| polski | pol-000 |
| oczyszczalnia | |
| čeština | ces-000 | čistička |
| English | eng-000 | purification plant |
| English | eng-000 | refinery |
| English | eng-000 | sewage treatment plant |
| English | eng-000 | sewage-farm |
| English | eng-000 | sludgeworks |
| English | eng-000 | wastewater treatment plant |