20
THE KANSAS LIFELINE
July 2018
Local health departments, healthcare
providers and veterinarians will be
directly contacted and informed of
the watch. Public Water Supply
Systems that use the water from the
affected waterbody, including those
downstream, will also be notified.
The recommendation will include that
pets should be kept away from the
water.
When a Public Health Warning is
declared, the same contacts will be
made as was done with the Public
Health Watch, but will also include a
media information release. If the
concentration of microcystin does not
exceed 2,000 µg/l or if cyanobacteria
cell counts does not exceed 10,000,000
cells per milliliter, it will be
recommended that restrictions to direct
contact with the affected body of water
be implemented. If the concentration of
microcystin does exceed 2,000 µg/l or
if cyanobacteria cell counts exceed
10,000,000 cells per milliliter, it will be
recommended to the owner of the
waterbody that all recreation be
prohibited and that adjacent areas such
as campgrounds and picnic facilities be
closed.
Sampling of waterbodies with a
declared Watch or Warning will
continue on a regular basis and in a
consistent manner until water samples
show microcystin levels at less than 4
µg/l and cyanobacteria cells at less
than 80,000 cells per milliliter. When
levels fall below these levels, the
Watch or Warning will be rescinded.
Because of the impact of
cyanobacteria on water quality and
public health, and because a
reduction of the levels of the
nutrients in the waterbodies will
likely take many years, if ever, to
achieve, there is a desire to find
other ways to control future
cyanobacteria blooms. One of
these ideas that is being tested is
the use of ultrasound to control
the life cycle of cyanobacteria.
Milford Lake is the largest
federal reservoir in Kansas.
Construction of the dam
commenced in 1962 and
impoundment of water started
in 1967. It also is one of the
waterbodies that has had a
HAB every year since 2011,
likely related to its age and
increasing levels of
When microcystin concen
trations or
cyanobacteria counts r
each the Closure
criteria, Lake Closur
e signs will be posted t
o
prohibit aquatic and near
-shore activities.