Under the Natural Resources and Environmental
Protection Act (Public Act 451 of 1994, Part 309, Inland Lake
Improvements), lake board membership includes representatives
from the following entities: Bloomfield Township, two
designees; Oakland County Board of Commissioners; Oakland
County Water Resource Commissioner’s Office; and a riparian
land owner, appointed by the lake board, who owns land
abutting the lake. Lake improvement boards have been
established to address relevant lake improvement issues,
including the oversight of aquatic weed control programs,
nuisance control, water quality improvements and other
For more information regarding the Township’s eight
established lake boards, engineering studies or maps of each
lake board area, please select a link below.
As of March 1, 2005, Michigan
legislative amendments have made new changes to the
administration structure of lake improvement boards. For more
information, please see the
Natural Resources and
Environmental Protection Act - Public Act 451 of 1994, Part
For more information, please visit the
Oakland County Lake Improvement Board website for access
to the Lake Improvement Board manual.
Water Quality Information
commonly classified as oligotrophic, mesotrophic, or eutrophic.
Oligotrophic lakes are generally deep and clear. They have
little aquatic plant growth and have high levels of dissolved
oxygen in the bottom waters of the lake even during late
summer. These lakes can support cold water fish species such
as trout or steelhead.
Mesotrophic lakes are characterized by intermediate aquatic
plant growth. This causes some organic sediment to fall to the
bottom of the lake. Thus, dissolved oxygen levels are
typically lower near the bottom of this type of lake. The
water is clear and can support moderately heavy fishing
pressure. Depending on the depth of the lake it may support
warm or cold water fish species.
Eutrophic lakes are usually shallow and turbid and support
abundant plant growth. In most eutrophic lakes the bottom
waters are cool and contain little or no dissolved oxygen.
These lakes support only warm water fish species including
bass and pike.
Under natural conditions, most lakes will evolve into
eutrophic lakes. They gradually fill in with sediment and
organic matter carried into the lake from its surrounding
watershed (area of land drained by a river or lake system). As
the lake becomes shallower the process of lake aging or
eutrophication will accelerate. Over time, the lake will age
into a marsh or swamp.
The eutrophication process can be further enhanced by the
addition of unnatural amounts of sediment and nutrients. This
unnatural addition is usually the result of human activities
within the watershed and is called cultural eutrophication.
This issue can be addressed by the identification and
elimination of sources of nutrient and sediment loading.
Water Quality Parameters
Typical water quality monitoring includes the assessment of
the physical, biological, and chemical characteristics of the
A physical lake survey involves assessing the apparent
condition of the lake. This can include monitoring the
temperature, depth, shoreline disruption of a lake. These
factors can limit the amount and species of the fish
population. In addition, a generalization of surrounding land
uses can help to identify sediment and nutrient sources.
Biological lake assessment can tell us a great deal about the
quality of water in a lake or river. Typically, benthic
macroinvertebrate (bottom dwelling large invertebrates)
populations are great indicators for water quality. The number
and type of organism found in a water body is directly related
to the quality of that lakes water. A comprehensive chemical
assessment is important when considering the overall quality
of an aquatic environment. Typically, turbidity, nitrate, and
dissolved oxygen levels have the greatest impact on water
Turbidity is a measure of the amount of particulate matter
that is suspended in water. Water that has high turbidity
appears cloudy or opaque. High turbidity can cause increased
water temperatures because suspended particles absorb more
heat and can also reduce the amount of light penetrating the
Nitrate is a major
ingredient of fertilizer and is necessary for crop production.
When it rains, varying nitrate amounts wash from farmland into
nearby waterways. Nitrates also get into waterways from lawn
fertilizer run-off, leaking septic tanks and cesspools, manure
from farm livestock, animal wastes (including fish and birds),
and discharges from car exhausts. Nitrates stimulate the
growth of plankton and aquatic weeds can be beneficial in the
lake. However, if algae grow too wildly, oxygen levels will be
reduced and fish will die.
Dissolved oxygen (DO) levels can have wide-ranging effects on
the health of a water body. DO is a very important indicator
of a water body's ability to support aquatic life. Fish
"breathe" by absorbing dissolved oxygen through their gills.
Oxygen enters the water by absorption directly from the
atmosphere or by aquatic plant and algae photosynthesis.
Oxygen is removed from the water by respiration and
decomposition of organic matter. The amount of DO in water
depends on several factors, including temperature (the colder
the water, the more oxygen can be dissolved); the volume and
velocity of water flowing in the water body; and the amount of
organisms using oxygen for respiration. The amount of oxygen
dissolved in water is expressed as a concentration, in
milligrams per liter (mg/l) of water. Human activities that
affect DO levels include the removal of riparian vegetation,
runoff from roads, and sewage discharge.
For information about how you can become a better steward for
the environment, please visit our
riparian information webpage.
Please contact the Bloomfield Township Clerk’s office at
248.433.7702 or the Engineering
and Environmental Services Department at
248.594.2800 if you have questions about the material
Updated March 2011