Winter Garden’s residential rate sheet and utility FAQ support a clean calculation through 10,000 gallons. Above that point, the water table continues, but the sewer column leaves the higher-volume rows blank. A reliable calculation should stop instead of filling the gap by assumption.
Inputs that are visible
The City FAQ and residential rate sheet list these inputs; the rate sheet identifies the base charges with a 5/8-inch × 3/4-inch meter:
- $9.59 monthly water service charge;
- $1.6031 per thousand gallons for water through 10,000;
- higher water tiers beginning at 10,001 gallons;
- $13.72 monthly sewer service charge; and
- $5.3765 per thousand gallons for sewer through 10,000.
The actual rate sheet states effective October 1, 2025. Its document-center upload date of October 17 is not the rate’s effective date. Match the statement’s service period and meter class to the schedule.
Two complete calculations
| Usage | Water | Sewer | Combined visible rows |
|---|---|---|---|
| 4,000 gal. | $9.59 + 4×$1.6031 = $16.0024 | $13.72 + 4×$5.3765 = $35.2260 | $51.23 rounded |
| 8,000 gal. | $9.59 + 8×$1.6031 = $22.4148 | $13.72 + 8×$5.3765 = $56.7320 | $79.15 rounded after sum |
At 12,000 gallons, visible water rows produce about $29.57: base, 10,000 at $1.6031, then 2,000 at $1.9757. The matching sewer amount cannot be reproduced from either the FAQ or the rate sheet without confirmation. Record that as “City input needed,” not zero and not an extrapolated rate.
At 8,000 gallons, the unrounded components sum to $79.1468, which rounds to $79.15. Rounding the service rows first instead gives $22.41 + $56.73 = $79.14. The article uses the first method; neither method establishes the City’s actual billing-engine sequence.
What to check on the statement
Confirm provider, meter size, dates, billed gallons, and whether garbage, stormwater, irrigation, taxes, deposits, adjustments, or other services appear. Rounding can also differ if the billing system rounds each tier before summing.
This is a source-boundary audit as much as a rate calculation: a transparent blank is more useful than a confident number unsupported by the City table.
LSL rechecked the FAQ, document listing and complete one-page residential schedule on September 20, 2026, then independently recalculated each example. The higher-volume sewer blank remains a question for Utility Billing, not a missing number filled by LSL.