Water Quality Characteristics

Years monitored: 2007 – 2012 (RMB database only)

*RMB note: Before 2011, the reporting limit for total phosphorus was 5 ug/L. Starting in 2011, the reporting limit is 3 ug/L.

Parameters	Primary Site 203 (Primary)	Site 206	Site 207
Total Phosphorus Mean (ug/L):	11.6	9.3	12.2
Total Phosphorus Min (ug/L):	7.0	7.0	9.0
Total Phosphorus Max (ug/L):	20.0	14.0	18.0
Number of Observations:	28	15	15

Chlorophyll-a Mean (ug/L):	4.2	2.5	5.0
Chlorophyll-a Min (ug/L):	1.0	1.0	1.0
Chlorophyll-a Max (ug/L):	8.0	4.0	20.0
Number of Observations:	27	15	15

Secchi Depth Mean (ft):	13.6	15.0	12.7
Secchi Depth Min (ft):	9.0	10.0	7.0
Secchi Depth Max (ft):	19.0	19.5	17.5
Number of Observations:	26	15	14

Long-term Trends
Primary site only. Recommend minimum of 8-10 years of data with 4+ readings per season. Minimum confidence accepted by MPCA is 90%

Total Phosphorus:	No significant trend exists.
Chlorophyll-a:	No significant trend exists.
Secchi Depth:	No significant trend exists.
Trophic State Index:	No significant trend exists.

EcoRegion Comparisons
(Primary site only. Comparisons are based on interquartile range, 25th – 75th percentile, for ecoregion reference lakes)

Total Phosphorus:	Below Expected Range
Chlorophyll-a:	Within Expected Range
Secchi Depth:	Within Expected Range