| Business | Phone |
| Delta Pure Water Inc 41 Sand Creek Rd # A, Brentwood 94513 | (925) 634-6658 |
| Culligan Brentwood 94513 | (925) 634-6311 |
| Ecowater Systems 8580 Brentwood Blvd, Brentwood 94513 | (925) 513-2373 |
| Pure Water Etc 925 Yardley Pl, Brentwood 94513 | (925) 788-8179 |
| Storm Water Inspctn Mntnc Svc Brentwood 94513 | (925) 516-8966 |