# Blackstone — water loss as filed

MassDEP · PWS 2032000 · filings 2019–2025
https://municorn.us/water-loss/ma/blackstone/

## Summary

Blackstone reported **2.0% unaccounted-for water** in FY2024, within the Massachusetts standard of 10% and higher than 3% of the 278 systems that filed that year. It has been over the standard in 1 of its 6 reported years. The figure is trending better across the record. **The series is not stable enough to act on**: it moves 11.6 points a year against a state median of 3.8, including 34% to 4% in FY2023. Real losses do not change that fast, so the movement is describing measurement and recordkeeping rather than water, and which year is closer to true cannot be settled from this filing.

## Filed history

| Year | Unaccounted-for water % | Residential gal/capita/day |
|---|---|---|
| 2025 |  | 36.8 |
| 2024 | 2 | 40 |
| 2023 | 4 | 39 |
| 2022 | **34** | 29 |
| 2021 | 10 | 40 |
| 2020 | 10 | 46.9 |
| 2019 | 8 |  |

Bold is above the Massachusetts standard — 10% unaccounted-for water, 65 gallons per
capita per day. The two series end in different years — MassDEP publishes residential use a year ahead of unaccounted-for water.

## Source

MassDEP — DEP-approved performance standards for Massachusetts public water suppliers. Retrieved 2026-08-09. https://www.mass.gov/info-details/public-water-supply-tools-resources-performance-standards

MassDEP publishes these as percentages rather than volumes, so no dollar figure is derivable from this source. The volumes are in this system's own Annual Statistical Report.

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

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