Table 6-6 Estimated operating costs of some treatment methods, not including construction costs.

TREATMENT METHOD

ANNUAL COSTS (cents/1000 gallons)

Chlorine-Chloramines

0.4

Increased Coagulant Dose

5.2

Ozone-Chloramines

9.8

Granulated Activated Carbon
(a type of filtration)

18.0 - 28.0

Membranes/NF RO
(not including disposal costs)

92.0

Source: McGuire, et al., Disinfectants for Drinking Water Treatment - A White Paper, 1995.