Hazel Hill Lake by Dam
Johnson County, Missouri71 acresView mapDirections
This is the name Missouri DNR records for this water. It can describe one sampling location rather than the water as a whole.
Missouri DNR publishes the water-quality measurements for Hazel Hill Lake by Dam. Here is what has been measured.
- Eutrophic
- Impaired · Algal growth
- 39 ft max depth
- Public access
Hazel Hill Lake by Dam in Johnson County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 2 ft visibility. Phosphorus: 59.3 µg/L. Chlorophyll-a (algae): 28 µg/L. Surface area: 71 acres.
Hazel Hill Lake by Dam is a 71-acre productive, nutrient-rich eutrophic lake in Johnson County, Missouri with an estimated average depth of about 39 feet. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 3 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. Methodology: how these readings are compared.
Swimming conditions
Readings onlyAlgae risk
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. Hazel Hill Lake by Dam is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth. Check local advisories before you swim.
Whether Hazel Hill Lake by Dam 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 Hazel Hill Lake by Dam
These are the measurements Missouri DNR publishes for Hazel Hill Lake by Dam, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2 ft of visibility. Phosphorus 59.3 µg/L. Chlorophyll-a 28 µg/L. TSI 64.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 59.3µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 28µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 64 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Hazel Hill Lake by Dam
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Hazel Hill Lake by Dam typically sits around 83°F at the surface in August. Summer average is about 83°F. Usually warmest in Jul (about 86°F) and coldest in May (about 74°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (74°F) to its warmest (86°F).
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 →
Lake Details
Max depth
~39 ft est.
Surface area
71 acres
Public access
Yes
Listed by Missouri DNR
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Missouri has not published bathymetry for Hazel Hill Lake by Dam.
Lake Size & Watershed
Watershed (drainage) area
2 sq mi
HydroLAKES / HydroSHEDS
Shoreline
1.7 mi
HydroLAKES / HydroSHEDS
Elevation
755 ft
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.
Stays via Stay22
Stays 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Hazel Hill Lake by Dam are listed below.
Top-rated places to stay near Hazel Hill Lake by Dam
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Missouri’s top lakes →
Follow Hazel Hill Lake by Dam’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Hazel Hill Lake by Dam
Water Quality Trend: Improving
Based on 5 years of monitoring (2020–2024).
Water clarity
Stable4 years
Phosphorus
Improving-2.41 µg/L/yr5 years
Chlorophyll-a
Improving-8.3 µg/L/yr5 years
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
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit MO_7387.00 · Official waterbody report
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.
Nearby Lakes in Johnson County
Frequently asked questions about Hazel Hill Lake by Dam
Where is Hazel Hill Lake by Dam?
- Hazel Hill Lake by Dam is in Johnson County, Missouri. This is the name Missouri DNR records for this water. It can describe one sampling location rather than the water as a whole. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Hazel Hill Lake by Dam?
- Hazel Hill Lake by Dam in Johnson County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 2 ft visibility. Phosphorus: 59.3 µg/L. Chlorophyll-a (algae): 28 µg/L. Surface area: 71 acres.
Is Hazel Hill Lake by Dam safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Hazel Hill Lake by Dam is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth. Check local advisories before you swim.
What is the water temperature of Hazel Hill Lake by Dam?
- Hazel Hill Lake by Dam typically sits around 83°F at the surface in August, from 60 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
How deep is Hazel Hill Lake by Dam?
- No published bathymetric survey covers Hazel Hill Lake by Dam, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 39 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 71 acres.
Can I fish at Hazel Hill Lake by Dam?
- Public access to Hazel Hill Lake by Dam 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 Hazel Hill Lake by Dam across LakeQuality
More lakes in Missouri
Other Lakes in Missouri
Eutrophic Lakes in Missouri
Where this data comes from
85 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
UMC84 samples · 2020–2024 - Missouri Dept. of Natural Resources
MDNR1 sample · 2023
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
- Nitrogen and Phosphorus, Total, Whole-water, Alkaline Persulfate Digest
Monitoring station identifiers (2)
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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)