Roberts Creek @ 206th St/B65 (St. Olaf) [ROB-30]

Name	Roberts Creek @ 206th St/B65 (St. Olaf)
Code	ROB-30
County	Clayton
Latitude	42.9304
Longitude	-91.3855
Notes	No Longer Active - Sampled May 2011 Only
HUC_8	7060004
Sampled by	Northeast Iowa Resource Conservation and Development

Sampling Location

Yearly Averages for Roberts Creek @ 206th St/B65 (St. Olaf) [ROB-30] 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
All Years	8.8 (8.3)	<33 (<33)	12.8 (15.6)	55.0 (60.0)	55 (52)	12.0 (8.6)	0.16 (0.21)	10.0 (6.7)	31 (372)	<0.05 (0.09)
2011 Mean	8.8 (8.3)	<33 (<33)	12.8 (15.9)	55.0 (60.7)	55 (58)	12.0 (9.0)	0.16 (0.1)	10.0 (6.4)	31 (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 0.0% 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 Roberts Creek @ 206th St/B65 (St. Olaf) [ROB-30]

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
05/04/11	20:10		8.8	<33	12.8	55.0	55	12	0.16	10.0	31	<0.05

Nearby Sampling Locations