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Table 5: Preliminary evaluation of options for applying the proposed standard (approximate estimates)

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Option

Systems affected (estimated)

Average annual total costs ($ million)

Potential annual public health benefits ($ million)

Annual environmental benefits

Benefit:cost ratio (excluding environmental benefits)

Targeted application of NES

42,000

$3.4–$5.2

$0.75–$3

Unquantified
Tick. Tick.

0.20–0.52

Everyone everywhere (DISCARDED)

255,000

$21–$31

$1.5–$6

Unquantified
Tick. Tick. Tick.

0.064–0.17