Hazel Hill Lake by Dam is a 71-acre productive, nutrient-rich eutrophic lake in Johnson County, Missouri. Water quality is graded D based on 3 sampling years through 2024. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 4 other monitored lakes in Johnson County, Hazel Hill Lake by Dam ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-08-06. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 2 ft of visibility. Phosphorus level: 59.3 µg/L. Chlorophyll-a: 28 µg/L. Trophic State Index: 64.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | F |
| Phosphorus | 59.3 µg/L | C |
| Chlorophyll-a (Algae) | 28 µg/L | D |
| Trophic State Index (TSI) | 64 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 71 acres |
| Public Access | Yes |
Where to stay near Hazel Hill Lake by Dam
Compare lakeside cabins, hotels, and vacation rentals near Hazel Hill Lake by Dam in Johnson 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.
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Fishing Hazel Hill Lake by Dam
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.012 m/yr | 4 |
| Phosphorus | ↑ Improving | -2.41 µg/L/yr | 5 |
| Chlorophyll-a | ↑ Improving | -8.3 µg/L/yr | 5 |
Recreation & Access
Water Temperature
Hazel Hill Lake by Dam averages about 83°F at the surface in summer, usually warmest in Jul (about 86°F) and coldest in May (about 74°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 60 field readings (2010–2024) via the EPA Water Quality Portal. See the full Hazel Hill Lake by Dam water temperature breakdown →
Location
County Ranking
Ranked #4 of 5 lakes in Johnson County
Cleaner Lakes Within 30 Miles
Hazel Hill Lake by Dam holds Grade D. 2 nearby lakes hold higher grades.
- BRock Lake Village LakeJohnson County · 16.2 mi · Two grade letters higher (D → B)
- BLake ButeoJohnson County · 12.5 mi · Two grade letters higher (D → B)
Nearby Lakes in Johnson County
Explore Hazel Hill Lake by Dam across LakeGrade
More Missouri Lake Rankings
Other Grade D Lakes in Missouri
Eutrophic Lakes in Missouri
More records, surveys & data sources
Reservoir Info (USACE NID)
Hazel Hill Lake by Dam is a man-made reservoir impounded by the Hazel Hill Community Dam (completed 1989), built primarily for recreation on the TR-WALNUT CREEK; earth-type dam, 38 ft tall and 1,112 ft long.
- Surface area
- 71 ac
- Normal storage
- 544 ac-ft
- Max storage
- 544 ac-ft
- Drainage area
- 2.34 sq mi
- Hazard class
- Significant
- Owner
- MO DEPT OF CONSERVATION
Source: USACE National Inventory of Dams, NID ID MO20785 · Operator website · Matched by proximity (0.05 km)
EPA Impairment Status
Hazel Hill Lake by Dam 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_7387.00 · Official waterbody report · Matched by proximity (0.48 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
8 EPA-permitted facilities operate within about 5 miles of Hazel Hill Lake by Dam under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 6 facilities have a reported Clean Water Act violation in the past three years.
- Warrensburg West WwtpWarrensburg · 4.4 mi away · NPDES MO0055905MajorRecent violation
- Riverwood Ii Estates WwtfWarrensburg · 3.4 mi away · NPDES MO0113905Recent violation
- Four Seasons North Mhp WwtfWarrensburg · 4.2 mi away · NPDES MO0113603Recent violation
- Crabtree Country Subdivision WwtfWarrensburg · 4.4 mi away · NPDES MO0126462Recent violation
- Skyhaven Motel And Convenience StorewwtfWarrensburg · 4.7 mi away · NPDES MO0110108Recent violation
- Beverly Hills Mobile Home ParkWarrensburg · 4.8 mi away · NPDES MO0141038Recent violation
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.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2024-08-06
Monitoring stations: 2