Why Category 3 Hits Hillsboro Hard
The pattern in Hillsboro is consistent. sewer lateral collapse during atmospheric river rainfall events drives most of the emergency restoration calls we get. A close second is hillside septic system failure during saturated soil conditions.
Hillsboro's mild, wet climate increases the risk of black water contamination, particularly during heavy rainfall events that overwhelm aging infrastructure
Hillsboro's mild, wet climate increases the risk of black water contamination, particularly during heavy rainfall events that overwhelm aging infrastructure The dominant local driver is sewer lateral collapse during atmospheric river rainfall events, with hillside septic system failure during saturated soil conditions showing up as the next most common cause. Damage builds in stages. Spread. Absorption. Microbial growth. Structural compromise. Every stage you pass through adds to the final bill.

