Stinson Lake-Near Outlet
Stinson Lake-Near Outlet in Grafton County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 5.2 µg/L. Surface area: 344 acres.
- Area
- 344 acres
- Public access
- Yes
Why Stinson Lake-Near Outlet 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 Stinson Lake-Near Outlet, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus, but not water clarity and algae (chlorophyll-a).
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.
Stinson Lake-Near Outlet is a 344-acre lake in Grafton County, New Hampshire. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-07-05. 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 Stinson Lake-Near Outlet
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 5.2 µg/L. Trophic State Index: 28.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 5.2 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 28 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Stinson Lake-Near Outlet
Compare lakeside cabins, hotels, and vacation rentals near Stinson Lake-Near Outlet 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 Stinson Lake-Near Outlet
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 344 acres |
| Public Access | Yes |
No bathymetric survey has been published for Stinson Lake-Near Outlet, so its depth is not documented here.
Recreation & Access
- Stinson LakePublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing Stinson Lake-Near Outlet
Reservoir Info (USACE NID)
Stinson Lake-Near Outlet is a man-made reservoir impounded by the Stinson Lake Dam (completed 1780), built primarily for recreation on the Stinson Brook; earth-type dam, 8 ft tall and 158 ft long.
- Surface area
- 344 ac
- Normal storage
- 459 ac-ft
- Max storage
- 1,890 ac-ft
- Drainage area
- 7.83 sq mi
- Hazard class
- Low
- Owner
- NH DES WATER DIVISION
Source: USACE National Inventory of Dams, NID ID NH00399 · Operator website · Matched by proximity (0.06 km)
EPA Impairment Status
Stinson Lake-Near Outlet 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 NHLAK700010306-01 · Official waterbody report · Matched by proximity (1.06 km)
Graded lakes near Stinson Lake-Near Outlet
Stinson Lake-Near Outlet has no grade, but these lakes within a short drive do.
Nearby Lakes in Grafton County
Frequently asked questions about Stinson Lake-Near Outlet
Where is Stinson Lake-Near Outlet?
- Stinson Lake-Near Outlet 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 Stinson Lake-Near Outlet?
- Stinson Lake-Near Outlet in Grafton County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 5.2 µg/L. Surface area: 344 acres.
Is Stinson Lake-Near Outlet safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Stinson Lake-Near Outlet is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Stinson Lake-Near Outlet?
- Stinson Lake-Near Outlet has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Stinson Lake. Public access is listed as yes.
Explore Stinson Lake-Near Outlet across LakeGrade
More New Hampshire 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 New Hampshire
Oligotrophic Lakes in New Hampshire
Where this data comes from
3 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
111133003 samples · 2020–2021
Analytical methods
- 10-115-01-1 F ~ LACHAT; Total Phosphorus- Manual persulfate digest
- 2130 B ~ Nephelometric Method
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
Named boat-access points from the USGS National Boat Ramps inventory