Conner Pond
Carroll County, New HampshireView mapDirections
NHDES publishes the water-quality measurements for Conner Pond. Here is what has been measured.
- Impaired · Mercury
- Limited data
Conner Pond in Carroll County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Water clarity: 41 ft visibility.
Conner Pond is a lake in Carroll County, New Hampshire.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2020-07-31. Methodology: how these readings are compared.
What Conner Pond is good for
From access and monitoring records, not editorial picks.
- Clear water41 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Conner Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
Whether Conner Pond 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 Conner Pond
These are the measurements NHDES publishes for Conner Pond, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 41 ft down. TSI 24.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 41ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| 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. | 24 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Conner Pond
Answers come straight from the public measurements and survey records on this page.
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Fishing Conner Pond
EPA Impairment Status
Conner Pond is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life, Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NHLAK600020802-02 · Official waterbody report
Nearby Lakes in Carroll County
Frequently asked questions about Conner Pond
Where is Conner Pond?
- Conner Pond is a lake in Carroll County, New Hampshire. Its water-quality measurements are published by NHDES and shown on this page as reported.
What is the water quality of Conner Pond?
- Conner Pond in Carroll County, New Hampshire has water-quality measurements published by NHDES, shown here as reported. Water clarity: 41 ft visibility.
Is Conner Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Conner Pond is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, pH / acidity. Check local advisories before you swim.
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Where this data comes from
1 measurement from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- North American Lake Management Society
NALMS1 sample · 2020
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