purifying water history

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
purifying water history	1.09	0.5	6148	91	23
purifying	1	0.3	5756	17	9
water	1.45	0.2	3026	75	5
history	1.85	0.1	5574	91	7

Keyword	CPC	PCC	Volume	Score
purified water history	0.71	0.6	6599	5
history of water purifying	1.25	0.3	4837	65
when did water purification begin	1.85	0.9	2721	40
when was purified water invented	1.41	0.9	2157	30
when was water purification invented	0.4	0.8	2821	43
when did water purification start	1.19	0.7	7073	86
who invented water purification	0.48	0.3	2982	97
who invented water purification system	0.59	0.5	8107	15
how did ancient people purify water	0.07	0.7	4810	19
when was the water purifier invented	0.45	0.8	7023	8
purification of water reason	0.97	0.9	9727	28
first water purification system	0.14	0.7	136	87
history of clean water	0.86	0.5	7182	66
information about water purification	0.59	0.8	4060	53
purification of drinking water	0.29	0.5	9910	54
how is the water purified	1.74	0.8	6892	83
purification of water introduction	0.68	0.3	5641	74
water and its purification	0.59	0.1	4423	70
where does purified water come from	0.16	0.5	9410	62
water cleaned and purified	0.37	0.4	3106	49
water purification in industry	0.18	0.3	3252	80