Removing Manganese and Iron From Raw Water (Options: Pros, Cons)

Iron and Manganese are two minerals that occur naturally in raw water. These minerals aren’t harmful, but essential to human life. However, their presence can lead to bad smells in potable water, as well as unsightly stains on homeowners’ faucets. For this reason, water treatment plants use various methods to remove or reduce these minerals during the water treatment process, some of which require the use of chemicals.

Here are 3 methods of removing iron and manganese from raw water, plus some chemicals that are commonly used in this application. Note that while these products are very effective when used properly, any one of them can have an effect on another aspect of the water treatment program. For this reason, one or the other may not always be the best solution for your water.



One way to remove iron and manganese from water is by oxidizing the dissolved minerals to convert them into a different form. Oxidized, iron becomes iron oxide (which is essentially rust), and manganese becomes manganese dioxide. These can be removed by filtration or with coagulants. Products used for oxidation should be added as close to the raw water source as possible. For potable water applications, only NSF/ANSI 60 certified product should be used.

Hydrogen Peroxide

  • Pros: This product is both very effective and economical. This liquid solution is commonly available in a variety of concentrations.
  • Cons: Higher concentrations of this product are regulated by the DHS.

Potassium Permanganate

  • Pros: This product is a powerful oxidizer. Also, more usable product per pound means that it is more cost effective.
  • Cons: This product is an ultra-fine powder, which means that you have to get it into a solution before using it. It has a deep, dark, crimson color that leaves long-lasting stains on your skin after handling. Also, this is a regulated material.

Sodium Permanganate

  • Pros: This is a liquid product that is both ready-to-use and easy to use. This product comes in a drum or tote and is simply fed into the water.
  • Cons: This product is less cost effective per actual product pound, as the majority of the liquid solution is water.



Coagulants work by neutralizing the charge of suspended particles allowing them to bond to one another. Particles are then able to flocculate for easier removal. Coagulants are multi-functional and effective to use with many types of suspended particles.

Polyaluminum Chloride (COREPAC)

There are many variations of polyaluminum chlorides, some of which work better for removing manganese and iron than others. Using the wrong coagulant, or using the coagulant incorrectly, may cause your coagulant to technically ‘work’, but not fully strip manganese and iron from the water. To select the best COREPAC product for this concern, testing (on-site or possibly jar testing) must be done.

  • Pros: To some degree, COREPAC can be customized to your raw water source. You can get a more cost-effective coagulation using COREPAC than other traditional coagulants, as much less product is needed for effective results.
  • Cons: COREPAC is more costly per pound.



Absorptive materials can be added to water for a period of time, then filtered and removed.

Powdered Activated Charcoal

  • Pros: This is an all-natural substance. Also, it is multi-functional; this will effectively remove both seen and unseen impurities such as color bodies, organic carbons, dissolved minerals, smells, tastes, etc.
  • Cons: There are a limited number of quality manufacturers in the market, so this material can be costly.


A water treatment plan should be designed specifically for your raw water source. To discuss the best way to remove iron and manganese from your water, or to ask about coagulation tests, contact us and a representative will be in touch shortly. We look forward to speaking with you!


August 26, 2020

Take your water quality to the next level with our two new water treatment products! Designed for use in both municipal and industrial water and wastewater treatment applications, COREPAC coagulants and POLYCORE flocculants are an exciting addition to our current product offering. For any liquid/solid separation or dewatering application, COREPAC and POLYCORE are your clear solution.


COREPAC Coagulants



  • COREPAC: Treat your water or wastewater with a polyaluminum chloride, or PAC, to neutralize the charge of suspended particles and effectively prepare water for flocculation/sedimentation. Learn more about COREPAC.




  • POLYCORE: These flocculants promote clumping of suspended, neutralized particles and cause macroflocs to form, which can then be easily separated from the water. Learn more about POLYCORE.


When seeking effective products for coagulation and flocculation, partner with a company who is passionate about helping you achieve your water quality goals.  At CORECHEM, we take your water quality goals seriously, and have the product offering to meet the many varied needs in water and wastewater treatment processes. For a free water quality consultation, get in touch with a sales rep today. We look forward to speaking with you!

Tennessee Association Of Utility Districts ( TAUD) Operator Expo


The TAUD ( Tennessee Association Of Utility Districts) Operator Expo is held at the Wilson County Fairgrounds in Lebanon,Tennessee. Its purpose is to exhibit vendors and provide demonstrations from experts in the utility industry, while giving other utility professionals from across the state the chance to meet and talk. Meet us at the TAUD Operator Expo in Lebanon, Tennessee on May 17th 2018! We look forward to seeing you there!




Women In Water

On March 1st, TAUD announced the formation of Women in Water, a TAUD networking group “dedicated to women actively engaged in the water and waste water profession” [Greg Baker, TAUD Newsletter]. Our own Chloe Pool had the honor of being the first topic presenter for Women in Water at the March 7th gathering in Alcoa, TN.
Before Women in Water’s establishment, Chloe enjoyed an informal gathering of women in the water industry, the first of which was a lunch involving Dina Gouge of Southeastern Tank, Ashley Pealer-Richards of J.R. Wauford, Kathy Quartermaine of TN 811, Jenna Hazelet of ServLine, and Carolyn Rambo of Pinnacle Financial Partners, with hopes of the network growing over time. Each of these women now serve on the Women in Water committee, joined by First Utility District of Knoxville’s Kena Hyers and April Cansler. Chloe explained that “TAUD continually demonstrates such willingness to support the water and waste water industry in a variety of ways—and they continue to do so through the establishment of Women in Water, which is growing every day.” She expressed her thankfulness “to be part of the supportive TAUD family.”
TAUD’s Women in Water was formed to support the expanding presence of women in the industry. Dina Gouge, a committee member of Women in Water as well as associate member of TAUD, describes the purpose of the group being to “discuss issues important to women in the workplace.” For additional information regarding Women in Water, please feel free to contact Chloe Pool (, any of Women in Water’s committee members, or TAUD directly at

The Women in Water logo was designed by April Cansler

NSF Certification

What is NSF?

NSF is the leading global provider of public health and safety solutions, and is continuously meeting the needs of the community around them. This includes stakeholders, government agencies, and the overall business community. NSF started out in 1944 as the National Sanitation Foundation, which focused on the sanitation of soda fountains. This was the beginning of many of the regulations and standards that they use today. In 1990, they changed their name to NSF International, keeping the NSF as an original part of their name.

The NSF focuses on extensive product testing and material analysis, and they frequently conduct unannounced plant audits to ensure that quality is being maintained. This helps protect food, water, consumer products and the environment from unintentional and intentional contamination. They also provide voluntary auditing, education, and risk management solutions to ensure that businesses are meeting the requirements needed. The NSF mark ensures that the products you are purchasing are thoroughly tested and comply with all NSF/ANSI standard requirements.

“NSF is key to making sure that products meet strict standards for public health protection.”

What This Means For Your Company:

Currently 48 of the 50 states In the United States of America require compliance to NSF/ANSI-60, for drinking water. CORECHEM Inc. has been an NSF certified facility for water treatment chemicals since 2014. Our customers can be assured that all of our products are of the highest quality, meeting or exceeding state regulations.

View list of NSF-Certified Chemicals

View list on NSF Website