Regional Coverage

St. Louis Observer

Covering Greater St. Louis & Rural Missouri
Jefferson County  |  South Metro Corridor  |  Franklin County Hub
Jefferson County, Missouri  •  Regional Coverage Hub

Jefferson County, Missouri: South Metro Communities Along I-55 and the Meramec

Jefferson County occupies the southern tier of the St. Louis metropolitan area — a county that transitions from the dense suburban development of Arnold and Imperial immediately south of St. Louis County to the rural hill country of the Ozark Plateau as you move south toward Festus and the Jefferson County seat at Hillsboro. The Meramec River and its tributaries define much of the county's western landscape and pest environment.

Arnold, MO

Jefferson County's most populous city, immediately south of St. Louis County along I-55 and the Meramec River.

Read Arnold Guide →

Imperial, MO

Unincorporated community along US-61/67 between Arnold and Festus with established residential character.

Read Imperial Guide →

Festus, MO

Jefferson County's commercial center, paired with Crystal City along the Mississippi River bluffs.

Read Festus Guide →

Jefferson County Pest Environment

Jefferson County's pest environment varies significantly by location within the county. The northern tier — Arnold, Imperial, and the communities immediately south of St. Louis County — has a suburban pest profile consistent with south St. Louis County: postwar residential housing, established landscaping, Meramec River bottomland mosquito pressure, and the termite and moisture pest conditions common to the county's clay and loam soils.

The southern and eastern portions of the county — further from the interstate corridors and St. Louis County adjacency — transition to the rural pest profile: greater wildlife pressure, higher tick density from the Ozark Plateau terrain, and the full range of rural Missouri pest conditions that D&D Pest Control has been managing from Gerald in adjacent Franklin County for over 30 years.

The Meramec River, which flows along the western portion of Jefferson County before turning north through St. Louis County, defines the pest environment for communities along its corridor — creating the mosquito breeding habitat, the wildlife movement corridor, and the post-flood pest displacement events that are characteristic of river-adjacent communities throughout the region. D&D Pest Control serves Jefferson County and the south metro corridor — visit ddpestcontrolmo.com.