- Bac-Ground is an independent groundwater consultant specializing in groundwater modeling. Also perform data analyses and interpretation, peer review, and expert witness. Available for international environmental work. Fluent English/Spanish.
- Environmental Safety Services - Full service environmental and safety consulting firm.
- ETTL Engineers & Consultants, Inc. - Environmental & Geotechnical Consultants, Drilling Services, Analytical Services
- Morgan Environmental Consulting Associates - GIS and Remote Sensing Environmental Consultants
- Paul Hunt, CES, CEI, Environmental Scientist Home Page - CES, CEI, Phase I & II Site Evaluations, Houston-Galveston, Beaumont-Corpus Christi
- RBCA Services Page - Risk Based Corrective Actions specialists. Houston based firm providing assessment and remediation services in the Lone Star State.
- Tex-Tox Toxicology Consulting Services - Consulting in risk assessment, site asessment, hazard evaluation, health effects, toxicology issues.
- Waid and Associates - Environmental permitting, compliance, software development; specializing in air quality