Chesapeake Magazine, Summer 2014 (Aeration)

Spray Aeration System Reduces THM Levels by 53% in an 8 MG Water Tank

Chesapeake Magazine, Summer 2014

Anticipating implementation of the Stage 2 Disinfection By-Products rule, operators in Rockville, MD expected a complete tank teardown and rebuild would be required to comply with the new rules due to consistently high THM levels. Staff researched options for in-tank aeration and and learned active mixing combined with aeration could solve their water quality issues and save their tank.


  • How aeration combined with active mixing can improve water quality
  • How to manage DBP formation in an oversized, low turnover tank
  • Rockville saved their city’s tank (and budget) with the addition of in-tank aeration

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