Frisco Lake is a productive, nutrient-rich eutrophic lake in Phelps County, Missouri. Water quality is graded D based on 3 sampling years through 2023. Compared to the 2 other monitored lakes in Phelps County, Frisco Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2023-05-11. 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
Murky, only visible to about 3.8 ft. Phosphorus level: 61 µg/L. Chlorophyll-a: 10.9 µg/L. Trophic State Index: 58.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.8 ft | D |
| Phosphorus | 61 µg/L | D |
| Chlorophyll-a (Algae) | 10.9 µg/L | C |
| Trophic State Index (TSI) | 58 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Frisco Lake
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Fishing Frisco Lake
Location
County Ranking
Ranked #3 of 3 lakes in Phelps County
Cleaner Lakes Within 30 Miles
Frisco Lake holds Grade D. 3 nearby lakes hold higher grades.
- CLittle Prairie LakePhelps County · 4.9 mi · Higher grade (D → C)
- CLittle Prairie Lake by DamPhelps County · 5 mi · Higher grade (D → C)
- CRinquelin Trail Comm. LakeMaries County · 22.7 mi · Higher grade (D → C)
Nearby Lakes in Phelps County
Explore Frisco Lake across LakeGrade
More Missouri Lake Rankings
Other Grade D Lakes in Missouri
Eutrophic Lakes in Missouri
More records, surveys & data sources
EPA Impairment Status
Frisco 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_7280.00 · Official waterbody report
Regulated Pollution Sources Nearby
22 EPA-permitted facilities operate within about 5 miles of Frisco Lake under Clean Water Act (NPDES) discharge permits, including 3 classified by the EPA as major dischargers. 11 facilities have a reported Clean Water Act violation in the past three years.
- Rolla Vichy Road WwtpRolla · 1.5 mi away · NPDES MO0047031MajorRecent violation
- Rolla Se WwtpRolla · 2.8 mi away · NPDES MO0050652MajorRecent violation
- Rolla Southwest WwtpRolla · 3.9 mi away · NPDES MO0047023MajorRecent violation
- Pcpwsd No 2, Twitty Industrial Park WwtpRolla · 1.3 mi away · NPDES MO0129704Recent violation
- Pcpwsd No. 2 College Hills North WwtpRolla · 1.6 mi away · NPDES MO0126748Recent violation
- Oak Forest Subdivision WwtpRolla · 1.7 mi away · NPDES MO0113263Recent 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)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-05-11
Monitoring stations: 1