Certified labs near Napa, California

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Caltest Analytical Laboratory

Napa, California · (707) 258-4000

9 mi away

Fairfield, California · (707) 207-7760

11 mi away

Fairfield, California · (707) 784-4410

16 mi away

Petaluma, California · (707) 769-3128

25 mi away

Santa Rosa, California · (707) 544-8807

26 mi away

Santa Rosa, California · (707) 527-7574

28 mi away

Pittsburg, California · (925) 252-9262

28 mi away

Oakland, California · (510) 704-8930

32 mi away

Emeryville, California · (510) 653-0824

32 mi away

Davis, California · (530) 753-5456

37 mi away

San Leandro, California · (510) 895-3675

41 mi away

West Sacramento, California · (916) 373-5600

46 mi away

Every year: bacteria (total coliform and E. coli), nitrate, pH and total dissolved solids — CDC

Many labs accept mailed samples, so a lab a few hours away may still work for you.