Hallockville Pond
Franklin County, Massachusetts16 acresView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
- Oligotrophic
- Impaired · Mercury
- #4 of 4 in the county
- Public access
- Limited data
Hallockville Pond in Franklin County, Massachusetts has a water quality grade of A (Excellent). Chlorophyll-a (algae): 1.2 µg/L. Surface area: 16 acres.
- Area
- 16 acres
- Type
- Oligotrophic
- Chlorophyll-a
- 1.2 µg/L
- Public access
- Yes
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Watch Hallockville Pond’s letter
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Hallockville Pond is a 16-acre cold, clear oligotrophic lake in Franklin County, Massachusetts. Water quality is graded A based on 1 sampling years through 2016. Limited fish-species data available. Public access is available. Compared to the 3 other monitored lakes in Franklin County, Hallockville Pond ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, MassDEP, last sampled 2016-09-01. Grade methodology: LakeQuality methodology.
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.
The A is nutrients and algae, not a swimming clearance. Hallockville Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
No clarity data. Chlorophyll-a 1.2 µg/L. TSI 32. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 1.2 µg/L | Good |
| Trophic State Index (TSI) | 32 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 16 acres |
| Public Access | Yes |
No bathymetric survey has been published for Hallockville Pond, so its depth is not documented here.
Fishing Hallockville Pond
Reservoir Info (USACE NID)
Hallockville Pond is a man-made reservoir impounded by the Hallockville Pond Dam, built primarily for recreation on the King Brook; earth-type dam, 15 ft tall and 132 ft long.
- Surface area
- 16 ac
- Normal storage
- 70 ac-ft
- Max storage
- 175 ac-ft
- Drainage area
- 1.65 sq mi
- Hazard class
- Significant
- Owner
- MA Department of Conservation and Recreation
Source: USACE National Inventory of Dams, NID ID MA00465 · Operator website
EPA Impairment Status
Hallockville Pond is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MA33017 · Official waterbody report · Matched by proximity (1.52 km)
County Ranking
Ranked #4 of 4 lakes in Franklin County
Nearby Lakes in Franklin County
Frequently asked questions about Hallockville Pond
Where is Hallockville Pond?
- Hallockville Pond is a lake in Franklin County, Massachusetts. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Hallockville Pond?
- Hallockville Pond in Franklin County, Massachusetts has a water quality grade of A (Excellent). Chlorophyll-a (algae): 1.2 µg/L. Surface area: 16 acres.
Is Hallockville Pond safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Hallockville Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Explore Hallockville Pond across LakeQuality
2 documented falls within 9.8 mi, nearest Tannery Falls
Species activity outlook by water temperature and season
Where to stay at Massachusetts's top lakes, each with its grade
Low nutrients, clear water. The letter is not a swimming clearance.
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Where this data comes from
3 measurements from 1 monitoring station, 2016. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Massachusetts Department of Environmental Protection (MassDEP)
MASSDEP3 samples · 2016
Analytical methods
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
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