 12.1 53.8 45 10 0.05 3.5 240 <0.05
09/05/12 12:50 8.7 <33 18.4 65.1 3 9 1.2 1.6 24000+ 0.27
09/05/12 12:50 8.7 <33 18.4 65.1 3 9 1.1 1.6 24000+ 0.26
08/01/12 12:45 8.4 <33 23.8 74.8 38 7 0.12 2.1 360 <0.05
07/02/12 12:15 8.4 <33 26.4 79.5 25 7 0.14 2.4 1300 0.13
06/06/12 12:15 8.5 <33 18.3 64.9 45 9 0.05 3.4 640 <0.05
05/02/12 13:15 8.3 <33 13.5 56.3 6 11 0.45 2.8 14000 <0.05
04/04/12 12:15 8.6 <33 11.8 53.2 42 9 0.07 4.2 170 <0.05
04/04/12 12:15 8.6 <33 11.8 53.2 40 9 0.05 4.2 150 <0.05
11/02/11 12:55 8.6 <33 9.3 48.7 60+ 10 0.05 4.0 160 <0.05
10/05/11 12:15 8.6 <33 12.8 55.0 55 10 0.06 4.2 170 <0.05
09/07/11 12:32 8.5 <33 13.9 57.0 26 9 0.13 4.1 3400 <0.05
09/07/11 12:30 8.5 <33 13.9 57.0 26 9 0.11 4.2 1900 <0.05
08/03/11 12:10 7.5 <33 23.7 74.7 40 8 0.1 5.9 1300 0.11
07/06/11 12:10 8.6 <33 21.1 70.0 35 12 0.08 4.2 700 <0.05
06/01/11 12:30 8.5 <33 16.4 61.5 45 12 0.07 4.1 2100 <0.05
05/04/11 12:10 8.3 <33 6.4 43.5 48 12 0.06 4.4 1400 <0.05
05/04/11 12:10 8.3 <33 6.4 43.5 48 12 0.05 4.4 1000 <0.05
  • 08/25/2015: Low flow
  • 07/28/2015: sampled after rain
  • 06/30/2015: 0.3 inches rain on 6/29/15 by landowners gage
  • 09/03/2014: Streambank work 1/2 mile upstream
  • 04/10/2013: High Flows, Turbid
  • 09/05/2012: 3.5" local rainfall
  • 09/05/2012: 3.5" local rainfall
  • 08/01/2012: Lowest flow observed on Cox Creek since monitoring initiated.

One-time Rainfall Event Samples for Cox Creek @ Highway 13 (Not part of above statistics)

Sample Date Time 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 18:20 Eric Palas/Pat Schaefers <33 2.3 36.1 7 0.73 1.2 3100 0.7

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