Pillsbury Lake-Deep Spot
Pillsbury Lake-Deep Spot in Merrimack County, New Hampshire has a water quality grade of B (Good). Phosphorus: 13.8 µg/L. Surface area: 67 acres.
- Area
- 67 acres
- Type
- Mesotrophic
- Public access
- Yes
Pillsbury Lake-Deep Spot is a 67-acre mesotrophic lake in Merrimack County, New Hampshire. Water quality is graded B based on 1 sampling years through 2023. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 40 other monitored lakes in Merrimack County, Pillsbury Lake-Deep Spot ranks #22 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2023-06-20. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
No clarity data. Phosphorus level: 13.8 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 13.8 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Pillsbury Lake-Deep Spot
Compare lakeside cabins, hotels, and vacation rentals near Pillsbury Lake-Deep Spot in Merrimack 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 Pillsbury Lake-Deep Spot
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 67 acres |
| Public Access | Yes |
No bathymetric survey has been published for Pillsbury Lake-Deep Spot, so its depth is not documented here.
Recreation & Access
- Pillsbury LakePublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing Pillsbury Lake-Deep Spot
Reservoir Info (USACE NID)
Pillsbury Lake-Deep Spot is a man-made reservoir impounded by the Pillsbury Lake Dam (completed 1964), built primarily for recreation on the Deer Meadow Brook; earth-type dam, 13 ft tall and 280 ft long.
- Surface area
- 67 ac
- Normal storage
- 243 ac-ft
- Max storage
- 377 ac-ft
- Drainage area
- 12.8 sq mi
- Hazard class
- Low
- Owner
- PILLSBURY LAKE DISTRICT
Source: USACE National Inventory of Dams, NID ID NH00083 · Operator website · Matched by proximity (0.15 km)
EPA Impairment Status
Pillsbury Lake-Deep Spot 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 NHIMP700030506-01 · Official waterbody report · Matched by proximity (0.64 km)
County Ranking
Ranked #22 of 41 lakes in Merrimack County
Nearby Lakes in Merrimack County
Frequently asked questions about Pillsbury Lake-Deep Spot
Where is Pillsbury Lake-Deep Spot?
- Pillsbury Lake-Deep Spot is a lake in Merrimack County, New Hampshire. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Pillsbury Lake-Deep Spot?
- Pillsbury Lake-Deep Spot in Merrimack County, New Hampshire has a water quality grade of B (Good). Phosphorus: 13.8 µg/L. Surface area: 67 acres.
Is Pillsbury Lake-Deep Spot safe to swim in?
- Good for swimming, clear water with low algae levels. Pillsbury Lake-Deep Spot has a water quality grade of B (Good). Always check local health department advisories before swimming.
Are there boat ramps on Pillsbury Lake-Deep Spot?
- Pillsbury Lake-Deep Spot has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Pillsbury Lake. Public access is listed as yes.
Explore Pillsbury Lake-Deep Spot 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 Grade B Lakes in New Hampshire
Hillsborough County · Good
Hillsborough County · Good
Hillsborough County · Good
Hillsborough County · Good
Belknap County · Good
Hillsborough County · Good
Mesotrophic Lakes in New Hampshire
Where this data comes from
4 measurements from 1 monitoring station, 2022–2023. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
111133004 samples · 2022–2023
Analytical methods
- 10-115-01-1 F ~ LACHAT; Total Phosphorus- Manual persulfate digest
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