The agreement with Murphy Exploration & Production, Pioneer Natural Resources USA, and SGH Enterprises requires the companies to continue to monitor the city’s public water supply monthly and provide treatment or an alternate drinking water source if water quality degrades to a point that presents a public health risk.

Under the terms of the deal, the firms will pay $320,000 to the City to reimburse costs related to water infrastructure and relocating water wells.

EPA regional administrator in Denver Jim Martin said the firms will continue to monitor water quality and will take all actions necessary to maintain an uninterrupted supply of safe water to residents.

The administrative order, issued under the Safe Drinking Water Act, replaces an emergency order issued by EPA in December 2010.

The companies had previously appealed this order in federal court, which referred the case to a mediation process, and the deal is a result of that process.