Frisco Lake
Phelps County, MissouriView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Impaired · Mercury
- Limited data
Frisco Lake in Phelps County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar.
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Watch Frisco Lake’s letter
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Why Frisco Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Frisco Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Missouri DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Frisco Lake is a lake in Phelps County, Missouri.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2023-05-11. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Frisco Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Water quality measurements for Frisco Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Fishing Frisco Lake
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.
Graded lakes near Frisco Lake
Frisco Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Phelps County
Frequently asked questions about Frisco Lake
Where is Frisco Lake?
- Frisco Lake is a lake in Phelps County, Missouri. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Frisco Lake?
- Frisco Lake in Phelps County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar.
Is Frisco Lake safe to swim in?
- The letter is not a swimming clearance. Frisco Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Explore Frisco Lake across LakeQuality
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Where this data comes from
3 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Missouri Dept. of Natural Resources
MDNR3 samples · 2023
Analytical methods
- Depth, Secchi disk in meters
- Nitrogen and Phosphorus, Total, Whole-water, Alkaline Persulfate Digest
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)