Minn. Stat. § 116.27: ADDITIONAL PROHIBITION.

Subdivision 1. Phosphorus content.

No manufacturer, wholesaler, or retailer shall sell, possess with intent to sell, or display for sale, a household laundry or dishwashing compound, including household detergents and presoaks, unless a verified or certified test result is filed with the Pollution Control Agency stating the percentage content of phosphorus by weight contained in the product.

Subd. 2. Tests.

Tests shall be conducted pursuant to the methods and procedures adopted by the federal Water Quality Administration.