Lake Mattie
Polk County, FloridaView mapDirections
No nutrient or algae sampling on record from Florida DEP for this lake.
- Limited data
Lake Mattie in Polk County, Florida has water-quality measurements published by Florida DEP, shown here as reported.
Lake Mattie is a lake in Polk County, Florida. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2023-02-07. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lake Mattie is safe to swim in today is a call for the Florida Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Mattie
These are the measurements Florida DEP publishes for Lake Mattie, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Lake Mattie
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Lake Mattie
Compare lakeside cabins, hotels, and vacation rentals near Lake Mattie in Polk 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.
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Fishing Lake Mattie
Water Quality Trend: Improving
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Phosphorus
Improving-5.53 µg/L/yr6 years
Nearby Lakes in Polk County
Frequently asked questions about Lake Mattie
Where is Lake Mattie?
- Lake Mattie is a lake in Polk County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Lake Mattie?
- Lake Mattie in Polk County, Florida has water-quality measurements published by Florida DEP, shown here as reported.
Is Lake Mattie safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Lake Mattie across LakeQuality
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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)
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.