Is Drinking Chlorinated Water Safe?

Public water systems have been adding chlorine to our municipal water supplies for decades. But how does chlorine affect water quality, and is chlorine water safe to drink?

Yes, according to the CDC: “Chlorine levels up to 4 milligrams per liter (mg/L or 4 parts per million (ppm)) are considered safe in drinking waterexternal icon. At this level, harmful health effects are unlikely to occur.”

Chlorine itself is safe in drinking water, but there are some side-effects of chlorine disinfection that may make drinking water dangerous for ingestion.

Why Is Drinking Water Chlorinated?

Drinking water chlorination kills microbes and prevents them from causing sickness. Chlorine is one of the most common treatment chemicals, although there are others that may also be used, including chloramine.

The Chlorine Concentration First, the concentration of chlorine present in a water supply may affect the safety of the water.

Factors Affecting The Safety Of Chlorine In Drinking Water

Water that’s naturally higher in organic matter is more likely to have a higher concentration of disinfection byproducts, again because of the increased opportunity for chlorine to react with this material.

The Presence Of Organic Matter

Chlorine dissipates naturally over time, so water that has traveled a longer distance to reach your faucet will contain less of this chemical than water that has traveled a shorter distance.

The Distance Water Travels

We found no evidence to suggest that chlorinated water isn’t safe for immunocompromised people. Chlorine helps to protect a drinking water supply from microbiological contamination.

Is Chlorinated Water Safe For Immunocompromised People?

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