Sanitary Surveys and Regulatory Inspections: Preparation and Response

What Is a Sanitary Survey?

A sanitary survey is a comprehensive on-site inspection of a public water system conducted by the state primacy agency (or EPA in states without primacy) to evaluate the adequacy of the system for producing and distributing safe drinking water. Under the Safe Drinking Water Act, states are required to conduct sanitary surveys on a periodic schedule — typically every three to five years, depending on system size and type. The survey is not a surprise audit of your character; it is a structured, systematic review of how your system operates. Operators who understand what inspectors look for, and who keep organized records, consistently perform better and protect their communities.

The Eight Survey Elements

EPA has established eight elements that every sanitary survey must address. Knowing these elements helps you organize your records and anticipate inspector questions.

1. Source — The origin of raw water (surface water intake, groundwater well, purchased supply). Inspectors examine source protection plans, wellhead protection areas, and any potential contamination threats nearby.

2. Treatment — All processes used to make water safe: coagulation, filtration, disinfection, softening, or others. Records of chemical feed rates, contact time calculations, and process adjustments are reviewed.

3. Distribution System — Pipes, valves, hydrants, and service connections that deliver water to customers. Inspectors look at flushing records, cross-connection control programs, pressure surveys, and main break logs.

4. Finished Water Storage — Tanks and reservoirs that hold treated water. Inspection records, cleaning logs, and security documentation (locked access hatches, screened vents) are required.

5. Pumps, Pump Facilities, and Controls — Pump stations, motors, controls, and SCADA or telemetry equipment. Maintenance logs, electrical safety checks, and alarm test records document this element.

6. Monitoring, Reporting, and Data Verification — Laboratory results, sampling schedules, chain-of-custody forms, Consumer Confidence Reports (CCRs), and any violation notices. Completeness and accuracy of monitoring records are scrutinized closely.

7. System Management and Operation — Organizational charts, emergency response plans, standard operating procedures (SOPs), financial records showing the system can sustain operations, and mutual aid agreements.

8. Operator Compliance — Proof that all operators working on the system hold current, appropriate-level licenses for their state. Expired licenses, or operators working above their license class, are serious deficiencies.

Organizing Your Documentation Packet

Before the survey date, gather one representative document for each element and organize them in clearly labeled folders or binders. A well-organized packet signals professionalism and speeds the inspection. Use a table of contents. Place the most recent items on top. Remove outdated or superseded versions — having two conflicting SOPs in the same folder confuses the record and raises questions.

Common documents by element:

• Source: Wellhead protection plan, source water assessment, well construction logs
• Treatment: Daily O&M logs, chemical feed records, disinfection residual logs, equipment calibration records
• Distribution: Flushing schedule and completion logs, cross-connection inspection reports, pressure zone maps
• Storage: Tank inspection reports, cleaning certificates, security check logs
• Pumps/Controls: Preventive maintenance schedules and completion records, alarm test logs
• Monitoring/Reporting: Lab results binder, CCR, any Tier notices sent to customers
• Management/Operations: Emergency response plan summary, SOPs index, mutual aid agreements
• Operator Compliance: Copies of all current operator licenses with expiration dates

Responding Professionally to Inspector Questions

Inspectors are colleagues in public health, not adversaries. Answer questions accurately, concisely, and honestly. Never guess at a number — if you do not know, say so, then show the inspector where you would find the answer. Three habits separate confident operators from nervous ones:

• Know your system. Before any survey, walk the entire system. Know where every valve, pump, and sample tap is located.
• Let the records speak. Point to documented evidence rather than relying on memory alone. "According to our log from last Tuesday..." is stronger than "I think we checked that."
• Report deficiencies honestly. If you found a problem and corrected it, say so and show the corrective action record. Regulators respect operators who identify and fix issues proactively.

Safety Considerations During a Sanitary Survey

Inspectors may accompany you into pump stations, storage tank areas, and confined-space entry points. Follow your facility's lockout/tagout (LOTO) procedures before showing electrical panels or demonstrating equipment. Confined spaces such as below-grade valve vaults require a permit system and atmospheric testing — never enter or invite an inspector to enter a permit-required confined space without completing all safety steps. Wear the correct PPE (hard hat, safety glasses, chemical-resistant gloves near feed systems) and ensure your visitor does the same. A sanitary survey is no exception to your facility's safety rules.

Significance for Licensing

State Class I and Class II operator license exams test knowledge of regulatory requirements, record-keeping obligations, and system management — all topics directly reflected in the eight survey elements. Operators who have prepared for a sanitary survey are, in effect, prepared for a large portion of their licensing exam. Maintaining complete, accurate records is not just good practice; it is a legal obligation under the Safe Drinking Water Act and your state's drinking water regulations.