ERG is an interdisciplinary consulting firm with 600 scientists, engineers, economists, information technology specialists, and communications professionals. Since 1984, ERG has provided technical and programmatic support for regulatory programs, voluntary initiatives, facilities management, and outreach on energy, water quality, air quality, climate science, and human health to federal, state, and local governments and NGOs. ERG has 20 offices across the country with more than 130,000 square feet of office space.

Years Reported & Verified

• 2023
• 2022
• 2021
• 2020
• 2019