Hapgood Pond
Bennington County, Vermont8 acresView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
↑ up from B at the last regrade
- Mesotrophic
- Impaired · Hydrologic alteration
- #2 of 8 in the county
Hapgood Pond in Bennington County, Vermont has a water quality grade of A (Excellent). Water clarity: 9.2 ft visibility. Phosphorus: 11.8 µg/L. Chlorophyll-a (algae): 2.7 µg/L. Surface area: 8 acres.
- Clarity
- 9.2 ft
- Area
- 8 acres
- Type
- Mesotrophic
- Phosphorus
- 11.8 µg/L
- Chlorophyll-a
- 2.7 µg/L
- Trend
- ↑ Improving
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Watch Hapgood Pond’s letter
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Hapgood Pond is a 8-acre mesotrophic lake in Bennington County, Vermont. Water quality is graded A based on 2 sampling years through 2025. Overall water quality is improving over recent sampling years. Compared to the 7 other monitored lakes in Bennington County, Hapgood Pond ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, VT DEC, last sampled 2025-08-27. Grade methodology: LakeQuality methodology.
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. Hapgood Pond is listed impaired under Clean Water Act §303(d) (IR 4C) for hydrologic alteration. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Moderate clarity, visible to about 9.2 ft. Phosphorus 11.8 µg/L. Chlorophyll-a 2.7 µg/L. TSI 42. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.2 ft | Not graded |
| Phosphorus | 11.8 µg/L | Good |
| Chlorophyll-a (Algae) | 2.7 µg/L | Good |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 8 acres |
No bathymetric survey has been published for Hapgood Pond, so its depth is not documented here.
Fishing Hapgood Pond
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.635 m/yr | 3 |
| Phosphorus | ↑ Improving | -1.12 µg/L/yr | 4 |
| Chlorophyll-a | ↑ Improving | -0.5 µg/L/yr | 4 |
Reservoir Info (USACE NID)
Hapgood Pond is a man-made reservoir impounded by the Hapgood Pond Dam (completed 1980), built primarily for water supply on the Flood Brook; other-type dam, 27 ft tall and 128 ft long.
- Surface area
- 8 ac
- Normal storage
- 43 ac-ft
- Max storage
- 86 ac-ft
- Drainage area
- 4 sq mi
- Hazard class
- Low
- Owner
- USDA FS
Source: USACE National Inventory of Dams, NID ID VT00354 · Operator website
EPA Impairment Status
Hapgood Pond 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 VT11-18L01 · Official waterbody report
County Ranking
Ranked #2 of 8 lakes in Bennington County
Nearby Lakes in Bennington County
Frequently asked questions about Hapgood Pond
Where is Hapgood Pond?
- Hapgood Pond is a lake in Bennington County, Vermont. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Hapgood Pond?
- Hapgood Pond in Bennington County, Vermont has a water quality grade of A (Excellent). Water clarity: 9.2 ft visibility. Phosphorus: 11.8 µg/L. Chlorophyll-a (algae): 2.7 µg/L. Surface area: 8 acres.
Is Hapgood Pond safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Hapgood Pond is listed impaired under Clean Water Act §303(d) (IR 4C) for hydrologic alteration. Check local advisories before you swim.
Explore Hapgood Pond across LakeQuality
More Vermont Lake Rankings
Other Grade A Lakes in Vermont
Mesotrophic Lakes in Vermont
Where this data comes from
69 measurements from 2 monitoring stations, 2022–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Vermont Dept of Environmental Conservation
1VTDECWQ69 samples · 2022–2025
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
Impairment status from EPA ATTAINS 303(d) database