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Are there water taps in the households to be served ?

First stage algorithm for Selection of Sanitation Technology. Start. no. no. Go to 2 nd stage algorithm. Are there water taps in the households to be served ?. Is the wastewater flow greater than 50 liters per capita daily ?. yes. yes.

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Are there water taps in the households to be served ?

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  1. First stage algorithm for Selection of SanitationTechnology Start no no Go to 2nd stage algorithm Are there water taps in the households to beserved ? Is the wastewater flow greaterthan 50 liters per capita daily ? yes yes Are therestrong social or environmentalreasonsthatpreclude the use of conventionalsewerage ? yes yes Is there a strong social preference to reuseexcreta ? no no no Are sewered pour-flush toiletsaffordable ? Sewered pour-flush toilets yes no Is the soilsufficientlypermeable for on-site disposal or septic tank effluent ? no yes Are sewersaffordable ? Sewerage yes Can water consumptionbereducedsothat on-site disposal or septic tank effluent is possible ? Are the plot sizes large enough for septic tank and soakaways ? no no no no yes yes Are septic tank withsoakawayscheaperthanconventionalsewerage ? yes yes Are septic tank affordable ? Septic tank and soakaways

  2. Second stage algorithm for Selection of SanitationTechnology Start Is there an assuremed use for compost or stabilized humus by households or others ? Is reuse of liquidpreferred over use of compostedexcreta ? Is sufficient water available for pour-flush toilets ? yes yes yes Are 3-stage septic tanks affordable ? 3-stage septic tank no no no no Can double-vaultcompostingtoiletsbeexpected to bewellmaintained ? Is sufficientorganicwastematerial or ashavailable ? Are double-vaultcompostingtoiletsaffordable ? Double-vaultcompostingtoilets yes yes no no no Ventilatedimproved double-pit latrine yes Are ventilatedimproved double pit latrines affordable ? no Go to 3rd stage algorithm

  3. Third stage algorithm for Selection of SanitationTechnology Start Is water table more than 1 meterbelowground surface ? Is sufficient water available for pour-flush toilets ? Are plot sizes large enough for twoalternatingpit sites ? Are local anal cleaningmaterials for use with pour-flush toilets ? Is soilsufficientlypermeable ? Are pour-flush toiletsaffordable ? y y y yes y y Pour-flush toilets no no no no no no yes ROECs Are ROECs ? Are Reed OdorlessEarthClosets (ROEC) preferred over VIP ? yes yes Can latrine levelberaised ? no no no yes Are ventilatedimprovedpit latrines affordable ? VIP latrine no Comunalsanitationfacilities no Is theresufficientspace for a permanent double-pit system with a minimum of 1 yearstorage per vault ? yes yes Are ventilatedimproved double pit latrines affordable ? VIP double pit latrines no Vaults Is thereeither a municipal or private system for emptying latrines ? yes yes Are vaulttoiletsaffordable ? Communal sanitationfacilities no no

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