| Basque | English |
| bakterio fekal | faecal bacterium Bacteria contained in human and animal faeces |
| bakterio-geruza | bacterial bed A device that removes some suspended solids from sewage. Air and bacteria decompose additional wastes filtering through the sand so that cleaner water drains from the bed |
| bakterio koliforme | coliform bacterium A group of bacteria that are normally abundant in the intestinal tracts of human and other warm-blooded animals and are used as indicators (being measured as the number of individuals found per millilitre of water) when testing the sanitary quality of water |
