Number Five Reservoir
Number Five Reservoir in Worcester County, Massachusetts is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 31 acres.
- Area
- 31 acres
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Why Number Five 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 Number Five Reservoir, no water-quality sampling on record for this lake.
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 MassDEP and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Number Five Reservoir is a 31-acre lake in Worcester County, Massachusetts.
Source: EPA Water Quality Portal sampling records, MassDEP, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Number Five Reservoir water quality
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Number Five Reservoir
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Number Five Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Number Five Reservoir in Worcester County, Massachusetts — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Number Five Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 31 acres |
No bathymetric survey has been published for Number Five Reservoir, so its depth is not documented here.
Fishing Number Five Reservoir
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Frequently asked questions about Number Five Reservoir
Where is Number Five Reservoir?
- Number Five Reservoir is a lake in Worcester County, Massachusetts. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Number Five Reservoir?
- Number Five Reservoir in Worcester County, Massachusetts is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 31 acres.
Is Number Five Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Number Five Reservoir is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Number Five Reservoir across LakeQuality
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Where this data comes from
Measurements for Number Five Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.