The Porirua Harbour (Te Awarua-o-Porirua) catchment includes all of that area of Wellington and Porirua City where water flows via streams, lagoons and lakes into the Porirua Harbour.
This includes the Johnsonville, Churton Park and Tawa catchments that flow down Porirua Stream and its many tributaries;
Clicking on either a catchment name on the upper left, or an underlined link above will enable you to view the catchment you live in and the path the stormwater and runoff travels to get to the sea via the Porirua Harbour.
This map shows the overall catchment boundary for the Te Awarua-o-Porirua Harbour :