unchlorinated
/ʌnˈklɔrɪneɪtɪd/
adjective
- Not treated with chlorine, especially referring to water that has not been disinfected or purified using chlorine.
- Many hikers prefer to drink from unchlorinated mountain springs.
- The swimming pool uses unchlorinated saltwater instead of harsh chemicals.
- Unchlorinated tap water can sometimes contain bacteria that chlorine would normally kill.
Synonyms