McWain Pond Association
Reported by the Lakes Environmental Association
McWain Pond’s surface water chlorophyll (ppb), phosphorus (ppb), and Secchi depth (meters)
data comparison Colored areas represent the long-term range of values, from minimum to
maximum. Area thickness indicates frequency of measurements at that value. Area thickness
increases as more measurements are reported at that value. The vertical black line represents the
long-term average value. The large red dot represents 2023’s average value. The small red dots
represent individual readings taken in 2023.
2023 Water Quality Highlights
The average Secchi disk reading for 2023 was 4.9 meters, which falls into the moderate clarity
range. The average total phosphorus reading of 8.9 ppb falls into the moderate range. The average
deep water phosphorus value was less than 10 ppb above average surface water phosphorus
values, which suggests phosphorus recycling is not problematic. The chlorophyll-a average of 2.9
ppb falls into the moderate range. Long-term trend analysis indicates chlorophyll-a concentrations
in McWain Pond are decreasing, total phosphorus concentrations are stable, and clarity readings
are stable. McWain Pond’s Gloeotrichia echenulata density ranged from 0 through 1 with the highest
density occurring in mid-August.
