Start with your pool
In Phoenix and Scottsdale, a pool's water level can change for several reasons. The EPA's pool water-efficiency guide names evaporation, cleaning, leaks and splashing. Before trying to explain a change, learn what the waterline and refill pattern usually look like at your own pool.
Choose one repeatable point of reference
Notice where the water normally sits relative to a fixed feature, such as a tile line or skimmer opening. Check from the same place at roughly the same time of day. A dated photo from the same angle can help you describe a change. It cannot identify a leak or measure total water use by itself.
If the level falls unexpectedly, record what you see and mention it to your pool professional. Do not ignore a persistent change simply because evaporation is common here.
Notice the refill pattern
If your pool has an automatic filler, note whether it seems to run more often or for longer than usual. If you refill manually, keep a simple record of when you add water. You do not need to estimate gallons from memory. Tell your service professional about a noticeable change and ask what should be measured at your property.
Add the context around that day
Was the cover off, a water feature running, or the pool especially busy? Did a recent service include filter cleaning? Note those facts beside the waterline or refill observation. They may help the professional decide whether the change fits routine use or needs a closer assessment. Do not change equipment settings or skip necessary care just to see whether the level changes.
A simple weekly habit is to note the waterline, refill activity and any wet area that stays wet when it should not. Share a dated observation rather than a diagnosis. For broader family habits around covers, splash-out and water care, see our pool-water conservation guide. If your level changes unexpectedly, a professional can help decide what to check next; this log gives that conversation a useful starting point.
Updated
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