Water Filtration & RO — data notes

A reading guide to the Water Filtration & RO build: what it contains, how concentrated the market slice is, which fields are complete, and what the quality tier does and does not promise. All numbers below are computed from the current bundle (v2_20261115); they are descriptive, not a market forecast.

What this build contains

The bundle has 172 product records from 9 brands, with 100.0% of populated values carrying a source URL, quote and fetch time, and 100.0% of rows carrying at least one non-price spec field. Every value is a public-page extract; missing values are left null rather than inferred. Quality tier: lite.

Price and brand concentration

Listing prices in this build: median $260 (P25 $70, P75 $470, n=169). The largest collections are iSpring (75), Waterdrop (66), Express Water (15), Clearly Filtered (7), Culligan (3); the top brand (iSpring) accounts for 43.6% of records, which is useful context when using the bundle as a market sample — a five-brand build is a slice, not the whole category.

Field completeness

The best-populated non-price fields are listed below with their non-null counts and coverage. Buyers can filter on these fields immediately; fields not listed either fall below 20% coverage or are absent from this build.

Quality and limitations

This is a lite/inventory build: every row passes the price and spec-row coverage gates for its tier. 152 record(s) carry QA flags (for example, advertised capacity that does not match voltage × amp-hours); 3 record(s) have no listed price and are excluded from price analysis. Values were fetched on the source page date recorded per value, so live prices may differ after this build.

Refresh and citation

Version: v2_20261115. The public change log lists added, removed and price-changed records. Cite as: “nichelib, Water Filtration & RO dataset v2_20261115”, with the source URL per value kept in the licensed bundle. The free sample (20 rows, CSV/JSON) is available on the dataset page.