MAHC 2017 Changes. Are you Ready?


The end of the year is fast approaching and new changes are coming to the Model Aquatic Health Code (MAHC). The State of Nevada is being especially proactive and proposing that changes start to take effect in 2017. We’ve gathered together some of the changes that will affect every commercial pool property in Nevada and included them below for your convenience. We are predicting that these changes will soon be enacted by many other states and jurisdictions.

The Top Changes for 2017  to the Model Aquatic Health Code (MAHC)…Are you Ready?

  • Depth Markers and Markings – new requirements need to be corrected within 2 years.
  • Flow Measurement and Control – a flow meter needs to be accurate +/- 5% of the actual design flow provided. When a VFD is used, must be accurate +/- 2%.
  • New turnover rate requirements (based on the specifics of your pool).
  • Disinfection and pH control – An automated controller will be required for “increased risk” pools within 1 year, 3 years on spas, 5 years on all remaining bodies of water. NSF listed chemical controller required on all new construction or substantial alteration of all aquatic facilities the adoption of MAHC, chemical feeders to be NSF listed. A physical barrier must be in place between feeders supplying chlorine and acid.
  • New chlorine feeder sizing including salt systems- 4Ibs per 10,000 GAL for outdoor pools, 2.5Ibs per 10,000 Gal for indoor Pools.
  • CO2 Feeders – when CO2 feeders are used, an air monitoring device in the room with an audible alarm is required.
  • Secondary Sanitation required on many aquatic facilities.
  • UV Systems require 3rd party validation for 3-Log reduction.
  • Written Preventative Maintenance Plan – a comprehensive preventative maintenance plan for each body of water shall be available at the facility.
  • Inventory of Mechanical Equipment – a comprehensive inventory of al mechanical equipment associated with each body of water shall be available at the facility.
  • CYA or Stabilized Chlorine Products – Below 80PPM and not to exceed 100.  5-year plan is to eliminate completely 5 years from the implementation date of these regulations. For new construction, CYA or stabilized chlorine products are not permitted for spas and therapy pools.
  • Water testing – commercial pools associated with residential living to be tested once a day. For commercial pools not associated with residential living are to be tested prior to opening and every four hours while accessible to bathers. Party Pools to be tested every hour poolside while open to bathers.

Contact VivoAquatics today to chat about upcoming changes and how they may affect your facility.