Seetal Lake
Gasconade County, Missouri14 acresView mapDirections
Missouri DNR publishes the water-quality measurements for Seetal Lake. Here is what has been measured.
- Mesotrophic
- Public access
Seetal Lake in Gasconade County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 7.2 ft visibility. Phosphorus: 17 µg/L. Chlorophyll-a (algae): 5.9 µg/L. Surface area: 14 acres.
Seetal Lake is a 14-acre mesotrophic lake in Gasconade County, Missouri. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 2 other monitored lakes in Gasconade County, Seetal Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-11. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLow algae
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. Check local advisories before you swim.
Whether Seetal 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 Seetal Lake
These are the measurements Missouri DNR publishes for Seetal Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 7.2 ft. Phosphorus 17 µg/L. Chlorophyll-a 5.9 µg/L. TSI 47.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 7.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 17µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 5.9µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 47 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Seetal Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Seetal Lake typically sits around 79°F at the surface in September. Summer average is about 83°F. Usually warmest in Jul (about 85°F) and coldest in Apr (about 64°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (64°F) to its warmest (85°F).
Typical surface water temperature by month, from 15 field readings (2020–2024) via the EPA Water Quality Portal. See the full Seetal Lake water temperature breakdown →
Lake Details
Surface area
14 acres
Public access
Yes
Listed by Missouri DNR
No bathymetric survey has been published for Seetal Lake, so its depth is not documented here.
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Fishing Seetal Lake
Water Quality Trend: Improving
Based on 4 years of monitoring (2020–2024).
Water clarity
Stable4 years
Phosphorus
Improving-1.76 µg/L/yr4 years
Chlorophyll-a
Improving-1.3 µg/L/yr4 years
Reservoir Info (USACE NID)
Seetal Lake is a man-made reservoir impounded by the See Tal Lake Dam (completed 1971), built primarily for recreation on the TR-FRENE CREEK; earth-type dam, 51 ft tall and 600 ft long.
- Surface area
- 14 ac
- Normal storage
- 158 ac-ft
- Max storage
- 232 ac-ft
- Drainage area
- 0.27 sq mi
- Hazard class
- High
- Owner
- SEE TAL PROPERTY OWNERS
Source: USACE National Inventory of Dams, NID ID MO30668 · Operator website
Regulated Pollution Sources Nearby
6 EPA-permitted facilities operate within about 5 miles of Seetal Lake under Clean Water Act (NPDES) discharge permits. 5 facilities have a reported Clean Water Act violation in the past three years.
- Hermann WwtfHermann · 1.5 mi away · NPDES MO0106585Recent violation
- Mckittrick BpMckittrick · 1.7 mi away · NPDES MO0138134Recent violation
- Hermann Industrial Tract LagoonHermann · 2.1 mi away · NPDES MO0116009Recent violation
- Bruche And Nachas WwtfBerger · 3.9 mi away · NPDES MO0103691Recent violation
- Rhineland WwtfRhineland · 4.8 mi away · NPDES MO0117013Recent violation
- Spg Laser Light Technologies LlcHermann · 1.9 mi away · NPDES MONX00938
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 Gasconade County
Frequently asked questions about Seetal Lake
Where is Seetal Lake?
- Seetal Lake is a lake in Gasconade County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Seetal Lake?
- Seetal Lake in Gasconade County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 7.2 ft visibility. Phosphorus: 17 µg/L. Chlorophyll-a (algae): 5.9 µg/L. Surface area: 14 acres.
Is Seetal Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Seetal Lake?
- Seetal Lake typically sits around 79°F at the surface in September, from 15 EPA Water Quality Portal field readings (2020–2024). That is a typical value for the month, not a live reading.
Can I fish at Seetal Lake?
- Public access to Seetal Lake is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Missouri's fish and wildlife agency, so check its current regulations before you go.
Explore Seetal Lake across LakeQuality
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Other Lakes in Missouri
Mesotrophic Lakes in Missouri
Where this data comes from
45 measurements from 2 monitoring stations, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC42 samples · 2022–2024 - 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
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
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)