Home & Cleaning
R3 has independently scored 9 under sink water filter products for safety on a 0 to 10 scale. The average safety score is 8.7/10, 7 score 9.0 or higher, and Clearly Filtered 3-Stage Under-the-Sink Water Filtration System leads the category at 10/10.
Across the 9 under sink water filter products R3 scored, safety scores range from 4/10 to 10/10, with a median of 10/10. The distribution below shows how many land in each safety band.
Highest safety score
Clearly Filtered 3-Stage Under-the-Sink Water Filtration SystemSafety 10/10, the top of 9 under sink water filter products R3 scored.
Lowest safety score
Frizzlife SK99 Direct-Connect Under-Sink Water Filter SystemSafety 4/10, the lowest in the set, scored the same way as every other product in the category.
Source: R3 (2026). Safety scores on a 0 to 10 scale across 9 independently scored under sink water filter products.
R3 has independently scored 9 under sink water filter products for safety, with an average safety score of 8.7/10 and a median of 10/10. Scores range from 4/10 to 10/10.
Clearly Filtered 3-Stage Under-the-Sink Water Filtration System has the highest safety score among the 9 under sink water filter products R3 scored, at 10/10. 7 of 9 score 9.0 or higher on safety.