What is the cleanest lake in Wake County, North Carolina?

Lake Johnson in Wake County is the highest-rated lake in Wake County, North Carolina with an EPA water quality grade of D and 3 feet of water clarity.

How are these rankings calculated?

Lakes are graded A through F on nutrients and algae — total phosphorus, nitrogen, chlorophyll-a, and turbidity — against EPA National Lakes Assessment 2022 condition classes for that lake’s ecoregion. Water clarity (Secchi depth) is measured and shown; it is not the letter. Lakes without enough recent samples are UNRATED, not given an F. Source data comes from the EPA Water Quality Portal.

Cleanest Lakes in Wake County, North Carolina

Lake Johnson in Wake County leads the rankings with a water quality grade of D and 3 ft of clarity. Below are the top 15 cleanest monitored lakes in Wake County, North Carolina, ranked by EPA water quality score.

Ranked List

#	Lake	County	Grade	Clarity	Phosphorus	Algae
1	Lake Johnson	Wake	D	3 ft	40 µg/L	23 µg/L
2	Lake Raleigh	Wake	D	2.5 ft	45 µg/L	29.5 µg/L
3	Harris Lake	Wake	F	2.5 ft	90 µg/L	43 µg/L
4	Falls of the Neuse Reservoir	Wake	F	2.2 ft	40 µg/L	36 µg/L
5	Lake Wheeler	Wake	F	2.8 ft	50 µg/L	35 µg/L
6	Lake Crabtree	Wake	F	1.1 ft	85 µg/L	35 µg/L
7	Sycamore Lake	Wake	F	2 ft	50 µg/L	32 µg/L
8	Apex Reservoir	Wake	F	1.8 ft	50 µg/L	35.5 µg/L
9	Big Lake	Wake	F	2.3 ft	50 µg/L	37 µg/L
10	Bass Lake	Wake	F	2.5 ft	50 µg/L	31 µg/L
11	Beaverdam Lake	Wake	F	2.5 ft	45 µg/L	33 µg/L
12	Lake Benson	Wake	F	2.3 ft	50 µg/L	38 µg/L
13	Reedy Creek Lake	Wake	F	2 ft	65 µg/L	32.5 µg/L
14	Shearon Harris Reservoir	Wake	NR	-	-	-
15	Brier Creek Reservoir	Wake	NR	-	-	-

Ranked List

More Answers for Wake County, North Carolina