Does Culligan Remove Nitrate?
Yes
3 Culligan models we track are independently certified to remove nitrate — a reverse-osmosis filter.
Based on the itemized NSF, WQA & IAPMO certified-model listings we track for Culligan (39 of 74 models).
Which Culligan 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 | |
|---|---|---|
| Culligan RO (2 yr) · Aquasential | reverse-osmosis | Details → |
| Culligan Smart RO (2yr) Nitrate · Aquasential | reverse-osmosis | Details → |
| Culligan Smart RO Nitrate · Aquasential | reverse-osmosis | Details → |
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About nitrate
Causes 'blue baby syndrome' (methemoglobinemia) in infants under 6 months; MCL 10 mg/L as N. Runoff from fertilizer, septic, manure.
What Culligan filters are certified to remove
Across the Culligan models we track, here’s what their certifications actually cover.
See every filter certified for nitrate — all brands, ranked.
Certified for nitrate → Other brands & nitrate
How we know: we normalize the public certified-product listings from NSF, WQA, and IAPMO. A “yes” means a specific Culligan model is listed as certified for nitrate. See our methodology.