sewage works BrE
sewage farm BrE
sewage plant AmE
sewage treatment plant
effluent treatment plant
wastewater treatment plant

All sides agreed that the sewage plant was not working.

Wouldn't an on-site sewage plant have to be built before the first building had even been completed?

This is sometimes also the case for the industries' own sewage plants.

The building of more and better sewage plants along its course has led to an improvement since 1990.

Turn left along the track and walk past the sewage plant (things get better after this!).

I passed up swimming in it, though, when we learned that there was a sewage plant just down the road.

And the biggest weakness, many of them say, is in the effort to improve the sewage plants.

We have our own water system and our sewage plant.

But two sewage plants on the small river were upgraded.

And new sewage plants must employ the best treatment technology, according to the agreement.