Nashville Food Service Water Testing Compliance Checklist

Nashville Water Testing Requirements & Local Standards

The Metro Public Health Department of Nashville-Davidson requires all food service facilities to use only potable (safe drinking) water from approved municipal sources or properly treated private wells. Facilities must maintain temperature-controlled hot and cold water lines with adequate pressure (at least 20 psi) and backflow prevention devices on all cross-connections. Chemical testing for chlorine residuals (0.5–1.0 mg/L for chlorinated supplies) must occur monthly, while microbiological testing for total coliforms and E. coli must be performed annually at minimum—more frequently if violations are detected. Private well water requires third-party lab analysis and state approval before use in food preparation.

Critical Inspection Items & Documentation Checklist

During health inspections, officials verify that your facility maintains records of all water testing results for the past 12 months, including lab reports showing coliform absence and chlorine levels. Inspectors examine backflow prevention devices (RPZ valves or air gaps) at hand-washing stations, food prep sinks, and dish machines to prevent contamination from cross-connections. They also verify that hot water reaches 120°F minimum at fixtures and cold water stays below 41°F, and that water lines are color-coded (blue for potable, green for non-potable). Equipment certifications for water treatment systems (if used) and proof of annual inspection by a licensed professional are required documents.

Common Water Testing Violations & Correction Timelines

Frequent violations include absence of documented water testing records, coliform contamination detected in annual tests, and inoperative or missing backflow prevention devices—each requiring immediate corrective action. The Metro Public Health Department typically allows 24–48 hours to correct critical violations (positive coliform results) before potential closure. Non-critical violations like missing documentation or failed chlorine residual checks usually require correction within 3–10 business days. Violations involving private well supplies must be remedied before the well can be used again, and repeat violations trigger increased inspection frequency (monthly instead of annual) and potential fines up to $100+ per violation.

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