North Hartland Reservoir
Windsor County, Vermont215 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Impaired · Hydrologic alteration
- 32 ft max depth
- Public access
- Limited data
North Hartland Reservoir in Windsor County, Vermont is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 215 acres.
- Max depth
- ~32 ft est.
- Area
- 215 acres
- Public access
- Yes
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Watch North Hartland Reservoir’s letter
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Why North Hartland Reservoir 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 North Hartland Reservoir, 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 VT DEC and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
North Hartland Reservoir is a 215-acre lake in Windsor County, Vermont with an estimated average depth of about 32 feet. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, VT DEC, last sampled 2024-04-22. Grade methodology: LakeQuality methodology.
What North Hartland Reservoir is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. North Hartland Reservoir is listed impaired under Clean Water Act §303(d) (IR 4C) for hydrologic alteration. Check local advisories before you swim.
Water quality measurements for North Hartland Reservoir
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 |
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~32 ft est. |
| Average Depth | ~28 ft est. |
| Surface Area | 215 acres |
| 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 North Hartland Reservoir.
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
- North Hartland Lake Recreation AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing North Hartland Reservoir
Reservoir Info (USACE NID)
North Hartland Reservoir is a man-made reservoir impounded by the North Hartland Dam (completed 1961), built primarily for flood risk reduction on the Ottauquechee River; rockfill-type dam, 182 ft tall and 1,640 ft long.
- Surface area
- 215 ac
- Normal storage
- 2,350 ac-ft
- Max storage
- 94,600 ac-ft
- Drainage area
- 220 sq mi
- Hazard class
- High
- Owner
- USACE - New England District
All listed purposes: Flood Risk Reduction;Recreation;Hydroelectric.
Source: USACE National Inventory of Dams, NID ID VT00002 · Operator website
EPA Impairment Status
North Hartland Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4C).
Causes of impairment
Source: EPA ATTAINS assessment unit VT10-02L01_01 · Official waterbody report
Graded lakes near North Hartland Reservoir
North Hartland Reservoir has no grade, but these lakes within a short drive do.
Nearby Lakes in Windsor County
Frequently asked questions about North Hartland Reservoir
Where is North Hartland Reservoir?
- North Hartland Reservoir is a lake in Windsor County, Vermont. 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 North Hartland Reservoir?
- North Hartland Reservoir in Windsor County, Vermont is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 215 acres.
Is North Hartland Reservoir safe to swim in?
- The letter is not a swimming clearance. North Hartland Reservoir is listed impaired under Clean Water Act §303(d) (IR 4C) for hydrologic alteration. Check local advisories before you swim.
How deep is North Hartland Reservoir?
- No published bathymetric survey covers North Hartland Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 32 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 215 acres.
Are there boat ramps on North Hartland Reservoir?
- North Hartland Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include North Hartland Lake Recreation Area. Public access is listed as yes.
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Where this data comes from
4 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Vermont Dept of Environmental Conservation
1VTDECWQ4 samples · 2024
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 (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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory