Weare Reservoir-Deep Spot
Hillsborough County, New Hampshire54 acresView mapDirections
NHDES publishes the water-quality measurements for Weare Reservoir-Deep Spot. Here is what has been measured.
- Mesotrophic
- Impaired · Biotoxins
- Public access
Weare Reservoir-Deep Spot in Hillsborough County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 14.1 µg/L. Surface area: 54 acres.
Weare Reservoir-Deep Spot is a 54-acre mesotrophic lake in Hillsborough County, New Hampshire. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 35 other monitored lakes in Hillsborough County, Weare Reservoir-Deep Spot ranks #13 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-09-09. Methodology: how these readings are compared.
What Weare Reservoir-Deep Spot is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
Readings onlyBacteria advisory
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Weare Reservoir-Deep Spot is listed impaired under Clean Water Act §303(d) (IR 5) for biotoxins, mercury, pH / acidity. Check local advisories before you swim.
Whether Weare Reservoir-Deep Spot is safe to swim in today is a call for the New Hampshire Department of Environmental Services and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Weare Reservoir-Deep Spot
These are the measurements NHDES publishes for Weare Reservoir-Deep Spot, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 14.1 µg/L. TSI 42.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 14.1µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 42 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Weare Reservoir-Deep Spot
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
54 acres
Public access
Yes
Listed by NHDES
No bathymetric survey has been published for Weare Reservoir-Deep Spot, so its depth is not documented here.
Recreation & Access
- Chase Park Town BeachPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Weare Reservoir-Deep Spot
Compare lakeside cabins, hotels, and vacation rentals near Weare Reservoir-Deep Spot 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 Weare Reservoir-Deep Spot
Prices for Oct 9–11, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Follow Weare Reservoir-Deep Spot’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Weare Reservoir-Deep Spot
Reservoir Info (USACE NID)
Weare Reservoir-Deep Spot is a man-made reservoir impounded by the Weare Reservoir Dam (completed 1700), built primarily for recreation on the Wolf Brook; rockfill-type dam, 8 ft tall and 100 ft long.
- Surface area
- 54 ac
- Normal storage
- 19.6 ac-ft
- Max storage
- 148.7 ac-ft
- Drainage area
- 1.76 sq mi
- Hazard class
- High
- Owner
- TOWN OF BROOKLINE
Source: USACE National Inventory of Dams, NID ID NH00114 · Operator website · Matched by proximity (0.61 km)
EPA Impairment Status
Weare Reservoir-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
Designated uses not supporting: Aquatic life, Fish consumption, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK700060601-05-01 · Official waterbody report
Nearby Lakes in Hillsborough County
Frequently asked questions about Weare Reservoir-Deep Spot
Where is Weare Reservoir-Deep Spot?
- Weare Reservoir-Deep Spot is a lake in Hillsborough County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Weare Reservoir-Deep Spot?
- Weare Reservoir-Deep Spot in Hillsborough County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 14.1 µg/L. Surface area: 54 acres.
Is Weare Reservoir-Deep Spot safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Weare Reservoir-Deep Spot is listed impaired under Clean Water Act §303(d) (IR 5) for biotoxins, mercury, pH / acidity. Check local advisories before you swim.
Are there boat ramps on Weare Reservoir-Deep Spot?
- Weare Reservoir-Deep Spot has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Chase Park Town Beach. Public access is listed as yes.
Can I fish at Weare Reservoir-Deep Spot?
- Weare Reservoir-Deep Spot has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by New Hampshire's fish and wildlife agency, so check its current regulations before you go.
Explore Weare Reservoir-Deep Spot across LakeQuality
More lakes in New Hampshire
Other Lakes in New Hampshire
Merrimack County · Measured
Merrimack County · Measured
Merrimack County · Measured
Merrimack County · Measured
Merrimack County · Measured
Merrimack County · Measured
Mesotrophic Lakes in New Hampshire
Where this data comes from
23 measurements from 1 monitoring station, 2023–2025. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
1111330023 samples · 2023–2025
Analytical methods
- 10-115-01-1 F ~ LACHAT; Total Phosphorus- Manual persulfate digest
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from 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