A Sydney desalination figure needs a verb as well as a number. A plant can be capable of producing water, receive a production request or have a recorded volume supplied over a completed period. Each statement helps explain the system, but none should quietly change into a report of what is happening at a particular tap now.
If you want to know where an accommodation's water comes from, a citywide capacity description leaves the address question open. Keep capability, operating records and the region's accounting totals in separate notes, with each document's stated area and time interval attached.
Start with what the capacity statement says
Sydney Water describes the Kurnell plant as able to produce up to 250 million litres a day. The same explanation says production can be adjusted with demand.
The phrase up to belongs with the figure. Removing it would turn a capability into an asserted output. A daily maximum also does not identify how much was supplied during a particular month or how much of a property's water came from that source.
Engineering availability would need its own definition and time interval: what equipment or service was available, and over which period? A capacity description does not provide an availability percentage or prove continuous production at the maximum rate.
Read a production request as a request
The 2024 operational audit covers 19 September 2022 to 27 September 2024. Its introductory account describes producing and supplying water each month at Sydney Water's request.
This account places the production request inside the past operating period it describes. It does not establish a live operating rate in October 2026, or show that every request equals the plant's maximum capacity.
When reading a later announcement, distinguish what was requested from what was actually produced or delivered. Retain any start date, delivery period and qualification about maintenance or changed requirements. A request can describe intended production before a completed delivery record exists.
For current operation, look for a dated operator or utility statement that explicitly addresses it. A document's audit period remains the audit period when someone downloads the report years later.
Keep delivered water inside its accounting period
The Bureau of Meteorology's 2025 Sydney account covers 1 July 2024 to 30 June 2025. Its Table S12 says desalinated water contributed around 4% of total urban supply in that period.
That percentage belongs to a historical regional water account. It is not a plant availability rating or a current address blend. Comparing it directly with a daily capability figure would mix the time interval and the quantity being described.
Before comparing figures, match the unit and boundary: daily capability, completed-period plant delivery or regional supply share. If the documents do not provide matching information, retain the difference instead of calculating an unsupported utilisation rate.
The Sydney city guide provides general visitor context. For a source question about a particular stay, give Sydney Water the location and relevant dates; a regional annual share cannot identify what reached that building during the visit.
