Best Well Water Testing in Los Angeles, CA
Compare 29 local well water testing providers in Los Angeles. Verified listings with real contact info.
29 services listed
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Quest Diagnostics
420 E 3rd St Ste 802, Los Angeles, CA 90013
Monday: 8:30 AM – 12:30 PM, 1:30 – 4:30 PM | Tuesday: 8:30 AM – 12:30 PM, 1:30 – 4:30 PM | Wednesday: 8:30 AM – 12:30 PM | Thursday: 8:30 AM – 12:30 PM, 1:30 – 4:30 PM | Friday: 8:30 AM – 12:30 PM, 1:30 – 4:30 PM | Saturday: Closed | Sunday: Closed
3.6 ★
86 reviews
UGE-ECS, Inc.
221 S Figueroa St #310, Los Angeles, CA 90012
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
3 ★
2 reviews
Geo Forward
445 S Figueroa St suite 3100, Los Angeles, CA 90071
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
5 ★
5 reviews
Fast Mold Testing - Los Angeles
515 Flower St, Los Angeles, CA 90071
Monday: Open 24 hours | Tuesday: Open 24 hours | Wednesday: Open 24 hours | Thursday: Open 24 hours | Friday: Open 24 hours | Saturday: Open 24 hours | Sunday: Open 24 hours
Terra-Petra Environmental Engineering
700 Flower St Suite 2580, Los Angeles, CA 90017
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
5 ★
1 reviews
City Of Angels Mold Inspections
811 Wilshire Blvd, Los Angeles, CA 90017
Monday: Open 24 hours | Tuesday: Open 24 hours | Wednesday: Open 24 hours | Thursday: Open 24 hours | Friday: Open 24 hours | Saturday: Open 24 hours | Sunday: Open 24 hours
5 ★
10 reviews
Red Leaf Environmental
939 S Broadway Apartment 711, Los Angeles, CA 90015
Monday: 8:00 AM – 5:30 PM | Tuesday: 8:00 AM – 5:30 PM | Wednesday: 8:00 AM – 5:30 PM | Thursday: 8:00 AM – 5:30 PM | Friday: 8:00 AM – 5:30 PM | Saturday: 8:00 AM – 5:30 PM | Sunday: 8:00 AM – 5:30 PM
5 ★
32 reviews
Quest Diagnostics
1632 E Cesar E Chavez Ave, Los Angeles, CA 90033
Monday: 6:00 AM – 3:00 PM | Tuesday: 6:00 AM – 3:00 PM | Wednesday: 6:00 AM – 3:00 PM | Thursday: 6:00 AM – 3:00 PM | Friday: 6:00 AM – 3:00 PM | Saturday: Closed | Sunday: Closed
3.2 ★
138 reviews
Positive Lab Services
781 E Washington Blvd, Los Angeles, CA 90021
Monday: 7:30 AM – 5:00 PM | Tuesday: 7:30 AM – 5:00 PM | Wednesday: 7:30 AM – 5:00 PM | Thursday: 7:30 AM – 5:00 PM | Friday: 7:30 AM – 4:00 PM | Saturday: Closed | Sunday: Closed
4 ★
4 reviews
California Efficiency Group
917 W 17th St, Los Angeles, CA 90015
4.3 ★
257 reviews
LA Testing
520 Mission St, South Pasadena, CA 91030
Monday: 8:00 AM – 6:00 PM | Tuesday: 8:00 AM – 6:00 PM | Wednesday: 8:00 AM – 6:00 PM | Thursday: 8:00 AM – 6:00 PM | Friday: 8:00 AM – 6:00 PM | Saturday: 9:00 AM – 5:00 PM | Sunday: 9:00 AM – 5:00 PM
4.4 ★
29 reviews
KNIGHT ENVIRONMENTAL CONSULTING of Beverly Hills - Mold Testing and Inspection
8383 Wilshire Blvd Suite 800, Unit 10, BEVERLY Hills
Monday: Open 24 hours | Tuesday: Open 24 hours | Wednesday: Open 24 hours | Thursday: Open 24 hours | Friday: Open 24 hours | Saturday: Open 24 hours | Sunday: Open 24 hours
4.8 ★
47 reviews
Water Intrusion Specialist
35 N Lake Ave # 710, Pasadena, CA 91101
Monday: 9:00 AM – 3:00 PM | Tuesday: 9:00 AM – 3:00 PM | Wednesday: 9:00 AM – 3:00 PM | Thursday: 9:00 AM – 3:00 PM | Friday: 9:00 AM – 3:00 PM | Saturday: Closed | Sunday: Closed
4.8 ★
16 reviews
Express Air Testing Inc.
3900 W Alameda Ave Suite 1534, Burbank, CA 91505
Monday: 8:00 AM – 6:00 PM | Tuesday: 8:00 AM – 6:00 PM | Wednesday: 8:00 AM – 6:00 PM | Thursday: 8:00 AM – 6:00 PM | Friday: 8:00 AM – 6:00 PM | Saturday: 8:00 AM – 2:00 PM | Sunday: Closed
4.7 ★
12 reviews
SUEZ Mobile Water
7777 Industry Ave, Pico Rivera, CA 90660
5 ★
4 reviews
Clean Water Technology
13008 S Western Ave, Gardena, CA 90249
Monday: 9:00 AM – 5:00 PM | Tuesday: 9:00 AM – 5:00 PM | Wednesday: 9:00 AM – 5:00 PM | Thursday: 9:00 AM – 5:00 PM | Friday: 9:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
5 ★
1 reviews
Precision Backflow Testing & Repairs
1409 Foothill Blvd Unit 202, La Cañada Flintridge, CA 91011
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: 8:00 AM – 5:00 PM | Sunday: Closed
5 ★
19 reviews
Pace Analytical Building Sciences
3565 Lexington Ave, El Monte, CA 91731
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
5 ★
3 reviews
EAG Laboratories
250 N Nash St, El Segundo, CA 90245
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Open 24 hours
4.3 ★
9 reviews
Wallace Laboratories
365 Coral Cir, El Segundo, CA 90245
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
4.5 ★
15 reviews
JLM Environmental
15200 Grevillea Ave B, Lawndale, CA 90260
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: 8:00 AM – 4:00 PM | Sunday: Closed
4.7 ★
126 reviews
Weck Laboratories, Inc.
14859 Clark Ave, Hacienda Heights, CA 91745
Monday: 8:00 AM – 5:30 PM | Tuesday: 8:00 AM – 5:30 PM | Wednesday: 8:00 AM – 5:30 PM | Thursday: 8:00 AM – 5:30 PM | Friday: 8:00 AM – 5:30 PM | Saturday: 8:00 AM – 12:00 PM | Sunday: Closed
4.3 ★
28 reviews
Western Analytical Laboratory
12734 Branford St STE 19, Arleta, CA 91331
Monday: 9:00 AM – 5:00 PM | Tuesday: 9:00 AM – 5:00 PM | Wednesday: 9:00 AM – 5:00 PM | Thursday: 9:00 AM – 5:00 PM | Friday: 9:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
4.9 ★
48 reviews
AQ Environmental Laboratories
1508 E 33rd St, Signal Hill, CA 90755
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
5 ★
4 reviews
Pat-Chem Laboratories
1824 1st St, San Fernando, CA 91340
Monday: 7:00 AM – 5:00 PM | Tuesday: 7:00 AM – 5:00 PM | Wednesday: 7:00 AM – 5:00 PM | Thursday: 7:00 AM – 5:00 PM | Friday: 7:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
4.4 ★
10 reviews
West Coast Environmental Testing
11024 Balboa Blvd Suite 757, Granada Hills, CA 91344
Monday: 8:00 AM – 8:00 PM | Tuesday: 8:00 AM – 8:00 PM | Wednesday: 8:00 AM – 8:00 PM | Thursday: 8:00 AM – 8:00 PM | Friday: 8:00 AM – 8:00 PM | Saturday: 8:00 AM – 8:00 PM | Sunday: 8:00 AM – 8:00 PM
5 ★
3 reviews
Environment Associates, Inc
9604 Variel Ave, Chatsworth, CA 91311
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
4.6 ★
14 reviews
Eurofins Environment Testing- Pomona
941 Corporate Center Dr, Pomona, CA 91768
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
4.6 ★
8 reviews
Waypoint Analytical California
4741 E Hunter Ave Suite A, Anaheim, CA 92807
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
4.8 ★
6 reviews
Frequently Asked Questions
What should I test my well water for in California?
**CDPH** and **CalEPA** recommend testing annually for coliform bacteria and nitrates at minimum. Given regional contamination history in parts of California, also test for **TCE/PCE**, **hexavalent chromium**, **perchlorate**, and **1,2,3-TCP**, plus lead, arsenic, volatile organic compounds (VOCs), iron, manganese, and pH. Check with **CDPH**, **CalEPA**, and your **county Environmental Health** office for contaminants of concern in your area.
How often should well water be tested in California?
Test annually for bacteria and nitrates. Comprehensive testing every 2-3 years is recommended. Test immediately after any flooding event, if you notice changes in taste, odor, or color, or if you receive a notice about contamination in your area from local authorities.
Where can I get my well water tested in California?
Use a state-certified laboratory. Your local board of health, state university cooperative extension office, or environmental watch program can provide sampling kits and recommend certified labs. Some well service companies also partner with certified labs.
How much does well water testing cost in California?
Basic bacterial and nitrate testing costs $75-$150. A standard potable water panel (bacteria, nitrates, pH, iron, manganese, hardness) costs $150-$300. Extended testing for specific contaminants adds $150-$300 per sample. A comprehensive panel including multiple contaminant types costs $400-$700.