Izaak Walton Lake
Vernon County, Missouri10 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.
- Public access
- Limited data
Izaak Walton Lake in Vernon County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.5 ft visibility. Phosphorus: 280 µg/L. Chlorophyll-a (algae): 123.1 µg/L. Surface area: 10 acres.
- Clarity
- 1.5 ft
- Area
- 10 acres
- Phosphorus
- 280 µg/L
- Chlorophyll-a
- 123.1 µg/L
- Public access
- Yes
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Watch Izaak Walton Lake’s letter
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Why Izaak Walton 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 Izaak Walton Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
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.
Izaak Walton Lake is a 10-acre lake in Vernon County, Missouri. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2020-08-21. Grade methodology: LakeQuality methodology.
What Izaak Walton Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Izaak Walton Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 1.5 ft of visibility. Phosphorus 280 µg/L. Chlorophyll-a 123.1 µg/L. TSI 78.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.5 ft | Not graded |
| Phosphorus | 280 µg/L | Not graded |
| Chlorophyll-a (Algae) | 123.1 µg/L | Not graded |
| Trophic State Index (TSI) | 78 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 10 acres |
| Public Access | Yes |
No bathymetric survey has been published for Izaak Walton Lake, so its depth is not documented here.
Recreation & Access
- Izaac Walton Lake (Nevada)Public
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Izaak Walton Lake
Reservoir Info (USACE NID)
Izaak Walton Lake is a man-made reservoir impounded by the Izaak Walton Lake Dam (completed 1926), built primarily for recreation on the TR TO WHITE BRANCH; earth-type dam, 25 ft tall.
- Surface area
- 10 ac
- Normal storage
- 67 ac-ft
- Max storage
- 134 ac-ft
- Drainage area
- 1,000 sq mi
- Hazard class
- High
- Owner
- CITY OF NEVADA
Source: USACE National Inventory of Dams, NID ID MO20048 · Operator website
Regulated Pollution Sources Nearby
6 EPA-permitted facilities operate within about 5 miles of Izaak Walton Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 2 facilities have a reported Clean Water Act violation in the past three years.
- Nevada WwtpNevada · 1.7 mi away · NPDES MO0089109MajorRecent violation
- Camp Clark Training Site WwtfNevada · 4.7 mi away · NPDES MO0037052Recent violation
- Nf Protein Nevada PlantNevada · 1.5 mi away · NPDES MO0137766
- Vernon County Meats LlcNevada · 1.8 mi away · NPDES MONX00946
- 3M Company (Nevada, Mo)Nevada · 2.4 mi away · NPDES MO0111082
- Vernon County Sewer Dist-Rolling MeadowsNevada · 3 mi away · NPDES MO0042153
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 Izaak Walton Lake
Izaak Walton Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Vernon County
Frequently asked questions about Izaak Walton Lake
Where is Izaak Walton Lake?
- Izaak Walton Lake is a lake in Vernon 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 Izaak Walton Lake?
- Izaak Walton Lake in Vernon County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.5 ft visibility. Phosphorus: 280 µg/L. Chlorophyll-a (algae): 123.1 µg/L. Surface area: 10 acres.
Is Izaak Walton Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Izaak Walton Lake?
- Izaak Walton Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Izaac Walton Lake (Nevada). Public access is listed as yes.
Explore Izaak Walton Lake across LakeQuality
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Where this data comes from
3 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Missouri Dept. of Natural Resources
MDNR3 samples · 2020
Analytical methods
- Depth, Secchi disk in meters
- 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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Named boat-access points from the USGS National Boat Ramps inventory