Click below to learn about the pH scale.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
pH Level 1
Low-pH water will corrode or dissolve metals and other substances.
Extremely Acidic
Battery Acid
pH Level 2
Low-pH water will corrode or dissolve metals and other substances.
Very Acidic
Gastric Acid
pH Level 3
Very Acidic
Hydrochloric Acid
pH Level 4
Moderately Acidic
Soda
pH Level 5
Moderately Acidic
Soda
pH Level 6
The human body self-regulates its pH at 7.4
Slightly Acidic
Black Coffee
pH Level 7
The human body self-regulates its pH at 7.4
Neutral
Pure Water
pH Level 8
The human body self-regulates its pH at 7.4
Slightly Alkaline
Sea Water
pH Level 9
Slightly Alkaline
Baking Soda
pH Level 10
Moderately Alkaline
Milk of Magnesium
pH Level 11
Moderately Alkaline
Ammonia
pH Level 12
Very Alkaline
Soapy Water
pH Level 13
High pH causes a bitter taste. Water pipes and water-using appliances become encrusted with deposits.
Very Alkaline
Bleach
pH Level 14
High pH causes a bitter taste. Water pipes and water-using appliances become encrusted with deposits.
Extremely Alkaline
Drain Cleaner