The United States Environmental Protection Agency first registered peracetic acid as an antimicrobial in 1985 for indoor use on hard surfaces. Today, registered applications have expanded to include: sanitation at food and beverage plants, agricultural premises, wineries and breweries, greenhouse facilities and equipment, as well as animal housing. Peracetic acid is also approved for use in dairy/cheese processing plants, and directly on fruits and vegetables, as well as on meat, poultry, and seafood products. It is also used to prevent bio film formation in paper and pulp industries, and as a disinfectant for municipal effluent. As the interest in "green chemistries" increases, PAA is finding use as a biocide in industrial cooling water systems.

Enviro Tech currently has three methods for testing available PAA in use solutions. These consist of:

• Test strips - Useful for quick, approximate measurements, particularly between 0-80ppm.
• Drop test kits - Formulated specifically for Enviro Tech PAA, and useful for accurate measurements at all typical use concentrations. This is the only drop test kit that is recommended for our PAA.
• Digital handheld electronic meter - Easy to understand digital readout, and much less affected by operator bias. No dropper bottles or watching for color changes. Low range from 0-10 ppm with 0.1 ppm resolution, and high range from 0-200 with 2 ppm resolution. This is the recommended test method for all PAA uses, and the most useful test method for uses requiring less than 10 ppm PAA such as irrigation and cooling water.