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