Lower Crow Hill Pond
Worcester County, Massachusetts13 acresView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
- Mesotrophic
- Impaired · Nuisance exotic species
- #13 of 24 in the county
- Limited data
Lower Crow Hill Pond in Worcester County, Massachusetts has a water quality grade of A (Excellent). Chlorophyll-a (algae): 2.9 µg/L. Surface area: 13 acres.
- Area
- 13 acres
- Type
- Mesotrophic
- Chlorophyll-a
- 2.9 µg/L
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Watch Lower Crow Hill Pond’s letter
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Lower Crow Hill Pond is a 13-acre mesotrophic lake in Worcester County, Massachusetts. Water quality is graded A based on 1 sampling years through 2017. Compared to the 23 other monitored lakes in Worcester County, Lower Crow Hill Pond ranks #13 for water quality.
Source: EPA Water Quality Portal sampling records, MassDEP, last sampled 2017-09-19. 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. Lower Crow Hill Pond is listed impaired under Clean Water Act §303(d) (IR 4C) for nuisance exotic species. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
No clarity data. Chlorophyll-a 2.9 µg/L. TSI 41. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 2.9 µg/L | Good |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 13 acres |
No bathymetric survey has been published for Lower Crow Hill Pond, so its depth is not documented here.
Fishing Lower Crow Hill Pond
Reservoir Info (USACE NID)
Lower Crow Hill Pond is a man-made reservoir impounded by the Upper Crow Hills Pond Dam (completed 1956), built primarily for recreation on the Flag Brook; earth-type dam, 11 ft tall and 250 ft long.
- Surface area
- 13 ac
- Normal storage
- 28 ac-ft
- Max storage
- 43 ac-ft
- Drainage area
- 0.22 sq mi
- Hazard class
- Significant
- Owner
- MA Department of Conservation and Recreation
Source: USACE National Inventory of Dams, NID ID MA03273 · Operator website · Matched by proximity (0.25 km)
EPA Impairment Status
Lower Crow Hill 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 MA81026 · Official waterbody report
County Ranking
Ranked #13 of 24 lakes in Worcester County
Nearby Lakes in Worcester County
Frequently asked questions about Lower Crow Hill Pond
Where is Lower Crow Hill Pond?
- Lower Crow Hill Pond is a lake in Worcester County, Massachusetts. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lower Crow Hill Pond?
- Lower Crow Hill Pond in Worcester County, Massachusetts has a water quality grade of A (Excellent). Chlorophyll-a (algae): 2.9 µg/L. Surface area: 13 acres.
Is Lower Crow Hill Pond safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Lower Crow Hill Pond is listed impaired under Clean Water Act §303(d) (IR 4C) for nuisance exotic species. Check local advisories before you swim.
Explore Lower Crow Hill Pond across LakeQuality
Species activity outlook by water temperature and season
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Where this data comes from
3 measurements from 1 monitoring station, 2017. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Massachusetts Department of Environmental Protection (MassDEP)
MASSDEP3 samples · 2017
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