when was purified water invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was purified water invented	0.74	0.2	8620	76	32
when	1.35	0.3	8636	61	4
was	1.25	0.1	8243	82	3
purified	1.26	0.9	6953	95	8
water	0.74	0.1	7726	37	5
invented	1.52	0.9	708	10	8

Keyword	CPC	PCC	Volume	Score
when was purified water invented	0.97	0.1	3164	26
who invented purified water	1.32	0.1	977	87
who invented water purification	0.23	0.8	7202	84
when was the water purifier invented	1.8	0.7	7354	36
when did water purification begin	1.22	0.6	4983	50
when did water purification start	1.95	0.8	8184	80
history of water purification	1.01	0.5	1093	1
who invented water purification system	0.9	0.6	5169	100
when was water invented	1.49	0.2	5010	58
when was drinking water invented	0.94	0.8	796	72
what year was water invented	1.71	0.4	2803	48
when was water first made	2	0.2	6214	89
where does purified water come from	1.4	0.8	1611	22
when was water created	0.68	0.9	7253	29
what year was water made	0.49	0.5	9050	41
first water purification system	1.31	0.3	9445	20
how is the water purified	1.22	0.4	8905	4
history of drinking water	1.61	0.4	8087	33