# Wilson Municipal Water — water loss as filed PSC · PWS 6545 · filings 2016–2025 https://municorn.us/water-loss/wi/wilson-municipal-water/ > **Cite as:** Municorn.us, "Wilson Municipal Water — water loss as filed", Municorn water loss index, https://municorn.us/water-loss/wi/wilson-municipal-water/ (source filings retrieved 2026-09-08). > **Licence:** CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/ — reuse and redistribution are permitted with attribution to Municorn.us and a link to this URL. > **Caveat that must travel with these figures:** "Water loss" is at least three different quantities depending on the jurisdiction, and nothing here supports a comparison between states. ## Summary Wilson Municipal Water reported **33.6% non-revenue water** in FY2025, higher than 89% of the 562 Wisconsin systems that filed that year. **The series is not stable enough to act on**: it moves 22.4 points a year against a Wisconsin median of 5.1. **The water balance is not a check here.** PSC derives water losses from system input minus authorized consumption, so this decomposition holds by construction. ## Filed history | Year | Non-revenue water % | System input (MG) | |---|---|---| | 2025 | 33.6% | 3.45 | | 2024 | 23.8% | 2.86 | | 2023 | 12.2% | 3.07 | | 2022 | 13.2% | 2.93 | | 2021 | 72.5% | 8.25 | | 2020 | 48.0% | 4.69 | | 2019 | 19.3% | 2.63 | | 2018 | 17.1% | 2.59 | | 2017 | 13.8% | 2.76 | | 2016 | 74.5% | 9.61 | ## What this source cannot say No filed year on this page carries a retail rate or a production cost, so no figure here is valued. A loss volume is not a loss in dollars, and this site will not supply a price that was not filed. ## Source Public Service Commission of Wisconsin, municipal annual report Schedule W-15. Retrieved 2026-09-08. https://apps.psc.wi.gov/ARS/WEGSqueries/default.aspx The FY2025 loss figure: (system input − billed authorized) ÷ system input × 100, from system input volume at `Sheet1!H553`; billed authorized consumption at `Sheet1!I553` — in `data/archive/wi-psc-water-audit/2026-09-08-5ef7d6e2fdbd.csv` (sha256 5ef7d6e2fdbdac2b, retrieved 2026-09-08, https://apps.psc.wi.gov/ARS/WEGSqueries/default.aspx), read by `src/scrape/wi.ts` at 6d6d5f59e8fb. Volumes are normalized to million gallons on ingest; the export reports them in the unit each filing states. Figures are as filed unless stated otherwise. If a number here is wrong it is wrong in the filing or wrong in our reading of it, and both are worth knowing: ammar@municorn.us _Municorn.us · https://municorn.us/water-loss/wi/wilson-municipal-water/ · CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ · source filings retrieved 2026-09-08_ --- ## Debt outstanding, and what covers the interest **No bonds outstanding at the end of 2025.** This is principal outstanding on the water utility's own balance sheet, on the Commission's own test: it files no electric operating report. | Year | Debt outstanding | Issues | Net revenue | Interest | Coverage | |---|---:|---:|---:|---:|---:| | 2025 | $0 | 0 | -$19,454 | $0 | — | | 2024 | $0 | 0 | -$14,865 | $0 | — | | 2023 | $0 | 0 | $8,926 | $0 | — | | 2022 | $0 | 0 | -$8,964 | $0 | — | | 2021 | $0 | 0 | $10,524 | $0 | — | | 2020 | $0 | 1 | $3,885 | $300 | 12.95 | | 2019 | $6,000 | 1 | $10,828 | $450 | 24.06 | | 2018 | $12,000 | 1 | $6,852 | $725 | 9.45 | | 2017 | $17,000 | 1 | $6,226 | $975 | 6.39 | | 2016 | $22,000 | 1 | $5,088 | $1,225 | 4.15 | This utility filed no interest expense for the year, so there is nothing for a coverage ratio to cover. 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.