The following sections define and describe classes of spatial features that are important to public health and the natural environment. Some of them can be explored with our Advanced Mapviewer, others will be added in the future if we can secure additional funding for the further development of this website.
From North Carolina Department of Natural Resources, Division of Water Quality
| Class | Description |
| B | Primary Recreation, Fresh Water |
| C | Aquatic Life, Secondary Recreation, Fresh Water |
| CA | Critical Area |
| FWS | Future Water Supply Waters |
| HQW | High Quality Waters |
| N/A | Not Applicable/Out of State |
| NSW | Nutrient Sensitive Waters |
| ORW | Outstanding Resource Waters |
| SA | Market Shellfishing, Salt Water |
| SB | Primary Recreation, Salt Water |
| SC | Aquatic Life, Secondary Recreation, Salt |
| Sw | Swamp Waters |
| Tr | Trout Waters |
| WS-I | Water Supply I -- Natural |
| WS-II | Water Supply II -- Undeveloped |
| WS-III | Water Supply III -- Moderately Developed |
| WS-IV | Water Supply IV -- Highly Developed |
| WS-V | Water Supply V -- Upstream |
No land-disturbing activity during periods of construction or improvement to land shall be permitted in proximity to a lake or natural watercourse unless a buffer zone is provided along the margin of the watercourse of sufficient width to confine visible siltation within the twenty-five percent (25%) of the buffer zone nearest the land-disturbing activity. Waters that have been classified as trout waters by the Environmental Management Commission shall have an undisturbed buffer zone 25 feet wide or of sufficient width to confine visible siltation within the twenty-five percent (25%) of the buffer zone nearest the land-disturbing activity, whichever is greater.See the "Red Book" to understand the rules and regulations for these streams.