CE
Cardinal Environmental Lab, LLC
2870 Salt Springs Road, Youngstown, OH
Water testing labs in Mahoning County, OH
3 state-accredited water testing labs in Mahoning County, OH.
3 certified labsUpdated October 2026Source: state lab accreditation records
Source: Ohio EPA list of labs certified for public drinking water, list dated Oct 1, 2026. Find a Water Test is independent and not affiliated with Ohio EPA. Certification covers specific tests, so confirm the lab is certified for the ones you need: Verify a certification or call Ohio EPA lab certification at (614) 644-2752.
3 certified labs near Mahoning County, OH
SW
Sebring Water Department Laboratory
1191 Knox School Road, Beloit, OH
Public water system lab. Many don't accept private well samples, so call first.
MC
Mahoning County Board of Health
50 Westchester Drive, Youngstown, OH
Public water system lab. Many don't accept private well samples, so call first.
Mail-in labs that ship to Mahoning County, OH
How mail-in testing worksNT
National Testing Laboratories (WaterCheck)
Ships nationwide
Single tests from $75; well and city packages $165 to $440
Not on Ohio's certified list. Fine for a general check; for a home sale or an official result, use a Ohio-certified lab.
TS
Tap Score by SimpleLab
Ships nationwide
Single-contaminant kits from about $145; full well and city panels about $300 to $870
Testing service: sends your sample to a partner lab.
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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 Mahoning County, OH?
The state-accredited labs above serve Mahoning County, OH. Many offer sample bottles you collect at home.
What should I test for near Mahoning County, OH?
Start with total coliform bacteria and nitrates, then ask your county health department about local concerns.