Horn Pond is a productive, nutrient-rich eutrophic lake in Middlesex County, Massachusetts. Water quality is graded C based on 1 sampling years through 2019. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 14 other monitored lakes in Middlesex County, Horn Pond ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, Massachusetts DNR, last sampled 2019-10-29. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
No clarity data. Chlorophyll-a: 12.9 µg/L. Trophic State Index: 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 12.9 µg/L | C |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Horn Pond
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Fishing Horn Pond
Recreation & Access
Location
County Ranking
Ranked #8 of 15 lakes in Middlesex County
Nearby Lakes in Middlesex County
Explore Horn Pond across LakeGrade
Species activity outlook by water temperature and season
Where to stay at Massachusetts's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
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Grade A/B + low algae filter
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More records, surveys & data sources
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2019-10-29
Monitoring stations: 1