Pool
Washington County, Minnesota8,393 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Pool. Here is what has been measured.
- Eutrophic
- Eurasian watermilfoil
- 78 ft max depth
- Public access
Ask about Pool
Answers come straight from the public measurements and survey records on this page.
Pool in Washington County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 5.9 ft visibility. Phosphorus: 31.1 µg/L. Maximum depth: 78 ft. Surface area: 8393.04 acres.
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Pool is a 8,393-acre productive, nutrient-rich eutrophic lake in Washington County, Minnesota with a maximum depth of 78 feet. Water clarity is improving over recent sampling years. The lake supports 36 documented fish species including bigmouth buffalo, black bullhead, and black crappie. Public access is available with 2 public boat landings. Compared to the 74 other monitored lakes in Washington County, Pool ranks #22 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-10-29. Grade methodology: LakeQuality methodology.
What Pool is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
- Fishing36 species recorded
- Deep water78 ft surveyed max depth
- Big water8,393 acres
Swimming conditions
Readings onlyLow algae
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. Check local advisories before you swim.
Whether Pool is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Pool
These are the measurements Minnesota PCA publishes for Pool, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 5.9 ft. Phosphorus 31.1 µg/L. TSI 53.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.9 ft | Measured, not scored |
| Phosphorus | 31.1 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 78 ft |
| Surface Area | 8,393 acres |
| Shoreline Length | 124.5 mi |
| Public Access | Yes |
Recreation & Access
- Jacques ParkPublic
- Upper Vermillion RiverPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every lake where it is documented.
Fishing Pool
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 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.084 m/yr | 5 |
| Phosphorus | ↓ Declining | +7.2 µg/L/yr | 5 |
Nearby Lakes in Washington County
Frequently asked questions about Pool
Where is Pool?
- Pool is a lake in Washington County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Pool?
- Pool in Washington County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 5.9 ft visibility. Phosphorus: 31.1 µg/L. Maximum depth: 78 ft. Surface area: 8393.04 acres.
Is Pool safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Pool?
- Pool has a maximum depth of 78 feet. The lake covers 8393.04 acres.
What fish are in Pool?
- Fish species found in Pool include bigmouth buffalo, black bullhead, black crappie, bluegill, channel catfish, common carp, flathead catfish, freshwater drum, gizzard shad, golden redhorse, highfin carpsucker, hybrid sunfish, lake sturgeon, largemouth bass, longnose gar, mooneye, muskellunge, northern pike, paddlefish, quillback, river carpsucker, river redhorse, rock bass, sauger, shorthead redhorse, shortnose gar, silver redhorse, smallmouth bass, smallmouth buffalo, spotted sucker, walleye, walleye/sauger, white bass, white crappie, white sucker, yellow perch. Pool is located in Washington County, Minnesota.
Are there boat ramps on Pool?
- Pool has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Jacques Park, Upper Vermillion River. Public access is listed as yes.
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Where this data comes from
71 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- National Park Service Water Resources Division
11NPSWRD_WQX71 samples · 2020–2024
Analytical methods
- Secchi Disk
- Alkaline Persulfate Digestion for Total N and P in Water
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
Lake details from Minnesota DNR LakeFinder
Named boat-access points from the USGS National Boat Ramps inventory