Page 53 - 2021 Sustainability Report

ENVIRONMENTAL STEWARDSHIP

Water Management

We use water for production, maintenance activities, permits under the National Pollutant Discharge Elimination
environmental controls and reclamation. We recognize that System (NPDES) that contain site-specific limits designed to
water availability is critical to the future of our maintain the health of the receiving water body and the
communities and our operations. We also recognize that aquatic species that call it home. We use treatment
our diversion and discharge of water into the environment systems designed to ensure that permit compliance is
impacts our communities and the ecosystem. We are maintained and conduct regular monitoring and reporting
committed to responsible and efficient water management to ensure compliance.
and continuously seek opportunities to use renewable and
recycled sources. As with our GHG emissions strategy, we In addition, stormwater discharges associated with
invest in new processes and technologies following industrial activity are regulated pursuant to the CWA.
appropriate testing. These regulations require that the site operate under either
a general permit applicable to all similar facilities or a site-
In 1972, the U.S. Congress enacted the Federal Water specific permit depending upon many factors.
Pollution Control Act, now known as the Clean Water Act
(CWA). This law, as amended, established the basic The storm-water permitting system is designed to minimize
framework for regulating water pollution in the United and reduce pollution in the runoff from industrial facilities.
States. Compliance with water quality requirements under Sites must maintain a Storm Water Pollution Prevention
the CWA is a critical aspect of Martin Marietta’s Plan, implement Best Management Practices, and
environmental stewardship. undertake certain sampling and reporting.

While we make significant efforts to reuse and recycle By the end of 2021, we operated more than 350 aggregate
water in our processes, we do have discharges at or from a facilities across the United States and recorded a total of only
number of our locations. In those cases, we have obtained five CWA-related violations, almost all of which were minor.

An expansive lake created at a reclaimed
site in Georgetown, South Carolina

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