Water System Records Retention
At times, owning, operating, and maintaining a public water system can seem a daunting challenge. The paperwork requirements alone can feel overwhelming. Keeping complete, well organized records can greatly simplify the task of running a water public system. Records prove compliance, track system trends, and assist in the overall planning, operation, maintenance, and management of the water system. You cannot effectively run a water system and keep it in compliance without keeping and maintaining good records.
This document is designed to assist you in managing your systems records. Records should be kept in a safe secure place and readily available for use by the system operator or to be provided to a state or federal inspector upon request. If the ownership, management, or the operator of your system changes, all records are required to be transferred to the new responsible party.
The following is a summary of records that water systems should have and how long the records should be maintained. Most of the documents cited are required by state or federal statute. The rest are strongly recommended for efficient water system management and operation.
| Documents Perpetually Kept, Maintained, & Updated |
| Sampling Schedules |
Review & update as necessary (quarterly) |
| Monitoring Waivers |
Approval letter & copy of application |
| Emergency Plan |
Update as necessary; review annually |
| Operations & Maintenance Manual |
Update as necessary |
| Distribution System Maps (As-Builts) |
Update as necessary |
| Inspection Logs |
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| Backwash Recycling Records |
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| Records Kept for 3 Years |
| Public Notice Documents |
Copy of notice & certification |
| Consumer Confidence Reports |
Copy of CCR and certification |
| Water Use Data |
Direct measurements & calculations |
| Water Conservation Program |
Meter readings, rate structure, outreach |
| Filter Monitoring |
Surface water systems |
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| Records Kept for 5 Years |
| Bacteria Analysis |
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| Cross Connection Control Records |
Inspection, test, repair |
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| Records Kept for 10 Years |
| Chemical Monitoring Analysis |
VOC, SOC, Nitrate, Nitrite, IOC, radiological |
| Disinfection Residuals |
If system disinfects |
| Water Quality Testing |
Chlorine residuals, temperature, pH, etc. |
| State Sanitary Surveys |
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| Records Kept for 12 Years |
| Lead & Copper |
Sample analysis, corrosion measurements |
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| Permanent Records |
| Cross Connection Control Program |
Last legally adopted |
| Well Siting Approval Letter |
For wells approved after 1993 |
| Pump Test results |
Include all pump information/specifications |
| Source Water Protection Plans |
Update periodically |
| Wellhead Protection Plans |
Update periodically |
| Disinfection Profiling/Benchmarks |
Surface water systems |
| Drinking Water Source Assessment Report |
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| Large Groundwater Withdrawal Permit |
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| Waste Disposal Documentation |
Include any discharge permits |
For additional information, please contact the Drinking Water and Groundwater Bureau at (603) 271-2513 or dwgbinfo@des.state.nh.us. Drinking water fact sheets are available through DES web site at www.des.nh.gov/dwg.htm.
Note: Due to the length and complexity of drinking water rules, this list is not complete. Many of the listed documents are not applicable to very small water systems. If you have any questions or if a record you keep is not listed, please contact DES for clarification.
Note: This fact sheet is accurate as of January 2007. Statutory or regulatory changes, or the availability of additional information after this date may render this information inaccurate or incomplete.
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