Commercial Building Water Use: What Owners Should Track

A commercial building’s water bill is easier to manage when the owner can see the usage behind it. Start with the meters, the billing periods, and a simple record of what changed at the property. A higher charge may reflect more water, a rate change, an estimated reading, or a different service period. The bill total alone cannot tell you which one occurred.

A usable monthly review starts with the property’s own records. The U.S. Environmental Protection Agency recommends metering, leak detection, and benchmarking as parts of a commercial facility water program. An owner can use that guidance to ask for better records before approving a repair or equipment change.

List every account and the area it serves

Ask the property team for the utility account number, meter identifier, service address, billing dates, and the part of the building or site served by each meter. Include separate irrigation, cooling, or tenant meters when they exist. Mark any area where the team cannot yet explain the meter relationship. That gap matters when a bill changes.

Keep copies of the utility bills and readings in one place. If a tenant controls a separate account, distinguish that usage from water paid by the property. Do not assume a submeter is accurate or that a lease assigns its cost in a particular way. Check the equipment record and the governing documents before using the numbers for a charge or owner decision.

Compare usage over matching periods

Put gallons or hundred cubic feet beside the previous period and the same season last year. Note the number of billing days and whether the utility used an actual or estimated reading. Normalize for billing days before comparing a 34-day bill with a 27-day bill. Review the rate and fixed charges separately from usage.

A monthly table can be short: meter, service period, billed use, reading type, cost, known operating change, and follow-up owner. Keep the underlying bills available. If a number is corrected later, retain the original and the revised bill so the change can be traced.

Record what changed at the property

Usage can move with occupancy, a new tenant operation, irrigation schedules, cooling equipment, cleaning work, or a repair. Ask the manager to record those events against the relevant meter and period. The explanation should name the change and its timing. “Seasonal increase” is too broad if the same meter also had an irrigation controller replaced.

For a mixed-use site, review each account before rolling the numbers up. The owner needs to know which building or system moved. EPA’s WaterSense guidance treats metering and submetering as ways to locate water use within a facility. The right level of detail depends on the equipment and records actually available at your property.

Investigate a change before prescribing a fix

When usage rises without an obvious operating explanation, ask for a reading check and a field review. The manager can compare current meter data, walk the areas served, and coordinate a qualified provider to assess a suspected leak or equipment fault. A qualified provider must diagnose the cause.

The review should end with a specific status: what was checked, what the provider found, whether work was approved, and when a follow-up reading will confirm the result. Keep that record beside the bill. Otherwise the same unexplained increase may return as a fresh question next month.

Show the decision due

A useful report flags the meters that need attention, the reason, the person assigned, and the decision due. Some items need no owner action. Others need an approval for a diagnostic visit, repair scope, or measurement upgrade. Keep the recommendation and the supporting bill or field record together. That is the point where tracking becomes management.

If you cannot trace a water change from the bill to a meter, field check, and next decision, Request a Property Management Performance Review. The first conversation can start with the last few bills and what your current report leaves unanswered.

Sources and related reading

• U.S. EPA WaterSense, Best Management Practices

• U.S. EPA WaterSense, Commercial Buildings