NSF/ANSI 61 Certification

The first and only company with a complete chemical tank certified to NSF/ANSI 61!

NSF/ANSI 61 addresses crucial aspects of drinking water system components. 

Most products that come in contact with potable water are tested under NSF-61 with the pH 5, pH 8 and pH 10 exposure waters defined in the standard. These exposure waters were designed to simulate the wide variety of potable water chemistries encountered across North America. However, these exposure waters were not designed to predict leaching of materials caused by aggressive chemicals. To address this concern, NSF created a more extensive standard and certification. As a leader in the chemical storage tank industry, Poly Processing holds this more stringent chemical certification and to make sure we provide the safest tank systems for drinking water safety, we certified the complete system from tank to bolt washers to this strict standard. 

Our NSF/ANSI 61 Certifications

NSF Certified

Poly Processing holds three NSF/ANSI 61 certifications.  We have obtained these three separate designations to bring the most value to each application while maintaining the highest standards when storing or treating potable water.

OR-1000™ resin and all associated fittings have been tested and certified by NSF for the storage of sodium hypochlorite and sulfuric acid to ensure they are safe in the treatment of potable water.

PolyCL resin and all associated fittings have been tested and certified by NSF for all the chemicals listed below excluding potable water, sodium hypochlorite,
and sulfuric acid to ensure they are safe in the treatment of potable water.

Standard HDPE tanks hold the basic NSF/ANSI 61 certification for potable water only.

Chemicals Our Tanks Are Certified In

Poly Processing offers these NSF-certified solutions from all three production facilities for the storage of:

Acetic Acid ≤ 80%

Aluminum Chlorohydrate

Aluminum Sulfate ≤ 50% (Alum)

Calcium Carbonate 60–100%

Calcium Chloride ≤ 30%

Chlorine Dioxide ≤ 38%

Citric Acid ≤ 100%

Copper Sulfate ≤ 25%

Deionized Water

Ferric Chloride ≤ 50%

Ferric Sulfate ≤ 60%

Ferrous Chloride ≤ 37%

Ferrous Sulfate ≤ 30%

Hydrochloric Acid ≤ 37%

Hydrofluoric Acid ≤ 52%

Hydrofluosilicic Acid ≤ 30%

Hydrogen Peroxide ≤ 10%

Liquid Ammonium Sulfate 35–45%

Magnesium Chloride ≤ 35%

Peracetic Acid ≤ 10%

Phosphoric Acid ≤ 75%

Poly Aluminum Chloride ≤ 100%

Polyorthophosphate ≤ 100%

Potable Water

Potassium Hydroxide ≤ 50%

Potassium Permanganate ≤ 4%

Sodium Aluminate ≤ 100%

Sodium Bisulfite ≤ 40%

Sodium Carbonate ≤ 85%

Sodium Chloride ≤ 26%

Sodium Chlorite ≤ 34%

Sodium Hydroxide ≤ 50%

Sodium Hypochlorite ≤ 0.08%

Sodium Hypochlorite ≤ 15%

Sodium Permanganate ≤ 40%

Sodium Silicate ≤ 100%

Sulfuric Acid ≤ 98%

Zinc Orthophosphate ≤ 100%


View all of Poly Processing's NSF certifications below. 

View Our NSF Certifications

Find out more about NSF-61 and its importance by downloading our NSF/ANSI-61 Guide

Download Our NSF-61 Guide

Looking to learn more about NSF/ANSI 61 Certification and how it can vary? Our eBook covers topics such as NSF certification for potable water storage vs. chemical storage, certification differences based on your state, and system vs. tank certification. Decode NSF/ANSI 61 Certification today. 

Download the NSF/ANSI 61 Decoded eBook

Additional Resources