ENR July 30, 2012 | ENR: Engineering News Record

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ENR July 30, 2012

Nitrogen Diet Reduces Arizona County's Drinking Water Threat
By Pam Hunter, with Scott Blair
In an effort to bring nitrogen levels in its wastewater down following an Arizona DEQ ruling, Pima County's Regional Wastewater Reclamation Dept. embarked on a $720-million plan to improve the quality of its effluent.

DAF Placement Saves on Capital Costs

Archeological Discoveries Coexist With Construction Crews at Pima County Project

Cover image: ENR Art Department

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