Potassium permanganate (KMnO4) is a powerful oxidant that has become widely used in soil and groundwater remediation. It is particularly effective in treating contaminants such as chlorinated solvents, including trichloroethylene (TCE) and perchloroethylene (PCE). In this article, we will explore the benefits of using potassium permanganate for remediation and how it can be a cost-effective and successful treatment option for various remediation projects.


Potassium permanganate has become a popular choice for soil and groundwater remediation, especially when treating DNAPL source zones or zones with high residual contamination. The permanganate anion (MnO4-) is the active oxidant, and it is a potent oxidizing agent that can react with a wide range of contaminants.

Advantages of Using Potassium Permanganate for Remediation

There are several advantages to using potassium permanganate for soil and groundwater remediation. Some of these benefits include:

  • Wide pH Range: Potassium permanganate is an effective oxidant over a broad pH range, which makes it suitable for a wide range of remediation projects.
  • Does Not Require Activation: Unlike other oxidants, such as hydrogen peroxide, potassium permanganate does not require activation. This makes it easier to use and reduces the complexity of remediation projects.
  • Easy to Detect: Potassium permanganate is easy to detect in monitoring wells, which allows for better monitoring of the remediation process.
  • Safe and Easy-to-Use: Potassium permanganate is pH neutral and does not release gas or create heat during the reaction with contaminants. This makes it a safe and easy-to-use oxidant for a wide range of remediation applications.

Additionally, potassium permanganate can be added to excavation pits before backfill to treat groundwater flowing back into the excavated area. This is a great way to ensure that your remediation project is successful.

Delivery Methods for Potassium Permanganate

There are two primary delivery methods for potassium permanganate: on-site mixing and off-site mixing. On-site mixing can be challenging, and it requires specialized equipment and safety precautions. This method involves diluting the potassium permanganate powder on-site and mixing it with water to create a solution for injection.

Off-site mixing is the preferred method for many remediation projects. The potassium permanganate oxidant is delivered as a dry powder, which is over 97% pure and mixed with water at room temperature up to a 5% solution for injection. The powder can be diluted on-site and, for larger quantities, can be mixed and delivered to the site in a tanker truck via our site-ready solutions service. This method reduces the risk of exposure and accidents as we;; as ensuring that the potassium permanganate solution is completely mixed and is certified to be the correct solution percentage required for your site.

Custom Blended Solutions

At CAP Remediation, we offer both standard and custom blended solutions of potassium permanganate. This allows you to get the right solution for your project, ensuring that the remediation process is successful. We have experienced professionals who can help you select the appropriate blend of potassium permanganate for your project.

Pre-mixed solutions can be delivered via bulk tanker or IBC totes. Depending on your site requirements, the solution can be unloaded from tankers into on site storage tanks, pumped directly into injection wells, or unloaded right into an excavation pit. Bulk tankers are also able to be staged on site as needed, with secondary containment as required. 

CAP Remediation works with a nationwide network of blending partners to find the best resource for your custom blend requirements. 

Resources for Effective Remediation

To ensure the success of your remediation project, it is essential to use high-quality potassium permanganate. At CAP Remediation, our potassium permanganate is carefully sourced through a single channel and regularly tested for quality. 

We are also able to draw on decades of experience in managing remediation projects in the field to help you ensure you meet your project goals. If you are looking for advice in planning or just need a second opinion on calculations, we are here to help. 

The following are a few of the resources available to assist in planning and executing your ISCO project with permanganate: 

In Situ Chemical Oxidation for Groundwater Remediation – Technology Practices Manual (SERDP/ESTCP)

Design Tool for Planning Permanganate Injection Systems (Clu-In)

NAVFAC’s Design Considerations for In Situ Chemical Oxidation

In Situ Chemical Oxidation: Performance, Practice, and Pitfalls (Clu-In)

Potassium Permanganate for Excavation Pits

Excavation pits are commonly used in soil and groundwater remediation to remove soil or sediment that has been contaminated with chlorinated solvents and other COCs. Once the excavation is complete, the pit is backfilled to its original grade. However, during the backfilling process, groundwater can flow back into the excavation pit and re-contaminate the newly installed backfill. This is where potassium permanganate can be a useful tool in the remediation process.

By adding potassium permanganate to the excavation pit before backfilling, any groundwater that flows back into the pit will come into contact with the oxidant and be treated. This ensures that the newly installed backfill is not re-contaminated, which would require additional remediation efforts.


Potassium permanganate is a powerful oxidant that is widely used in soil and groundwater remediation to treat contaminants such as chlorinated solvents. It is a proven and cost-effective treatment option, particularly for DNAPL source zones or zones of high residual contamination. The oxidant is easy to detect in monitoring wells, does not require activation, and is applicable over a wide pH range.

By choosing high-quality potassium permanganate from CAP Remediation, you can be assured of the success of your remediation project. Our experience and expertise in the field of remediation, along with our high-quality potassium permanganate, make us a reliable partner in your remediation efforts. Whether you need standard or custom blended solutions, we can provide you with the right solution for your specific project needs. We understand that every site is unique, and we work closely with our clients to develop a tailored approach to each project. Our commitment to quality and safety ensures that our potassium permanganate products are of the highest quality and meet all necessary regulatory requirements.

At CAP Remediation, we are dedicated to providing our clients with the tools and resources they need to achieve successful remediation outcomes. Our team of experts is available to assist you throughout the entire remediation process, from planning to execution and monitoring. We pride ourselves on our responsive customer service and product support, and we are always available to answer any questions or concerns you may have.

In conclusion, if you are looking for a powerful and effective oxidant for your soil and groundwater remediation project, potassium permanganate from CAP Remediation is the right choice. With our high-quality products and expert support, you can achieve successful remediation outcomes while ensuring the safety of your workers and the environment. Contact us today to learn more about our potassium permanganate products and services.