The NRCA continues to work to reduce total nitrogen delivery to the Neuse Estuary. The association currently has a permitted allocation of 1,184,165 lbs. of nitrogen at the estuary and in 2012 delivered 540,892 lbs, or an average estuary delivery concentration of 1.8 mg/L from the member facilities. Below you can review performance information from our member resouce recovery facilities.

In 2008, two of these plants were featured in an EPA technical paper, “Municipal Nutrient Removal Technologies Reference Document”, EPA 832-R-08-006, September 2008. The facilities featured in the case studies were North Cary WWTF for nitrogen and phosphorous removal technology and the Central Johnston County WWTF for its denitirifcation technology. Both facilities were cited for their cost effect methods of reducing phosphorous and nitrogen by upgrading existing facilities.

The nitrogen reductions achieved by NRCA members has required a significant investment in resource recovery facility improvements and upgrades. The investment through 2012 has exceeded $400,000,000.