Are refrigerator water filters certified to NSF standard 42 and 53 truly superior for removing contaminants in older municipal water systems?
Download run
Fan-out diagram
The searches the AI actually ran for this prompt.
SEED QUERY
Are refrigerator water filters certified to NSF standard 42 and 53 truly superior for removing contaminants in older municipal water systems?
2 real searches · 1 real-search pass
Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.
Query classes
Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.
ChatGPT real searches (2)
Classes come from the query-classifier (a local Laya model). 2 of 2 calls are low-confidence (under 50%) — hover a query in the table to see its confidence.
Searches and sources
ChatGPT2 real searches · gpt-6
NSF ANSI 42 53 refrigerator water filter certification contaminant reduction claims lead older municipal water EPA CDC Google ↗
EPA home water filters NSF 42 53 lead drinking water certification filter replacement Google ↗
- NSF Standards for Water Treatment Systems · nsf.org
- NSF/ANSI 42, 53 and 401: Filtration Systems Standards · nsf.org
- About Choosing Home Water Filters | Drinking Water · cdc.gov
- Consumer Tool for Identifying Point-of-Use and Pitcher Filters Certified to Reduce Lead in Drinking Water · epa.gov
- Consumer Tool for Identifying Point-of-Use and Pitcher Filters Certified to Reduce Lead in Drinking Water · epa.gov
- Follow-up to drinking water · epa.gov
- About Choosing Home Water Filters | Drinking Water · cdc.gov
- Listing Category Search Page Results · info.nsf.org
- WaterSense Guide to Selecting Water Treatment Systems · epa.gov
- Reducing PFAS in Your Drinking Water with a Home Filter · epa.gov
Queries
2 queries · click a column to sort
| Query / type | Search | Intent | Query class | Routing format | Cluster | Freq ↓ | Weight |
|---|---|---|---|---|---|---|---|
NSF ANSI 42 53 refrigerator water filter certification contaminant reduction claims lead older municipal water EPA CDC OBSERVED | Google ↗ AI Mode ↗ | — | Reason | — | — | 1x of 1 | |
EPA home water filters NSF 42 53 lead drinking water certification filter replacement OBSERVED | Google ↗ AI Mode ↗ | — | Other / navigational | — | — | 1x of 1 |