| Abbreviation | Definition |
|---|---|
| NRRD | Napa River Reclamation District |
| NRRE | Natural Resources and Rangeland Ecology |
| NRRE | Natural Resources Research and Extension |
| NRRP | Natural Resource Recruitment Program |
| NRRP | Natural Resources Research Program |
| NRRS | National Residential Radon Survey |
| NRRW | National Respository for Radioactive Waste |
| NRS | Natural Reclamation System |
| NRT | Natural Resources Trust of Easton |
| NRWS | Napa Recycling and Waste Services |
| NRWS | Napa Recycling Waste Services |
| NRWS | Northern Recycling and Waste Services |
| NS3270 | Standard Norge/Norsk Standard ( Modules included in OmradeLCA according to NS 3720; LCA - Low Carbon |
| NSCEE | National Supercomputing Center for Energy and the Environment |
| NSCEP | National Service Center for Environmental Publications |
| NSDWQ | National Standards for Drinking Water Quality |
| NSEP | Nature Society and Environmental Policy |
| NSPS | New Source Performance Standards |
| NSRA | Nebraska State Recycling Association |
| NSSFC | National Severe Storms Forecast Center |