ISO 14001 specifies the following documents as required:
- Scope of the EMS—Clause 4.3 (usually documented as EMS Scope document)
- Environmental policy—Clause 5.2 (usually documented as Environmental Policy)
- Risk and Opportunities to be Addressed and Processes Needed-Clause 6.1.1 (usually documented as Risk Assessment)
- Environmental Aspects with Associated Environmental Impacts-Clause 6.1.2 (usually documented as Process Aspects Chart)
- Criteria for Evaluation of Significant Environmental Aspects-Clause 6.1.2 (usually documented as Process Aspects Chart)
- Significant Environmental Aspects-Clause 6.1.2 (usually documented as Process Aspects Chart)
- Compliance Obligations Document-Clause 6.1.3 (usually documented as List of Legal and Other Requirements)
- Environmental Objectives and Plans for Achieving Them-Clause 6.2 (usually documented as List of Environmental Objectives)
- Operational Control-Clause 8.1 (usually documented with procedures or guidelines regarding operational control)
- Emergency Preparedness and Response- Clause 8.2 (usually documented with procedures or guidelines regarding prevention, response, and learning regarding emergency situations)
- Note: These ISO 14001 documents are mandatory only if the organization decides that they are necessary to the extent necessary to have confidence that the processes is (are) carried out as planned.

Note: ISO 14001 also specifies the following records as mandatory:
- Training, skills, experience, and qualifications—Clause 7.2 (usually documented as Training certificates and CVs)
- Evidence of Communication—Clause 7.4 (usually documented as Communication Report)
- Monitoring and Measurement Results-Clause 9.1.1 (usually documented as Matrix of Environmental Performance and Data Analysis Report)
- Evidence of the Compliance Evaluation Results-Clause 9.1.2 (usually documented as Compliance Evaluation Record)
- Internal audit program—Clause 9.2 (usually documented as Internal Audit Program)
- Results of internal audits—Clause 9.2 (usually documented as Internal Audit Report)
- Results of the management review—Clause 9.3 (usually documented as Management Review Minutes)
- Results of corrective actions—Clause 10.2 (usually documented as Corrective Action Form)

Note: You will know if a document is mandatory by reading ISO 14001. It states pretty clearly what needs to be documented using a phrase like “The organization shall maintain documented information” or recorded using a phrase like “The organization shall retain documented information of …” for example, the evidence of the compliance evaluation results.