UV Solution for PMO Compliant Pasteurized Equivalent Water

What is PMO? In 1924 the U.S. Public Health Service developed the Standard Milk Ordinance to assist states with voluntary pasteurization programs. The Grade A Pasteurized Milk Ordinance (PMO), as it is now called is the regulatory gold standard for the U.S. dairy industry. As with most food industry regulations, the PMO is a living document. It’s reviewed and revised every two years to incorporate new scientific research and new technologies.

The purpose of pasteurization is to destroy disease causing microorganisms (pathogens) that may be present in milk and to increase the quality and shelf life of milk by destroying spoilage microorganisms and enzymes.

The PMO specifies that water for use in contact with milk in Grade-A plants must be pasteurized. Since 2011, Ultraviolet disinfection has been approved to replace thermal pasteurization for this water, as long as certain criteria are met.

Environmentally friendly ultraviolet light disinfection can be used in place of pasteurization to create pasteurized equivalent water in order to meet Pasteurized Milk Ordinance (PMO). The use of ultraviolet light to meet the bacteriological requirements of the Pasteurized Milk Ordinance (PMO) has been accepted in 2009 revision as long as UV disinfection equipment, used to disinfect water to potable drinking water standards, complies with the criteria described within PMO. Both low pressure (LP) UV lamp technology as well as medium pressure (MP) UV lamp technology is accepted in PMO

Why UV Instead of Pasteurization?

  • Significant energy savings
  • High efficiency and performance
  • Provides diversion under alarm conditions
  • High system stability and low downtime
  • Installed and operating at large dairy facilities
  • Low maintenance cost
  • Environmentally friendly

UV Is Proven Technology

Safeguarding public health is at the core of the PMO, which includes the following requirements of UV products:

  • 100 percent of the water is treated. The equipment must initiate flow diversion if there is insufficient UV energy for treatment, or if the system operation is otherwise compromised;
  • The PMO mandates a minimum dose of 186 mj/cm²
  • Designed for frequent cleaning;
  • One germicidal UV intensity sensor per lamp;
  • Recording of flow, water quality (UV transmittance), UV dose; and
  • Made of non-toxic materials.

SEE HOW IT WORKS: Pasteurized Equivalent Water by Ultraviolet – PMO requirements

The Smith solution for PMO compliant pasteurized equivalent water is the Aquafine SwiftBeverage PMO which fully complies with PMO for the Dairy Industry. UV Disinfection does not add anything to water or food, nor does it generate harmful by-products or alter aesthetic appearance or quality

Aquafine SwiftBeverage System – Validated UV Disinfection for Beverage Industry


Smith’s Christa Theisen accompanied Dien Ho, Regional Sales Manager for Aquafine, at the recent ProTech Food Show in Chicago. The show was well attended by manufacturers from all over the world from the food and dairy industry. Many potential new customers were excited about the advantages to this technology, that it’s fast, efficient, effective, economical and environmentally friendly.

Christa Theisen attended the recent ProTech Food Show in Chicago with Aquafine’s Regional Sales Manager, Dien Ho.


PMO Approved: Grade A Pasteurized Milk Ordinance 2015