Spheros Environmental ranks No. 162 on Engineering News-Record’s (ENR) 2026 Top 200 Environmental Firms list, rising 22 spots from No. 184 in 2025. The milestone comes as we celebrate five years of bringing environmental science and practical judgment to clients’ most challenging questions.
Under the Clean Air Act, an area designated for nonattainment for an NAAQS must develop and submit a State Implementation Plan (SIP). This document serves as a comprehensive, enforceable roadmap demonstrating how the area will come into compliance. For the 2024 PM2.5 standard, nonattainment area SIPs will be due within 18 months of the effective designation date, which was expected in February 2026.
As industries and governments face increasing pressure to reduce emissions and meet ambitious climate goals, carbon capture and sequestration (CCS) has emerged as a promising, if complex, solution. At its core, CCS treats carbon dioxide (CO2) emissions as a waste stream by capturing CO2 and permanently storing it deep underground.
What EPA's repeal of the 2009 GHG Endangerment Finding could mean
Every day, decisions that affect the air you breathe are guided by computer models that predict pollution levels. But what happens when those models don't match reality? That's exactly what our team set out to study in Houston, Texas, where pollution comes from a complex mix of traffic, shipping, and industrial sources.
Most people think of fenceline monitoring as a robust answer to regulatory requirements. And while technically that may be true, it also can be a lot more than that. Fenceline monitoring may have begun as a method to measure and prove compliance, but beyond that, it’s become a valuable, real-time accountability system that connects facilities to the communities around them, regulators to the data they need to do their jobs, and project teams to real-time, site-specific conditions.
California's AB 2851 is set to reshape how metal shredding facilities monitor air quality at their fencelines. In this Spheros webinar, senior air quality scientists Josette Marrero, PhD and Ryan Moffet, PhD break down what the new law means, how regional air districts are implementing it, and how facilities can get ahead of the requirements.
PFAS regulations continue to shift across drinking water, wastewater, cleanup liability, incineration, and air emissions, leaving many facilities with a familiar challenge: how to prepare for requirements that are still evolving.
What EPA's repeal of the 2009 GHG Endangerment Finding could mean
PFAS are persistent synthetic chemicals that accumulate in soil, water, and in tissues of organisms. Scientists are working to better understand their movement, persistence, and risks to ecological health.
