Sanitary survey: the 8 elements and how to prepare.
A sanitary survey is an on-site review of a public water system by the state primacy agency to evaluate whether it can reliably deliver safe drinking water. Surveyors examine eight areas — from source and treatment to operator compliance — and issue findings the system must correct. Community water systems are generally surveyed at least every three years.
The eight elements of a sanitary survey
Source
Wells, intakes, and source protection — construction, security, and vulnerability to contamination.
Treatment
Treatment processes and equipment — whether they're adequate, operating correctly, and properly maintained.
Distribution system
Mains, pressure, cross-connection control, and how the system maintains water quality out to the tap.
Finished water storage
Tanks and reservoirs — integrity, screening, hatches, and protection of stored treated water.
Pumps, pump facilities & controls
Pumping capacity, backup power, and controls that keep the system pressurized and reliable.
Monitoring, reporting & data verification
Whether required sampling is done on schedule and results are reported accurately and on time.
System management & operation
Operations, maintenance practices, recordkeeping, and the system's capacity to run day to day.
Operator compliance
Whether the system is run by operators certified at the right level for its class.
Most survey findings are paperwork, not pipes.
A large share of deficiencies are about records, monitoring gaps, and missing documentation — exactly the things that pile up when compliance lives in binders and spreadsheets.
1water is building a sanitary-survey self-assessment and keeps your monitoring, reporting, and records organized year-round — so survey day is a review, not a scramble. Tell us your state →
Sanitary survey — common questions
- U.S. EPA — Sanitary survey guidance and the eight standard elements.
- State primacy agency drinking water programs (survey frequency and procedures).
Keep reading
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Coliform bacteria in water: what a positive result means
Total coliform vs fecal coliform vs E. coli, what a positive test means, and how to fix coliform in well water.
Compliance shouldn't wait for a crisis.
1water helps small and mid-size water systems stay ahead of sanitary surveys, sampling, lead, PFAS, and CCR requirements — self-serve, and priced for the small end.