Mill Meadow Reservoir
Wayne County, UtahView mapDirections
Utah DWQ publishes the water-quality measurements for Mill Meadow Reservoir. Here is what has been measured.
- Eutrophic
- Impaired · Algal growth
- 27 ft max depth
Mill Meadow Reservoir in Wayne County, Utah has water-quality measurements published by Utah DWQ, shown here as reported. Water clarity: 5.9 ft visibility. Phosphorus: 66 µg/L. Chlorophyll-a (algae): 22.7 µg/L.
Mill Meadow Reservoir is a productive, nutrient-rich eutrophic lake in Wayne County, Utah with an estimated average depth of about 27 feet. Water clarity is declining over recent sampling years. Compared to the 1 other monitored lakes in Wayne County, Mill Meadow Reservoir ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Utah DWQ, last sampled 2025-09-08. Methodology: how these readings are compared.
Vrbo is where to look for cabins and lake homes around Mill Meadow Reservoir, and Booking.com and Expedia search hotels near the lake for your dates.
Swimming conditions
Readings onlyRecreation use not supported
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. Mill Meadow Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Mill Meadow Reservoir is safe to swim in today is a call for the Utah Division of Water Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Mill Meadow Reservoir
These are the measurements Utah DWQ publishes for Mill Meadow Reservoir, 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 5.9 ft. Phosphorus 66 µg/L. Chlorophyll-a 22.7 µg/L. TSI 59.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5.9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 66µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 22.7µg/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. | 59 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Mill Meadow Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~27 ft est.
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Utah has not published bathymetry for Mill Meadow Reservoir.
Lake Size & Watershed
Watershed (drainage) area
182 sq mi
HydroLAKES / HydroSHEDS
Surface area
114 acres
HydroLAKES / HydroSHEDS
Shoreline
3.3 mi
HydroLAKES / HydroSHEDS
Elevation
7,687 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.
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Stays near Mill Meadow Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Mill Meadow Reservoir in Wayne County, Utah — 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 Mill Meadow Reservoir are listed below.
Top-rated places to stay near Mill Meadow Reservoir
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Fishing Mill Meadow Reservoir
Water Quality Trend: Stable
Based on 4 years of monitoring (2013–2025).
Water clarity
Worsening4 years
Chlorophyll-a
Improving-2.85 µg/L/yr2 years
Reservoir Info (USACE NID)
Mill Meadow Reservoir is a man-made reservoir impounded by the Mill Meadow (completed 1954), built primarily for irrigation on the Fremont River; earth-type dam, 115 ft tall and 700 ft long.
- Normal storage
- 5,231 ac-ft
- Max storage
- 6,870 ac-ft
- Drainage area
- 178 sq mi
- Hazard class
- High
- Owner
- FREMONT IRRIGATION COMPANY
Source: USACE National Inventory of Dams, NID ID UT00208 · Operator website
EPA Impairment Status
Mill Meadow Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit UT-L-14070003-015_00 · Official waterbody report
Nearby Lakes in Wayne County
Frequently asked questions about Mill Meadow Reservoir
Where is Mill Meadow Reservoir?
- Mill Meadow Reservoir is a lake in Wayne County, Utah. Its water-quality measurements are published by Utah DWQ and shown on this page as reported.
What is the water quality of Mill Meadow Reservoir?
- Mill Meadow Reservoir in Wayne County, Utah has water-quality measurements published by Utah DWQ, shown here as reported. Water clarity: 5.9 ft visibility. Phosphorus: 66 µg/L. Chlorophyll-a (algae): 22.7 µg/L.
Is Mill Meadow Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Mill Meadow Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Mill Meadow Reservoir?
- No published bathymetric survey covers Mill Meadow Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 27 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Mill Meadow Reservoir across LakeQuality
Planning a trip around Capitol Reef?
Mill Meadow Reservoir is about 23 miles from Capitol Reef National Park. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Capitol Reef →More lakes in Utah
Other Lakes in Utah
Eutrophic Lakes in Utah
Where this data comes from
52 measurements from 2 monitoring stations, 2013–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Utah Department Of Environmental Quality
UTAHDWQ_WQX52 samples · 2013–2025
Analytical methods
- Field Measurements
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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
Lake size & watershed from HydroLAKES (HydroSHEDS)