| Abbreviation | Definition |
|---|---|
| HETI | Hydro Environmental Technologies Inc |
| HF | Halogen Free |
| HFC | HydroFluoroCarbon |
| HHPS | Hazardous Household Products Symbol |
| HHW | Hazardous Household Waste |
| HIEA | Hamilton Industrial Environmental Association |
| HIES | Hawaii International Environmental Services |
| HIPAR | Hot In Place Asphalt Recycling |
| HIPPO | Habitat destruction, Invasive non-native species, Population growth, Pollution, and Overharvesting |
| HKEPA | Hong Kong Environmental Protection Association |
| HME | Health Medical and Environmental |
| HMIRC | Hazardous Materials Information Review Commission |
| HMIS | Hazardous Materials Inventory System |
| HML | Harm the Marine Life |
| HMRAD | Hazardous Materials Response and Assessment Division |
| HMS | Headland Management System |
| HMS | Highly Migratory Species |
| HMSF | Hazardous Material Storage Facility |
| HMSP | Hazardous Materials Safety Permit |
| HMST | Hazard Mitigation Survey Team |