Manning Creek Lake
Piute County, UtahView mapDirections
Utah DWQ publishes the water-quality measurements for Manning Creek Lake. Here is what has been measured.
- Impaired · Algal growth
- Limited data
Manning Creek Lake in Piute County, Utah has water-quality measurements published by Utah DWQ, shown here as reported. Phosphorus: 59 µg/L. Chlorophyll-a (algae): 1.9 µg/L.
Manning Creek Lake is a lake in Piute County, Utah. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Utah DWQ, last sampled 2020-09-02. Methodology: how these readings are compared.
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Manning Creek Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen), pH / acidity. Check local advisories before you swim.
Whether Manning Creek Lake 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 Manning Creek Lake
These are the measurements Utah DWQ publishes for Manning Creek Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 59 µg/L. Chlorophyll-a 1.9 µg/L. TSI 50.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 59µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 1.9µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 50 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Answers come straight from the public measurements and survey records on this page.
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Fishing Manning Creek Lake
Water quality readings over time
2 seasons of samples on record (2014–2020). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving2 years
Reservoir Info (USACE NID)
Manning Creek Lake is a man-made reservoir impounded by the Manning Meadow (completed 1970), built primarily for irrigation on the Manning Creek; earth-type dam, 85 ft tall and 315 ft long.
- Normal storage
- 1,000 ac-ft
- Max storage
- 1,369 ac-ft
- Drainage area
- 2 sq mi
- Hazard class
- Significant
- Owner
- DIVISION OF WILDLIFE RESOURCES
Source: USACE National Inventory of Dams, NID ID UT00195 · Operator website · Matched by proximity (0.61 km)
EPA Impairment Status
Manning Creek Lake 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.
Source: EPA ATTAINS assessment unit UT-L-16030003-006_00 · Official waterbody report
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Frequently asked questions about Manning Creek Lake
Where is Manning Creek Lake?
- Manning Creek Lake is a lake in Piute County, Utah. Its water-quality measurements are published by Utah DWQ and shown on this page as reported.
What is the water quality of Manning Creek Lake?
- Manning Creek Lake in Piute County, Utah has water-quality measurements published by Utah DWQ, shown here as reported. Phosphorus: 59 µg/L. Chlorophyll-a (algae): 1.9 µg/L.
Is Manning Creek Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Manning Creek Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen), pH / acidity. Check local advisories before you swim.
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Where this data comes from
3 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Utah Department Of Environmental Quality
UTAHDWQ_WQX3 samples · 2020
Analytical methods
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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
Impairment status from EPA ATTAINS 303(d) database