Sanitation Now: What is Good Practice and What is Poor Practice?

To meet the 2015 Millennium Development Goals sanitation target or the 2025 universal sanitation coverage target it is essential that it is properly understood where the available sanitation options are applicable. In high-density low-income urban areas conventional sewerage and ecological sanitation systems are inapplicable solely on grounds of cost. In these areas the options are simplified sewerage, low-cost combined sewerage and community-managed sanitation blocks. In medium-density urban areas on-site systems are also applicable (alternating twin-pit VIP latrines and pour-flush toilets, urine-diverting alternating twin-vault ventilated improved vault latrines, biogas toilets and ecological sanitation systems, all with greywater disposal or use). In medium- to low-density rural areas the options are the same as those in medium-density urban areas, with single-pit VIP latrines and pour-flush toilets, rather than alternating twin-pit systems. The level of water supply service (public or community-managed standpipes, yard taps, multiple-tap in-house supplies) also influences the choice of sanitation option