Environmental and Siting (Division 4): Regulatory Guides 4.1 - 4.20
This page lists the number, title, publication date, and revisions for each regulatory guide in Division 4, "Environmental and Siting," with references to draft guides and related documents (where applicable).
See also Draft Regulatory Guides for Public Comment.
See NRC Regulatory Guides for more general information.
Regulatory Guides are reviewed about every 10 years, although a guide may be reviewed more frequently if the staff believes an emerging issue affects the guide. The NRC began these reviews in 2010, and began posting the results of its reviews on this site in 2013. The review dates are hyperlinked to the review memorandum, which provide useful information about the status and any known issues with the associated regulatory guide.
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| Guide Number | Title | Revision Number | Issue Date | Additional Information |
|---|---|---|---|---|
| 4.1 | Radiological Environmental Monitoring for Nuclear Power Plants | 2 | 06/2009 | Reviewed in 2025 – Issues identified for future consideration Reviewed in 2014 – Issues identified for future consideration |
| 1 | 04/1975 | |||
| 0 | 01/1973 | |||
| 4.2 | Preparation of Environmental Reports for Nuclear Power Stations | 4 | 04/2026 | |
| 3 | 09/2018 | |||
| 2 | 07/1976 | |||
| 1 | 01/1975 | |||
| 0 | 03/1973 | |||
| 4.2S1 | Supplement 1 to Regulatory Guide 4.2, Preparation of Environmental Reports for Nuclear Power Plant License Renewal Applications | 2 | 07/2024 | |
| 1 | 06/2013 | |||
| 0 | 09/2000 | |||
| 4.3 | Measurements of Radionuclides in the Environment, Analysis of I-131 in Milk (Withdrawn--See 41 FR 53870, 12/09/1976) | W | 12/1976 | |
| 0 | 09/1973 | |||
| 4.4 | Reporting Procedure for Mathematical Models Selected To Predict Heated Effluent Dispersion in Natural Water Bodies (Withdrawn -- See 78 FR 20148, 04/03/2013) | W | 04/2013 | |
| 0 | 05/1974 | |||
| 4.5 | Measurements of Radionuclides in the Environment--Sampling and Analysis of Plutonium in Soil (Withdrawn -- See 74 FR 55074, October 26, 2009) | W | 10/2009 | |
| 0 | 05/1974 | |||
| 4.6 | Measurements of Radionuclides in the Environment-- Strontium-89 and Strontium-90 Analyses (Withdrawn -- See 74 FR 55074, October 26, 2009) | W | 10/2009 | |
| 0 | 05/1974 | |||
| 4.7 | General Site Suitability Criteria for Nuclear Power Stations | 4 | 02/2024 | |
| 3 | 03/2014 | |||
| 2 | 04/1998 | |||
| 1 | 11/1975 | |||
| 0 | 09/1974 | |||
| 4.8 | Environmental Technical Specifications for Nuclear Power Plants (Withdrawn -- See 74 FR 21017, 05/06/2009) | W | 05/2009 | |
| 0 | 12/1975 | |||
| 4.9 | Preparation of Environmental Reports for Commercial Uranium Enrichment Facilities | 1 | 10/1975 | Reviewed in 2016 – Issues identified for future consideration |
| 0 | 12/1974 | |||
| 4.10 | Irreversible and Irretrievable Commitment of Material Resources (Withdrawn--See 42 FR 59436, 11/17/1977) | W | 11/1977 | |
| 1 | 06/1976 | |||
| 0 | 06/1975 | |||
| 4.11 | Terrestrial Environmental Studies for Nuclear Power Stations | 2 | 03/2012 | Reviewed in 2017 – Issues identified for future consideration |
| 1 | 08/1977 | |||
| 0 | 07/1976 | |||
| 4.13 | Performance, Testing, and Procedural Specifications for Thermoluminescence Dosimetry: Environmental Applications | 2 | 06/2019 | |
| 1 | 07/1977 | |||
| 0 | 11/1976 | |||
| 4.14 | Radiological Effluent and Environmental Monitoring at Uranium Mills | 1 | 04/1980 | Reviewed in 2019 – Issues identified for future consideration |
| 0 | 06/1977 | |||
| 4.15 | Quality Assurance for Radiological Monitoring Programs (Inception through Normal Operations to License Termination) -- Effluent Streams and the Environment | 2 | 07/2007 | |
| I-2 | 03/2007 | |||
| 1 | 02/1979 | |||
| 0 | 12/1977 | |||
| 4.16 | Monitoring and Reporting Radioactivity in Releases of Radioactive Materials in Liquid and Gaseous Effluents from Nuclear Fuel Processing and Fabrication Plants and Uranium Hexafluoride Production Plants | 2 | 12/2010 | Reviewed in 2015 – No issues identified |
| 1 | 12/1985 | |||
| 0 | 03/1978 | |||
| 4.17 | Standard Format and Content of Site Characterization Plans for High-Level-Waste Geologic Repositories | 1 | 03/1987 | Reviewed in 2015 – No issues identified |
| 0 | 07/1982 | |||
| 4.18 | Standard Format and Content of Environmental Reports for Near-Surface Disposal of Radioactive Waste | 0 | 06/1983 | Periodic Review – October 2016 – Considerations Periodic Review – November 2011 – No Action |
| 4.19 | Guidance for Selecting Sites for Near-Surface Disposal of Low-Level Radioactive Waste | 0 | 08/1988 | Reviewed in 2016 – Issues identified for future consideration |
| 4.20 | Constraint on Releases of Airborne Radioactive Materials to the Environment for Licensees other than Power Reactors | 1 | 04/2012 | Reviewed in 2017 – Issues identified for future consideration |
| 0 | 12/1996 |
Page Last Reviewed/Updated Wednesday, May 06, 2026
Page Last Reviewed/Updated Wednesday, May 06, 2026