• What is infiltration and inflow?
    Infiltration and inflow (I&I) is a term describing a condition when rainwater, irrigation water, or groundwater, enters the sewage handling system. I&I results in higher-than-expected flows from a household or our community system. It also results in higher wastewater treatment costs to our community and the individuals. Diluted wastewater is harder for the City of Gig Harbor to treat effectively, and they require management if there is a problem. I&I impacts our members as we pay for treatment by the gallon.