ED
Eurofins Derry
22 Manchester Rd, Derry, NH
Water testing labs in Rockingham County, NH
5 state-accredited water testing labs in Rockingham County, NH.
5 certified labsUpdated October 2026Source: state lab accreditation records
Source: New Hampshire DES accredited laboratory search (NHELAP), drinking water, list dated Oct 29, 2026. Find a Water Test is independent and not affiliated with the New Hampshire Department of Environmental Services. Certification covers specific tests, so confirm the lab is certified for the ones you need: Verify a certification.
5 certified labs near Rockingham County, NH
EP
Eurofins Portsmouth
124 Heritage Ave, Portsmouth, NH
NE
New England Radon Ltd
11 A Industrial Way Unit 3, Salem, NH
CL
Canobie Lake Water Treatment Plant Laboratory
161 North Policy St, Salem, NH
Public water system lab. Many don't accept private well samples, so call first.
DW
Derry Wastewater Treatment Plant
50 Transfer Station Road, Derry, NH
Public water system lab. Many don't accept private well samples, so call first.
Mail-in labs that ship to Rockingham County, NH
How mail-in testing worksNT
National Testing Laboratories (WaterCheck)
Ships nationwide
Single tests from $75; well and city packages $165 to $440
Certified in New Hampshire
TS
Tap Score by SimpleLab
Ships nationwide
About $189 to $1,125 (city and well kits, Oct 2026)
Testing service: sends your sample to a partner lab.
Bad result? Get help from water treatment pros near Rockingham County, NH
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Just need a lab? Every certified lab is listed above with directions.
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Well water guides
Common questions
Where can I test well water near Rockingham County, NH?
The state-accredited labs above serve Rockingham County, NH. Many offer sample bottles you collect at home.
What should I test for near Rockingham County, NH?
Start with total coliform bacteria and nitrates, then ask your county health department about local concerns.