| 1st Choice Pool & Spa Solutions | Castillo Ruiz David | — | (949) 355 9396 | Pool | Lake Forest · Orange County | — | — |
| 21pools INC | Cory Joe Reeder | — | (559) 786 6260 | Pool | Visalia · Tulare County | — | — |
| 21st Century Pool Maintenance | 21st Century Pool Maintenance | — | (619) 995 5105 | Pool | Santee · San Diego County | — | — |
| 3 Palms Pool And Spa | 3 Palms Pool And Spa | — | (951) 722 6002 | Pool | Moreno Valley · Riverside County | — | — |
| 365 Pros Pools INC | Fernando Ramirez | — | (661) 313 0870 | Pool | Paramount · Los Angeles County | — | — |
| 3lm Pool And Spa INC | Cruz Lazaro Merino Pioquinto | — | (818) 389 5771 | Pool | Sylmar · Los Angeles County | — | — |
| 3M Pools | Mario Mariscal Machaen | — | (909) 630 4300 | Pool | Jurupa Valley · Riverside County | — | — |
| 4 Seasons Pools INC | Castillo Nuno Rene Del | — | (707) 803 1975 | Pool | Vacaville · Solano County | — | — |
| 4 Way Pool Excavation INC | Alvarez Benjamin Ledezma | — | (760) 975 6334 | Pool | Escondido · San Diego County | — | — |
| 457 Pool INC | Bradley Edward Stanley | — | (310) 457 7665 | Pool | Malibu · Los Angeles County | — | — |
| 4K Pools | 4K Pools | — | (951) 522 3816 | Pool | Menifee · Riverside County | — | — |
| 5 Star Pool Plaster INC | Luz Maria Munoz | — | (925) 606 1812 | Pool | Modesto · Stanislaus County | — | — |
| 805 Custom Pools And Spas | 805 Custom Pools And Spas | — | (805) 798 7507 | Pool | Ventura · Ventura County | — | — |
| 831 Pool & Spa Service | Christopher Charles Platt | — | (831) 659 4966 | Pool | Pacific Grove · Monterey County | — | — |
| 951 Custom Pools INC | Luis Enriquez Medina | — | (951) 334 1983 | Pool | Perris · Riverside County | — | — |
| A & A Pool Plastering | Art Romo Valenzuela | — | (562) 942 9791 | Pool | Pico Rivera · Los Angeles County | — | — |
| A & A Pool Services | Kim Dong Bok | — | (714) 351 0532 | Pool | Buena Park · Orange County | — | — |
| A & B Creations Pool And Spa Remodeling INC | Perez Romero David | — | (714) 313 4551 | Pool | Corona · Riverside County | — | — |
| A & B Pool Maintenance | A & B Pool Maintenance | — | (408) 265 5521 | Pool | San Jose · Santa Clara County | — | — |
| A & E Pool DBA A & E Pool Care | Hugo Norberto Sanchez | — | (707) 227 0787 | Pool | American Canyon · Napa County | — | — |
| A & E Rodriguez LLC DBA Cecil Gunite | Alonso Ortega Rodriguez | — | (209) 462 2832 | Pool | Stockton · San Joaquin County | — | — |
| A & M Pool Service | Albert Rosario Jr Cerrone | — | (707) 778 0215 | Pool | Petaluma · Sonoma County | — | — |
| A & M Pool Service | Moreno Al | — | (949) 395 5381 | Pool | Oceanside · San Diego County | — | — |
| A & M Pools INC | James Edward Michaud | — | (562) 665 0845 | Pool | La Habra Heights · Los Angeles County | — | — |
| A & N Pools INC | James Kalwin Norris | — | (760) 340 2404 | Pool | Palm Desert · Riverside County | — | — |
| A & R Swimming Pool Co | Soo Il Park | — | (818) 363 1718 | Pool | Granada Hills · Los Angeles County | — | — |
| A & S Aquatic Solutions INC | Marco A Cisneros-moyao | — | (951) 454 9405 | Pool | Corona · Riverside County | — | — |
| A + Pool & Spa Service & Repair | Phillip Kenneth Miller | — | (916) 955 7566 | Pool | Elk Grove · Sacramento County | — | — |
| A - 1 Pools INC | Nicolas George Terlip | — | (909) 931 9396 | Pool | Upland · San Bernardino County | — | — |
| A Ablution Pool Service & Repair | Gary Lee Diaz | — | (559) 905 8011 | Pool | Fresno · Fresno County | — | — |
| A B C Pool And Spa Repairs | Dilia Lineth Herrarte | — | (818) 963 8842 | Pool | Canoga Park · Los Angeles County | — | — |
| A Clear Choice Pool And Spa Services INC | Lance Edward Sada | — | (951) 591 4900 | Pool | Menifee · Riverside County | — | — |
| A M K Pool Maintenance Company | Richard Lee Wolfe | — | (818) 522 5525 | Pool | Studio City · Los Angeles County | — | — |
| A P 1 Leak Detection INC | Joe Luis| Aguilar-saldana Jose L Aguilar | — | (818) 675 2135 | Pool | Canyon Country · Los Angeles County | — | — |
| A Plus Pool & Spa INC | John Patrick Fetcko | — | (707) 575 4360 | Pool | Santa Rosa · Sonoma County | — | — |
| A Plus Pool Service | Joshua Barton Vance | — | (916) 899 4623 | Pool | Citrus Heights · Sacramento County | — | — |
| A S Pool And Spa Maintenance | Andres Gutierrez Vega | — | (669) 639 0319 | Pool | Soquel · Santa Cruz County | — | — |
| A To Z Pool Construction & Remodeling | Unanyan Gayk | — | (818) 517 0238 | Pool | Van Nuys · Los Angeles County | — | — |
| A To Z Pool Repairs INC | Christopher James Zimmer | — | (760) 567 8451 | Pool | Desert Hot Springs · Riverside County | — | — |
| A Touch Of Splash INC | Ronald Carl Friedrichsen | — | (707) 769 1095 | Pool | Petaluma · Sonoma County | — | — |