If your Aerated Wastewater Treatment System suddenly starts beeping, flashing or showing a warning light, it can be unsettling.
Most homeowners know the alarm means something needs attention, but they may not know what the warning is actually telling them.
Is the tank full? Has the pump failed? Has the blower stopped? Is the system overflowing? Can you still use the toilet? Do you need to call a technician immediately?
The answer depends on the type of alarm and the reason it has activated.
An AWTS alarm is designed to alert you when something inside the wastewater treatment system is not operating as expected. It does not always mean there is a major failure, but it should never be ignored.
Understanding the common reasons for AWTS alarms can help you respond calmly, reduce the risk of overflow and know when it is time to contact Eco Septic or your authorised service technician.
What Is an AWTS Alarm?
An Aerated Wastewater Treatment System uses electrical and mechanical components to treat and distribute wastewater.
Depending on the system, these may include:
- an air blower
- irrigation pump
- float switches
- control panel
- alarm system
- timers
- disinfection equipment
- electrical controls
The alarm system monitors certain operating conditions.
If the system detects a problem, it may activate:
- a red warning light
- an audible buzzer
- a flashing indicator
- a high-water alarm
- a blower fault warning
- a pump fault warning
The exact alarm configuration depends on the wastewater system installed at your property.
The purpose is simple: to tell you the system needs attention before a small issue becomes a larger one.
Why Does an AWTS Need an Alarm?
An AWTS quietly works in the background every day.
Most of the time, homeowners do not need to think about what is happening inside the tank.
Wastewater enters the system, treatment occurs, treated wastewater is pumped to the irrigation area and the cycle continues.
Because much of the system is underground, a problem may not be immediately visible.
An alarm provides an early warning.
Without one, a failed pump or rising water level could continue unnoticed until wastewater backs up into the house or surfaces around the tank.
The alarm is therefore one of the most important safety and maintenance features on the system.
What Does a High-Water Alarm Mean?
A high-water alarm is one of the most common AWTS warnings.
It usually means the water level inside part of the system has risen above its normal operating range.
This can happen for several reasons.
Possible causes include:
- excessive household water use
- pump failure
- blocked irrigation lines
- saturated ground
- electrical faults
- float switch problems
- stormwater entering the system
- power outages
- damaged pump components
A high-water alarm does not automatically mean wastewater is about to overflow.
However, it means the system is not moving water through at its normal rate.
What Should You Do If the High-Water Alarm Activates?
The first step is to reduce water use.
Avoid high-volume activities such as:
- washing machines
- dishwashers
- long showers
- baths
- unnecessary toilet flushing
Continue using essential facilities carefully.
The idea is to reduce the amount of new wastewater entering the system while it is already holding more water than usual.
If the alarm clears after a short period, the system may simply have been temporarily overloaded.
If it remains active, contact Eco Septic or your wastewater service technician.
Can Too Much Water Trigger the Alarm?
Yes.
An AWTS is designed around an expected daily wastewater load.
If a household suddenly uses much more water than normal, the system may temporarily struggle to keep up.
This can happen when:
- guests stay over
- several loads of washing are run together
- everyone showers in a short period
- a bath is filled and emptied
- the dishwasher is used repeatedly
- a leaking toilet runs continuously
This is sometimes referred to as hydraulic overloading.
The system may need time to pump and process the additional wastewater.
Can Heavy Rain Trigger an AWTS Alarm?
Heavy rain can contribute to alarm conditions.
The problem is usually not rain falling directly into the tank, assuming the system is correctly installed and sealed.
The greater issue is saturated soil.
If the irrigation or land application area is already waterlogged, treated wastewater may not disperse as effectively.
This can cause water levels inside the system to rise.
Heavy rain can also expose other problems, such as:
- poor site drainage
- damaged lids or seals
- stormwater flowing toward the tank
- blocked irrigation
- high groundwater
- pump issues
If an alarm occurs during or after severe weather, reduce water use and monitor the system.
Persistent alarms should be investigated.
What Does a Blower Alarm Mean?
The air blower is a critical part of an AWTS.
It introduces oxygen into the treatment process, allowing aerobic bacteria to break down organic matter.
If the blower stops operating, the treatment process can be affected.
A blower alarm may indicate:
- power loss
- blower failure
- electrical fault
- damaged wiring
- internal component failure
- a tripped circuit
You may notice the system is unusually quiet because the normal low humming sound has stopped.
If the blower is not running, do not dismantle it yourself.
Contact your service technician.
Why Is the Air Blower So Important?
Aerobic bacteria depend on oxygen.
The blower continuously introduces air into the treatment chamber.
Without sufficient oxygen, the biological treatment process can become less effective.
Over time, this may contribute to:
- reduced treatment quality
- unpleasant odours
- poor biological activity
- increased solids
- abnormal system performance
A short interruption does not necessarily mean the entire system has failed, but a non-operational blower should be repaired promptly.
What Does a Pump Alarm Mean?
The irrigation or effluent pump moves treated wastewater from the system to the approved irrigation or land application area.
If the pump fails, water may continue entering the system but cannot leave at the normal rate.
This can lead to rising water levels and eventually trigger a high-water alarm.
Possible causes include:
- pump failure
- blocked pipework
- electrical fault
- damaged float switch
- blocked irrigation
- tripped power supply
- mechanical wear
A pump problem should be assessed by a qualified technician.
Can a Power Outage Cause the Alarm to Sound?
Yes.
During a power outage, electrical components such as the blower and pump stop operating.
Wastewater may continue entering the system if people are still using toilets, showers and sinks.
When power returns, the system may detect a high water level.
The alarm can remain active while the pump catches up.
In some cases, the alarm will clear after the system has had time to recover.
If it does not, contact your service provider.
What Should You Do After a Power Outage?
Once electricity returns:
Listen for the blower.
Check the control panel.
Reduce water use temporarily.
Allow the pump time to lower the water level.
Inspect the irrigation area for unusual pooling.
Contact Eco Septic if the alarm remains active.
Do not repeatedly switch the system off and on in an attempt to reset it.
Can a Blocked Irrigation System Trigger an Alarm?
Yes.
If treated wastewater cannot move through the irrigation system, pressure and water levels may increase.
Possible irrigation problems include:
- blocked sprinkler heads
- damaged pipework
- crushed irrigation lines
- closed valves
- root intrusion
- saturated ground
- pump faults
The problem may be outside the treatment tank itself.
This is why a technician often needs to inspect both the AWTS and the irrigation area.
What Does It Mean If the Alarm Comes and Goes?
An intermittent alarm can indicate a problem that only occurs under certain conditions.
For example:
- water levels may rise during peak household use
- the pump may be operating inconsistently
- a float switch may be sticking
- saturated ground may temporarily slow irrigation
- an electrical connection may be unreliable
An alarm that repeatedly activates and then clears should still be investigated.
It is better to identify the cause early.
Can a Faulty Float Switch Cause an Alarm?
Yes.
Float switches help control pumps and monitor water levels.
They move as the water level changes.
A float can become:
- stuck
- damaged
- obstructed
- disconnected
- worn
If a float does not operate correctly, the pump may not activate when expected.
This can result in rising water levels and alarm activation.
Float problems are usually straightforward for a technician to diagnose.
Can You Silence the Alarm?
Many AWTS control panels allow the audible buzzer to be muted temporarily.
This can be useful, particularly if the alarm activates during the night.
However, silencing the buzzer does not fix the problem.
The warning light may remain active until the fault is resolved.
Never permanently disconnect an alarm simply because it is inconvenient.
The alarm is there to protect the wastewater system and your property.
Should You Reset the System Yourself?
Homeowners should avoid repeatedly resetting, switching or tampering with wastewater control equipment unless instructed by the manufacturer or service technician.
A reset may temporarily stop the alarm without correcting the cause.
This can hide the warning while the underlying problem continues.
It is generally safer to:
- reduce water use
- check whether the property has power
- check for obvious external problems
- contact your service provider if the alarm persists
Can You Keep Using the Toilet When the Alarm Is On?
In most cases, essential toilet use can continue carefully.
However, you should reduce unnecessary water use until you know why the alarm has activated.
Avoid:
- multiple washing loads
- long showers
- baths
- running taps unnecessarily
- dishwasher cycles
If wastewater begins backing up inside the house, stop using water immediately and contact your wastewater service provider.
What If Wastewater Starts Backing Up?
Wastewater backing up into toilets, showers or drains is more serious than an alarm alone.
This may indicate the system is full, blocked or unable to pump.
Stop household water use immediately.
Do not continue flushing toilets or running appliances.
Keep children and pets away from any wastewater.
Contact Eco Septic or your service technician urgently.
What If There Is Water Pooling Around the Tank?
Pooling around the treatment system can have several possible causes.
It may be:
- rainwater
- irrigation water
- treated wastewater
- groundwater
- a leaking pipe
- an overflowing system
Do not assume the water is clean.
Avoid contact.
If the pooling appears connected to the wastewater system, arrange an inspection.
What If the Irrigation Area Is Very Wet?
The irrigation area may become wet during periods of heavy use or prolonged rainfall.
However, persistent pooling should not be considered normal.
Signs of a possible problem include:
- standing water
- sewage odours
- irrigation operating continuously
- soggy ground long after rain stops
- unusually lush grass in one concentrated area
- water surfacing near pipes
If these symptoms appear with an active alarm, the system should be checked.
Can Odours Be Related to an Alarm?
Yes.
Odours can sometimes indicate that the biological treatment process is not operating normally.
Possible causes include:
- blower failure
- reduced aeration
- overloaded system
- excessive sludge
- poor ventilation
- hydraulic overload
- treatment imbalance
Odours alone do not identify the exact fault.
However, odours combined with an alarm should be taken seriously.
What If the Alarm Sounds After a Service?
An alarm shortly after servicing may be related to maintenance work, system restart or an unrelated fault.
If it does not clear within a reasonable period, contact the company that serviced the system.
Do not assume it is normal simply because a technician was recently onsite.
Could the Alarm Itself Be Faulty?
Yes.
Like any electrical component, alarm systems can fail.
A faulty alarm may:
- sound when there is no problem
- fail to sound when there is a problem
- display an incorrect warning
- activate intermittently
This is one reason the alarm system should be tested as part of routine servicing.
Why Regular Servicing Matters
Routine servicing helps identify potential faults before they trigger an emergency alarm.
A qualified technician may check:
- air blower operation
- pump performance
- water levels
- float switches
- alarm system
- electrical controls
- treatment quality
- irrigation system
- sludge levels
- pipework
A system that is serviced regularly is far less likely to develop unnoticed faults.
Do Not Open the Tank Yourself
Never open or enter a wastewater treatment tank to investigate an alarm.
Wastewater tanks contain:
- harmful bacteria
- hazardous gases
- confined spaces
- electrical components
- moving equipment
Internal inspections should only be carried out by trained personnel.
A homeowner should limit checks to safe, external observations.
What Can You Safely Check Yourself?
There are a few simple things you can check without interfering with the system.
You can:
- confirm the house has electricity
- check whether the control panel is showing a warning
- listen for the blower
- inspect the irrigation area from a safe distance
- check for obvious leaks
- reduce household water use
Do not:
- remove tank lids
- handle pumps
- disconnect wiring
- bypass alarms
- open electrical enclosures
- enter wastewater areas
When Should You Call Eco Septic?
Contact Eco Septic or your authorised service technician if:
- the alarm remains active
- the blower is not operating
- the pump appears not to be working
- wastewater is backing up
- water is pooling around the system
- strong odours persist
- the alarm repeatedly returns
- you suspect an electrical fault
- the irrigation area is not functioning normally
It is better to call early than wait until the system overflows.
A Simple AWTS Alarm Checklist
If your alarm sounds, follow these steps.
1. Stay calm.
An alarm is a warning, not necessarily an emergency.
2. Reduce water use.
Stop unnecessary washing, showers and appliance use.
3. Check the control panel.
Note any lights or indicators.
4. Confirm the property has power.
A power issue may be affecting the system.
5. Listen for the blower.
A silent blower may indicate a fault.
6. Check the irrigation area.
Look for unusual pooling or wet patches.
7. Avoid opening the tank.
Leave internal checks to a technician.
8. Contact Eco Septic if the alarm does not clear.
Persistent alarms should always be investigated.
An Alarm Is There to Protect Your System
An AWTS alarm is not something to fear.
It is an early warning system designed to let you know that one part of the wastewater process needs attention.
Sometimes the cause is simple, such as unusually high water use.
Other times it may indicate a pump, blower, electrical or irrigation issue.
The most important thing is not to ignore it.
Reduce household water use, check for obvious external signs and allow the system time to recover if the cause is temporary.
If the warning remains active, contact your service technician.
Understanding what the alarm means can help prevent wastewater backups, protect the irrigation area and keep your Eco Septic system operating properly.
For AWTS servicing, alarm faults or wastewater system assistance, contact Eco Septic or your authorised Eco Septic service provider.
