HOW
TO MAINTAIN YOUR SEPTIC SYSTEM
Septic
Systems are a very simple way to treat household wastewater and are
easy to operate and maintain. Although homeowners must take a more active
role in maintaining septic systems, once they learn how their systems
work, it is easy for them to appreciate the importance of a few sound
operation and maintenance practices.
How
Septic Systems Work
There
are two Main parts to the basic septic system: The septic tank and the
drainfield.

The
Septic Tank
Household
wastewater first flows into the septic tank where it should stay for
at least a day. In the tank, heavy solids in the wastewater settle to
the bottom forming a layer of sludge, and grease and light solids float
to the top forming a layer of scum (refer to the graphic on this page).
The
sludge and scum remain in the tank where naturally occurring bacteria
work to break them down. The bacteria cannot completely break down all
of the sludge and scum, however, and this is why septic tanks need to
be pumped periodically.
The
separated wastewater in the middle layer of the tank is pushed out into
the drainfield as more wastewater enters the septic tank from the house.
If too much water is flushed into the septic tank in a short period
of time, the wastewater flows out of the tank before it has had time
to separate. This can happen on days when water use is unusually high
(laundry day, for example), or more often if the septic tank is too
small for the needs of the household.

The
Drainfield
When
wastewater leaves a septic tank too soon, solids can be carried with
it to the drainfield. Drainfields provide additional treatment for the
wastewater by allowing it to trickle from a series of perforated pipes,
through a layer of gravel, and down through the soil. The soil acts
as a natural filter and contains organisms that help treat the waste.
Solids damage the drainfield by clogging the small holes in the drainfield
pipes and the surrounding gravel, and exess water strains the system
unnecesarily.
How
to Care for Your System
Septic
system maintenance is often compared to automobile maintenance because
only a little effort on a regular basis can save a lot of money and
significantly prolong the life of the system.
Sound
septic system operation and maintenance practices include conserving
water, being careful that nothing harmful is disposed of through the
system, and having the system inspected and pumped regularly (every
3-5 years).
By
educating everyone in your household about what is and what isn't good
for septic systems, they can begin to develop good maintenance habits.
Use
Water Wisely
Water
conservation is very important for septic systems because continual
saturation of the soil in the drainfield can affect the quality of the
soil and its ability to naturally remove toxins, bacteria, viruses,
and other pollutants from the wastewater.
The
most effective way to conserve water around the house is to first take
stock of how it is being wasted. Immediately repair any leaking faucets
or running toilets, and use washing machines and dishwashers only when
full.
In
a typical household, most of the water used indoors is used in the bathroom,
and there are a lot of little things that can be done to conserve water
there.
For
example, try to avoid letting water run while washing hands and brushing
teeth. Avoid taking long showers and install water-saving features in
faucets and shower heads. These devices can reduce water use by up to
50 percent. Low-flush toilets use one to two gallons per flush compared
to the three to five gallons used by conventional toilets. Even using
a toilet dam or putting a container filled with rocks in the toilet
tank can reduce water use by 25 percent.
It
is also important to avoid overtaxing your system by using a lot of
water in a short time period. or by allowing too much outside water
to reach the drainfield. Try to space out activities requiring heavy
water use (like laundry) over several days. Also, divert roof drains,
surface water and sump pumps away from the drainfield.
Know
What Not to Flush
What
you put into your septic system greatly affects its ability to do its
job. As a general rule of thumb, do not dispose of anything in your
septic system that can just as easily be put in the trash. Remember
that your system is not designed to be a garbage disposal,and that solids
build up in the septic tank and eventually need to be pumped out.
In
the kitchen, avoid washing food scraps, coffee grinds and other food
items down the drain. Grease and cooking oils contirubute to the layer
of scum in the tank and also should not be put down the drain. Garbage
disposals can increase the amount of solids in the tank up to 50 percent
and are not recommended for use with septic systems.
The
same common-sense approach used in the kitchen should be used in the
bathroom. Don't use the toilet to dispose of plastics, paper towels,
tampons, disposable diapers, condoms, kitty litter, etc. The only things
that should be flushed down the toilet are wastewater and toilet paper.
Avoid
Hazardous Chemicals
To
avoid disrupting or permanently damaging your septic system, do not
use it to dispose of hazardous household chemicals. Even small amounts
of paints, varnishes, thinners, waste oil, photographic solutions, pesticides,
and other organic chemicals can destroy helpful bacteria and the biological
digestion taking place within your system. These chemicals also pollute
the groundwater.
Some
septic system additives that claim to help or clean your system also
contain hazardous chemicals and should be avoided.
Household
cleaners, such as bleach, disinfectants, and drain and toilet bowl cleaners
should be used in moderation and only in accordance with products labels.
Overuse of these products can harm your system. It makes sense to try
to keep all toxic and hazardous chemicals out of your septic tank system
when possible.
To
help prevent groundwater pollution, be sure to dispose of leftover hazardous
chemical by taking them to an approved hazardous waste collection center.
For locations and more information contact your local health department.
Protect
Your System
Finally,
it is important to protect your septic system from potential damage.
Don't
plant anything but grass near your septic system - roots from shrubs
and trees can cause damage - don't allow anyone to drive or operate
heavy machinery over any part of the system. Also, don't build anything
of the drainfield. Grass is the most appropriate cover for the drainfield.