Unnamed Creek, Silver Creek Watershed @ 125th St [UNS-25]

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

Sampling Location

Yearly Averages for Unnamed Creek, Silver Creek Watershed @ 125th St [UNS-25] 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 8.3 (8.3) 102 (<33) 12.4 (15.6) 54.3 (60.0) 43 (52) 8.8 (8.6) 1.37 (0.21) 11.1 (6.7) 567 (372) 0.08 (0.09) 36 (29) 108.59 (27.87) 26.24 (22.17)
2019 Mean 8.3 (8.4) 32 (29) 0.59 (0.5) 8.0 (8.5) 839 (1160) 19 (25) 58.54 (34.3) 20.57 (20.61)
2018 Mean 1.24 (0.24) 13.2 (8.8) 218 (269) 27 (16) 176.88 (34.33) 30.28 (21.18)
2017 Mean 8.3 (8.3) 12.3 (13.2) 54.2 (55.8) 44 (35) 1.3 (0.51) 11.0 (8.8) 666 (298) 42 (79) 86.04 (34.35) 25.67 (19.7)
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)

*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 46.3% 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 70.0% 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).

Download in CSV format

Monthly Water Sampling Data for Unnamed Creek, Silver Creek Watershed @ 125th St [UNS-25]

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
10/01/19 00:00 Eric Palas 7.5 10 0.46 4.9 19608 23.1 13.3
09/10/19 00:00 Eric Palas 8.4 36 0.96 7.7 24196 37.6 85.0 24.5
08/06/19 00:00 Eric Palas 8.4 40 0.67 7.0 2613 20.5 69.6 17.4
07/08/19 00:00 Eric Palas 8.6 36 0.29 9.2 448 9.5 47.3 21.5
06/04/19 00:00 Eric Palas 8.6 34 0.1 10.0 85 6 32.2 18.9
05/07/19 00:00 Eric Palas 8.4 46 0.34 8.2 98 11.2 49.7 22.0
04/02/19 00:00 Eric Palas 8.4 25 1.31 9.0 63 29.6 102.9 26.4
09/18/18 00:00 Eric Palas 0.64 10.1 395 8.8 73.7 27.2
08/14/18 00:00 Eric Palas 1.76 14.7 169 60 268.3 39.3
07/11/18 00:00 Eric Palas 0.11 9.2 2014 48 120.1 28.6
06/12/18 00:00 Eric Palas 11.3 144 19.5 47.0 17.5
05/07/18 00:00 Eric Palas 1.02 10.8 275 5 71.5 28.3
04/10/18 00:00 Eric Palas 2.67 23.1 20 22 480.7 40.8
11/01/17 00:00 Eric Palas 9.0 3.0 37.4 45 2.27 15.7 384 58 154.3 38.9
09/26/17 00:00 Eric Palas 7.9 20.2 68.4 15 1.7 3.5 2046 91.2 56.1 22.7
09/05/17 00:00 Eric Palas 8.5 14.3 57.7 32 2.76 19.3 1808 31.2 175.1 36.5
07/25/17 00:00 Eric Palas 8.3 15.2 59.4 51 0.46 9.8 906 11.5 58.6 23.0
06/27/17 00:00 Eric Palas 8.1 13.4 56.1 45 9.6 845 80 74.8 22.4
05/30/17 00:00 Eric Palas 8.1 10.8 51.4 45 0.32 8.9 487 16.4 38.7 16.8
04/25/17 00:00 Eric Palas 8.0 9.4 48.9 60+ 0.3 10.1 110 5.2 44.7 19.4
10/27/15 14:00 Eric Palas 8.3 221 8.3 46.9 35 9 4.54 27.9 161 222.1 46.8
09/29/15 15:00 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 14:25 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 13:30 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 13:45 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 15:05 Eric Palas 8.4 90 5.5 41.9 45 11 2.3 15.0 41
10/01/14 14:30 Brad Crawford 7.76 205 11.8 53.2 47 7 2.7 23.0 570
09/03/14 13:35 Eric Palas 8.1 111 16.4 61.5 54 7 2.3 1.0 7300
08/06/14 14:00 Eric Palas 8.1 147 17.9 64.2 60+ 8 1.6 16.0 930
07/09/14 13:40 Eric Palas 8.1 41 17.8 64.0 59 9 0.26 13.0 500
06/04/14 14:05 Eric Palas 8.1 80 15.1 59.2 47 9 1.0 11.0 750
05/07/14 13:50 Eric Palas 8.3 55 9.3 48.7 60+ 11 0.28 11.0 180
04/02/14 14:50 Eric Palas 8.7 85 1.1 34.0 55 10 0.63 8.4 41
11/06/13 15:10 Eric Palas 8.1 48 7.5 45.5 30 9 1.2 7.0 1100 0.17
10/16/13 14:40 Eric Palas 8.3 96 10.5 50.9 60+ 9 2.5 7.0 <0.05
09/04/13 13:30 Eric Palas 8.2 150 14.9 58.8 60+ 8 0.93 3.2 580 <0.05
08/07/13 14:30 Eric Palas 8.2 105 18.5 65.3 21 9 1.1 5.1 700 <0.05
07/10/13 14:50 Brad Crawford 7.79 48 16.9 62.4 60+ 8 0.3 11.0 380 <0.05
06/05/13 15:20 Eric Palas 8.3 <30 12.0 53.6 20 9 0.35 7.2 7300 0.16
05/01/13 13:40 Eric Palas 8.5 87 10.4 50.7 60 11 0.33 9.5 41 <0.05
04/10/13 14:15 Eric Palas 8.2 33 2.9 37.2 7 12 0.56 9.1 400 0.13
  • 10/01/2019: heavy rain
  • 09/26/2017: 1.6" Rain
  • 06/30/2015: 0.6 inches rain on 6/29 at Monona
  • 10/01/2014: low flow
  • 04/02/2014: ice still present
  • 09/04/2013: Low Flow
  • 04/10/2013: Turbid

Nearby Sampling Locations

← Upstream

    Downstream →