Pemigewasset Lake-Outlet
Belknap County, New HampshireView mapDirections
NHDES publishes the water-quality measurements for Pemigewasset Lake-Outlet. Here is what has been measured.
- Oligotrophic
- Limited data
Pemigewasset Lake-Outlet in Belknap County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 8.1 µg/L.
Pemigewasset Lake-Outlet is a cold, clear oligotrophic lake in Belknap County, New Hampshire. Compared to the 26 other monitored lakes in Belknap County, Pemigewasset Lake-Outlet ranks #21 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2025-08-24. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
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. Check local advisories before you swim.
Whether Pemigewasset Lake-Outlet 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 Pemigewasset Lake-Outlet
These are the measurements NHDES publishes for Pemigewasset Lake-Outlet, 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 8.1 µg/L. TSI 34.
| 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 | 8.1µg/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. | 34 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Pemigewasset Lake-Outlet
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Pemigewasset Lake-Outlet
Compare lakeside cabins, hotels, and vacation rentals near Pemigewasset Lake-Outlet in Belknap 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 Pemigewasset Lake-Outlet
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 Pemigewasset Lake-Outlet’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Pemigewasset Lake-Outlet
Nearby Lakes in Belknap County
Frequently asked questions about Pemigewasset Lake-Outlet
Where is Pemigewasset Lake-Outlet?
- Pemigewasset Lake-Outlet is a lake in Belknap County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Pemigewasset Lake-Outlet?
- Pemigewasset Lake-Outlet in Belknap County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Phosphorus: 8.1 µg/L.
Is Pemigewasset Lake-Outlet safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Pemigewasset Lake-Outlet across LakeQuality
More lakes in New Hampshire
Other Lakes in New Hampshire
Oligotrophic Lakes in New Hampshire
Where this data comes from
5 measurements from 1 monitoring station, 2024–2025. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- New Hampshire Department Of Environmental Services (BEACH)
111133005 samples · 2024–2025
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.