Fenceline Air Quality Monitoring
This article explores why fenceline monitoring networks are being installed, the available technologies that can be included, and key considerations for industrial facilities.
Understanding Whole Effluent Toxicity Testing in NPDES
Whole Effluent Toxicity (WET) testing measures the collective toxic effect that all pollutants in wastewater have on aquatic organisms
Ethylene Oxide Measurement Techniques Advancements
New updates on PFAS regulations were released in April 2025.
Approaches to Understanding Potential Impacts to Sediment Biota
To minimize the potential impacts on the natural environment from these activities, local and national regulatory entities have established requirements for defining the current baseline ecological conditions.
PFAS Strategic Roadmap Accomplishments and Future Outlook
We first reviewed the U.S. Environmental Protection Agency’s (EPA) PFAS Strategic Roadmap: 2021-2024 in March 2022, and have since posted periodic updates. With the recent conclusion of the 2021-2024 implementation period, we now reflect on accomplishments and speculate about potential future directions.
The NEPA Process Evolved in 2025. Is Your Project Ready for What’s Next?
With significant developments in all three branches of the federal government, 2025 ushered in fundamental changes to implementation of the National Environmental Policy Act (NEPA). Executive action reshaped agency procedures. The Supreme Court clarified the limits of judicial review. Congress continued to push statutory time limits.
EPA’s Repeal of the 2009 GHG Endangerment Finding: A Data Grounded Perspective on the Road Ahead
What EPA's repeal of the 2009 GHG Endangerment Finding could mean
Spheros Environmental climbs the ENR Top 200 Environmental Firms list!
Spheros Environmental has moved up four spots to rank #184 on Engineering News-Record’s (ENR) Top 200 Environmental Firms List for 2025!
Spheros Environmental acquires Ironwood Consulting
Spheros Environmental acquires Ironwood Consulting, strengthening biological and environmental permitting services across the United States.