Courtyard Apartments — Hackensack, NJ
18% Water Reduction · $4,549/yr Saved
80-unit mid-rise apartment building. Municipal water supply, 3″ meter. No sewerage charge. Flow Dynamics M&V-verified — 11-month billing period comparison with raw meter data.
Before: Apr 2014–Mar 2015 · After: Apr 2015–Mar 2016 · 80 Units
Per-unit consumption fell from 146 gal/unit/day to 109 gal/unit/day — an 18% reduction. No change in occupancy.
80 units × per-unit daily consumption · 3″ meter
Total building usage dropped from 11,680 to 8,720 gallons per day — 842,928 gallons saved annually.
Same 11-month billing windows — one year before install vs. one year after
Monthly water cost dropped from $2,096.31 to $1,717.27 — saving $379.04/month · $4,549/yr annualized.
Key Findings
The case study uses raw water meter readings across 26 individual billing periods — 14 months before and 12 months after installation. This is IPMVP-grade measurement, not a single-period estimate.
Per-unit daily consumption dropped from 146 gal/unit/day to 109 gal/unit/day — consistent across all post-install billing periods, confirming the savings are structural, not seasonal.
This property is not subject to a sewerage charge, meaning the $4,549/yr savings comes entirely from reduced water consumption. Properties with sewer charges would see proportionally higher total savings.
At current water rates, the 10-year projection is $45,490. If water rates increase (which they historically do annually), the actual savings will be higher.
Property Details
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