The Daily Tar Heel
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The Daily Tar Heel

Orange Water and Sewer Authority resumed its normal process of disinfecting water using chlorine and ammonia Sunday.

During March, only chlorine was used to disinfect the water to comply with a state requirement.

In January 2002, Orange Water and Sewer Authority began using chloramines — the chlorine and ammonia combination — to disinfect drinking water while improving the taste, odor and overall quality.

The use has reduced levels of disinfection by-products that are left in the water. By-products that result from the chemical reaction between chlorine and organic materials that are naturally present in water from lakes can be harmful at high levels over a lifetime.

The City of Raleigh and the Town of Cary also use chloramines to disinfect drinking water.

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