Serious incidents run well below the district average, and reporting is largely complete, with one or more categories missing.
| CATEGORY | COUNT | TIER |
|---|---|---|
| Firearm or explosive possession | 0 | Serious |
| Homicide | 0 | Serious |
| Physical attack with weapon | 0 | Serious |
| Rape / sexual assault | 0 | Serious |
| Referral to law enforcement | 1 | Serious |
| Robbery with weapon | 0 | Serious |
| School-related arrest | 0 | Serious |
| Threat of attack with weapon | 0 | Serious |
| Physical attack without weapon | 27 | Moderate |
| Robbery without weapon | 0 | Moderate |
| Threat of attack without weapon | 0 | Moderate |
Diamond Bar High ranks #3 of 8 scoreable schools in this district.
| SCHOOL | GRADES | SCORE | GRADE |
|---|---|---|---|
| Vejar Elementary | KG–05 | 99 | B |
| Collegewood Elementary | KG–05 | 99 | B |
| Walnut High | 09–12 | 75 | B |
| Chaparral Middle | 06–08 | 68 | B |
| South Pointe Middle | 06–08 | 62 | B |
| Suzanne Middle | 06–08 | 51 | B |
| Cyrus J. Morris Elementary | KG–05 | 49 | B |
| Castle Rock Elementary | KG–05 | — | C |