Monthly Water Sampling Results for Steeles Branch (2) @ Highway 3

Sample Date by P mg/L N mg/L E. Coli MPN/100mL Total Suspended Solids mg/L
12/05/12 00:00 0.06 12.0 160 1
10/15/12 00:00 0.46 11.0 2100 56
09/12/12 11:15 0.08 10.0 500 4
07/31/12 11:30 0.08 11.0 3900
05/31/12 15:50 0.09 14.0 6900 8
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Yearly Averages for Steeles Branch (2) @ Highway 3 (with comparison to all sites in the watershed)

P mg/L N mg/L E. Coli MPN/100mL Total Suspended Solids mg/L
All Years 0.15 (0.19) 11.6 (6.5) 1352 (376) 17 (20)
2012 Mean 0.15 (0.17) 11.6 (4.8) 1352 (374) 17 (16)

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 80.0% 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 80.0% 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

NameSteeles Branch (2) @ Highway 3
CodeSTE-02
CountyDelaware
Latitude42.6307831
Longitude-91.3656387
UTM_X634010.0
UTM_Y4721110.0
NotesPart of Delaware SWCD project
Sampled byDelaware County Soil and Water Conservation District

Sampling Location

Nearby Sampling Locations

← Upstream