Items of Interest:

Statewide Ban on Importing Firewood
New Hampshire Division of Forests and Lands.
As of Jul 2011, New Hampshire has banned the importation of untreated firewood without a commercial or home heating compliance agreement. Firewood is a major source of damaging insects and diseases. This ban will help protect the health on New Hampshire's forests.

Formal collaboration against invasive plant species begins: New Group takes root in our coastal watershed (PDF | 161 KB) (May 20, 2008)
New Hampshire Department of Environmental Services.
Eleven state and federal agencies and nonprofit conservation groups announced today the Coastal Watershed Invasive Plant Partnership (CWIPP). The partnership's goal is to cooperate on assessing the extent and controlling invasive species in New Hampshire's coastal watershed, an area spanning 42 towns in Strafford and Rockingham counties.

See the New Hampshire Coastal Watershed Invasive Plant Partnership Agreement (Final; PDF | 193 KB) for more information.

State Specific Threats:

Nonindigenous Aquatic Species List - New Hampshire or Display NAS by Taxonomic Group (select State)
DOI. USGS. Southeast Ecological Science Center.
Includes fact sheets, maps and collection information.

State Noxious Weed List - New Hampshire
USDA. NRCS. National Plant Data Center. PLANTS Database.
Designated legally noxious plants.

Status of Invasive Plants - New Hampshire / Details by State and Details by County
University of Georgia. Center for Invasive Species and Ecosystem Health. Early Detection & Distribution Mapping System.

Pest Tracker - New Hampshire
USDA. APHIS. Cooperative Agricultural Pest Survey. National Agricultural Pest Information System.

Forest Threat Summary Viewer - New Hampshire
USDA. FS. Eastern Forest Environmental Threat Assessment Center.
See what threats (invasive plants, insects and diseases) are in my state.

States Restricting Firewood Movement and/or Advocating Leaving Firewood at Home: Who is Affected?
Don't Move Firewood.