Monthly Water Sampling Results for Unnamed Creek, Silver Creek Watershed @ 125th St

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 09:00 Eric Palas 8.3 221 8.3 46.9 35 9 4.54 27.9 161 222.1 46.8
09/29/15 10:00 Eric Palas 8.6 134 16.7 62.1 15 7 0.96 2.6 9804 121.2 24.4 6.8
08/25/15 09:25 Eric Palas 8.4 189 14.4 57.9 30 7 7.1 24.5 355 79.3 198.8 39.3
07/28/15 08:30 Eric Palas 8.1 147 19.6 67.3 48 6 3.91 17.1 2909 4.9 140.0 37.9
06/30/15 08:45 Eric Palas 8.1 48 13.9 57.0 38 9 0.34 14.8 5475 47.5 56.1 19.7
11/05/14 09:05 Eric Palas 8.4 90 5.5 41.9 45 11 2.3 15.0 41
10/01/14 09:30 Brad Crawford 7.76 205 11.8 53.2 47 7 2.7 23.0 570
09/03/14 08:35 Eric Palas 8.1 111 16.4 61.5 54 7 2.3 1.0 7300
08/06/14 09:00 Eric Palas 8.1 147 17.9 64.2 60+ 8 1.6 16.0 930
07/09/14 08:40 Eric Palas 8.1 41 17.8 64.0 59 9 0.26 13.0 500
06/04/14 09:05 Eric Palas 8.1 80 15.1 59.2 47 9 1.0 11.0 750
05/07/14 08:50 Eric Palas 8.3 55 9.3 48.7 60+ 11 0.28 11.0 180
04/02/14 09:50 Eric Palas 8.7 85 1.1 34.0 55 10 0.63 8.4 41
11/06/13 09:10 Eric Palas 8.1 48 7.5 45.5 30 9 1.2 7.0 1100 0.17
10/16/13 09:40 Eric Palas 8.3 96 10.5 50.9 60+ 9 2.5 7.0 <0.05
09/04/13 08:30 Eric Palas 8.2 150 14.9 58.8 60+ 8 0.93 3.2 580 <0.05
08/07/13 09:30 Eric Palas 8.2 105 18.5 65.3 21 9 1.1 5.1 700 <0.05
07/10/13 09:50 Brad Crawford 7.79 48 16.9 62.4 60+ 8 0.3 11.0 380 <0.05
06/05/13 10:20 Eric Palas 8.3 <30 12.0 53.6 20 9 0.35 7.2 7300 0.16
05/01/13 08:40 Eric Palas 8.5 87 10.4 50.7 60 11 0.33 9.5 41 <0.05
04/10/13 09:15 Eric Palas 8.2 33 2.9 37.2 7 12 0.56 9.1 400 0.13
Download in CSV format

Yearly Averages for Unnamed Creek, Silver Creek Watershed @ 125th St (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 8.2 (8.3) 102 (<33) 12.4 (15.6) 54.4 (60.1) 46 (53) 8.8 (8.6) 1.68 (0.19) 11.6 (6.5) 624 (376) 0.08 (0.09) 63 (20) 128.28 (22.17) 30.1 (23.58)
2015 Mean 8.3 (8.3) 148 (<33) 14.6 (17.3) 58.2 (63.1) 33 (53) 7.6 (7.2) 3.37 (0.23) 17.4 (6.1) 1549 (442) 63 (20) 128.28 (22.17) 30.1 (23.58)
2014 Mean 8.2 (8.2) 102 (<33) 11.9 (14.6) 53.3 (58.3) 56 (57) 9.0 (8.4) 1.38 (0.18) 12.3 (7.3) 380 (196)
2013 Mean 8.2 (8.2) 74 (<33) 11.7 (13.6) 53.1 (56.5) 44 (46) 9.4 (8.8) 0.91 (0.27) 7.4 (7.6) 573 (960) 0.08 (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).

Download in CSV format

Water Quality Standards

For 52.4% 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 75.0% 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

NameUnnamed Creek, Silver Creek Watershed @ 125th St
CodeUNS-25
CountyClayton
Latitude43.0445
Longitude-91.4311
UTM_X627792.0
UTM_Y476694.0
NotesAdded Apr 2013
HUC_87060004
Sampled byClayton County Soil and Water Conservation District

Sampling Location

Nearby Sampling Locations

← Upstream