Noone Falls Mill Dam Lake
Noone Falls Mill Dam Lake in Hillsborough County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 19 acres.
- Area
- 19 acres
- Public access
- Yes
Why Noone Falls Mill Dam 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 Noone Falls Mill Dam 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.
Noone Falls Mill Dam Lake is a 19-acre lake in Hillsborough 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 2022-07-12. 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 Noone Falls Mill Dam 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 Noone Falls Mill Dam Lake
Compare lakeside cabins, hotels, and vacation rentals near Noone Falls Mill Dam Lake in Hillsborough 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 Noone Falls Mill Dam Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 19 acres |
| Public Access | Yes |
No bathymetric survey has been published for Noone Falls Mill Dam Lake, so its depth is not documented here.
Recreation & Access
- Marshall/Thomas Recreation AreaPublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing Noone Falls Mill Dam Lake
Reservoir Info (USACE NID)
Noone Falls Mill Dam Lake is a man-made reservoir impounded by the Noone Mills (completed 1938), built primarily for hydroelectric on the Contoocook River; concrete-type dam, 14 ft tall and 176 ft long.
- Surface area
- 19 ac
- Normal storage
- 135 ac-ft
- Max storage
- 135 ac-ft
- Drainage area
- 6 sq mi
- Hazard class
- Significant
- Owner
- The Cobbs, LLC
Source: USACE National Inventory of Dams, NID ID NH00427 · Operator website · Matched by proximity (0.08 km)
EPA Impairment Status
Noone Falls Mill Dam 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 NHIMP700030104-04 · Official waterbody report · Matched by proximity (0.24 km)
Graded lakes near Noone Falls Mill Dam Lake
Noone Falls Mill Dam Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Hillsborough County
Frequently asked questions about Noone Falls Mill Dam Lake
Where is Noone Falls Mill Dam Lake?
- Noone Falls Mill Dam Lake is a lake in Hillsborough 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 Noone Falls Mill Dam Lake?
- Noone Falls Mill Dam Lake in Hillsborough County, New Hampshire is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 19 acres.
Is Noone Falls Mill Dam Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Noone Falls Mill Dam Lake 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 Noone Falls Mill Dam Lake?
- Noone Falls Mill Dam Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Marshall/Thomas Recreation Area. Public access is listed as yes.
Explore Noone Falls Mill Dam Lake 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
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Where this data comes from
15 measurements from 1 monitoring station, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
1111330015 samples · 2020–2022
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
Named boat-access points from the USGS National Boat Ramps inventory