Gutters

In many cities, stormwater and sewage water are collected in the same sewer. As a result, good rainwater is combined with dirty sewage water. Overflows can create major problems for cities. But avoiding those problems is not exactly easy.
Apr 17, 2010   Urban Omnibus
Portland's "Green Streets" program is becoming a new tourist attraction in the city, which officials from other cities are visiting to learn from the Pacific Northwest's model water treatment infrastructure.
Mar 30, 2010   USA Today