Lake Clarke
Lake Clarke in Palm Beach County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar.
- Typical in August
- 86°F
- Trend
- ↓ Declining
- Public access
- Yes
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Why Lake Clarke 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 Lake Clarke, 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 FDEP and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Clarke is a lake in Palm Beach County, Florida. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2021-05-18. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedBacteria C
Based on E. coli testing, Lake Clarke occasionally exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 9.1% of 11 samples across 2 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Florida’s current beach and health-department advisories before swimming.
Water quality measurements for Lake Clarke
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 |
Where to stay near Lake Clarke
Compare lakeside cabins, hotels, and vacation rentals near Lake Clarke in Palm Beach 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 Lake Clarke
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Lake Clarke typically sits around 86°F at the surface in August. Summer average is about 85°F. Usually warmest in Aug (about 86°F) and coldest in Jan (about 68°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 73 field readings (2010–2021) via the EPA Water Quality Portal. See the full Lake Clarke water temperature breakdown →
Recreation & Access
- Barbados Road AccessPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Clarke
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.096 m/yr | 4 |
| Phosphorus | ↓ Declining | +12.75 µg/L/yr | 4 |
EPA Impairment Status
Lake Clarke 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 FL3245B · Official waterbody report
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Lake Clarke under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger.
- Lake Clarke Shores, Town OfWest Palm Beach · 0.2 mi away · NPDES FLS645389Major
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.
Nearby Lakes in Palm Beach County
Frequently asked questions about Lake Clarke
Where is Lake Clarke?
- Lake Clarke is a lake in Palm Beach 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 Lake Clarke?
- Lake Clarke in Palm Beach County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar.
Is Lake Clarke safe to swim in?
- Based on E. coli testing, Lake Clarke occasionally exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 9.1% of 11 samples across 2 seasons. That works out to a bacteria swim-safety grade of C — a historical summary of past testing, not a current reading. Lake Clarke is not rated for water quality — its monitoring record does not meet the evidence bar. Bacteria levels can spike quickly after heavy rain, so always check Florida's current beach and health-department advisories before you swim.
What is the water temperature of Lake Clarke?
- Lake Clarke typically sits around 86°F at the surface in August, from 73 EPA Water Quality Portal field readings (2010–2021). That is a typical value for the month, not a live reading.
Are there boat ramps on Lake Clarke?
- Lake Clarke has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Barbados Road Access. Public access is listed as yes.
Explore Lake Clarke across LakeQuality
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Where this data comes from
1 measurement from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples1 sample · 2021
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)
Named boat-access points from the USGS National Boat Ramps inventory