The Town of Hillsborough treated 408.07 million gallons of wastewater between July 1, 2024, and June 30, 2025. Check out information about the wastewater collection system and treatment process in the annual wastewater quality report.

The annual report includes information on:

• The performance of the town’s wastewater collection and treatment systems.
• How to protect homes and the environment by properly disposing of fats, oils and grease and items like sanitary wipes and tampons.  

For a printed copy or a Spanish translation, contact the Utilities Department by email or call 919-296-9630.

More Information

The Wastewater Treatment Plant has successfully reduced the total nitrogen discharged into the Eno River by about 85% since 2004. This helps ensure clean, safe water in the Eno, which is our source for drinking water.  

See the town’s video Hillsborough Wastewater Treatment: A Success Story about why the 2014 upgrade to the treatment plant was needed and how it improved water quality in the river. The town is still making annual debt payments for the $19 million upgrade.  

You can help ensure the safety of our waterways by not flushing wipes, tampons, plastic tampon inserts and other materials ― even those labeled flushable. Flushing these items can block pipes and result in sewer overflows.  

See the About Wastewater page on the town website for more information about our wastewater treatment process, pump stations, sewer maintenance and infrastructure protection.