Every lab on this page is listed by a state drinking water certification program. Filter by state, the tests you need, and whether the lab takes samples from homeowners, sells mail-in kits or accepts walk-in drop-offs.
950 certified labs
49er Water Laboratory
CA certified
- Coliform Bacteria
- Hardness
- Nitrate / Nitrite
A & B Environmental Services, Inc.
TX certified
- Arsenic
- Coliform Bacteria
- Full Homeowner Panel
- Hardness
- Iron and Manganese
- Lead
- Nitrate / Nitrite
- PFAS
- Volatile Organic Compounds
A & B Environmental Services, Inc. Golden Triangle
TX certified
- Nitrate / Nitrite
A & P Water Testing
NY certified
- Coliform Bacteria
A & R Laboratories, Inc.
CA certified
- Coliform Bacteria
A E Kirby Memorial Health Center
PA certified
Homeowner samples
- Coliform Bacteria
- Hardness
- Iron and Manganese
- Lead
- Nitrate / Nitrite
A.W. Research Laboratories, Inc.
MN certified
Homeowner samples · Mail-in kits
- Arsenic
- Coliform Bacteria
- Iron and Manganese
- Lead
- Nitrate / Nitrite
Abalone Coast Analytical, Inc.
CA certified
- Coliform Bacteria
ABE Laboratories LLC
PA certified
- Coliform Bacteria
- Hardness
- Nitrate / Nitrite
Abilene – Taylor County Public Health District
TX certified
Homeowner samples
- Coliform Bacteria
Absolute Laboratories, Inc.
MI certified
- Coliform Bacteria
- Nitrate / Nitrite
AC Analytical & Consulting LLC
MN certified
Homeowner samples · Mail-in kits
- Coliform Bacteria
- Nitrate / Nitrite