California Conditional Letter of Map Revision
Trihydro provided hydraulic modeling and floodplain permitting services for a remediation project to increase wetland area…
Permitting and Compliance
Supporting environmental permitting and compliance across federal, state, and local regulations through coordinated strategy, agency engagement, and ongoing compliance management.
Projects
Class VI Permitting, CARB Certification, and Monitoring Program
As part of a multi-organization team, Trihydro supported permitting efforts and led baseline environmental monitoring for a…
Cal-Wood Wildfire Rehabilitation
When the Cal-Wood Fire left more than 10,000 acres of burned land in its wake, Trihydro supported Boulder County Parks and…
Remedy Evaluation and Implementation for Brownfield Funding
The Town of Dubois contracted Trihydro to provide technical assistance for remedy evaluation and implementation for…
Environmental Due Diligence
Trihydro partnered with a Fortune 500 waste management firm and local environmental health & safety managers to rapidly…
Delve Articles
How Drought Affects Utah UPDES Compliance and Permit Readiness
Utah’s 2026 statewide drought emergency has intensified conversations about water availability, water stewardship, and…
Produced Water Reuse Policy by State
Driven by growing water scarcity, produced water reuse policy is evolving quickly. No two states are taking the same path.…
NESHAP Subpart HH: EPA Method 21 Monitoring Requirements for Glycol Dehydrators
Many upstream and midstream natural gas facilities rely on optical gas imaging (OGI) as a cornerstone of their leak…
Moving Environmental Projects Through the Regulatory Review Process
Environmental and remediation projects often face a challenge that has little to do with the quality of the work itself. As…
2026 Federal PFAS Actions: What Facilities Should Watch
The U.S. Environmental Protection Agency (EPA), Department of Defense (DoD), and other federal agencies are advancing per-…
How Oklahoma HB 4338 Is Changing Produced Water Resource Recovery
Recently, Oklahoma enacted House Bill 4338 (HB 4338), expanding the Oklahoma Brine Development Act to include produced…
RCRA Permit Renewals for Hazardous Waste Facilities Explained
Resource Conservation and Recovery Act (RCRA) permits for hazardous waste treatment, storage, and disposal facilities…
EPA’s UCMR 6 Expands Monitoring for 30 Emerging Drinking Water Contaminants
The U.S. Environmental Protection Agency (EPA) has released its proposed Sixth Unregulated Contaminant Monitoring Rule (UCMR…
EPA Acts to Protect Workers from 1,2-Dichloroethane (1,2-DCA)
The U.S. Environmental Protection Agency (EPA) recently announced plans to regulate 15 industrial and commercial uses of…
Colorado Regulation 30 PTAC Formaldehyde Considerations
Colorado Department of Public Health & Environment (CDPHE) Regulation 30 (5 CCR 1001-35) is the Colorado Air Quality…
Colorado General Permit 12 (GP12) for Oil & Gas Permitting Explained
Colorado’s oil and gas general permits for well production facilities have changed significantly with the release of…
The New EPA Alters PFAS Drinking Water Compliance Rules
The U.S. Environmental Protection Agency (EPA) recently announced two proposed rules that would preserve federal drinking…
Trainings
Webinar: Real-World Lessons on NESHAP Subpart BBBBBB (6B) and NSPS Subpart XXa
In May 2024, EPA finalized NESHAP Subparts R and BBBBBB (6B), as well as NSPS Subpart XXa, introducing more stringent air…
Training: Corporate Sustainability Planning and Assessment
Trihydro’s Corporate Sustainability Planning and Assessment training is designed for companies interested in how…