Why Category 3 Hits Pomona Hard
The pattern in Pomona 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.
Pomona's Mediterranean climate features dry summers and wet winters, increasing the risk of sewer backups during heavy rainfall. The region's clay soils can also lead to prolonged water saturation, exacerbating contamination risks.
Pomona's Mediterranean climate features dry summers and wet winters, increasing the risk of sewer backups during heavy rainfall. The region's clay soils can also lead to prolonged water saturation, exacerbating contamination risks. 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.

