Monthly Water Sampling Results for Unnamed Creek, Silver Creek Watershed @ Dolphin Ave Download in CSV format

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
06/27/17 00:00 0.9 12033 39.6 170.6 22.7
05/30/17 00:00 1.38 4.2 120 8 51.7 4.1
04/25/17 00:00 1.13 10.1 52 19.2 63.9 25.7
10/27/15 14:30 Eric Palas
09/29/15 15:15 Eric Palas
08/25/15 14:15 Eric Palas
07/28/15 13:15 Eric Palas 8.1 71 23.2 73.8 45 5 5.32 4.9 292 2 253.3 56.4
06/30/15 14:00 Eric Palas 8.1 71 16.4 61.5 39 7 1.21 24.3 404 19.5 90.8 24.3
11/05/14 15:00 Eric Palas
10/01/14 14:40 Brad Crawford
09/03/14 13:50 Eric Palas
08/06/14 14:15 Eric Palas
07/09/14 14:00 Eric Palas 8.1 63 20.2 68.4 51 8 1.1 12.0 16000
06/04/14 14:30 Eric Palas 8.1 160 18.6 65.5 47 6 3.6 11.0 5500
05/07/14 14:05 Eric Palas 8.3 80 11.1 52.0 60+ 10 1.3 12.0 24000
04/02/14 15:05 Eric Palas 8.7 147 1.3 34.3 35 11 3.0 13.0 24000+
11/06/13 15:30 Eric Palas
10/16/13 14:30 Eric Palas
09/04/13 13:45 Eric Palas
08/07/13 14:15 Eric Palas 8.3 30 15.7 60.3 15 9 0.27 9.6 460 <0.05
07/10/13 15:10 Brad Crawford 8.13 48 19.1 66.4 51 7 0.8 13.0 680 0.99
06/05/13 16:40 Eric Palas 8.2 48 12.7 54.9 10 8 0.8 9.1 3900 0.4
05/01/13 14:00 Eric Palas 8.4 150 12.4 54.3 14 10 3.3 7.9 660 2.3
04/10/13 13:50 Eric Palas 8.2 33 3.4 38.1 3 12 2.0 7.4 0.75
  • 10/27/2015: Dry stream segment
  • 09/29/2015: dry stream segment
  • 08/25/2015: No streamflow
  • 06/30/2015: 0.6 inches rain on 6/29 at Monona
  • 11/05/2014: no flow
  • 10/01/2014: dry, not sampled
  • 09/03/2014: dry stream segment
  • 08/06/2014: Stream segment dry
  • 11/06/2013: Insufficient flow for sampling
  • 10/16/2013: Stream Dry
  • 09/04/2013: No Flow
  • 08/07/2013: No flow from east unnamed tributary. Flow sampled from north tributary. Sampled west of bridge.
  • 04/10/2013: Turbid

Yearly Averages for Unnamed Creek, Silver Creek Watershed @ Dolphin Ave (with comparison to all sites in the watershed) Download in CSV format

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) 82 (<33) 14.0 (15.6) 57.2 (60.1) 35 (53) 8.5 (8.6) 1.94 (0.19) 10.0 (6.5) 1595 (368) 0.9 (0.09) 18 (19) 126.06 (22.01) 26.64 (22.15)
2017 Mean 1.26 (0.16) 5.1 (8.8) 422 (183) 22 (16) 95.4 (21.33) 17.5 (15.88)
2015 Mean 8.1 (8.3) 71 (<33) 19.8 (17.3) 67.7 (63.1) 42 (53) 6.0 (7.2) 3.27 (0.23) 14.6 (6.1) 343 (442) 11 (20) 172.05 (22.17) 40.35 (23.58)
2014 Mean 8.3 (8.2) 113 (<33) 12.8 (14.6) 55.1 (58.3) 51 (57) 8.8 (8.4) 2.25 (0.18) 12.0 (7.3) 15704 (196)
2013 Mean 8.2 (8.2) 62 (<33) 12.7 (13.6) 54.8 (56.5) 19 (46) 9.2 (8.8) 1.43 (0.27) 9.4 (7.6) 947 (960) 0.9 (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).

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 84.6% 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).

Site Information

NameUnnamed Creek, Silver Creek Watershed @ Dolphin Ave
CodeUNS-15
CountyClayton
Latitude43.0342
Longitude-91.4587
UTM_X625563.0
UTM_Y476576.0
NotesAdded Apr 2013
HUC_87060004
Sampled byClayton County Soil and Water Conservation District

Sampling Location

Nearby Sampling Locations

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