🌐EnglishEnglishDeutschEspañolFrançaisNederlandsPolskiРусскийالعربية中文日本語EntityQ3256521· pop 12· linked from 137 articlesseptic drain fieldtype of subsurface wastewater disposal facilityConnectionswastewater treatmentEntityfrench drainEntityCategoriesEnvironmental engineeringEnvironmental soil sciencePollution control technologiesSanitationSewerageSewerage infrastructureWaste treatment technologyWater pollution