Omaha, Neb. — The 15th edition of HDR’s popular Safe Drinking Water Act wall chart is now available. HDR has distributed more than 1.2 million of the poster-sized charts free to water utilities, schools and professionals around the world since introducing it 25 years ago.

The chart provides an easy-to-use reference to drinking water regulations, including a detailed listing of contaminants and maximum contaminant levels, health effects, and monitoring requirements.

The 15th edition of the chart outlines four key objectives for next steps to safe drinking water:

  • Regulatory compliance
  • Protecting public health
  • Building resiliency
  • Optimizing operations

The chart can be ordered on HDR’s SDWA page at, which also links to other reference materials about water treatment and drinking water regulation. Visitors can also order wall charts for condition assessment and drinking water operations.