Lake Five
Lake Five in Washington County, Wisconsin has a water quality grade of B (Good). Water clarity: 12 ft visibility. Phosphorus: 14.2 µg/L. Maximum depth: 23 ft. Surface area: 104 acres.
Wisconsin DNR lists Largemouth Bass as common on Lake Five. DNR survey details →
- Clarity
- 12 ft
- Typical in August
- 78°F
- Max depth
- 23 ft
- Area
- 104 acres
- Type
- Mesotrophic
- Trend
- → Stable
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Lake Five is a 104-acre mesotrophic lake in Washington County, Wisconsin with a maximum depth of 23 feet. Water quality is graded B based on 1 sampling years through 2026. Water clarity is declining over recent sampling years. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Compared to the 12 other monitored lakes in Washington County, Lake Five ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-21. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Good clarity, visible to about 12 ft. Phosphorus level: 14.2 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12 ft | Not graded |
| Phosphorus | 14.2 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lake Five
Compare lakeside cabins, hotels, and vacation rentals near Lake Five in Washington County, Wisconsin — 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 Five
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Water Temperature
Lake Five typically sits around 78°F at the surface in August. Summer average is about 77°F. Usually warmest in Jul (about 78°F) and coldest in May (about 69°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 15 field readings (2024–2026) via the EPA Water Quality Portal. See the full Lake Five water temperature breakdown →
Wisconsin DNR lists Largemouth Bass as common on Lake Five.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Lake Five B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1990. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 23 ft |
| Surface Area | 104 acres |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Lake Five
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: → Stable
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.527 m/yr | 7 |
| Phosphorus | ↑ Improving | -0.41 µg/L/yr | 7 |
County Ranking
Ranked #9 of 13 lakes in Washington County
Nearby Lakes in Washington County
Frequently asked questions about Lake Five
Where is Lake Five?
- Lake Five is a lake in Washington County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Five?
- Lake Five in Washington County, Wisconsin has a water quality grade of B (Good). Water clarity: 12 ft visibility. Phosphorus: 14.2 µg/L. Maximum depth: 23 ft. Surface area: 104 acres.
Is Lake Five safe to swim in?
- Good for swimming, clear water with low algae levels. Lake Five has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Lake Five?
- Lake Five typically sits around 78°F at the surface in August, from 15 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Lake Five?
- Lake Five has a maximum depth of 23 feet. The lake covers 104 acres.
What fish are in Lake Five?
- Fish species found in Lake Five include Panfish, Largemouth Bass, Northern Pike. Lake Five is located in Washington County, Wisconsin.
What did the DNR fisheries survey find at Lake Five?
- Wisconsin DNR lists Largemouth Bass as common on Lake Five. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Lake Five B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
Explore Lake Five across LakeQuality
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Species activity outlook by water temperature and season
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Moderate nutrients, good water quality
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State Parks Near Lake Five
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
40 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX40 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes