Old Reservoir
Old Reservoir in Worcester County, Massachusetts is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 37 acres.
- Area
- 37 acres
Next lake in Worcester County
Swipe left or right on this bar to open the next or previous lake.
Why Old 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 Old 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.
Old Reservoir is a 37-acre lake in Worcester County, Massachusetts.
Source: EPA Water Quality Portal sampling records, MassDEP, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Old Reservoir water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Old 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 Old Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Old 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 Old Reservoir
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Massachusetts’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 37 acres |
No bathymetric survey has been published for Old Reservoir, so its depth is not documented here.
Fishing Old Reservoir
Nearby Lakes in Worcester County
Frequently asked questions about Old Reservoir
Where is Old Reservoir?
- Old 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 Old Reservoir?
- Old Reservoir in Worcester County, Massachusetts is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 37 acres.
Is Old Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Old 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 Old Reservoir across LakeQuality
More Massachusetts Lake Rankings
Top 25 by overall water quality score
Top 25 by Secchi water clarity
Grade A/B + low algae filter
Panfish-rich, public access
Full state directory
Other Lakes in Massachusetts
Where this data comes from
Measurements for Old Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.