Lewis Lake
Stoddard County, Missouri6 acresView mapDirections
Missouri DNR publishes the water-quality measurements for Lewis Lake. Here is what has been measured.
- Limited data
Lewis Lake in Stoddard County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Phosphorus: 101 µg/L. Chlorophyll-a (algae): 149.8 µg/L. Surface area: 6 acres.
Lewis Lake is a 6-acre lake in Stoddard County, Missouri.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2021-07-07. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lewis Lake 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 Lewis Lake
These are the measurements Missouri DNR publishes for Lewis Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 101 µg/L. Chlorophyll-a 149.8 µg/L. TSI 75.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 101µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 150µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 75 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Lewis Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
6 acres
No bathymetric survey has been published for Lewis Lake, so its depth is not documented here.
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Fishing Lewis Lake
Reservoir Info (USACE NID)
Lewis Lake is a man-made reservoir impounded by the Richards Dam (completed 1995), built primarily for fish and wildlife pond on the TR-WILLIAMS CREEK; earth-type dam, 20 ft tall and 268 ft long.
- Surface area
- 6 ac
- Normal storage
- 61 ac-ft
- Max storage
- 108 ac-ft
- Drainage area
- 57.6 sq mi
- Hazard class
- Low
- Owner
- MIKE RICHARDS
All listed purposes: Fish and Wildlife Pond;Grade Stabilization;Recreation.
Source: USACE National Inventory of Dams, NID ID MO50660 · Operator website · Matched by proximity (0.05 km)
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Lewis Lake under Clean Water Act (NPDES) discharge permits. 2 facilities have a reported Clean Water Act violation in the past three years.
- Semo Residential And Recovery WwtfEssex · 1 mi away · NPDES MO0101176Recent violation
- Nestle Purina Petcare CompanyBloomfield · 3.3 mi away · NPDES MO0101788Recent violation
- Essex Power PlantEssex · 3.3 mi away · NPDES MO0123447
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 Stoddard County
Frequently asked questions about Lewis Lake
Where is Lewis Lake?
- Lewis Lake is a lake in Stoddard County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Lewis Lake?
- Lewis Lake in Stoddard County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Phosphorus: 101 µg/L. Chlorophyll-a (algae): 149.8 µg/L. Surface area: 6 acres.
Is Lewis Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
2 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Missouri Dept. of Natural Resources
MDNR2 samples · 2021
Analytical methods
- Nitrogen and Phosphorus, Total, Whole-water, Alkaline Persulfate Digest
- 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
Regulated discharger data from EPA ECHO (ICIS-NPDES)