Western Water Works Supply Company Safety Record
DOT# 138898 · Chino Hills, CA 91709 · 9095977000
Excellent safety record — scored 10/100 (lower is better). This carrier has one of the best inspection records on file.
Last inspected 03/18/2026
Safety Score Breakdown · 10/100 points
Lower scores are better. How is this calculated?
According to FMCSA records, Western Water Works Supply Company (DOT# 138898) in Chino Hills, California has 40 inspections on record with 32 violations and a 22.5% vehicle out-of-service rate. Safety grade: A (excellent safety record).
Out-of-Service Rates vs. National Average
An out-of-service (OOS) violation means a vehicle or driver was found unsafe to operate during a roadside inspection and was prohibited from continuing until the issue was corrected.
Violation Categories · 32 total violations
FMCSA groups violations into Behavioral Analysis and Safety Improvement Categories (BASICs). Each violation found during a roadside inspection is classified into a category that reflects the type of safety risk.
Inspection History · 40 records
FMCSA inspections range from Level 1 (full vehicle and driver examination) to Level 6 (enhanced motorcoach inspection). Level 1 is the most thorough; Levels 2 and 3 are walk-around and driver-only checks.
| Date | State | Veh OOS | Drv OOS |
|---|---|---|---|
| 03/18/2026 | CA | 1 | 0 |
| 03/18/2026 | CA | 0 | 0 |
| 02/12/2026 | CA | 0 | 0 |
| 01/15/2026 | CA | 1 | 0 |
| 10/01/2025 | CA | 1 | 0 |
| 09/22/2025 | CA | 0 | 0 |
| 08/21/2025 | CA | 0 | 0 |
| 08/12/2025 | CA | 1 | 0 |
| 06/06/2025 | CA | 0 | 0 |
| 05/28/2025 | CA | 0 | 0 |
Fleet Profile
Power units include trucks, tractors, and other commercial motor vehicles registered to the carrier. Driver count reflects the total number of drivers reported on the carrier's MCS-150 filing.