Greenfield Lake is a productive, nutrient-rich eutrophic lake in New Hanover County, North Carolina. Water quality is graded D based on 3 sampling years through 2023. Compared to the 2 other monitored lakes in New Hanover County, Greenfield Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, North Carolina DNR, last sampled 2023-09-05. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 4.7 ft. Phosphorus level: 55 µg/L. Chlorophyll-a: 20.5 µg/L. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.7 ft | D |
| Phosphorus | 55 µg/L | C |
| Chlorophyll-a (Algae) | 20.5 µg/L | D |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Greenfield Lake
Location
County Ranking
Ranked #3 of 3 lakes in New Hanover County
Cleaner Lakes Within 30 Miles
Greenfield Lake holds Grade D. 2 nearby lakes hold higher grades.
- BCenter of Sutton LakeNew Hanover County · 7.2 mi · Two grade letters higher (D → B)
- BSutton LakeNew Hanover County · 8 mi · Two grade letters higher (D → B)
Nearby Lakes in New Hanover County
Explore Greenfield Lake across LakeGrade
More North Carolina Lake Rankings
Top 25 by overall water quality score
Top 25 by Secchi water clarity
Grade A/B + low algae filter
Panfish-rich, public access
Full state directory
Other Grade D Lakes in North Carolina
Eutrophic Lakes in North Carolina
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-09-05
Monitoring stations: 2