What does potability mean?
Potability means the quality of being safe and suitable for drinking. The word is most often used when discussing water supplies, beverages, food safety, or substances being examined for contamination. Although a substance may appear clean or taste acceptable, that does not necessarily establish its potability; technical testing may be required to determine whether it meets safety standards. In ordinary conversation, people are more likely to say that water is drinkable or safe to drink. Potability is therefore especially useful in formal and scientific writing, where it names the specific property being assessed. Its rarity gives it a technical and precise character, while its connection to health and public safety makes it relevant whenever drinking water quality is discussed.
nounPotability is the quality or state of being suitable for drinking. It is a formal term used especially in relation to water, beverages, or substances whose safety for human consumption is being assessed.
- The quality or state of being suitable for drinking.
"The laboratory tested the water's potability before allowing it to be distributed to the community."
"Local authorities regularly monitor the potability of public water supplies."
"Boiling can improve the potability of water that has been contaminated, although it does not remove every chemical contaminant."
The plural is grammatically regular but very rarely needed in modern usage.
"The report compared the potabilities of several municipal water sources."
Potability turns a simple question into a technical one: is this liquid merely drinkable, or officially fit for people to drink?
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does potability come from?
Potability was formed in the early 19th century from the adjective potable and the suffix -ity. The adjective potable comes through Old French from Latin potabilis, derived from potare, meaning “to drink.” The same Latin family also includes words such as potion and potation, which connect the modern term to its older vocabulary of drinking and medicinal drinks.
How potability is actually used
Potability is formal and relatively uncommon. It is more typical of public health, environmental science, water-quality testing, and technical or regulatory contexts than of everyday conversation.
Easily confused with potability
Potable is normally the adjective meaning safe or suitable for drinking, whereas potability is the noun naming that quality.