Stone Lake Sanitary District
What Stone Lake Sanitary District filed with PSC about the water it produced and the water it billed for, 2016–2025 — and what the filing does and does not let anyone verify.
- Non-revenue water, FY2025
- 63.2% Computed from filed system input and billed consumption.
- system input volume 9.15 sheet Sheet1, cell H486 · thousands of gallons, declared in the column header, divided by 1,000 · net of water sold to wholesale customers, which is the volume entering this utility's own distribution system
- billed authorized consumption 3.37 sheet Sheet1, cell I486 · thousands of gallons, declared in the column header, divided by 1,000
- Annual value of the filed loss
- — Not estimable from what PSC publishes. A loss percentage cannot be priced without the volume it is a share of.
2026-09-08-5ef7d6e2fdbd.csvSheet1 H486agency source
Where this figure comes from
(system input − billed authorized) ÷ system input × 100
Read from data/archive/wi-psc-water-audit/2026-09-08-5ef7d6e2fdbd.csv (SHA-256 5ef7d6e2fdbdac2b), our archived copy of the file as it stood on 2026-09-08. That path is committed to the repository and is not served here. The agency publishes its own current copy at https://apps.psc.wi.gov/ARS/WEGSqueries/default.aspx, which may since have been revised.
What the record shows
63.2% non-revenue water in FY2025, higher than 99% of the 562 Wisconsin systems that filed that year.
- The figure is getting worse across the record.
It does not establish what moved. A meter replacement program, a main break, a change of billing system, a corrected prior-year filing and an ordinary reporting error all produce a series that looks like this, and a filed water loss audit does not say which happened. What the flag does say is that the years disagree with each other by more than most of the state's do, so a single year of this series is a weak basis for a decision without the records behind it.
Debt outstanding, and what covers the interest
$602,341 of long-term debt outstanding at the end of 2025, across 3 bond issues. This is principal outstanding on a combined water and sewer utility's balance sheet, which the Commission files as one.
| Year | Debt outstanding | Issues |
|---|---|---|
| 2025 | $602,341 | 3 |
| 2024 | $620,680 | 3 |
| 2023 | $638,526 | 3 |
| 2022 | $655,890 | 3 |
| 2021 | $672,786 | 3 |
| 2020 | $689,226 | 3 |
| 2019 | $705,225 | 3 |
| 2018 | $720,844 | 3 |
| 2017 | $735,990 | 3 |
| 2016 | $755,169 | 3 |
This utility's balance sheet and income statement are water and sewer, filed as one. A coverage ratio computed from them would put one service's revenue over another service's interest.
Figures are as filed with the Commission under Wis. Admin. Code ch. PSC 185 and are not audited as presented. Nothing here is a credit opinion, an implied rating, or a judgement that any figure is sufficient. Source: Public Service Commission of Wisconsin, annual report financial schedules, 2016–2025, retrieved 2026-09-12.
PSC derives water losses from system input minus authorized consumption, so these parts sum to the whole on every filing. What a filing can get wrong is which of these numbers were measured.
Where these volumes come from
- System input 9.15 MG sheet Sheet1, cell H486 · thousands of gallons, declared in the column header, divided by 1,000 · net of water sold to wholesale customers, which is the volume entering this utility's own distribution system
- Billed authorized 3.37 MG sheet Sheet1, cell I486 · thousands of gallons, declared in the column header, divided by 1,000
- Unbilled authorized 0.13 MG sheet Sheet1, cell O486 · thousands of gallons, declared in the column header, divided by 1,000
- Apparent loss 0 MG sheet Sheet1, cell R486 · thousands of gallons, declared in the column header, divided by 1,000
- Real loss 5.65 MG sheet Sheet1, cell U486 · thousands of gallons, declared in the column header, divided by 1,000
From data/archive/wi-psc-water-audit/2026-09-08-5ef7d6e2fdbd.csv (SHA-256 5ef7d6e2fdbdac2b), retrieved 2026-09-08 from the published source.
| Year | NRW | Input (MG) |
|---|---|---|
| 2025 | 63.2% | 9.15 |
| 2024 | 37.3% | 4.85 |
| 2023 | 37.0% | 7.25 |
| 2022 | 30.6% | 6.57 |
| 2021 | 49.7% | 9.37 |
| 2020 | 55.5% | 8.4 |
| 2019 | 49.9% | 7.57 |
| 2018 | 38.4% | 6.8 |
| 2017 | 38.7% | 6.39 |
| 2016 | 44.2% | 6.39 |
Balance closure is inapplicable on every filed year above, so the column that repeated it is not shown. PSC derives water losses from system input minus authorized consumption, so this decomposition holds by construction. This is neither a pass nor a disclosure gap.
Other Wisconsin systems
PSC publishes no county or connection count for these systems, so they cannot be ranked against this one. These are other filers, not comparables.
- Cobb Municipal Water
- Cochrane Municipal Water
- Colby Municipal Water
- Coleman Water
- Colfax Municipal Water And Sewer
- Coloma Municipal Water
- Columbus Water And Light
- Combined Locks Water
Where is it going?
This page values the loss. It cannot say which accounts, which zones, or which meters, and it cannot say how much of that value is collectable. Answering either takes your billing history, your meter reads, and your production data reconciled against each other.
Our Water Loss Recovery Snapshot is three weeks, one flat fee, and the deliverable is a ranked list of specific accounts and zones with dollars and a confidence on each.
See what the Snapshot delivers Email us about Stone Lake Sanitary DistrictSources and corrections. Every figure above is either filed by the utility or computed from filed figures, and each one says which. If a number here looks wrong, tell us: the error may be in the filing, in our reading of it, or in something the export does not show. Send a correction. We will check it against the source, correct the page where it is wrong, and say what changed.
- Public Service Commission of Wisconsin, municipal annual report Schedule W-15. Retrieved 2026-09-08 from data/archive/wi-psc-water-audit/2026-09-08-5ef7d6e2fdbd.csv. https://apps.psc.wi.gov/ARS/WEGSqueries/default.aspx