Soil labs by state
New Hampshire
New Hampshire homeowners use UNH Cooperative Extension for routine soil testing rather than a separate state-agency homeowner lab. The official soil-testing pages point residents to the Durham lab for mail or in-person/drop-box submission, and UNH Extension’s locations page lists the county offices across all 10 counties.
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
- State soil lab
- UNH Cooperative Extension Soil Testing Service
- Lab website
- Official page →
- Basic test price
- $25 per sample
- Find your county Extension office
- Official page →
Official resources in New Hampshire
Main official page for homeowner soil testing, including current submission options, mailing address and links to forms and pricing.
Provides the Home, Grounds and Garden form and explains which form homeowners should use.
Gives sample-collection instructions, what to include, and confirms mail and drop-off submission pathways.
Official 2026 UNH Extension update listing current soil-test fees, including the standard gardening test price.
County office finder page for locating UNH Extension offices around New Hampshire.
Key facts for New Hampshire
- UNH Extension says it accepts soil samples both in person and by mail.
- Mail-in samples go to UNH Extension Soil Testing Service, Barton Hall B206, 34 Sage Way, Durham, NH 03824.
- Official drop-off options are blue bins outside Barton 206 and a 24/7 outdoor drop box in the Sage Way parking lot by Barton Hall.
- The standard gardening test costs $25 per sample as of April 1, 2026.
- Homeowners should use the Home, Grounds and Garden form for vegetable gardens, lawns, fruits, annuals, perennials, trees and shrubs.
- UNH Extension’s locations page lists county offices plus the soil-testing lab location.
What to do next
- Download the Home, Grounds and Garden form, fill in the crop code, and include payment before mailing or dropping off your sample.
- Collect 6-8 subsamples from the area, mix them, air-dry the soil, and submit 1 cup in a labeled zip-lock bag.
- Use the UNH Extension Locations page to find your county office for local gardening help, but submit soil samples using the Durham lab instructions on the soil-testing pages.
Helpful guides
- How to take a soil sample for a lab test
- University soil labs vs. private labs vs. home kits
- How to read a soil test report
- Soil pH and lime: what your test is telling you