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Utilities (Wastewater and Water)

Reference Number: MTAS-704
Reviewed Date: 06/03/2025

UTILITIES (Wastewater and Water) RECORDS RETENTION SCHEDULE 

 

Description of RecordRetention PeriodLegal Authority/Rationale

 

WASTEWATER RECORDS

 

U-1. Discharge Monitoring Reports (DMRs).Retain 3 years or longer if so requested by Water Pollution Control as a minimum to comply with permit. Retention for life of the facility is recommended.

NPDES Permit Requirements Part I Subpart B.5.

Provides record of operations and loading to assist in planning.

U-2. Industrial Pretreatment. All information resulting from monitoring activities.*Retain 3 years, longer in cases of unresolved litigation.40 C.F.R. 403.12 (o) (1-3).
U-3. Laboratory Bench Sheets, Calibration and Maintenance of Instruments. QA/QC Data, Flow Charts.Retain 3 years or longer if requested by Water Pollution Control.NPDES Permit Requirements Part I Subpart B.5.
U-4. Land Application of Cumulative Pollutant Loading Rate Sludge under 40 C.F.R. 503.13.(a) (2) (I).Permanent record.40 C.F.R. 503.17 (a) (5) (ii).
U-5. Monthly Operating Reports (MORs).Retain 3 years or longer if requested by Water Pollution Control as a minimum to comply with permit. Retention for the life of the facility is recommended.

NPDES Permit Requirements Part I Subpart B.5.

Provides record of operations and loading to assist in planning.

U-6. Wastewater Sludge Disposal via Land Application, Surface Disposal, Incineration.*Retain 5 years.(40 C.F.R. 503.17) Land Application; (503.27) Surface Disposal; (503.47) Incineration.

UTILITIES (Water and Wastewater Records)

Description of Record

Retention Period

Legal Authority/Rationale

 

DRINKING WATER RECORDS

 

U-7. Bacteriological Analysis.*Retain 5 years.Tenn. Comp. R. & Regs. 0400-45-01-.20 (a)
U-8. Chemical Analysis.*Retain 10 years.Tenn. Comp. R. & Regs. 0400-45-01-.20 (a)
U-9. Consumer Confidence Reports.*Retain 3 years.

Tenn. Comp. R. & Regs. 0400-45-01.35 (5) (h)

 

U-10. Cross Connection Records.*Retain 5 years.Tenn. Comp. R. & Regs. 0400-45-01-.20 (a)
U-11. Monthly Operating Reports (MORs).Retain until next survey at a minimum. Retention for life of the facility is recommended.Provides record of operations and loading to assist in planning.
U-12. Storage Tank Inspections.Retain 5 years to comply with rule. Retention for life of the tank is recommended.Tenn. Comp. R. & Regs. 0400-45-01-.20 (h). Retention for life of the tank is recommended to track deprecation and repairs.
U-13. Turbidity. Records include daily worksheets, calibration data, and strip charts.Retain for 5 years. *Retain until the next sanitary survey.Tenn. Comp. R. & Regs. 0400-45-01-.20 (f).
U-14. Variance or Exceptions Granted.*Retain 5 years following the expiration of such variance or exemption.Tenn. Comp. R. & Regs. 0400-45-01-.20 (d).
U-15. Violation, Corrective Action. Records of actions taken to correct violations of primary drinking water regulations.*Retain 3 years after action.Tenn. Comp. R. & Regs. 0400-45-01-.20(b).
U-16. Written Reports, etc., Related to Sanitary Survey.*Retain 10 years after sanitary survey.Tenn. Comp. R. & Regs. 0400-45-01-.20 (c).

*Indicates a mandatory retention period based on state or federal law.