|Construction Cost||10,000 · 40 · 20 · 25|
|Maintenance Cost|| +300 · -200 · -250 |
|Size||1 River Slot|
|Unlock||1400 Eco Executives|
The River Sewage Treatment Plant is the ultimate Ecobalance building. It raises the ecobalance by 300, and also does not have an influence area (although it does takes up a river slot), meaning it can easily be combined with other ecobalance buildings. However, because the Guardian and Keeper have the same energy cost of the Treatment Plant but increase the Ecobalance by 500 instead of 300, they are excellent replacements for the River Sewage Treatment Plant.