Pink slime in bathroom, sinksUpdated 3 months ago

Mold or Bacterial Growth After Installing Water Treatment

Overview
After installing water treatment that removes chlorine or other sanitizers, some homeowners may notice new or increased bacterial or mold growth in damp areas such as sinks, showers, or bathrooms. This is not caused by the treatment system itself but by the removal of residual disinfectants that were previously present in the water.

This can be more noticeable in humid regions, such as the greater Seattle area.

Why It Happens

Municipal water supplies typically contain low levels of chlorine or similar sanitizers. When a filter removes those substances, airborne bacteria and mold spores in the home may be able to grow more easily in moist environments.

The Fix

To prevent or reduce growth:

• Clean regularly using antibacterial or disinfectant cleaning products, especially in bathrooms and around sinks.

• Ventilate the space by opening a window or running the bathroom fan after showering.

• Reduce moisture by avoiding standing water and promptly drying wet towels or bathmats.