1
SANITATION
2
CLEAN
3
WATER
4
HYGIENE
5
DISINFECTION
6
FILTRATION
7
CHLORINATION
8
PURIFICATION
D
W
I
U
B
H
U
L
O
N
O
F
P
O
I
M
D
F
F
V
R
O
C
M
U
U
H
I
S
H
N
Y
I
I
G
L
D
Z
R
A
Y
I
I
W
F
T
A
O
E
R
L
I
C
T
G
U
N
A
I
W
T
A
M
L
F
H
A
I
I
T
F
Y
N
G
N
K
A
I
E
M
T
I
E
F
E
C
L
C
O
I
C
L
E
N
W
J
N
P
C
A
E
I
A
A
V
A
I
I
F
R
E
I
T
S
M
C
T
S
U
K
U
M
M
Z
E
Z
I
K
U
I
C
H
L
O
R
I
N
A
T
I
O
N
O
V
U
Z
Z
M
W
A
T
E
R
A
N
N
F
I
L
T
R
A
T
I
O
N
P
V
E