Table 2. Turbidity, fecal coliforms and E. coli results before and after environmental intervention per school.

Schools	Turbidity (uT)*		Faecal coliforms		Escherichia coli
	Before	After	Before	After	Before	After
4	1	361	Present	Present	Present	Absent
8	5	61	Present	Absent	Present	Absent
11	0	2	Present	Present	Present	Absent
16	1	151	Present	Absent	Present	Absent
17	71	2	Present	Present	Present	Absent
21	4	0	Present	Absent	Absent	Absent
29	2731	171	Present	Absent	Present	Absent
34	161	5	Present	Present	Present	Absent
36	3	5	Present	Present	Absent	Absent
38	1	1	Present	Absent	Present	Absent
39	0	0	Present	Absent	Present	Absent
42	4	4	Present	Absent	Absent	Absent
44	0	1	Present	Absent	Absent	Absent
45	361	61	Present	Present	Present	Absent
49	0	1	Present	Absent	Absent	Absent
50	1	101	Present	Absent	Present	Absent
54	1	5	Present	Absent	Present	Absent
63	0	5	Present	Absent	Present	Absent
64	5	2	Present	Absent	Absent	Absent
65	0	1	Present	Absent	Present	Absent

Notes:

^*Before: median = 1.0, 1st Qu. = 0.0, 3rd Qu. = 5.0; After: median = 4.5, 1st Qu. = 1.0, 3rd Qu. = 6.0.

¹Values greater than the maximum permitted value (> 5 units of turbidity).