Water — Large Utility
Disclosure control & data provenance
Grouping the dataset into 2 year groups, 2 were safe to publish and 0 were withheld under the rules below. Across 21600 meter reads, 100.0% of records and 100.0% of total total consumption remain in the published output, with worst-case re-identification risk of 0% (Low).
Anomalies are flagged, not dropped; rows failing validation are quarantined as rejected. 1632 reads (7.6%) lack coordinates and are excluded from spatial views.
- No groups required suppression at these settings (k = 15).
-
PII handling — identifiers are excluded from the analytic
path; only disclosure-controlled aggregates are reported.
NIST SP 800-122; NISTIR 8053
| Year | Total consumption (CCF) | Contributors | Status |
|---|---|---|---|
| 2023 | 5,006,595 | 1800 | Published |
| 2024 | 187,286 | 1800 | Published |
Consumption profile
| 10th | 165 |
| 25th | 235 |
| Median | 375 |
| 75th | 729 |
| 90th | 2580 |
Weather & seasonality
E = 310 + -0.3252·HDD · base 65°F · 11 months
Differential privacy — an alternative release
An alternative to suppression: instead of hiding small groups, calibrated Laplace noise is added to each count (ε = 1.0, scale b = 1.0) so no individual's presence can be inferred while totals stay useful. Mean absolute error ±0.7 across 3 groups.
Appendix — policy & citations
| Governing standard | 15/15 rule |
| Minimum group size (k) | 15 |
| Dominance (top-n ≤ p) | 1 ≤ 0.15 |
| Min accounts for models | 15 |
| Grouping | Year |
- k-anonymity — Sweeney (2002); ESSnet/Eurostat SDC Handbook
- (n,k)-dominance — ESSnet SDC Handbook §4.2; CPUC 15/15
- Inequality — Gini (1912); Lorenz (1905)
- Spatial — Moran (1950); Cliff & Ord (1973)
- Weather / M&V — ASHRAE Guideline 14; IPMVP Option C; PRISM
- Benchmarking — EPA ENERGY STAR; DOE/EIA CBECS/RECS
- Load — NREL UMP; BPA M&V Peak Demand
- Burden — ACEEE; US Census ACS
- Differential privacy — Dwork et al. (2006); US Census 2020 DAS
- PII — NIST SP 800-122; NISTIR 8053; NIST SP 800-188
- Methods & Formulas — every rule & analysis with its formula-as-implemented and primary citation
Synthetic sample data — for demonstration, not distribution. Generated by UnitTrack, a Polish Clover Solutions product · 2026-07-28 21:48.