The purpose of this guide is to provide guidance in performing audits of the Clean Water and Drinking Water SRFs administered by states. This guide is for the use of EPA OIG auditors, state auditors and Independent Certified Public Accountants when performing SRF financial audits.The guide is not intended to be a complete manual of procedures, nor is it an audit program. It is limited to matters that warrant special attention and/or that experience has indicated may be useful. This guide is also based on the assumption that its users are knowledgeable in accounting and auditing. As such, it focuses on specific areas of auditing, accounting and reporting relevant to the SRFs. It does not discuss the application of all accounting pronouncements or auditing standards that may pertain to SRF audits. The guide incorporates relevant auditing standards, including General Accounting Office (GAO) guidance where applicable, and outlines key issues to be considered in SRF programs. However, it is not a substitute for the existing regulations nor does it eliminate the need to review current GAO guidance, EPA regulations, state laws, and/or pronouncements issued by the Financial Accounting Standards Board (known as FASB) and the Governmental Accounting Standards Board (known asGASB). Auditors are expected to exercise professional judgment in performing SRF financial audits.The guide was prepared on the assumption that the auditor will have to perform an audit to accomplish the objectives presented below. However, the auditor may often determine that work performed by others (EPA annual reviews, other audits, and OMB Circular A-133 audits) may be useful in meeting the objectives. Audit procedures should assure that auditors build on the work of others so that there is not a duplication of audit effort. Accordingly, while relying on the work of others, the auditor should exercisejudgment whether to perform additional work in each objective. In such cases, consultation with the OIGNational SRF Audit Manager is encouraged.