Adair County, Missouri · Water Quality Report Card
Hazel Creek Lake
Hazel Creek Lake in Adair County, Missouri has a water quality grade of C (Fair). Water clarity: 2.8 ft visibility. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 19 µg/L.
- Clarity
- 2.8 ft
- Mean depth
- ~24 ft est.
- Type
- Eutrophic
- Trend
- ↑ Improving
Hazel Creek Lake is a productive, nutrient-rich eutrophic lake in Adair County, Missouri with an estimated average depth of about 24 feet. Water quality is graded C based on 2 sampling years through 2020. Overall water quality is improving over recent sampling years. Compared to the 4 other monitored lakes in Adair County, Hazel Creek Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2020-09-16. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swim with caution, moderate algae may be present
Water Quality Grade: C (Fair)
Very murky, less than 2.8 ft of visibility. Phosphorus level: 22 µg/L. Chlorophyll-a: 19 µg/L. Trophic State Index: 57.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.8 ft | |
| Phosphorus | 22 µg/L | Good |
| Chlorophyll-a (Algae) | 19 µg/L | Fair |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~24 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Missouri has not published bathymetry for Hazel Creek Lake.
Where to stay near Hazel Creek Lake
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Fishing Hazel Creek Lake
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.078 m/yr | 5 |
| Phosphorus | → Stable | +0.09 µg/L/yr | 5 |
| Chlorophyll-a | ↑ Improving | -2.78 µg/L/yr | 5 |
Location
County Ranking
Ranked #5 of 5 lakes in Adair County
Cleaner Lakes Within 30 Miles
Hazel Creek Lake holds Grade C. 4 nearby lakes hold higher grades.
Nearby Lakes in Adair County
Explore Hazel Creek Lake across LakeGrade
More Missouri Lake Rankings
Other Grade C Lakes in Missouri
Eutrophic Lakes in Missouri
More records, surveys & data sources
EPA Impairment Status
Hazel Creek 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_7152.00 · Official waterbody report
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Where this data comes from
24 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC24 samples · 2020
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)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2020-09-16
Monitoring stations: 1