Salmon Falls River Impoundment Lake
Salmon Falls River Impoundment Lake in Strafford County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 6 acres.
- Area
- 6 acres
Why Salmon Falls River Impoundment 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 Salmon Falls River Impoundment 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.
Salmon Falls River Impoundment Lake is a 6-acre lake in Strafford County, New Hampshire.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-09-10. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Salmon Falls River Impoundment 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 Salmon Falls River Impoundment Lake
Compare lakeside cabins, hotels, and vacation rentals near Salmon Falls River Impoundment Lake in Strafford 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 Salmon Falls River Impoundment Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 6 acres |
No bathymetric survey has been published for Salmon Falls River Impoundment Lake, so its depth is not documented here.
Fishing Salmon Falls River Impoundment Lake
Reservoir Info (USACE NID)
Salmon Falls River Impoundment Lake is a man-made reservoir impounded by the Waumbek Dam (completed 1880), built primarily for recreation on the Salmon Falls River; concrete-type dam, 17 ft tall and 120 ft long.
- Surface area
- 6 ac
- Normal storage
- 26 ac-ft
- Max storage
- 50 ac-ft
- Drainage area
- 29 sq mi
- Hazard class
- Low
- Owner
- NH DES WATER DIVISION
Source: USACE National Inventory of Dams, NID ID NH00787 · Operator website · Matched by proximity (0.08 km)
EPA Impairment Status
Salmon Falls River Impoundment Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHIMP600030404-01 · Official waterbody report · Matched by proximity (0.05 km)
Graded lakes near Salmon Falls River Impoundment Lake
Salmon Falls River Impoundment Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Strafford County
Frequently asked questions about Salmon Falls River Impoundment Lake
Where is Salmon Falls River Impoundment Lake?
- Salmon Falls River Impoundment Lake is a lake in Strafford 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 Salmon Falls River Impoundment Lake?
- Salmon Falls River Impoundment Lake in Strafford County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 6 acres.
Is Salmon Falls River Impoundment Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Salmon Falls River Impoundment 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 Salmon Falls River Impoundment Lake across LakeGrade
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Where this data comes from
46 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)
1111330046 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