Water purification, distribution and sewage disposal for Peace Corps volunteers 
Section 8: The privy method of excreta disposal design for a village 

THE PRIVY METHOD OF EXCRETA DISPOSAL
DESIGN FOR A VILLAGE
LESSON NO. 1
LESSON OBJECTIVE: Outline the factors that must be considered in designing a village privy system.
TOPIC 
INSTRUCTIONAL PROCEDURE 
SUPPLEMENTAL MATERIALS/RELATED READING 
Sanitary Survey 
Recall the need for a sanitary survey. 
WHO Monograph Series #39 p. 158155. 
Outline the essential elements of this survey. 

Demonstrate estimating the volume of pits, holes and tanks. 

The Pit Privy 
Discuss the function of the basic components of a pit privy. 
WHO Monograph Series #3 p. 4376. 
Illustrate the designs and components for three types of pit privies. 

Sanitary Survey 
Discuss how to determine the adequacy of the present system. 
See Section 7 
Assemble students to conduct a survey of a rural area. This survey must 

1) designate the population and its distribution 

2) determine the practice of hygiene in this erect indicated from the present type(s) of facilities implemented 

3) state where present facilities are improperly located, poorly maintained and not used 

4) estimate the health of the community from records of communicable diseases, intestinal infections (diseases caused by worms) and acute conjunctivitus in infects (inflammation of the mucus membrane around the eyeball) and cite the death and debility statistics 

5) identify what type(s) of privies are presently used (public or private; distribution and use) and determine the location of these facilities with respect to water supply systems. 

6) designate the number of new installations needed and where they should be located 

7) define the average income of the community members 

8) estimate the cooperation available from agencies or groups for training and health education of the public 

9) determine what materials are available locally, their costs, whether potential resources for selfhelp are available and if the needed craftsmen are available locally and their wages 

10) state what type(s) of privies would be the most economically feasible. 

Assemble students for discussion of survey findings. 
THE PRIVY METHOD OF EXCRETA DISPOSAL
DESIGN FOR A VILLAGE
LESSON NO. 2
LESSON OBJECTIVE: Set up and carry out a program to construct a privy system.
TOPIC 
INSTRUCTIONAL PROCEDURE 
SUPPLEMENTAL MATERIALS/RELATED READING 
Selection of Privy System 
Assemble students to visit the present facilities to determine the type(s) of facilities presently implemented. 

Review the criteria to be used in the selection of a village privy system. 

Select the most feasible privy designs. 

Discuss how to prepare a plan toward the finances for the system. 

Instruction techniques 
Outline the logical sequences of construction for the privy type selected. 
For construction techniques see Section IIC 
Have students assemble the tools and materials for the construction of this privy type. 

Set up a program (allocate construction tasks to the students) for the construction of a privy of the type selected. 

Supervise students in the construction of this privy 