Tombstone, Arizona, USA
Tombstone, Arizona, USADrinking Water System Improvements in Tombstone, Arizona
Project Status: Completed

General Information
Sector
Water
Sponsor
City of Tombstone
Benefited population
1,380
Certification date
June 16,2016
Financing
Project cost
US 0.75M
NADBank Funds
US 0.5M - NADBank Grant: CAP
Related documents
Background
The purpose of the Project is to improve drinking water quality by blending Well No. 1 water with surface (spring) water to bring arsenic concentrations within the established maximum contaminant level (MCL) of 10 micrograms per liter (µg/l), which will contribute to the reduction of health risks associated with high levels of arsenic.
Description
The project consists of improvements to the drinking water supply and to the water storage and distribution infrastructure, including replacement of the roof structure and liner at the surface water reservoir, pipeline replacement and the installation of control valves monitored by a new Supervisory Control and Data Acquisition (SCADA) system in the City of Tombstone, Arizona (the “Project”).
Benefits
The Project is expected to generate environmental and human health benefits related to the following Project outcomes:
Provide improved drinking water quality for 718 residential service connections.
Full compliance with regulatory standards for arsenic concentrations, which will be reduced to < 10 µg/L.