From the Decatur County Department of Health
The Decatur County Health Department has received the latest laboratory water sample test results
from Lake McCoy. Total Coliform samples tested at the maximum levels at all test sites collected,
indicating lake wide bacterial colonies.
Coliform bacteria get their name from the Coli culture test, which is a test used to detect these bacteria
in water and other samples. They are a group of rod-shaped microorganisms that are commonly found
in the environment.
Generally, coliform bacteria do not cause disease. But the presence of a high level of coliform bacteria is
usually an indication that other disease-causing organisms may be present in the lake. While they’re not
always harmful, coliform bacteria can cause serious illness if ingested or when they come into contact
with open wounds.
Although water temperatures are still very cold, Environmental Health Specialist Leah Root advises
avoiding swimming in lakes that have coliform bacteria blooms. Coliform bacteria can cause many
health problems, including gastroenteritis, eye infections, and skin rashes. Some people are also allergic
to coliform bacteria.
Coliform bacteria in lakes can come from a variety of sources, including feces, soil, vegetation, and
animal carcasses. They can also be introduced into lakes through stormwater runoff and wastewater
discharge. Coliform bacteria can survive in a wide range of environmental conditions, so they can be
found in both fresh and saltwater.
Other common causes of coliform bacteria in lakes include:
Improperly treated or discharged wastewater
Bacteria blooms
Agricultural runoff
Septic tanks
Animal waste
Human feces
Each of these sources can introduce coliform bacteria into lakes, and these bacteria can survive in a wide
range of environmental conditions.
If you do choose to swim in a lake with coliform bacteria, it’s important to take precautions. Make sure
to shower and wash your clothes immediately after swimming. Also, avoid swallowing any water while
swimming. If you experience any symptoms after swimming in a coliform bacteria-containing lake,
contact your doctor.
Swimming in contaminated water can lead to a variety of health problems, including gastroenteritis, eye
infections, and allergic reactions. It’s best to avoid swimming in Coliform bacteria-containing lakes, but if
you do choose to swim, take precautions by showering and washing your clothes immediately after swimming, and avoid swallowing any water. If you experience any symptoms after swimming in a
coliform bacteria-containing lake, contact your doctor.