Mccarty Lake
Mccarty Lake in Hubbard County, Minnesota has a water quality grade of A (Excellent). Water clarity: 9 ft visibility. Phosphorus: 12 µg/L. Chlorophyll-a (algae): 4.3 µg/L.
- Clarity
- 9 ft
- Typical in August
- 59°F
- Type
- Mesotrophic
- Trend
- ↓ Declining
- Public access
- Yes
Next lake in Hubbard County
Mccarty Lake is a mesotrophic lake in Hubbard County, Minnesota. Water quality is graded A based on 2 sampling years through 2023. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 67 other monitored lakes in Hubbard County, Mccarty Lake ranks #51 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2023-09-19. Grade methodology: LakeGrade methodology.
Watch Mccarty Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Grade onlyLimited data
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.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
Moderate clarity, visible to about 9 ft. Phosphorus level: 12 µg/L. Chlorophyll-a: 4.3 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9 ft | Not graded |
| Phosphorus | 12 µg/L | Good |
| Chlorophyll-a (Algae) | 4.3 µg/L | Good |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Mccarty Lake
Compare lakeside cabins, hotels, and vacation rentals near Mccarty Lake in Hubbard County, Minnesota — 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 Mccarty Lake
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 Minnesota’s top lakes →
Water Temperature
Mccarty Lake typically sits around 59°F at the surface in August. Summer average is about 61°F. Usually warmest in Jul (about 67°F) and coldest in May (about 51°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 41 field readings (2023–2023) via the EPA Water Quality Portal. See the full Mccarty Lake water temperature breakdown →
Recreation & Access
- McCarty LakePublic
Fishing Mccarty Lake
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Mccarty Lake. 2 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Aquatic Plant Report — McCarty (1301)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — McCartyPublic Water Access Sites · MN DNR LakeFinder
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.41 m/yr | 2 |
| Phosphorus | ↓ Declining | +2.5 µg/L/yr | 2 |
| Chlorophyll-a | ↓ Declining | +2.7 µg/L/yr | 2 |
County Ranking
Ranked #51 of 68 lakes in Hubbard County
Nearby Lakes in Hubbard County
Frequently asked questions about Mccarty Lake
What is the water quality grade for Mccarty Lake?
- Mccarty Lake in Hubbard County, Minnesota has a water quality grade of A (Excellent). Water clarity: 9 ft visibility. Phosphorus: 12 µg/L. Chlorophyll-a (algae): 4.3 µg/L.
Is Mccarty Lake safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Mccarty Lake has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 4.3 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Mccarty Lake?
- Mccarty Lake typically sits around 59°F at the surface in August, from 41 EPA Water Quality Portal field readings (2023–2023). That is a typical value for the month, not a live reading.
Are there boat ramps on Mccarty Lake?
- Mccarty Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include McCarty Lake. Public access is listed as yes.
Explore Mccarty Lake across LakeGrade
Fish species and top-graded lakes across Minnesota
Fish species and best lakes in Hubbard County
Species activity outlook by water temperature and season
Top lakes and where to stay in the Park Rapids Area area
Where to stay at Minnesota's top lakes, each with its grade
Lakes in the Mississippi Headwaters, ranked by water quality
Moderate nutrients, good water quality
Minnesota's cleanest and most-polluted lakes, ranked
More Minnesota Lake Rankings
State Parks Near Mccarty Lake
Other Grade A Lakes in Minnesota
Mesotrophic Lakes in Minnesota
Where this data comes from
50 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA50 samples · 2023
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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
Named boat-access points from the USGS National Boat Ramps inventory