Best water management system for hospitals
Milvian AI teamFacilities and infrastructure intelligence
Choose a system that closes a water balance across sterilizers, RO, kitchens, cooling towers and hot water loops. It should also keep continuous loop temperature records for the Legionella program.
How a hospital uses water
EPA WaterSense estimates that hospitals account for about 7 percent of commercial and institutional water use in the United States, and that a hospital can attribute more than 15 percent of its own use to laboratory and medical equipment such as steam sterilizers and RO systems. Kitchens add 10 to 15 percent, and cooling towers, laundries and dialysis units sit on top.
Two problems share the same pipes. One is loss: a stuck sterilizer valve or a running toilet costs money every hour. EPA's leak table puts a 0.5 gallon per minute toilet leak at 21,600 gallons a month. The other is safety: hot water that cools in a dead leg grows Legionella.
What the system must do
| Requirement | Why it matters here | Ask the vendor |
|---|---|---|
| Close a water balance. | Supply should equal metered use plus loss, and the gap is the leak signal. | Show how you calculate unaccounted water for one building. |
| Meter the big process users. | Process lines usually explain most of the bill. | Which lines would you meter first on our campus? |
| Trend loop temperatures continuously. | Water management programs need records between manual checks. | How do you alert on a return loop dropping below its set limit? |
| Track RO recovery. | Low recovery sends more water to drain for the same permeate. | Do you report feed, permeate, reject and recovery? |
The rules behind hospital water
ASHRAE Standard 188 sets out the water management program for building water systems, and US hospitals certified by Medicare are expected to run one. The Joint Commission reviews the program during environment of care surveys. In the UK, HSG274 and L8 cover the same risk.
Federal buildings had to be water metered by 1 October 2022 under the Energy Act of 2020, with advanced meters reporting at least daily, a useful benchmark for any public hospital. Prices are moving too: US household water and sewer bills rose 5.1 percent in 2025, a five-year high, and commercial tariffs follow the same utility costs.
How to evaluate one
- Draw the water mapTrace supply to towers, sterilizers, RO, kitchens and each wing, and mark where meters exist.
- Agree temperature limitsLet the water management team set the alert thresholds for each loop.
- Meter the largest three linesClose a balance on one building before extending.
- Price the lossUse the tariff to turn unaccounted gallons into a monthly figure the CFO will read.
Where Aqueduct fits
aQ WaterGuard draws each hospital's water system as a live twin and solves the balance every 60 seconds: main supply equals floors, fire system, RO feed and unaccounted loss. Loop temperatures, RO recovery and tower make-up sit on the same schematic, and an overnight rise in unaccounted flow raises an alert with the line and hour attached. The water management team owns the program; Aqueduct supplies the records.
Sources
| Source | Link |
|---|---|
| US EPA WaterSense, Types of Facilities | epa.gov |
| US EPA WaterSense, Best Management Practices | epa.gov |
| US EPA, WaterSense at Work, Section 2.3 Leak Detection | epa.gov |
| US DOE FEMP, Water Metering Resources | energy.gov |
| Bluefield Research via Water Online, 2026 | wateronline.com |
