Irvin Lake
Hernando County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Irvin Lake. Here is what has been measured.
- Hypereutrophic
- Impaired · Impaired biota (cause unknown)
Irvin Lake in Hernando County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 1.3 ft visibility. Phosphorus: 180 µg/L.
Irvin Lake is a highly nutrient-loaded hypereutrophic lake in Hernando County, Florida. Water clarity is improving over recent sampling years. Compared to the 8 other monitored lakes in Hernando County, Irvin Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-08-19. Methodology: how these readings are compared.
Swimming conditions
Readings onlyElevated nutrients
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Irvin Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
Whether Irvin Lake 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 Irvin Lake
These are the measurements Florida DEP publishes for Irvin Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 1.3 ft of visibility. Phosphorus 180 µg/L. TSI 76.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 180µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | No reading 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. | 76 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Irvin Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Irvin Lake typically sits around 80°F at the surface in October. Summer average is about 86°F. Usually warmest in Aug (about 88°F) and coldest in Jan (about 61°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (61°F) to its warmest (88°F).
Typical surface water temperature by month, from 91 field readings (2010–2024) via the EPA Water Quality Portal. See the full Irvin Lake water temperature breakdown →
Stays via Stay22
Stays near Irvin Lake
Compare lakeside cabins, hotels, and vacation rentals near Irvin Lake in Hernando 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Irvin Lake are listed below.
Top-rated places to stay near Irvin Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Planning a whole trip? See where to stay at Florida’s top lakes →
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Fishing Irvin Lake
Water Quality Trend: Stable
Based on 4 years of monitoring (2020–2024).
Water clarity
Improving4 years
Phosphorus
Worsening+50 µg/L/yr4 years
EPA Impairment Status
Irvin Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit FL1329M · Official waterbody report
Nearby Lakes in Hernando County
Frequently asked questions about Irvin Lake
Where is Irvin Lake?
- Irvin Lake is a lake in Hernando County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Irvin Lake?
- Irvin Lake in Hernando County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 1.3 ft visibility. Phosphorus: 180 µg/L.
Is Irvin Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Irvin Lake is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
What is the water temperature of Irvin Lake?
- Irvin Lake typically sits around 80°F at the surface in October, from 91 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
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Where this data comes from
47 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples47 samples · 2020–2024
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