Otternick Pond-Deep Spot
Hillsborough County, New HampshireView mapDirections
NHDES publishes the water-quality measurements for Otternick Pond-Deep Spot. Here is what has been measured.
- Eutrophic
- Impaired · Algal growth
- Public access
Otternick Pond-Deep Spot in Hillsborough County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 23.7 µg/L. Chlorophyll-a (algae): 7.8 µg/L.
Otternick Pond-Deep Spot is a productive, nutrient-rich eutrophic 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, Otternick Pond-Deep Spot ranks #21 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2023-06-22. Methodology: how these readings are compared.
What Otternick Pond-Deep Spot is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
Readings onlyRecreation use not supported
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. Otternick Pond-Deep Spot is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, nuisance exotic species, oxygen depletion (low DO). Check local advisories before you swim.
Whether Otternick Pond-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 Otternick Pond-Deep Spot
These are the measurements NHDES publishes for Otternick Pond-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 23.7 µg/L. Chlorophyll-a 7.8 µg/L. TSI 50.
| 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 | 23.7µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 7.8µg/L | Fair GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 50 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Otternick Pond-Deep Spot
Answers come straight from the public measurements and survey records on this page.
Recreation & Access
- Claveau LandingPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Otternick Pond-Deep Spot
Compare lakeside cabins, hotels, and vacation rentals near Otternick Pond-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 Otternick Pond-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 Otternick Pond-Deep Spot’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Otternick Pond-Deep Spot
EPA Impairment Status
Otternick Pond-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 NHLAK700061206-02 · Official waterbody report
Nearby Lakes in Hillsborough County
Frequently asked questions about Otternick Pond-Deep Spot
Where is Otternick Pond-Deep Spot?
- Otternick Pond-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 Otternick Pond-Deep Spot?
- Otternick Pond-Deep Spot in Hillsborough County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 23.7 µg/L. Chlorophyll-a (algae): 7.8 µg/L.
Is Otternick Pond-Deep Spot safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Otternick Pond-Deep Spot is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, nuisance exotic species, oxygen depletion (low DO). Check local advisories before you swim.
Are there boat ramps on Otternick Pond-Deep Spot?
- Otternick Pond-Deep Spot has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Claveau Landing. Public access is listed as yes.
Can I fish at Otternick Pond-Deep Spot?
- Otternick Pond-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 Otternick Pond-Deep Spot across LakeQuality
More lakes in New Hampshire
Other Lakes in New Hampshire
Rockingham County · Measured
Rockingham County · Measured
Rockingham County · Measured
Rockingham County · Measured
Rockingham County · Measured
Rockingham County · Measured
Eutrophic Lakes in New Hampshire
Where this data comes from
17 measurements from 1 monitoring station, 2020–2023. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
1111330017 samples · 2020–2023
Analytical methods
- 10-115-01-1 F ~ LACHAT; Total Phosphorus- Manual persulfate digest
- CHLOROPHYLL A-B-C DETERMINATION (MODIFIED)
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