Utility disinfectants. Taste and odor are NSF/ANSI 42 territory. Chloramine needs a chloramine-specific listing and usually catalytic carbon.
Category
aesthetic
EPA status
Disinfectant residuals are regulated for public systems (e.g. Phoenix cites a 0.2 ppm minimum leaving the plant and a 4.0 ppm MRDL). Taste and odor are secondary / aesthetic.
Typical sources
Deliberately added at the treatment plant. Phoenix publishes chlorine. SCV Water publishes chloramine since 2005.
What actually fits
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Santa Clarita Valley: chloramine since 2005. SCV Water notes chloramine must be removed or neutralized for aquatic animals and kidney dialysis — follow medical and aquarium guidance from those professionals; we will not improvise it.
Whole-house carbon is the treatment type for taste and odor. A chlorine 42 listing is not a chloramine 42 listing. A softener is not a disinfectant filter.
Carbon that is only 42 is not a PFAS claim. See PFAS.