Lake Manassas
Lake Manassas in Prince William County, Virginia is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 685 acres.
- Area
- 685 acres
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Why Lake Manassas 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 Lake Manassas, 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 Virginia DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Manassas is a 685-acre lake in Prince William County, Virginia.
Source: EPA Water Quality Portal sampling records, Virginia DEQ, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Lake Manassas 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 Lake Manassas
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 Lake Manassas
Compare lakeside cabins, hotels, and vacation rentals near Lake Manassas in Prince William County, Virginia — 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 Lake Manassas
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Planning a whole trip? See where to stay at Virginia’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 685 acres |
No bathymetric survey has been published for Lake Manassas, so its depth is not documented here.
Fishing Lake Manassas
Nearby Lakes in Prince William County
Frequently asked questions about Lake Manassas
Where is Lake Manassas?
- Lake Manassas is a lake in Prince William County, Virginia. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Lake Manassas?
- Lake Manassas in Prince William County, Virginia is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 685 acres.
Is Lake Manassas safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Lake Manassas is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Lake Manassas across LakeQuality
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Where this data comes from
Measurements for Lake Manassas come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.