Chemical additive approvals

Aerial view of St. Cloud wastewater treatment plant

Federal (40 CFR 122.44(d)) and Minnesota law (Minn. R. 7050.0210 subp. 13, Minn. R. 7050.0222 subp. 7) prohibit chemical additive use in amounts that compromise aquatic life or waters protected for human health. See the calculator and guidance document below to help you get approval for using chemical additives at your wastewater treatment facility. You must use the procedures they outline; they will guide you through the process of dosing your additives in a way that is protective.

The YouTube videos below offer helpful tips from the guidance document and a demonstration of the calculator.

Please send all additive requests to


Chemical additive review process

Chemical additive approval calculator