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LakeQuality
F

Lake Luna

Cass County, WisconsinHypereutrophic

Lake Luna is a 17-acre highly nutrient-loaded hypereutrophic lake in Cass County, MO. Water quality is graded F based on 3 sampling years through 2021. Compared to the 4 other monitored lakes in Cass County, Lake Luna ranks #4 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2021-08-04. Grade methodology: LakeGrade methodology.

Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 1.2 ft of visibility. Phosphorus level: 192.9 µg/L. Chlorophyll-a: 92.7 µg/L. Trophic State Index: 77.

MetricValueGrade
Water Clarity (Secchi Depth)1.2 ftF
Phosphorus192.9 µg/LF
Chlorophyll-a (Algae)92.7 µg/LF
Trophic State Index (TSI)77Hypereutrophic

Very high nutrients, dense algae, poor clarity

Lake Details

CharacteristicValue
Surface Area17 acres

Location

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County Ranking

Ranked #4 of 5 lakes in Cass County

Cleaner Lakes Within 30 Miles

Lake Luna holds Grade F. 4 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Cass County

F
Raintree Lake
Cass County
F
Harrisonville City Lake
Cass County
F
Harrisonville Lake
Cass County
F
North Lake
Cass County

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Other Grade F Lakes in Wisconsin

Creve Coeur Lake

St. Louis County · Clarity: 1.6 ft

Lake of the Woods-Kc

Jackson County · Clarity: 2 ft

Lake St. Louis by Dam

St. Charles County · Clarity: 2.3 ft

Hemitite Lake

St. Francois County · Clarity: 1.1 ft

Blind Pony Lake

Saline County · Clarity: 2.3 ft

Stockton Lake Upstream of Hwy 123 Bridge

Polk County · Clarity: 1.2 ft

Hypereutrophic Lakes in Wisconsin

Hemitite LakeStockton Lake Upstream of Hwy 123 BridgeDairy Farm Lake No.1Lake St. Louis Nr. Hwy 40

Reservoir Info (USACE NID)

Lake Luna is a man-made reservoir impounded by the Lake Luna Dam (completed 1920), built primarily for recreation on the TOWN CREEK; earth-type dam, 17 ft tall.

Surface area
17 ac
Normal storage
120 ac-ft
Max storage
155 ac-ft
Drainage area
1,310 sq mi
Hazard class
High
Owner
CITY OF HARRISONVILLE

All listed purposes: Recreation;Water Supply.

Source: USACE National Inventory of Dams, NID ID MO20076 · Operator website

EPA Impairment Status

Lake Luna is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

Algal growth

Source: EPA ATTAINS assessment unit MO_7216.00 · Official waterbody report

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Most recent sample: 2021-08-04

Monitoring stations: 1