Lead (1978) Nonattainment Area Partial County DescriptionsData is current as of September 30, 2019
Detailed Description of Certain Area Boundaries for Partial Counties
East Helena Area (Lewis and Clark Co.), MT
Lewis and Clark County
Northern boundary - Horizontal Universal Transverse Mercatur(UTM) 5,162,000 mN; eastern boundary - vertical UTM 432,500 mE; southern boundary - horizontal UTM 5,158,000 mN; western boundary - vertical UTM 427,000 mE.