Table 2 Annual Costs with 3% and 7% discount rates Annual Costs with Annual Costs with 3% discount rate 7 96 discount rate Table 4 Annual Total (Bladder and Lung) Cancer Cases Avoided Arsenic Level Reduced Mortality Reduced Morbidity Total Cancer Cases Cases Cases Avoided 3 32.6-74.1 24.6-64.2 57.2-138.3 5 29.1-53.7 22.0-46.5 51.1-100.2 10 21.3-29.8 16.1-25.9 37.4-55.7 20 10.2-11.3 8.5-8.8 19.0-19.8 Source: Federal Register, 2001, p. 7009,7011Table I MEAN ANNUAL COSTS PER HOUSEHOLD (in 1999 dollars) mm m m \"M\" m \"mm mm mm \"m Note: System size shows the number of households served by the system Table 3 Estimated Benefits from Reducing Arsenic in Drinking Water ($ millions 1999) Arsenic Level Total Quantified Health Benefits, Potential Nonquantified Health in Millions (Lower and Upper Benefits (Applies to All Levels) Bounds) $213.8$490.9 Skin cancer, kidney cancer u w $191.1-$355.6 Cancer of nasal passages, liver cancer 10 $139.6-$197.7 Prostate cancer, cardio-vascular effects 20 $66.2-$75.3 Pulmonary, neurological, endocrine effects