Does A.O. Smith remove TDS (total dissolved solids)?
Based on the itemized NSF, WQA & IAPMO certified-model listings we track for A.O. Smith (2 of 7 models) — coverage for this brand is partial, so we only state what is confirmed certified, not what isn’t.
Which A.O. Smith models are certified
Certification is per model — make sure the product you buy is one of these specific certified models, not just the same brand.
| Certified model | Type | |
|---|---|---|
| A.O. Smith AORO-50 | reverse-osmosis | Buy on Amazon → |
| A.O. Smith High Efficiency Reverse Osmosis AOS-HERO-CHR | reverse-osmosis | Buy on Amazon → |
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About TDS (total dissolved solids)
Total dissolved solids (TDS) are the combined minerals, salts, and metals in water. High TDS affects taste and can indicate other issues; reverse osmosis is the main certified way to reduce it.
What A.O. Smith filters are certified to remove
Across the A.O. Smith models we track, here’s what their certifications actually cover.
How we know: we normalize the public certified-product listings from NSF, WQA, and IAPMO. A “yes” means a specific A.O. Smith model is listed as certified for TDS (total dissolved solids). See our methodology.