Counties We Cover in New Hampshire

Start from the county. In New Hampshire, 3 counties fall inside the metros PestReach USA covers — the Manchester areas among them — adding up to about 1,939 square miles. Pest pressure is read at this level because it is the level providers work at: routes, licensing and local rules all resolve to county and metro long before they resolve to state.

Read down the list and the pattern is geographic: the counties nearest a metro core carry its density problems, the outer counties carry the edge-of-development ones — new subdivisions against farmland and woodland — and every county page on this index sets out which pattern applies there, and why.

By land, the covered counties run from Hillsborough County (877 sq mi), Rockingham County (695 sq mi), Strafford County (367 sq mi) down to Strafford County at about 367 square miles. The metros anchoring coverage are Manchester (metro population 433,415; 1 covered county in New Hampshire). Hold those two scales together — the county's land and the metro's weight — and the county pages below read plainly: pressure follows the metro, exposure follows the land, and providers plan for both.

The state's pest calendar is anchored by its largest metro, Manchester: about 40 inches of precipitation a year, an average temperature near 50°F, roughly 16 days at 90°F or above and 129 days at or below freezing. Every county in this index lives inside that weather pattern, adjusted by its own distance from the metro core.