Gross Pollutant Trap Cleaning | TDG Environmental
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What is GPT and SPS Cleaning?

A Gross Pollutant Trap (GPT) is a stormwater filtration device designed to capture and retain large solid waste and debris to prevent pollution in water bodies. It functions by allowing water to flow through while trapping litter, sediment, and debris over five millimetres in size.

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Regular cleaning and maintenance of GPTs are crucial to ensure their effectiveness in preventing blockages, reduced flow capacity, and potential flooding during heavy rain events. With extensive experience servicing over 3,000 GPTs quarterly, we are proficient in ensuring these assets function optimally in stormwater management solutions.


Sewer Pump Station (SPS):

Sewer pump stations are vital for efficient water and sewage services, but inadequate maintenance can lead to blockages, fat buildup, and eventual system failure, causing wastewater overflow and environmental harm. Regular cleaning and maintenance of Sewer Pump Stations (SPS) are essential to ensure their effectiveness in preventing blockages.

What problem does GPT and SPS Cleaning solve?

Ensure continuous functioning of GPTs and SPSs

To ensure the continued functioning of your GPTs and SPSs, they must consistently be clean and free from debris and build-up, making a frequent maintenance schedule extremely important.

Limit unplanned downtime

A full or even partial blockage of your GPTs or SPSs can lead to unplanned downtime for your operations. Regular GPT or SPS cleaning can ensure this costly interruption is minimised.

Prevent pollution from entering waterways

While the role of a GPT is to stop gross pollutants entering our waterways, this can still occur if they are not maintained appropriately. The cleaning of your GPTs minimises the chance of this occurring.

Meet your environmental commitments

Eliminating or minimising the chance of pollutants entering our waterways is an essential by product of GPT cleaning and one that ensures you meet your organisational commitments to the environment.

GPT & SPS Maintenance and Cleaning Features

Gross Pollutant Trap Cleaning


At TDG Environmental, we specialise in gross pollutant trap cleaning, ensuring the effective maintenance of gross pollutant traps (GPTs). Our bespoke fleet of vehicles and plant equipment is specifically designed for GPT cleaning, including combination jet/vac units, grab trucks, and small tippers. Each vehicle in our fleet is tailored to handle various requirements, ensuring maximum efficiency and effectiveness.


Our Combination Jet/Vac Units are uniquely designed to accommodate multiple applications and loading requirements. The dual-pump system in these units allows us to use one pump for the removal of large amounts of debris while using the smaller pump to pressure clean any dirt, waste, or sediment out of the gross pollutant trap. This ensures that the grate remains clean and clear, allowing water to flow freely through the gross pollutant traps. In addition to these units, we utilise Clamshell Grab Trucks equipped with extendable boom arms, capable of clearing a wide range of bulk waste from GPTs. Regular gross pollutant trap cleaning is essential to maintain the efficiency of these systems.


Gross pollutant traps work by using gravitational sedimentation, physical filtration, and buoyancy skimming to capture and retain pollutants. As primary treatment devices, they play a key role in improving water quality and protecting water systems by preventing larger debris from reaching downstream treatment devices.


To achieve an effective clean, we follow a meticulous, step-by-step process:

  1. Inspection: We conduct a thorough inspection to identify any blockages, damage, or maintenance requirements that need to be addressed during the cleaning process. This initial step is crucial to ensure that the cleaning is comprehensive and addresses all potential issues.
  2. Removal of Gross Pollutants and Sediment: We use specialised vehicles and equipment to remove gross pollutants, such as plastic bottles, cans, leaves, branches, cigarette butts, and sediment, from the trap. Removing these pollutants is crucial to prevent environmental harm and to ensure the GPT functions effectively.
  3. Jetting/Pressure Washing: If necessary, high-pressure jetting or pressure washing is employed to dislodge and remove stubborn debris and buildup. This step ensures that the GPT is thoroughly cleaned and free from any obstructions that could impair its performance.
  4. Maintenance and Repairs: During the cleaning process, any maintenance or repair needs are assessed and addressed. This may include repairing damaged components, replacing worn-out parts, or making adjustments to ensure the full functionality of the trap.
  5. Disposal or Recycling: The collected waste and debris are sorted and separated, then properly disposed of or recycled in line with environmental regulations. This step ensures that our cleaning processes are environmentally responsible.


All our processes are completed in compliance with environmental regulations and stormwater management system guidelines. Once each cleaning is complete, a detailed report is provided as a record of the work performed and the condition of the GPT. Maintaining clean stormwater drainage systems is essential for effective water management, and regular GPT cleaning plays a vital role in this effort.


Sewer Pump Stations (SPS) Maintenance and Cleaning


Sewer pump stations (SPS) play a crucial role in providing efficient water and sewage services. However, if not adequately maintained, blockages can form, fat can build up, and parts can start to fail. This can lead to a backlog of sewage, which cannot effectively flow through to the next stage of processing, ultimately causing a wastewater overflow and environmental harm.

At TDG Environmental, our fleet of bespoke vehicles and plant equipment is designed to effectively clean SPS units. Our fleet includes Combination Jet/Vac Units, Grab Trucks, and small tippers. Our operators are specifically trained to clean each individual SPS unit uniquely, taking into consideration the SPS’s specifications and the most efficient order to clean the units.

Our Combination Jet/Vac Units, maximise productivity by reducing the time spent carting waste to specified waste facilities. These units feature a 360° rotating vacuum boom with an impressive 7m reach, which aids in reaching difficult-to-access units. They are equipped with dual pumps: one for high water supply to move large amounts of debris, and another for high-pressure cleaning. The vacuum power of these units spans from 4,200 to 5,900 cfm, enabling us to service greater heights and distances. The 8-inch vacuum system allows us to increase productivity by removing large amounts of debris in one go, further saving our customers time and money.




TDG Environmental, we are committed to providing top-notch cleaning and maintenance services for GPTs and SPS units. Our bespoke fleet of vehicles and equipment, combined with our thorough and methodical approach, ensures that we can effectively maintain these critical components of stormwater and sewage systems. By doing so, we help protect the environment and ensure the efficient functioning of water management systems.


Gross pollutant traps (GPTs) are essential in managing stormwater runoff and maintaining water quality in urban environments. By trapping litter, debris, and gross pollutants such as plastic bottles and cigarette butts, GPTs prevent these pollutants from entering waterways, lakes, and rivers. GPT systems are designed to capture pollutants and sediment, improving the pre-treatment of stormwater and protecting aquatic habitats.


Effective GPT cleaning involves the removal of gross pollutants, which helps prevent blockages and maintain the efficiency of the stormwater system. Regular maintenance and cleaning of GPTs are crucial for local councils and environmental agencies to protect the surrounding environment from pollution. Most GPTs require periodic cleaning to ensure they continue to capture and remove pollutants effectively.


In addition to GPT cleaning, sewer pump station (SPS) maintenance is vital for preventing blockages and ensuring the smooth operation of sewage systems. Our advanced equipment and skilled operators ensure that SPS units are thoroughly cleaned and maintained, preventing environmental harm and protecting water quality.


Get in Touch


TDG Environmental’s comprehensive cleaning services are at the forefront of the market today. By utilising cutting-edge technology and a meticulous approach, we provide reliable and effective solutions for maintaining stormwater and sewage systems, ensuring the protection of the environment and the efficiency of water management systems.


What makes our service unique?

Bespoke vehicles and plant equipment

Our Combination Jet/Vac Units have a unique design, allowing for multiple applications and loading requirements. We also use small tippers and Clamshell Grab Trucks with extendable boom arms, capable of clearing a range of bulk waste from GPTs.

Our two-pump system

We use one pump for the removal of large amounts of debris, while using the smaller pump to pressure clean any dirt, waste or sediment out of the GPT and ensure the grate is clean and clear for water to flow through.

Tailored solutions, always to standard

We take a unique approach to cleaning each individual GPT to meet its specifications and always operate within environmental regulations and stormwater solutions guidelines.

24/7 Emergency Service

At TDG Environmental our dedicated team operates around the clock, ready to respond with our 24/7 emergency spill and response services.

Get in touch

For a comprehensive quote on any of our services, or general enquiries, please fill out the form below or contact us.

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      What we do

      TDG Environmental is the most experienced provider of sustainable waste and stormwater management solutions throughout Australia and New Zealand specialising in a comprehensive range of environmental services including:

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