Water — Large Utility

Grouping 21600 meter reads into 11 month groups, 9 were safe to publish and 2 were withheld under the disclosure-control rules below. 83.3% of records and 79.2% of total total consumption remain in the published output, with a worst-case re-identification risk of 0% (Low).

• (n,k)-dominance — 2 groups withheld (triggered by your top-1 dominance limit p = 15%).
  ESSnet/Eurostat SDC Handbook §5.2 (Hundepool et al.)
• PII handling — identifiers are excluded from the analytic path; only disclosure-controlled aggregates are reported.
  NIST SP 800-122; NISTIR 8053

Synthetic sample data — for demonstration, not distribution. Generated by UnitTrack, a Polish Clover Solutions product.