1. 1926.501 – Fall Protection(Construction standard) – 8,241 violations
2. 1910.1200 – Hazard Communication– 6,156 violations
3. 1926.451 – Scaffolding (Construction standard) – 5,423 violations
4. 1910.134 – Respiratory Protection– 3,879 violations
5. 1910.305 – Electrical, Wiring Methods– 3,452 violations
6. 1910.178 – Powered Industrial Trucks (PIT)– 3,340 violations
7. 1910.147 – Lockout/Tagout– 3,254 violations
8. 1926.1053 – Ladders(Construction standard) – 3,311 violations
9. 1910.212 – Machine Guarding- 2,701 violations
10. 1910.303 – Electrical, General Requirements- 2,745 violations

Source: http://www.ehso.com/css/oshaviolations.php