Ammonium Nitrate Detonation — Community Disaster
West Fertilizer Company Explosion and Fire
West Fertilizer Company
📍 West, TX
Incident: April 17, 2013 • CSB Report: January 28, 2016
15
Fatalities
260+
Injuries Treated
Fertilizer Grade Ammonium Nitrate (FGAN)
Chemical / Hazard
19
CSB Recommendations
📋 Incident Summary

On April 17, 2013, a fire at the West Fertilizer Company storage and distribution facility in West, Texas, led to the detonation of a stockpile of fertilizer grade ammonium nitrate (FGAN). Twelve emergency responders and three members of the public were killed, and local hospitals treated more than 260 injuries. The blast devastated nearby homes, schools, and care facilities.

The CSB found a lack of protection for communities at risk from ammonium nitrate storage and a lack of regulation at all levels of government. Its recommendations address hazard awareness, firefighter training, land use planning, building and fire codes, and regulatory oversight.

The CSB approved its final report on January 28, 2016, with 19 recommendations.

🔎 Key Findings
Finding 01
FGAN Detonated During a Fire
A fire at the facility led to the detonation of the FGAN stockpile.
Finding 02
Responders Not Aware of the Hazard
Twelve emergency responders were killed; the CSB recommended training on FGAN fire and explosion hazards and pre-incident planning.
Finding 03
Combustible Construction
The CSB recommended prohibiting combustible construction and requiring sprinklers, detection, and ventilation for FGAN storage.
Finding 04
Community Too Close
Homes, schools, and care facilities near the plant were devastated; the CSB called for land use planning and separation distances.
Finding 05
Regulatory Gaps
FGAN was not covered by OSHA PSM or EPA RMP, and the CSB recommended adding it or strengthening OSHA's ammonium nitrate storage requirements.
🔍 Root Causes
1
Fire in combustible storage
FGAN was stored in combustible bins and buildings without sprinklers.
2
Responders unaware of detonation risk
Firefighting continued close to the FGAN stockpile.
3
Lack of regulation and land use planning
No agency required adequate safeguards or separation from the community.
☑ CSB Recommendations
→ U.S. EPA (3)
Issue EPCRA guidance, clarify that fertilizer facilities are covered by EPCRA, and add FGAN to the RMP rule.
→ OSHA (2)
Create a Regional Emphasis Program for ammonium nitrate storage, and add FGAN to PSM or strengthen 1910.109(i).
→ FEMA (4)
Fund and oversee FGAN firefighting training and outreach to fire departments.
→ International Code Council (1)
Add ammonium nitrate storage requirements to the International Fire Code.
→ Texas agencies and organizations (8)
Texas Commission on Fire Protection, SFFMA, TEEX, Texas Department of Insurance, and the West Volunteer Fire Department: FGAN training and certification, outreach, insurance underwriting guidance, and pre-incident planning.
→ El Dorado Chemical Company (1)
Promote product stewardship and safe storage practices among FGAN customers.

Full recommendation text and current status: CSB investigation page.

💡 Lessons Learned
Ammonium nitrate can detonate in a fire; responders must know when to withdraw.
Store FGAN in noncombustible buildings and bins with fire protection.
Land use planning must keep homes and schools away from explosive hazards.
Facilities must share hazard information with local responders and planners.
EAP: Emergency PlanningPSI: Process Safety InformationPHA: Process Hazard AnalysisTRN: Training
🔨 Safety Meeting Toolbox Talk
Topic: Ammonium Nitrate Storage Hazards & Emergency Preparedness
►Do we store ammonium nitrate or other materials that can detonate?
►Do local responders know what we store and when to stay back?
►What is near our facility?
►Is our storage construction combustible?
Immediate Action Items
✓Share Tier II and hazard information with the fire department.
✓Develop pre-incident plans with responders.
✓Evaluate storage construction and separation distances.
🔗 PSM Failures Behind This Incident

This incident involved breakdowns across 4 PSM-related areas (EAP · PSI · PHA · TRN). Each represents a gap that process safety programs are designed to close.

Emergency Planning & Response
When process safety barriers fail, emergency response capability determines whether the outcome is controlled or catastrophic. Gaps in emergency preparedness amplified the consequences here.
Supporting documents in our library →
Process Safety Information (PSI)
Accurate, complete Process Safety Information is the foundation every other PSM element depends on. When PSI is missing or wrong — chemistry data, equipment specs, P&IDs — the entire hazard analysis is built on a flawed base.
Supporting documents in our library →
Process Hazard Analysis (PHA)
A structured PHA or HAZOP study exists to identify exactly these scenarios before they occur. When PHA is absent, superficial, or overdue for revalidation, hazards operate unseen until they kill someone.
Supporting documents in our library →
Training & Operator Competency
Workers must understand process hazards — not just the steps on the page. Training records, refresher frequency, and verified competency are all OSHA PSM requirements.
Supporting documents in our library →
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