Code	Distance to latrine < 10 m	Well covered	Bucket & rope	Animal breeding close to well	Damage apron	Well not lined	Conta. rope/bucket	Marshy area	NO₃ > 50 mg/L	E-coli present	Total Risk score (%)
S1	No	No	Yes	No	Yes	No	No	No	No	No	40
S2	No	No	Yes	No	Yes	No	No	No	Yes	No	40
S3	Yes	Yes	Yes	Yes	No	No	Yes	No	No	No	40
S4	Yes	Yes	Yes	Yes	No	No	Yes	No	No	No	40
S5	Yes	Yes	No	No	No	No	No	No	Yes	No	20
S6	No	No	Yes	No	No	No	No	No	Yes	No	30
S7	Yes	Yes	Yes	No	No	No	No	No	No	No	20
S8	No	No	Yes	No	No	No	No	Yes	No	Yes	40
S9	No	Yes	Yes	No	No	No	No	No	No	Yes	20
S10	No	Yes	Yes	Yes	No	No	No	No	No	No	20
S11	No	No	Yes	No	No	No	No	No	Yes	No	30
S12	Yes	Yes	Yes	Yes	No	Yes	Yes	No	No	Yes	50
S13	Yes	Yes	Yes	No	Yes	No	No	No	Yes	No	40
S14	Yes	Yes	Yes	No	No	No	Yes	No	Yes	Yes	50
S15	Yes	No	Yes	Yes	No	No	No	No	Yes	No	50
S16	Yes	Yes	Yes	No	No	No	No	Yes	Yes	No	40
S17	No	Yes	Yes	Yes	No	Yes	No	No	Yes	No	40
S18	Yes	Yes	Yes	No	Yes	No	No	No	No	Yes	40
S19	No	No	Yes	Yes	Yes	No	No	No	No	No	40
S20	Yes	Yes	Yes	No	No	No	No	No	Yes	No	30
S21	Yes	Yes	No	No	No	No	Yes	No	No	No	20
S22	Yes	Yes	Yes	No	No	Yes	Yes	No	Yes	No	50
S23	Yes	Yes	Yes	No	No	No	Yes	No	No	Yes	40
S24	No	No	Yes	No	No	No	Yes	Yes	Yes	Yes	60
S25	Yes	No	Yes	Yes	Yes	No	No	No	Yes	Yes	60
S26	Yes	Yes	Yes	Yes	No	Yes	Yes	No	No	No	50
S27	No	Yes	Yes	Yes	No	Yes	No	No	No	Yes	40
S28	No	No	Yes	Yes	No	Yes	No	Yes	No	Yes	60
S29	Yes	Yes	No	No	No	No	No	Yes	Yes	No	30
S30	Yes	Yes	Yes	No	Yes	Yes	No	No	No	Yes	20
										Min	20
										Max	60
										Mean	38.33
										Stdev	12.34