Hillsborough’s reservoir expansion has earned the town and the engineering firm behind it state and national recognition for engineering excellence. The reservoir has a new spillway that increases the dam’s overflow capacity by providing a greater surface area in a small footprint.

The Town of Hillsborough treated about 543 million gallons of drinking water last year. Check out information about the treatment process and what’s in your water in the latest annual water quality report, available online and by request.

The 2022 report includes information on substances that the town monitors in your drinking water. It also includes information on unregulated and emerging contaminants, like PFAS, PFOS, GenX, and 1,4 dioxane. Also featured is information on:

Hillsborough’s water treatment system and its performance.
Where your drinking water comes from.
Water quality specifics from the federal Environmental Protection Agency.

New in the report this year is information on:

Utilities staff.
Water Treatment Plant tours.
Awards the town has received for its reservoir design and drinking water.
How to keep the public water supply safe by preventing backflow.
Water and sewer easements and your responsibilities for them.

The town routinely checks for more than 150 substances in your drinking water according to federal and state laws and goes beyond sampling requirements in some cases. For instance, the town tests samples at the Water Treatment Plant every two hours instead of the required four hours for turbidity, pH, total and free chlorine, chlorine residuals, monochloramines (ammonia), fluoride and tank levels.

The annual report is available in English and Spanish on the Water Treatment Plant page of the town website. For a copy by mail, call 919-296-9630.

2022 Water Quality Report Now Available

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