Does A.O. Smith Remove Chlorine?

Yes

1 A.O. Smith model we track is independently certified to remove chlorine — a reverse-osmosis filter.

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 High Efficiency Reverse Osmosis AOS-HERO-CHR	reverse-osmosis	Details →

As an Amazon Associate we earn from qualifying purchases; buy links are affiliate links. Disclosure.

About chlorine

Residual disinfectant (MRDL 4 mg/L). Taste/odor; not a major health hazard at treatment levels but drives byproduct formation.

What A.O. Smith filters are certified to remove

Across the A.O. Smith models we track, here’s what their certifications actually cover.

✓ lead ✓ fluoride ✓ PFAS ✓ chlorine ✓ arsenic ✓ mercury ✓ chromium-6 ✓ copper ✓ nitrate ✓ TDS (total dissolved solids)

See every filter certified for chlorine — all brands, ranked.

Certified for chlorine →

Other brands & chlorine

PUR Yes Brita Yes Aquasana Yes Waterdrop Yes APEC Yes iSpring Yes Culligan Yes Doulton Yes Multipure Yes eSpring Yes Pentair Yes 3M Yes Express Water No Bluevua No Samsung Yes LG Yes Whirlpool Yes Frigidaire Yes

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 chlorine. See our methodology.