8 providers on record in Contra Costa County. For the recorded septic documents themselves, see septic records for Contra Costa County, California.
| Company | City | Phone | Rating |
|---|---|---|---|
| Sewer Works | Hercules | (510) 778-5259 | 5.0 (83) |
| American Eagle Plumbing & Construction | El Sobrante | (510) 253-8049 | 5.0 (3) |
| Bay Area Septic Tech | Walnut Creek | (925) 878-1101 | 5.0 (1) |
| Advanced Trenchless | Martinez | (925) 932-4023 | 4.8 (256) |
| Stoddard Plumbing | Concord | (925) 825-5559 | 4.7 (23) |
| 8A Underground Pipeline | Orinda | (916) 883-9888 | — |
| Diablo Excavation & Construction | Discovery Bay | (925) 628-8877 | — |
| Drainline Plumbing & Trenchless Sewer Specialists | Richmond | (510) 299-6696 | — |
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