Independent audit: Gilbert water meters, billing largely accurate; 2.9% of accounts showed anomalies

Summary

An independent Kimley‑Horn audit found about 97.1% of Gilbert water accounts recorded usage and were billed accurately from 2020–2025, while roughly 2.9% of accounts (about 2,700) experienced at least one anomaly; auditors recommended targeted fixes, multiplier checks and continued meter replacement.

Kimley‑Horn presented preliminary results of a comprehensive water meter audit to the Gilbert Town Council on April 7, saying the testing and data review found the system to be fundamentally sound but identified targeted anomalies affecting a small share of accounts.

"We can validate that statement that there are no system‑wide issues," the audit team said, reporting that about 97.1% of all accounts were recording usage and billed accurately during the audit period (Jan. 1, 2020–Dec. 31, 2025). The firm said roughly 2.9% of active accounts — about 2,700 of roughly 93,000 accounts — experienced at least one issue during the six‑year period.

The firm analyzed more than 7 million consumption transactions and concluded 99.5% of those transactions were calculated correctly; 0.5% were incorrect due to causes such as canceled bills,…

Independent audit: Gilbert water meters, billing largely accurate; 2.9% of accounts showed anomalies

Summary

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