Lake Luna
Cass County, Missouri17 acresView mapDirections
Missouri DNR publishes the water-quality measurements for Lake Luna. Here is what has been measured.
- Hypereutrophic
- Impaired · Algal growth
Lake Luna in Cass County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 1.2 ft visibility. Phosphorus: 192.9 µg/L. Chlorophyll-a (algae): 92.7 µg/L. Surface area: 17 acres.
Lake Luna is a 17-acre highly nutrient-loaded hypereutrophic lake in Cass County, Missouri. Overall water quality is improving over recent sampling years. Compared to the 3 other monitored lakes in Cass County, Lake Luna ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2021-08-04. Methodology: how these readings are compared.
Swimming conditions
Readings onlyAlgae risk
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Lake Luna is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth. Check local advisories before you swim.
Whether Lake Luna is safe to swim in today is a call for the Missouri Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Luna
These are the measurements Missouri DNR publishes for Lake Luna, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 1.2 ft of visibility. Phosphorus 192.9 µg/L. Chlorophyll-a 92.7 µg/L. TSI 77.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 193µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 92.7µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 77 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Lake Luna
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Lake Luna typically sits around 83°F at the surface in August. Summer average is about 82°F. Usually warmest in Jul (about 84°F) and coldest in Jun (about 78°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (78°F) to its warmest (84°F).
Typical surface water temperature by month, from 12 field readings (2019–2021) via the EPA Water Quality Portal. See the full Lake Luna water temperature breakdown →
Lake Details
Surface area
17 acres
No bathymetric survey has been published for Lake Luna, so its depth is not documented here.
Stays via Stay22
Stays near Lake Luna
Compare lakeside cabins, hotels, and vacation rentals near Lake Luna in Cass County, Missouri — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Lake Luna are listed below.
Top-rated places to stay near Lake Luna
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Fishing Lake Luna
Water quality readings over time
2 seasons of samples on record (2020–2021). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening2 years
Phosphorus
Improving-18 µg/L/yr2 years
Chlorophyll-a
Improving-19.8 µg/L/yr2 years
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
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit MO_7216.00 · Official waterbody report
Regulated Pollution Sources Nearby
11 EPA-permitted facilities operate within about 5 miles of Lake Luna under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 6 facilities have a reported Clean Water Act violation in the past three years.
- Harrisonville WwtpHarrisonville · 1.7 mi away · NPDES MO0028070MajorRecent violation
- Harrisonville Fireworks LpHarrisonville · 3.1 mi away · NPDES MO0123595Recent violation
- Grab And Go WwtpHarrisonville · 3.1 mi away · NPDES MO0117544Recent violation
- Slumber Inn WwtfHarrisonville · 3.1 mi away · NPDES MO0107301Recent violation
- Sapp Brothers Travel Center WwtpHarrisonville · 3.3 mi away · NPDES MO0138215Recent violation
- Harrisonville South WwtpHarrisonville · 3.8 mi away · NPDES MO0126179Recent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Cass County
Frequently asked questions about Lake Luna
Where is Lake Luna?
- Lake Luna is a lake in Cass County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Lake Luna?
- Lake Luna in Cass County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 1.2 ft visibility. Phosphorus: 192.9 µg/L. Chlorophyll-a (algae): 92.7 µg/L. Surface area: 17 acres.
Is Lake Luna safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Luna is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth. Check local advisories before you swim.
What is the water temperature of Lake Luna?
- Lake Luna typically sits around 83°F at the surface in August, from 12 EPA Water Quality Portal field readings (2019–2021). That is a typical value for the month, not a live reading.
Explore Lake Luna across LakeQuality
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Where this data comes from
40 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC40 samples · 2020–2021
Analytical methods
- Depth, Secchi disk in meters
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)