Answers
Questions people ask about the products we review, answered from our own data: every count, price and figure is read from the products we list, and every answer shows the products behind it.
We haven't answered that one yet. Search our products for it
Water Filtration 47 questions
All Water Filtration products
82 products
Do water filters remove fluoride?
82 of the 296 systems we list claim to reduce fluoride.
120 products
Do water filters remove lead?
120 of the 296 systems we list claim to reduce lead.
84 products
Do water filters remove PFAS?
84 of the 296 systems we list claim to reduce PFAS.
217 products
Do water filters remove chlorine?
217 of the 296 systems we list claim to reduce chlorine.
16 products
Do water filters remove microplastics?
16 of the 296 systems we list claim to reduce microplastics.
36 products
Do water filters remove hard water?
36 of the 296 systems we list claim to reduce hardness.
76 products
Do water filters remove TDS?
76 of the 296 systems we list claim to reduce TDS.
48 products
Do water filters remove bacteria?
48 of the 296 systems we list claim to reduce bacteria.
46 products
Do water filters remove iron?
46 of the 296 systems we list claim to reduce iron.
74 products
Do water filters remove arsenic?
74 of the 296 systems we list claim to reduce arsenic.
121 products
Do water filters remove sediment?
121 of the 296 systems we list claim to reduce sediment.
30 products
Do water filters remove hydrogen sulfide?
30 of the 296 systems we list claim to reduce hydrogen sulfide.
26 products
Do water filters remove chromium 6?
26 of the 296 systems we list claim to reduce chromium.
31 products
Do water filters remove nitrates?
31 of the 296 systems we list claim to reduce nitrate.
63 products
Does reverse osmosis remove fluoride?
63 of the 76 reverse osmosis systems we list claim to reduce fluoride.
49 products
Does reverse osmosis remove PFAS?
49 of the 76 reverse osmosis systems we list claim to reduce PFAS.
6 products
Does reverse osmosis remove microplastics?
Six of the 76 reverse osmosis systems we list claim to reduce microplastics.
64 products
Does reverse osmosis remove lead?
64 of the 76 reverse osmosis systems we list claim to reduce lead.
75 products
Does reverse osmosis remove minerals?
75 of the 76 reverse osmosis systems we list claim to reduce TDS.
9 products
Does reverse osmosis remove bacteria?
Nine of the 76 reverse osmosis systems we list claim to reduce bacteria.
11 products
Does reverse osmosis remove salt?
11 of the 76 reverse osmosis systems we list claim to reduce sodium.
4 products
Does reverse osmosis remove hard water?
Four of the 76 reverse osmosis systems we list claim to reduce hardness.
54 products
Does reverse osmosis remove arsenic?
54 of the 76 reverse osmosis systems we list claim to reduce arsenic.
35 products
How much does a water softener cost?
The 35 water softeners we list run from $160 to $3,294, with a median of $1,531.
69 products
How much does a reverse osmosis system cost?
The 69 reverse osmosis systems we list run from $165 to $3,779, with a median of $367.
55 products
How much does a whole house water filter cost?
The 55 whole house water filters we list run from $110 to $8,626, with a median of $1,105.
15 products
How much does a shower filter cost?
The 15 shower and faucet filters we list run from $30 to $170, with a median of $80.
20 products
How much does an under sink water filter cost?
The 20 under sink water filters we list run from $50 to $499, with a median of $161.
35 products
How much does a well water filter cost?
The 35 well water filters we list run from $550 to $6,235, with a median of $2,125.
35 products
How much does a UV water filter cost?
The 35 systems with a UV stage we list run from $169 to $6,640, with a median of $995.
69 products
How long do reverse osmosis filters last?
Of the 69 reverse osmosis systems we list, 64 state a filter life; the most common is 6-12 months (62).
35 products
How long do water softener filters last?
Of the 35 water softeners we list, 28 state a filter life; the most common is 6-12 months (14).
15 products
How long do shower filters last?
Of the 15 shower and faucet filters we list, 14 state a filter life; the most common is 6-12 months (9).
35 products
How long do UV filters last?
Of the 35 systems with a UV stage we list, 34 state a filter life; the most common is 6-12 months (28).
11 products
What does Berkey filter out?
Across the 11 Berkey systems we list, the makers claim reduction of 20 contaminants.
7 products
Does Berkey remove fluoride?
Seven of the 11 Berkey systems we list claim to reduce fluoride.
9 products
Does Berkey remove PFAS?
Nine of the 11 Berkey systems we list claim to reduce PFAS.
11 products
Does Berkey remove lead?
11 of the 11 Berkey systems we list claim to reduce lead.
7 products
Is Berkey worth it?
We list 11 Berkey products and score seven of them. Their overall scores run from 5.3 to 6.6, with a median of 6.4, against a median of 5.7 for all 284 products we score.
29 products
Is Waterdrop a good brand?
We list 29 Waterdrop products and score 29 of them. Their overall scores run from 5.0 to 7.6, with a median of 6.0, against a median of 5.7 for all 284 products we score.
18 products
Is Aquasana good?
We list 18 Aquasana products and score 18 of them. Their overall scores run from 4.8 to 6.7, with a median of 5.8, against a median of 5.7 for all 284 products we score.
18 products
What does Aquasana filter out?
Across the 18 Aquasana systems we list, the makers claim reduction of 31 contaminants.
18 products
How long do Aquasana filters last?
Of the 18 Aquasana systems we list, 18 state a filter life; the most common is 6-12 months (12).
6 products
Is Aquasure a good water softener?
We list six Aquasure water softeners and score six of them. Their overall scores run from 5.2 to 6.3, with a median of 6.0, against a median of 5.5 for all 35 water softeners we score.
30 products
What does Aquasure remove?
Across the 30 Aquasure systems we list, the makers claim reduction of 25 contaminants.
24 products
How long do iSpring filters last?
Of the 24 iSpring systems we list, 24 state a filter life; the most common is 6-12 months (22).
What water filters remove 14
82 products
Do water filters remove fluoride?
82 of the 296 systems we list claim to reduce fluoride.
120 products
Do water filters remove lead?
120 of the 296 systems we list claim to reduce lead.
84 products
Do water filters remove PFAS?
84 of the 296 systems we list claim to reduce PFAS.
217 products
Do water filters remove chlorine?
217 of the 296 systems we list claim to reduce chlorine.
16 products
Do water filters remove microplastics?
16 of the 296 systems we list claim to reduce microplastics.
36 products
Do water filters remove hard water?
36 of the 296 systems we list claim to reduce hardness.
76 products
Do water filters remove TDS?
76 of the 296 systems we list claim to reduce TDS.
48 products
Do water filters remove bacteria?
48 of the 296 systems we list claim to reduce bacteria.
46 products
Do water filters remove iron?
46 of the 296 systems we list claim to reduce iron.
74 products
Do water filters remove arsenic?
74 of the 296 systems we list claim to reduce arsenic.
121 products
Do water filters remove sediment?
121 of the 296 systems we list claim to reduce sediment.
30 products
Do water filters remove hydrogen sulfide?
30 of the 296 systems we list claim to reduce hydrogen sulfide.
26 products
Do water filters remove chromium 6?
26 of the 296 systems we list claim to reduce chromium.
31 products
Do water filters remove nitrates?
31 of the 296 systems we list claim to reduce nitrate.
What reverse osmosis removes 9
63 products
Does reverse osmosis remove fluoride?
63 of the 76 reverse osmosis systems we list claim to reduce fluoride.
49 products
Does reverse osmosis remove PFAS?
49 of the 76 reverse osmosis systems we list claim to reduce PFAS.
6 products
Does reverse osmosis remove microplastics?
Six of the 76 reverse osmosis systems we list claim to reduce microplastics.
64 products
Does reverse osmosis remove lead?
64 of the 76 reverse osmosis systems we list claim to reduce lead.
75 products
Does reverse osmosis remove minerals?
75 of the 76 reverse osmosis systems we list claim to reduce TDS.
9 products
Does reverse osmosis remove bacteria?
Nine of the 76 reverse osmosis systems we list claim to reduce bacteria.
11 products
Does reverse osmosis remove salt?
11 of the 76 reverse osmosis systems we list claim to reduce sodium.
4 products
Does reverse osmosis remove hard water?
Four of the 76 reverse osmosis systems we list claim to reduce hardness.
54 products
Does reverse osmosis remove arsenic?
54 of the 76 reverse osmosis systems we list claim to reduce arsenic.
What water softeners remove 1
What they cost 7
35 products
How much does a water softener cost?
The 35 water softeners we list run from $160 to $3,294, with a median of $1,531.
69 products
How much does a reverse osmosis system cost?
The 69 reverse osmosis systems we list run from $165 to $3,779, with a median of $367.
55 products
How much does a whole house water filter cost?
The 55 whole house water filters we list run from $110 to $8,626, with a median of $1,105.
15 products
How much does a shower filter cost?
The 15 shower and faucet filters we list run from $30 to $170, with a median of $80.
20 products
How much does an under sink water filter cost?
The 20 under sink water filters we list run from $50 to $499, with a median of $161.
35 products
How much does a well water filter cost?
The 35 well water filters we list run from $550 to $6,235, with a median of $2,125.
35 products
How much does a UV water filter cost?
The 35 systems with a UV stage we list run from $169 to $6,640, with a median of $995.
How long filters last 4
69 products
How long do reverse osmosis filters last?
Of the 69 reverse osmosis systems we list, 64 state a filter life; the most common is 6-12 months (62).
35 products
How long do water softener filters last?
Of the 35 water softeners we list, 28 state a filter life; the most common is 6-12 months (14).
15 products
How long do shower filters last?
Of the 15 shower and faucet filters we list, 14 state a filter life; the most common is 6-12 months (9).
35 products
How long do UV filters last?
Of the 35 systems with a UV stage we list, 34 state a filter life; the most common is 6-12 months (28).
Brands 12
11 products
What does Berkey filter out?
Across the 11 Berkey systems we list, the makers claim reduction of 20 contaminants.
7 products
Does Berkey remove fluoride?
Seven of the 11 Berkey systems we list claim to reduce fluoride.
9 products
Does Berkey remove PFAS?
Nine of the 11 Berkey systems we list claim to reduce PFAS.
11 products
Does Berkey remove lead?
11 of the 11 Berkey systems we list claim to reduce lead.
7 products
Is Berkey worth it?
We list 11 Berkey products and score seven of them. Their overall scores run from 5.3 to 6.6, with a median of 6.4, against a median of 5.7 for all 284 products we score.
29 products
Is Waterdrop a good brand?
We list 29 Waterdrop products and score 29 of them. Their overall scores run from 5.0 to 7.6, with a median of 6.0, against a median of 5.7 for all 284 products we score.
18 products
Is Aquasana good?
We list 18 Aquasana products and score 18 of them. Their overall scores run from 4.8 to 6.7, with a median of 5.8, against a median of 5.7 for all 284 products we score.
18 products
What does Aquasana filter out?
Across the 18 Aquasana systems we list, the makers claim reduction of 31 contaminants.
18 products
How long do Aquasana filters last?
Of the 18 Aquasana systems we list, 18 state a filter life; the most common is 6-12 months (12).
6 products
Is Aquasure a good water softener?
We list six Aquasure water softeners and score six of them. Their overall scores run from 5.2 to 6.3, with a median of 6.0, against a median of 5.5 for all 35 water softeners we score.
30 products
What does Aquasure remove?
Across the 30 Aquasure systems we list, the makers claim reduction of 25 contaminants.
24 products
How long do iSpring filters last?
Of the 24 iSpring systems we list, 24 state a filter life; the most common is 6-12 months (22).

