Environmental Engineering Reference
In-Depth Information
100
Notes:
1. Even if only 10% of excreta
is left unmanaged, the overall
hazard is not much reduced.
2. Most municipal sewerage
projects pronoted by World
Bank, ADB, USAID, UNEP,
etc. manage sewage only for
affluent city areas. Hence,
they provide little public
health protection, yet these
projects are often
justified
as
overall community health
protection projects.
3. In U.S.,
everybody
in service
area is sewererd.
4. In DC cities, only the
affluent areas are sewered.
Other areas use individual
building on-site subsurface
disposal units, which often
function very inadequately.
5. To get real public health
protection, need 100%
excreta management =
sewers for affluent areas
plus
