Crystal-Morgan Lake
Morgan County, MissouriView mapDirections
Missouri DNR publishes the water-quality measurements for Crystal-Morgan Lake. Here is what has been measured.
- Mesotrophic
Crystal-Morgan Lake in Morgan County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 6.2 ft visibility. Phosphorus: 15.5 µg/L. Chlorophyll-a (algae): 3.1 µg/L.
Crystal-Morgan Lake is a mesotrophic lake in Morgan County, Missouri. Overall water quality is improving over recent sampling years. Compared to the 2 other monitored lakes in Morgan County, Crystal-Morgan Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-08-20. 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 Crystal-Morgan 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 Crystal-Morgan Lake
These are the measurements Missouri DNR publishes for Crystal-Morgan Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 6.2 ft. Phosphorus 15.5 µg/L. Chlorophyll-a 3.1 µg/L. TSI 45.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 6.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 15.5µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 3.1µg/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. | 45 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Crystal-Morgan Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Crystal-Morgan Lake typically sits around 75°F at the surface in September. Summer average is about 79°F. Usually warmest in Jul (about 81°F) and coldest in May (about 75°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (75°F) to its warmest (81°F).
Typical surface water temperature by month, from 16 field readings (2022–2024) via the EPA Water Quality Portal. See the full Crystal-Morgan Lake water temperature breakdown →
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Stays near Crystal-Morgan Lake
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Fishing Crystal-Morgan Lake
Water quality readings over time
3 seasons of samples on record (2022–2024). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving3 years
Phosphorus
Improving-1.5 µg/L/yr3 years
Chlorophyll-a
Improving-0.5 µg/L/yr3 years
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Crystal-Morgan Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Stover Southwest WwtpStover · 4.2 mi away · NPDES MO0047058Recent violation
- Ozark Recycling Center LlcVersailles · 4 mi away · NPDES MONX00596
- Stover Northwest WwtfStover · 4.3 mi away · NPDES MO0047040
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 Morgan County
Frequently asked questions about Crystal-Morgan Lake
Where is Crystal-Morgan Lake?
- Crystal-Morgan Lake is a lake in Morgan County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Crystal-Morgan Lake?
- Crystal-Morgan Lake in Morgan County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 6.2 ft visibility. Phosphorus: 15.5 µg/L. Chlorophyll-a (algae): 3.1 µg/L.
Is Crystal-Morgan 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 Crystal-Morgan Lake?
- Crystal-Morgan Lake typically sits around 75°F at the surface in September, from 16 EPA Water Quality Portal field readings (2022–2024). That is a typical value for the month, not a live reading.
Explore Crystal-Morgan Lake across LakeQuality
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Mesotrophic Lakes in Missouri
Where this data comes from
46 measurements from 1 monitoring station, 2022–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC46 samples · 2022–2024
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)