Lewis Lake
Stoddard County, Missouri6 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Impaired · Mercury
- Limited data
Lewis Lake in Stoddard County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 101 µg/L. Chlorophyll-a (algae): 149.8 µg/L. Surface area: 6 acres.
- Area
- 6 acres
- Phosphorus
- 101 µg/L
- Chlorophyll-a
- 149.8 µg/L
Stays via Stay22
Stays near Lewis Lake
Compare lakeside cabins, hotels, and vacation rentals near Lewis Lake in Stoddard 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.
Top-rated places to stay near Lewis Lake
Prices for Sep 11–13, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Missouri’s top lakes →
Watch Lewis Lake’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Why Lewis Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Lewis Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Missouri DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
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. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Lewis Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Water quality measurements for Lewis Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 101 µg/L. Chlorophyll-a 149.8 µg/L. TSI 75.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 101 µg/L | Not graded |
| Chlorophyll-a (Algae) | 149.8 µg/L | Not graded |
| Trophic State Index (TSI) | 75 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 6 acres |
No bathymetric survey has been published for Lewis Lake, so its depth is not documented here.
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)
EPA Impairment Status
Lewis Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MO_7346.00 · Official waterbody report
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.
Graded lakes near Lewis Lake
Lewis Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Stoddard County
Frequently asked questions about Lewis Lake
Where is Lewis Lake?
- Lewis Lake is a lake in Stoddard County, Missouri. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Lewis Lake?
- Lewis Lake in Stoddard County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 101 µg/L. Chlorophyll-a (algae): 149.8 µg/L. Surface area: 6 acres.
Is Lewis Lake safe to swim in?
- The letter is not a swimming clearance. Lewis Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Explore Lewis Lake across LakeQuality
More Missouri Lake Rankings
Other Lakes in Missouri
Hypereutrophic Lakes in Missouri
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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)