Florida Drinking Water Plant Operations & Monthly Operation Reports

Florida drinking water operators are responsible for more than running pumps, filters, chemical feed systems, and disinfection equipment. They also must create operating records that show how the plant actually performed.

Monthly Operation Reports, commonly called MORs, convert daily operating data into a formal regulatory record. A good MOR should agree with the plant's daily logs, production meters, chemical records, laboratory results, and operator observations.

Monthly Operation Reports Are Part of Plant Operations

In Florida, MORs are not separate from plant operations. They document the operation of the public water system and provide a recurring compliance record.

Operators should treat MOR completion as part of the operating process rather than as clerical work performed long after the month ends.

Rule 62-555.350 Governs Public Water System Operation and Maintenance

Florida Rule 62-555.350 addresses operation and maintenance of public water systems.

The current adopted version became effective February 26, 2025.

Operators should use the current rule and current FDEP reporting forms because operational and reporting requirements can be amended over time.

Florida Uses Different MOR Forms for Different System Types

Florida does not use one universal Monthly Operation Report for every public water system.

FDEP currently publishes different MOR formats for systems such as:

• public water systems treating raw groundwater or purchased finished water;
• consecutive systems that do not treat water;
• public water systems fluoridating water;
• consecutive systems receiving purchased finished water from a Subpart H system;
• community water systems with multiple treatment plants;
• certain systems receiving advanced treated water.

The operator should use the form that matches the actual system configuration.

Why the Correct MOR Form Matters

Different systems have different operating responsibilities.

A groundwater plant producing and disinfecting its own water has different records from a consecutive system that only receives finished water from another supplier.

A fluoridating system has additional fluoride-related operating information. A multi-plant community water system may need a separate summation of finished-water production.

Daily Records Feed the MOR

The MOR should be based on actual daily operating records.

Daily records can include:

• water production;
• pump or well operation;
• chemical feed;
• disinfectant residual;
• treatment process values;
• storage or distribution observations;
• equipment status;
• abnormal conditions;
• operator attendance or plant visits where required.

Production Data Must Be Internally Consistent

Water production reported on the MOR should agree with source meters, finished-water meters, plant logs, and other applicable production records.

Large unexplained differences can indicate:

• meter problems;
• data-entry errors;
• incorrect unit conversions;
• unrecorded bypass or transfer flow;
• poor recordkeeping.

Know the Reporting Units

Operators should confirm the units required by the MOR before entering data.

Common errors include entering gallons where the form expects million gallons, confusing daily flow with monthly totals, or reporting a rate where the form asks for a volume.

Always read the field heading and form instructions before entering a calculated value.

Disinfectant Data

Where applicable, MORs document disinfectant-related operating information.

Operators should ensure that disinfectant data are consistent with:

• daily residual measurements;
• chemical-feed records;
• plant operating conditions;
• distribution-system records where applicable.

An unexplained residual value on the MOR should be investigated rather than copied forward from another record.

Chemical Feed Records

Chemical feed information should be supported by plant records such as:

• feed-pump settings;
• solution strength;
• chemical inventory changes;
• day-tank measurements;
• calibration checks;
• dose calculations.

Good records allow an operator to explain why chemical use changed when flow or raw-water quality changed.

Fluoridation Records

Florida publishes a separate Monthly Operation Report for public water systems fluoridating water.

Fluoride-related operating records should be consistent with:

• fluoride feed;
• finished-water fluoride measurements;
• plant production;
• chemical inventory;
• equipment operation.

The operator should not estimate fluoride values merely to fill a reporting field.

Groundwater Systems

Florida publishes a specific MOR for public water systems treating raw groundwater or purchased finished water.

For a groundwater treatment system, daily operational records should reflect the actual treatment provided, such as:

• source operation;
• disinfection;
• aeration where used;
• iron or manganese treatment;
• softening where applicable;
• corrosion control;
• other permitted treatment processes.

Consecutive Systems

A consecutive system can receive finished water from another public water system instead of treating a raw source.

Florida has separate MOR forms for consecutive systems because their operational responsibilities differ from those of source-water treatment plants.

Operators should still monitor the conditions for which the receiving system is responsible, including distribution-system operation and water quality.

Multiple Treatment Plants

Community water systems with multiple treatment plants can be required to summarize finished-water production using the applicable Florida reporting form.

The total should reconcile with the underlying individual plant production records.

A summation report should not be treated as an independent estimate.

Advanced Treated Water

The current Rule 62-555.350 includes supplemental monthly reporting requirements for public water systems receiving advanced treated water where applicable.

Operators working at such systems should use the current supplemental form and should not rely on older MOR formats that do not capture the required information.

Operator Information and Certification

Monthly reports can require identification of the certified operator or responsible operating personnel.

Operators should ensure that names, license information, dates, and signatures or certifications are complete and accurate.

A technically correct report can still be deficient if required operator identification or certification is missing.

Do Not Reconstruct the Month From Memory

Waiting until the end of the month to reconstruct plant operation from memory is poor practice.

Daily entries should be made while the operating information is current.

Consistent daily records make monthly reporting faster and reduce the risk of:

• missing data;
• incorrect averages;
• wrong totals;
• unexplained process changes;
• inconsistent values between reports.

Review Before Submission

Before submitting a MOR, review:

• system identification;
• reporting month;
• plant or facility identification;
• daily production entries;
• monthly totals and averages;
• chemical and disinfectant data;
• required operator information;
• signatures or certifications;
• attachments;
• unusual operating conditions.

Check Arithmetic

Simple arithmetic errors can create inconsistencies in an otherwise accurate operating report.

Operators should verify:

• daily totals;
• monthly totals;
• averages;
• maximum and minimum values where requested;
• unit conversions.

Do Not Hide Abnormal Conditions

If the plant experienced an unusual condition, operators should document it appropriately rather than alter data to make the month appear normal.

Examples include:

• equipment failure;
• loss of chemical feed;
• low disinfectant residual;
• source outage;
• meter failure;
• power failure;
• abnormal demand;
• water quality complaint;
• emergency repair.

Corrections Should Be Traceable

If an operating record or report must be corrected, the correction should remain traceable according to the utility's recordkeeping procedures.

Operators should not erase, conceal, or silently replace information in a way that makes the original operating record impossible to reconstruct.

MORs and Compliance Monitoring Are Related but Different

An MOR documents plant operations. Compliance laboratory monitoring documents regulated drinking water quality.

The two systems support each other, but one does not automatically replace the other.

For example, a daily chlorine residual recorded on an MOR does not replace a separate certified-laboratory analysis required by another rule.

MORs and Maintenance Records Should Agree

If a critical pump, chlorinator, analyzer, or other component was out of service, the maintenance log and MOR should tell a consistent operational story.

Operators should be able to explain:

• what failed;
• when it failed;
• how the plant continued operating;
• what backup equipment was used;
• when the equipment returned to service.

Operational Trends Are Useful Beyond Compliance

MOR data can help operators identify trends in:

• water production;
• chemical consumption;
• disinfectant residual;
• treatment demand;
• seasonal variation;
• equipment performance.

A monthly report is more useful when operators use the data to improve plant performance rather than simply file the completed form.

Records Support Sanitary Surveys

During regulatory inspections or sanitary surveys, operating records help demonstrate how the plant has been operated and maintained.

Incomplete records can make it difficult to show that required practices were consistently followed.

Common MOR Mistakes

• Using the wrong Florida MOR form for the system type.
• Waiting until month-end to reconstruct daily operating data.
• Mixing gallons and million gallons.
• Reporting a flow rate where a total volume is requested.
• Entering chemical-feed values that do not match inventory or calibration records.
• Failing to reconcile multi-plant production totals.
• Leaving required operator information incomplete.
• Copying values from the previous month instead of using actual data.
• Ignoring arithmetic errors in totals or averages.
• Treating the MOR as a substitute for separate compliance monitoring.

A Practical MOR Workflow

1. Use the correct Florida MOR form for the system configuration.
2. Record operating data every day as required.
3. Keep meter, chemical, disinfectant, and process records internally consistent.
4. Check units before calculating totals and averages.
5. Document abnormal conditions and corrective actions.
6. Reconcile production data with underlying meters and logs.
7. Complete required operator identification and certification fields.
8. Review arithmetic and missing fields before submission.
9. Retain the report with supporting operating records.
10. Use MOR trends to improve process control and maintenance planning.

What to Remember for the Exam

• Florida uses different Monthly Operation Report forms for different public water system configurations.
• Rule 62-555.350 governs operation and maintenance of public water systems and was most recently amended effective February 26, 2025.
• MORs should be based on actual daily operating records.
• Production totals should reconcile with source, plant, and finished-water meter records.
• Operators must pay close attention to reporting units, totals, averages, and required certifications.
• Florida has separate MOR formats for groundwater/purchased-water systems, consecutive systems, fluoridating systems, multi-plant systems, and certain advanced-treated-water systems.
• Chemical-feed and disinfectant data should agree with supporting plant records.
• MORs document operations but do not replace separate required compliance monitoring.
• Abnormal conditions should be documented, not hidden.
• Corrections should remain traceable.
• Operating records support regulatory review and sanitary surveys.
• MOR data can also be used for process-control and operational trend analysis.