when was the water purifier invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the water purifier invented	1.51	0.3	3622	12	36
when	0.09	0.5	6668	57	4
was	1.91	0.4	7909	48	3
the	1.86	0.9	8306	45	3
water	0.15	0.6	4003	75	5
purifier	1.39	0.1	9613	9	8
invented	0.04	1	8679	4	8

Keyword	CPC	PCC	Volume	Score
when was the water purifier invented	1.41	0.8	3143	60
when was water purification invented	0.75	0.4	6345	31
when was purified water invented	1.26	0.3	6320	2
who invented water purification system	1.77	0.4	8087	44
who invented water purification	1.49	1	1520	99
the history of water purification	1.98	0.2	649	50
when did water purification start	1.63	0.4	7621	78
when did water purification begin	1.19	0.6	3141	78
first water purification system	1.13	0.7	6255	55
when was the water filter invented	1.09	0.6	5628	9
first need water purifier	0.5	0.3	6075	48
water purifier for factory	0.68	0.8	6444	83
history of air purifiers	0.48	0.5	4827	93
who invented the first water filter	0.84	0.2	4587	86
water purifier made in usa	0.27	0.7	7637	56
description of water purifier	1.58	0.7	9882	58
water purifier in usa	1.87	1	726	73
water purifier for industry	1.21	0.3	1622	84