Mrrlake
Mrrlake in Seminole County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.5 ft visibility. Phosphorus: 13 µg/L.
- Clarity
- 11.5 ft
- Trend
- ↑ Improving
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Why Mrrlake 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 Mrrlake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
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 FDEP and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Mrrlake is a lake in Seminole County, Florida. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2023-08-02. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Mrrlake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 11.5 ft. Phosphorus level: 13 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.5 ft | Not graded |
| Phosphorus | 13 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Mrrlake
Compare lakeside cabins, hotels, and vacation rentals near Mrrlake in Seminole County, Florida — 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.
Top-rated places to stay near Mrrlake
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Fishing Mrrlake
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.2 m/yr | 6 |
| Phosphorus | ↑ Improving | -7.5 µg/L/yr | 5 |
EPA Impairment Status
Mrrlake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL3004A · Official waterbody report · Matched by proximity (1.91 km)
Graded lakes near Mrrlake
Mrrlake has no grade, but these lakes within a short drive do.
Nearby Lakes in Seminole County
Frequently asked questions about Mrrlake
Where is Mrrlake?
- Mrrlake is a lake in Seminole County, Florida. 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 Mrrlake?
- Mrrlake in Seminole County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.5 ft visibility. Phosphorus: 13 µg/L.
Is Mrrlake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Mrrlake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Mrrlake across LakeQuality
More Florida Lake Rankings
Other Lakes in Florida
Mesotrophic Lakes in Florida
Where this data comes from
2 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples2 samples · 2023
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