Lake Parker
Orleans County, VermontView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
- Mesotrophic
- #8 of 17 in the county
- 42 ft max depth
- Public access
Lake Parker in Orleans County, Vermont has a water quality grade of A (Excellent). Water clarity: 13.1 ft visibility. Phosphorus: 15.7 µg/L. Chlorophyll-a (algae): 4.2 µg/L.
- Clarity
- 13.1 ft
- Max depth
- ~42 ft est.
- Type
- Mesotrophic
- Phosphorus
- 15.7 µg/L
- Chlorophyll-a
- 4.2 µg/L
- Trend
- ↑ Improving
- Public access
- Yes
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Watch Lake Parker’s letter
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Lake Parker is a mesotrophic lake in Orleans County, Vermont with an estimated average depth of about 42 feet. Water quality is graded A based on 2 sampling years through 2025. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 16 other monitored lakes in Orleans County, Lake Parker ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, VT DEC, last sampled 2025-08-14. Grade methodology: LakeQuality methodology.
What Lake Parker is good for
From access and monitoring records, not editorial picks.
- Clear water13.1 ft of visibility
- Boat launch1 documented ramp
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.
The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Good clarity, visible to about 13.1 ft. Phosphorus 15.7 µg/L. Chlorophyll-a 4.2 µg/L. TSI 43. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13.1 ft | Not graded |
| Phosphorus | 15.7 µg/L | Good |
| Chlorophyll-a (Algae) | 4.2 µg/L | Good |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~42 ft est. |
| Average Depth | ~19 ft est. |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Vermont has not published bathymetry for Lake Parker.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Lake ParkerPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Parker
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.205 m/yr | 5 |
| Phosphorus | ↓ Declining | +0.41 µg/L/yr | 5 |
| Chlorophyll-a | ↑ Improving | -0.63 µg/L/yr | 5 |
County Ranking
Ranked #8 of 17 lakes in Orleans County
Nearby Lakes in Orleans County
Frequently asked questions about Lake Parker
Where is Lake Parker?
- Lake Parker is a lake in Orleans County, Vermont. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Parker?
- Lake Parker in Orleans County, Vermont has a water quality grade of A (Excellent). Water clarity: 13.1 ft visibility. Phosphorus: 15.7 µg/L. Chlorophyll-a (algae): 4.2 µg/L.
Is Lake Parker safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Lake Parker?
- No published bathymetric survey covers Lake Parker, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 42 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there boat ramps on Lake Parker?
- Lake Parker has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Parker. Public access is listed as yes.
Explore Lake Parker across LakeQuality
More Vermont Lake Rankings
Other Grade A Lakes in Vermont
Mesotrophic Lakes in Vermont
Where this data comes from
176 measurements from 2 monitoring stations, 2021–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Vermont Dept of Environmental Conservation
1VTDECWQ176 samples · 2021–2025
Analytical methods
- EPA approved Alternate Test Procedure for 4500 P H. Has a 28 day hold without acid preservation.
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (2)
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)
Named boat-access points from the USGS National Boat Ramps inventory