Lake Henry

Lake Henry is a small, clear, sandy-bottomed 'ridge' type lake connected to the north end of Lake June by a canal that runs under Lake June Road.  Water quality, based on Lakewatch data, in Lake Henry is good for a lake of this type, though phosphorus levels are slightly higher than in a typical 'ridge' lake.  Phosphorus levels range from 9 to 33 ppb (parts per billion) and average 18 ppb.  Nitrogen levels are low, ranging from 320 to 750 ppb, averaging 557 ppb.  Algae populations increase and decrease as nutrient levels increase and decrease and are measured by the amount of chlorophyll concentration in the water.   Chlorophyll concentrations in Lake Henry range from 3 to 26 ppb and average 11 ppb.  These levels might increase over time if nitrogen levels in the lake increase.  The presence of algae reduces water clarity, which is measured by the depth to which a standardized 'secchi' disc can be seen when lowered into the water.  Secchi depths range from a so-so 3.5 feet to a good 11.5 feet, averaging 6.4 feet.  Water quality declined somewhat through 2001, but quality improved in part of the lake during 2001.  Of the three sample sites in the lake, two sites improved and one site remained lower in water quality in 2002.  The three sites were approximately equal in 2003, though phosphorus and chlorophyll concentrations were up last year.  Click here to view water quality data by year.

Boat access to Lake Henry is through a canal on the northeast side of Lake June that runs under Lake June Road.  There are two boat ramps on Lake June, both in the lobe on the northeast end of the lake.  One ramp is on the north side of this lobe, located at Bishop Park.  The other ramp is on the south side of this lobe, located at the Lake June Point park.

Lakewatch water quality data through 1999