What is the water quality grade for Lake Twitty?

Lake Twitty in Union County, North Carolina received a water quality grade of D (Poor). Phosphorus: 80 µg/L. Chlorophyll-a (algae): 49 µg/L.

Is Lake Twitty safe to swim in?

Swimming not recommended, poor water quality with high algae risk. Lake Twitty has an overall water quality grade of D. Algae concentration (chlorophyll-a) is 49 µg/L. Always check local health department advisories before swimming.

Union County, North Carolina

Lake Twitty

Grade DPoor water quality

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Eutrophic

Lake Twitty is a productive, nutrient-rich eutrophic lake in Union County, North Carolina. Water quality is graded D based on 2 sampling years through 2021. Compared to the 2 other monitored lakes in Union County, Lake Twitty ranks #1 for water quality.

Source: EPA Water Quality Portal sampling records, North Carolina DNR, last sampled 2021-09-29. 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

No clarity data. Phosphorus level: 80 µg/L. Chlorophyll-a: 49 µg/L. Trophic State Index: 68.

Metric	Value	Grade
Water Clarity (Secchi Depth)	No data
Phosphorus	80 µg/L	D
Chlorophyll-a (Algae)	49 µg/L	F
Trophic State Index (TSI)	68	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Lake Twitty

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Fishing Lake Twitty

→ Lake Twitty fishing regulations (limits, seasons, special rules)

Location

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County Ranking

Ranked #1 of 3 lakes in Union County

Cleaner Lakes Within 30 Miles

Lake Twitty holds Grade D. 2 nearby lakes hold higher grades.

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Nearby Lakes in Union County

Explore Lake Twitty across LakeGrade

Lake Fishing Forecast

Species activity outlook by water temperature and season

Eutrophic Lakes

High nutrients, frequent algae, reduced clarity

The State of North Carolina's Lakes

North Carolina's cleanest and most-polluted lakes, ranked

More North Carolina Lake Rankings

Cleanest lakes in North Carolina

Top 25 by overall water quality score

Clearest lakes in North Carolina

Top 25 by Secchi water clarity

Best swimming lakes in North Carolina

Grade A/B + low algae filter

Family fishing lakes in North Carolina

Panfish-rich, public access

All North Carolina lakes

Full state directory

Other Grade D Lakes in North Carolina

Lake Concord

Cabarrus County · Poor

Coddle Creek Reservoir

Cabarrus County · Poor

Blewett Falls Lake

Anson County · Poor

High Rock Lake

Davidson County · Poor

Town Creek Lake

Rowan County · Poor

Lake Reese

Randolph County · Poor

Eutrophic Lakes in North Carolina

City Pond Lake Concord Lake Fisher Lake Tillery

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: 2021-09-29

Monitoring stations: 3

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