SUFFOLK COUNTY , NY, HEALTH DEPARTMENT NEW RULE ON TOTAL NUMBER OF BEDROOMS RELATED TO SEPTIC SYSTEM In Suffolk County, NY, adding bedrooms or modifying your home triggers strict septic system rules dictated by Article 6 of the Suffolk County Sanitary Code. The regulations depend directly on your total bedroom count and whether you exceed your property’s prior health department approvals. The 5-Bedroom Rule and "I/A OWTS" Triggers Under standards enforced by the Suffolk Count