privatewelldata / Certified labs
Certified labs – California ELAP accreditation
194 labs. Updated 2026-10-17. Source : California Water Boards – ELAP drinking water accredited laboratories.
Include labs that likely serve only public water systems
Accepts private well samples (listed) Certified lab Public systems only
Well water testing by state
Each state page links to that state’s official certified-lab list and adds lab counts, tests and county well data where we have them.
Los Angeles, California · (323) 254-7700
Jackson, California · (530) 277-2770
Ontario, California · (951) 779-0310
Modesto, California · (510) 979-1979
Fremont, California · (510) 979-1979
Anaheim, California · (562) 860-2201
Kelso, Washington · (360) 577-7222
Houston, Texas · (281) 530-5656
Signal Hill, California · (562) 206-2770
Davis, California · (530) 753-5456
Las Vegas, Nevada · (702) 307-2659
Cerritos, California · (562) 219-7436
Sacramento, California · (702) 882-6303
Chino Hills, California · (909) 393-3330
San Luis Obispo, California · (805) 595-1080
Romulus, Michigan · (734) 629-8161
Signal Hill, California · (562) 989-4045
Cuyahoga Falls, Ohio · (330) 253-8211
Tustin, California · (714) 832-0064
Petaluma, California · (707) 769-3128
Livermore, California · (707) 769-3128
Elk Grove, California · (707) 769-3128
Signal Hill, California · (424) 267-5032
Vista, California · (760) 536-3352
Ukiah, California · (707) 468-0401
Cerritos, California · (562) 809-8880
Midlothian, Virginia · (804) 763-1200
Belleville, Illinois · (618) 222-4055
El Segundo, California · (310) 322-4993
San Diego, California · (619) 871-8505
Vista, California · (760) 295-0430
Long Beach, California · (562) 495-9500
Ventura, California · (805) 643-5621
Ventura, California · (805) 650-0546
Oakland, California · (510) 704-8930
Fresno, California · (559) 497-2888
Bakersfield, California · (661) 327-0671
Sacramento, California · (559) 497-2888
San Bernardino, California · (559) 497-2888
El Centro, California · (951) 653-3351
Riverside, California · (951) 653-3351
Norwell, Massachusetts · (781) 681-5565
Sacramento, California · (916) 550-1048
Morgan Hill, California · (669) 258-5821
Brawley, California · (760) 623-1556
Santa Rosa, California · (707) 544-8807
Gilroy, California · (408) 848-3619
Rancho Cordova, California · (916) 638-7301
Napa, California · (707) 258-4000
Ventura, California · (805) 644-1095
Wilmington, North Carolina · (910) 795-0421
San Francisco, California · (415) 882-1690
Escalon, California · (209) 847-3800
El Dorado Hills, California · (916) 932-5011
Turlock, California · (209) 664-1100
Kettleman City, California · (559) 386-6138
San Jose, California · (408) 441-0962
Lompoc, California · (805) 737-7300
Grand Terrace, California · (909) 825-7693
Sacramento, California · (916) 379-2323
San Luis Obispo, California · (805) 781-5507
Grass Valley, California · (530) 273-7284
Rosemont, Illinois · (847) 430-1219
Datalab
CASan Jose, California · (408) 943-1888
Fresno, California · (559) 233-6129
San Carlos, California · (650) 799-9204
Torrance, California · (310) 618-8889
Phoenix, Arizona · (480) 940-5294
San Leandro, California · (510) 895-3675
Cinnaminson, New Jersey · (800) 220-3675
Carle Place, New York · (516) 997-7251
Saint Louis, Missouri · (856) 858-4800
Indianapolis, Indiana · (317) 803-2997
San Diego, California · (800) 220-3675
Phoenix, Arizona · (602) 276-4344
South Pasadena, California · (323) 254-9960
Oak Ridge, Tennessee · (865) 481-0683
Billings, Montana · (406) 252-6325
Casper, Wyoming · (307) 235-0515
Pomona, California · (909) 590-5905
Orange, California · (714) 937-0750
North Chesterfield, Virginia · (804) 275-4788
San Diego, California · (858) 266-1666
Irvine, California · (949) 679-9500
Irvine, California · (949) 322-8335
Glendale, California · (833) 465-5857
Pomona, California · (623) 298-1015
Folsom, California · (415) 377-0751
Tustin, California · (523) 298-1015
Emeryville, California · (510) 653-0824
Burlingame, California · (623) 298-1015
San Diego, California · (714) 837-5866
Pasadena, Texas · (713) 290-0221
Cary, North Carolina · (919) 481-1413
Arvada, Colorado · (303) 736-0100
Carrollton, Texas · (972) 242-7750
Stafford, Texas · (281) 240-4200
Lancaster, Pennsylvania · (717) 656-2300
Memphis, Tennessee · (901) 213-2447
Tustin, California · (714) 892-0208
Pittsburgh, Pennsylvania · (412) 963-7058
Pomona, California · (626) 386-1100
West Sacramento, California · (916) 373-5600
West Sacramento, California · (626) 386-1221
Tacoma, Washington · (253) 922-2310
South Bend, Indiana · (574) 233-4777
Earth City, Missouri · (314) 298-8566
Tustin, California · (714) 895-5494
Cypress, California · (714) 657-7527
Chico, California · (530) 343-5818
Stockton, California · (209) 942-0182
Visalia, California · (559) 734-9473
Santa Paula, California · (805) 392-2000
San Luis Obispo, California · (805) 783-2940
Charleston, South Carolina · (843) 556-8171
Burlingame, California · (650) 697-5811
Hesperia, California · (760) 244-3481
San Diego, California · (858) 203-8145
Union, New Jersey · (908) 688-7800
Modesto, California · (209) 538-8111
Pittsburgh, Pennsylvania · (412) 922-4000
Rancho Dominguez, California · (714) 707-0612
Santa Fe Springs, California · (714) 449-9937
Santa Rosa, California · (707) 527-7574
Huntington Beach, California · (714) 828-4999
Lodi, California · (209) 339-1990
Costa Mesa, California · (714) 850-4830
Pittsburg, California · (925) 252-9262
National City, California · (619) 831-8100
Commerce, California · (562) 928-0553
Rancho Cordova, California · (916) 567-9808
Arcata, California · (707) 822-4649
Marietta, Ohio · (740) 373-4071
Turlock, California · (707) 822-4649
Monterey, California · (831) 375-6227
Salinas, California · (831) 755-4516
Farmers Branch, Texas · (972) 241-8460
Long Beach, California · (562) 726-3365
Fresno, California · (559) 268-7021
Fairfield, California · (707) 784-4410
Ypsilanti, Michigan · (734) 483-8333
San Diego, California · (858) 587-7333
Santa Maria, California · (805) 922-4772
El Dorado Hills, California · (916) 673-1520
Orange, California · (714) 771-6900
Wilmington, North Carolina · (910) 212-5856
Anaheim, California · (714) 771-6900
Thousand Oaks, California · (818) 734-6230
Anderson, California · (530) 782-4291
Las Vegas, Nevada · (615) 703-1123
12065 Lebanon Road, Tennessee · (615) 758-5858
Minneapolis, Minnesota · (612) 607-1700
Mansfield, Massachusetts · (508) 898-9220
Ormond Beach, Florida · (386) 676-4803
Redding, California · (530) 999-4051
West Columbia, South Carolina · (803) 227-2702
Mansfield, Massachusetts · (508) 898-9220
Bakersfield, California · (661) 327-4911
Greensburg, Pennsylvania · (724) 850-5630
Fairfield, California · (707) 207-7760
San Fernando, California · (800) 400-5227
Signal Hill, California · (805) 809-1041
Los Angeles, California · (213) 745-5312
Stockton, California · (209) 405-0601
Twain Harte, California · (209) 477-8105
Houston, Texas · (713) 680-9425
Las Vegas, Nevada · (510) 266-8183
Carson, California · (310) 763-2374
Hayward, California · (510) 266-8183
Scott, Louisiana · (337) 207-1724
Wilmington, North Carolina · (910) 667-0134
Clovis, California · (559) 862-2118
Orlando, Florida · (407) 425-6700
Wheat Ridge, Colorado · (303) 425-6021
Reno, Nevada · (775) 857-2400
San Mateo, California · (650) 573-2500
N. Chesterfield, Virginia · (804) 897-1177
Richmond, Virginia · (804) 353-6778
Dallas, Texas · (214) 213-4889
Laguna Hills, California · (949) 348-9389
Tulare, California · (559) 686-2070
Sacramento, California · (916) 369-7688
Klamath Falls, Oregon · (541) 882-6286
Signal Hill, California · (562) 426-0199
Lake Forest, California · (949) 297-5020
Windsor, Connecticut · (860) 817-5101
Milpitas, California · (408) 263-5258
San Diego, California · (306) 880-4452
San Diego, California · (858) 300-4350
City of Industry, California · (626) 336-2139
Chino, California · (909) 627-3628
Las Vegas, Nevada · (705) 355-0202
Compton, California · (310) 537-7100
Bakersfield, California · (661) 395-0539
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