Do this only if you are on a sewer system.

This was how he'd developed his interest in a public sewer system.

By the year 2000, 60% of the population was connected to a sewer system.

Access to drinking water is available to 90% of the population, and 85% can use the sewer system.

The first sewer system, if all goes according to plan, should be installed and working by about 2007.

What I wanted, real bad, was to have my maps of the sewer system.

The others take water that has not been used back into the underground sewer system.

You need a functioning sewer system to support business development.

Over the years, the town's sewer system reached the point of near collapse.

With the help of the younger boy, the two escape through the sewer system.

His work and reports led to the building of London's sewage system.

By 1900 the city was operating its own sewage system.

The sewage system played an important role in the building placement.

It was part of a sewage system built in Roman times.

Their plan was to join the river with the sewage system.

Just getting the sewage system to work could be a problem.

Thousands of people moved into the community and a modern sewage system was built.

Installation of the new water and sewage system began July 18, 1946.

With no electricity, running water or sewage system, they see summer as a time of disease and death.

Approximately 10% of the population has access to a sewage system.

About 38% of the population is covered by a sewerage system.

Implementation of the sewerage system was first started in 2011.

Some 45 percent of the population is not connected to the public sewerage system.

The main issue facing the island is lack of a sewerage system.

However, a sewerage system for all residents has not yet been completed.

Even the sewerage system was held up as a model of good asylum practice.

London's growth has put pressure on the capacity of the sewerage system.

For a time, he was employed on the sewerage system of Boston.

Only half of Japan's homes are connected to sewerage systems.

In parallel, an effort was made to expand the sewerage system.