Water quality isn't on a standard home inspection, but in San Diego and Orange County's hard-water region it affects everything from the water heater to the dishwasher. A quick check tells a buyer what they're inheriting and gives a seller a clean story to tell.
Before you buy: what to inspect
Signs & existing equipment
- Hard-water scale on fixtures, glassware, and showerheads
- Any existing water softener or filtration — age, type, and condition
- Whether a softener is actually working (and was maintained)
- Discolored, cloudy, or odorous water
- Scale buildup or short life on the current water heater
Before you sell: California point-of-sale items
California requires certain items to be addressed when a home changes hands. Confirm the specifics with your agent and local jurisdiction.
What sellers should prepare
- Disclose the condition and age of any softener or filtration system
- Service or note any system that's past its life so it isn't a surprise
- Be ready to share water-quality history if asked
Buying or selling? Get a quick read on the home's water quality.
Frequently asked questions
Does a home inspection test water quality?
Generally no. A standard inspection doesn't assess hardness or the condition of softening/filtration equipment. A quick water-quality check fills that gap, which matters a lot in our hard-water region.
Is a leftover water softener a good thing when buying?
Only if it works and was maintained — an unmaintained softener can do little or even cause problems. We can tell you whether it's an asset or something to budget around.
How does hard water affect what I'm buying?
Scale shortens the life of water heaters, fixtures, and appliances. Knowing the home's water hardness helps you anticipate maintenance and decide whether treatment is worth it.
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Reviewed by John Stevenson Plumbing, Heating & Air. Based on our experience assessing water quality and treatment equipment across the hard-water areas of North San Diego County and Orange County. Disclosure obligations vary — confirm specifics with your agent. Last updated 2026-06-25.