Bath Covered Bridge Lake
Bath Covered Bridge Lake in Grafton County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 24 acres.
- Area
- 24 acres
Why Bath Covered Bridge Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: 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 Bath Covered Bridge Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
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 your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Bath Covered Bridge Lake is a 24-acre lake in Grafton County, New Hampshire.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-09-23. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedBacteria advisory
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Bath Covered Bridge Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Where to stay near Bath Covered Bridge Lake
Compare lakeside cabins, hotels, and vacation rentals near Bath Covered Bridge Lake in Grafton County, New Hampshire — 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 Bath Covered Bridge Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 24 acres |
No bathymetric survey has been published for Bath Covered Bridge Lake, so its depth is not documented here.
Fishing Bath Covered Bridge Lake
Reservoir Info (USACE NID)
Bath Covered Bridge Lake is a man-made reservoir impounded by the Ammonoosuc River (completed 1900), built primarily for hydroelectric on the Ammonoosuc River; concrete-type dam, 17 ft tall and 365 ft long.
- Surface area
- 24 ac
- Normal storage
- 280 ac-ft
- Max storage
- 352 ac-ft
- Drainage area
- 395 sq mi
- Hazard class
- Low
- Owner
- Bath Electric Power Company LLC
Source: USACE National Inventory of Dams, NID ID NH00061 · Operator website · Matched by proximity (0.06 km)
EPA Impairment Status
Bath Covered Bridge Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHIMP801030506-02 · Official waterbody report · Matched by proximity (0.4 km)
Graded lakes near Bath Covered Bridge Lake
Bath Covered Bridge Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Grafton County
Frequently asked questions about Bath Covered Bridge Lake
Where is Bath Covered Bridge Lake?
- Bath Covered Bridge Lake is a lake in Grafton County, New Hampshire. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Bath Covered Bridge Lake?
- Bath Covered Bridge Lake in Grafton County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 24 acres.
Is Bath Covered Bridge Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Bath Covered Bridge Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Bath Covered Bridge Lake across LakeGrade
More New Hampshire Lake Rankings
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Panfish-rich, public access
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Other Lakes in New Hampshire
Where this data comes from
13 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
1111330013 samples · 2020–2024
Analytical methods
- Turbidity by Nephelometry
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