What is the water quality grade for Robin Hood Lakes?

Robin Hood Lakes in Warren County, Wisconsin received a water quality grade of D (Poor). Water clarity: 3 ft visibility. Phosphorus: 43 µg/L. Chlorophyll-a (algae): 15.7 µg/L. Surface area: 9 acres.

Is Robin Hood Lakes safe to swim in?

Swimming not recommended, poor water quality with high algae risk. Robin Hood Lakes has an overall water quality grade of D. Algae concentration (chlorophyll-a) is 15.7 µg/L. Always check local health department advisories before swimming.

Robin Hood Lakes

Warren County, WisconsinEutrophic

Robin Hood Lakes is a 9-acre productive, nutrient-rich eutrophic lake in Warren County, MO. Water quality is graded D based on 3 sampling years through 2021. Compared to the 15 other monitored lakes in Warren County, Robin Hood Lakes ranks #12 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2021-09-17. Grade methodology: LakeGrade methodology.

Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Very murky, less than 3 ft of visibility. Phosphorus level: 43 µg/L. Chlorophyll-a: 15.7 µg/L. Trophic State Index: 59.

Metric	Value	Grade
Water Clarity (Secchi Depth)	3 ft	F
Phosphorus	43 µg/L	C
Chlorophyll-a (Algae)	15.7 µg/L	C
Trophic State Index (TSI)	59	Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

Characteristic	Value
Surface Area	9 acres

Location

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County Ranking

Ranked #12 of 16 lakes in Warren County

Cleaner Lakes Within 30 Miles

Robin Hood Lakes holds Grade D. 3 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Warren County

Sherwood Lake Nr. Dam

More Wisconsin Lake Rankings

Cleanest lakes in Wisconsin

Top 25 by overall water quality score

Best swimming lakes in Wisconsin

Grade A/B + low algae filter

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Panfish-rich, public access

All Wisconsin lakes

Full state directory

Other Grade D Lakes in Wisconsin

Boathouse Lake

St. Louis city County · Clarity: 2.3 ft

Hunnewell Lake

Shelby County · Clarity: 3.2 ft

Long Branch Lk. Lake

Macon County · Clarity: 1.8 ft

Harrison County Lake Intake

Harrison County · Clarity: 1.7 ft

Table Rock L. Bl. Hwy. 173 Lake

Stone County · Clarity: 2.3 ft

Henry Sever Lake

Knox County · Clarity: 2.1 ft

Eutrophic Lakes in Wisconsin

Boathouse Lake Hunnewell Lake Long Branch Lk. Lake Creve Coeur Lake

Reservoir Info (USACE NID)

Robin Hood Lakes is a man-made reservoir impounded by the Lake Robin Hood Dam (completed 1970), built primarily for recreation on the TR-WOLF CREEK; earth-type dam, 34 ft tall.

Surface area: 9 ac
Normal storage: 78 ac-ft
Max storage: 164 ac-ft
Drainage area: 460 sq mi
Hazard class: Low
Owner: LK SHERWOOD ESTATES HOA

Source: USACE National Inventory of Dams, NID ID MO10447 · Operator website · Matched by proximity (0.05 km)

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2021-09-17

Monitoring stations: 1